This is the general class for the pumping of fluids, and includes
the pumping of slurries, fluent material and the like if handled
in a manner not inconsistent with the handling of fluids. With
the exception of "gettering pumps" as discussed
in Lines With Other Classes and Within This Class, below, a pump
is defined as means to move a fluid by taking it from one place
or location and moving it to another place or location different
from whence it came, the pump, therefore having an inlet and an
outlet for the pumped fluid which are separate and distinct.
The pumping of the fluid is generally accomplished by action
thereon of a mechanical member (e.g., piston) or by contact or entrainment
with another fluid (e.g. jet pumps). Also, the pumping may be accomplished
by the direct action on the pumped fluid of an electric or magnetic
force (e.g., electromagnetic pumps). However, for the line with
respect to "ion pumps", see Lines With Ohter Classes
and Within This Class and Subclass References to the Current Class,
below.
VACUUM FORMATION BY GETTERING
This class is the residual home for the formation of a vacuum
in an enclosed space by a gettering action; a getter being a material
which when placed in an enclosed space reduces the gas or vapor
content of the space either by a chemical or physical action. Also, included
are those devices and processes in which the fluid is ionized to
permit or enhance the gettering action. These devices are often
termed "getter-ion pumps". See the notes and
search notes in subclasses 48 and 49 for a statement of the lines.
SECTION II - LINES WITH OTHER CLASSES AND WITHIN THIS CLASS
LINE WITH CLASS 313 AND CLASS 315
For the line with Classes 313, Electric Lamp and Discharge
Devices and 315, Electric Lamp and Discharge Devices: Systems,
with respect to "ion pumps", see Subclass References
to the Current Class, below.
RELATIONSHIP TO CLASS 91, MOTORS: EXPANSIBLE CHAMBER TYPE
Refer to Lines With Other Classes and Within This Class in
the class definition of Class 91 for a statement of the line between
Classes 91 and 417.
RELATIONSHIP TO CLASS 92, EXPANSIBLE CHAMBER DEVICES
Class 92 is directed to expansible chamber devices, per se,
and with respect to nonrotary expansible chamber pumps is related
to Class 417 as a subcombination thereof. Class 92 is limited to
expansible chamber devices in which the working member has an oscillating or
reciprocating motion to expand and contract the chamber. Thus,
Class 92 cannot take the subcombination of any rotary expansible
chamber pump. See the note below regarding the relationship of
this class (417) and Class 418, Rotary Expansible Chamber Devices,
for the disposition of this art.
Set forth below are the lines between Class 92 and Class 417
as they relate to nonrotary expansible chamber pumps:
A. With Drive Means
1. Motor Driven
Class 92 excludes motor driven expansible chamber devices
when the motor is significantly claimed. See (2) Note in Class
417 subclass 321 for a statement of what constitutes a significantly
claimed motor.
2. Operated By Art Device
Class 92 excludes an expansible chamber pump mounted upon
or adjacent to an art device to be operated thereby. See Class
417 subclasses 229+ for this subject matter and for a definition
of an art device.
3. Other Drive Mechanism
Other specific means to drive an expansible chamber pump such
as gearing, linkage, etc., including disconnectable drives are not
excluded from Class 92.
B. Valving
1. Pump Fluid
Class 92 excludes any expansible chamber pump which includes
control of the pump fluid by a valving action. Thus, any claimed
valving of pump fluid of an expansible chamber pump is sufficient
to preclude classification in Class 92 even though the valving claimed
may not be all of the valving necessary to cause the pump to operate in
the intended manner.
2. Nonpump Fluid
Class 92 does not exclude valving of nonpump fluid as, for
example, valving for lubricant, coolant, sealant, etc.
C. With Diverse Pump
An expansible chamber pump in combination with another pump
of a different type (i.e., which, per se, would not be classified
in Class 92) is excluded from Class 92 unless the pump of a different
type is a mere auxiliary of the expansible chamber pump (i.e., lubricant
or coolant pump, etc.).
Relationship to Class 137, Fluid Handling. The line between
Classes 137 and 417 is generally that of combination and subcombination.
Class 137 generally provides for fluid handling systems and Class
417 generally provides for motor driven pumps and pumps, per se. There
are certain areas of subject matter which are considered to be peculiar
to pumps and their operation and are considered as exceptions to
the general rule stated above. These exceptions and other detailed
lines will be set out below.
D. Pump-Tank Relationship
The combination of a pump and a tank generally will be classified
in Class 137. However, a single nominally recited tank, reservoir,
chamber, pump or other similar fluid holding means will be considered
as merely a flow line or conduit and will be classified in Class
417. See (9) Note in the Class Definition of Class 222, Dispensing,
regarding other pump-tank relationships.
E. Pump-Accumulator Relationship
An accumulator or surge dampening device is usually a device
having a single fluid opening and is connected to a pump inlet or
outlet for the purpose of maintaining a smooth flow to or from the
pump. Such devices when disclosed for the purpose of surge dampening
or insuring smooth flow and claimed in combination with a pump are
classified in Class 417.
F. Pump-Liquid Accumulation Control Relationship
1. A pump claimed in combination with a liquid accumulation
controlled valve is classified in Class 137 with the following exceptions
which are classifiable in Class 417:
a. When the liquid accumulation responsive valve controls
a liquid flow to the pump or a gas relief from the pump is for the
specifically disclosed purpose of priming the pump, see Class 417,
subclasses 200 and 435.
b. When the liquid accumulation responsive valve functions
as a pump valve in a fluid displacement-type pump, see Class 417,
subclass 65 in general and subclasses 126+ and 138 in particular.
c. When the liquid accumulation responsive valve is the distributor
of an expansible chamber-type pump, see Class 417, subclass 297.5.
2. A Jet pump claimed in combination with liquid level responsive
regulating means therefor is classified in Class 417, subclass 182.5.
3. A pump claimed in combination with liquid accumulation-controlled
drive transmission therefor is classified in Class 417, subclass
211.5.
4. A pump claimed in combination with a liquid accumulation
controlled-drive motor therefor is classified in Class 417, subclasses
36+.
G. Pump-Plural Serial Valve Relationship
A pump claimed in combination with plural serial valves in
either or both an inlet or an outlet flow path and without any branched
flow paths is classifiable in Class 417. The rule for serial valves
applies even though one or more of the valves is manually operated or
condition responsive, see Class 417 for serial pump distributors,
for a manually operated valve in serial relationship with a pump
distributor, and for a condition responsive valve in combination
with a pump. (See Subclass References to the Current Class, below.)
H. Pump-Main Flow Path and Branched Flow Path Relationship
Generally a branched flow system having a main flow path and
a branched flow path, whether including a pump or not, is classifiable
in Class 137. However, there are a number of exceptions which usually
depend upon the disclosure in the particular patent as set forth below.
1. A pump having plural branched flow paths, whether valved
or not, communicating with a single source or receiver is classifiable
in Class 417. Where there is no specific disclosure of the source
or receiver for the flow paths, the disclosure will be considered
as if there were a single source or receiver and will be classified
in Class 417.
2. A pump having a main flow path and a branched flow path,
each communicating with separate sources or receivers is classifiable
in Class 417 if:
a. the source or receiver for the main flow path is unclaimed
or nominally claimed and
b. the branched flow path is specifically disclosed as a relief
inlet or outlet for the pump, a priming inlet to the pump, a bypass
around the pump, or a vent, waste or drain outlet from the pump,
and either(1) the main flow path is uncontrolled or (2) the main
flow path is controlled and the branched flow line is (a) uncontrolled, (b)
manually controlled or (c) controlled by a condition responsive
valve responding to a condition in the main flow path which is sensed
between the pump and the main flow path controller.
I. Condition Responsive Control of Pump Drive Motor
A motor driven pump having a condition responsive control
for controlling the operation of the motor is classifiable in Class
417. The combination of a pump and a disconnectable drive, clutch
or variable transmission having a condition responsive control is
classifiable in Class 417. (See Subclass References to the Current Class,
below.)
J. Direct Response Valve-Pump Cylinder Relationship
The combination of one or more direct response valves of the
type classifiable in Class 137, subclasses 511+ and a nominally
recited cylinder is classifiable in Class 137. The specific recitation
of a cylinder head is not considered to be a specific recitation
of the cylinder.
RELATIONSHIP TO CLASS 415, ROTARY KINETIC FLUID MOTORS OR
PUMPS
Class 415 takes rotary, nonexpansible chamber-type pumps.
However, Class 417 provides for rotary, nonexpansible chamber-type
pumps in certain combinations as enumerated below. Unless specifically
excluded below, a patent to a rotary nonexpansible chamber-type pump,
as defined in the class definition of Class 415, will be classified
as an original in Class 415 as opposed to Class 417.
1. With Drive Means
a. Motor Driven
Class 415 excludes motor driven rotary nonexpansible chamber-type
pumps when the motor-pump combination is significantly claimed.
For a detailed explanation of what constitutes a significantly
claimed motor-pump combination see Subclass References to the Current Class
in this class and Lines With Other Classes and Within This Class,
General Relationship With Other Classes, paragraph A in the Class
415 definition.
b. Operated By Art Device
A rotary, nonexpansible chamber- type pump operated by an
art device is excluded from Class 415. See Class 417 for this subject
matter and the definition of an art device. (See Subclass References
to the Current Class, below.)
c. Other Drive Mechanism
Other specific means to drive a rotary, nonexpansible chamber
pump such as gearing, linkage, etc., including disconnectable drives
(e.g., clutch) are not excluded from Class 415.
2. With Diverse Pump
The combination of a rotary, nonexpansible chamber-type
pump with another pump of a different type (e.g., recipro- cating,
rotary expansible chamber, etc.), is excluded from Class 415 and
is classified in Class 417 unless the different type pump is a mere
auxiliary of the rotary, nonexpansible chamber-type pump (e.g.,
lubricating or coolant pump). In the latter case, classification in
Class 415 is proper.
Relationship to Class 418, Rotary Expansible Chamber Devices
Class 418 takes rotary expansible chamber pumps even though
the disclosure and claims may be restricted to pump use. In some
ways Class 418 may be considered to be less comprehensive than Class
417 and rotary expansible chamber-type pumps in certain combinations enumerated
below will be classified in Class 417 rather than Class 418. Unless
specifically excluded below a patent to a rotary expansible chamber
type as defined in the Class Definition of Class 418 will be classified
as an original in Class 418 as opposed to Class 417:
3. With Drive Means
a. With Motor
Class 418 excludes motor driven rotary expansible chamber
devices when the motor is significantly claimed even if the motor
is of the rotary expansible chamber type. For a detailed explanation
of what constitutes a significantly claimed motor; see Subclass
References to the Current Class, below.
b. Operated By Art Device
A rotary expansible chamber pump mounted upon or adjacent
an art device to be operated thereby is excluded from Class 418.
See this class (417) for this subject matter and the definition
of an art device. (See Subclass References to the Current, Class,
below.)
c. Other Drive Mechanism
Other specific means to drive the pump such as gearing, linkage,
etc., including disconnectible drives (e.g., clutch) are not excluded
from Class 418 even if the drive is not reversible.
4. Valving
a. Cyclic or Position Responsive
Class 418 will take rotary expansible chamber pumps combined
with valves for the pumped fluid which have a repetitive pattern
or cycle of operation which is related to the rotation of the pump.
These may be termed cyclic or position responsive valving and include
the opening and closing of inlet or exhaust ports by the movement
of the rotor past same. The adjustment of this type valving so
as to provide, for example, early cutoff of supply is also included
in Class 418. The inclusion, however, of means to cutoff operation
of the pump after a predetermined number of revolutions is excluded
from Class 418, this being considered to be a dispensing feature
for Class 222, Dispensing.
b. In-Line
An in-line valve is defined as one situated in the normal line
of pumped fluid flow which acts in some way to control the flow
in that line, but not by diverting the fluid to a second or subsidiary
flow line (e.g., bypass). Class 418 will take all in-line valves
combined with a rotary expansible chamber pump which are controlled by
some means other than a condition of the pumped fluid (e.g., manual
throttle) and will also take those which are actuated directly by
the application of the pumped fluid thereto (i.e., direct response
valves). Those devices including in-line valves which are controlled
by a pumped fluid condition (e.g., pressure, flow) and in which
said valves are not of the direct response type are excluded from
Class 418 and will be classified in Class 417 if otherwise appropriate.
c. Branched Flow or By-pass
i. Separate Valve Means
Those rotary expansible chamber devices which include a separate
valve means (as opposed to a movable chamber part as discussed in
paragraph (2) immediately below) to divert or bypass all or a portion
of the pumped fluid from its normal or first course of flow to a
second or waste path are excluded from Class 418 regardless of whether
the valve is manually or otherwise controlled unless the diverted
fluid is used merely for a pump perfecting function such as lubricating,
cooling, vane bias, etc.
ii. Movable Chamber Part
Many rotary expansible chamber pumps have expansible chamber
parts which are in running contact with other chamber parts and
which move from a "normal" or contacting position
to a noncontacting position and in so moving allow passage or bypass
of pumped fluid thereby. Exemplary of such parts are vanes, abutments, end
plates, etc., and such parts are usually biased into contacting
position by means such as a spring, pressure fluid conducted from
the expansible chamber or the like. Such devices are not excluded
from Class 418 even though the yielding of the part may be considered
to be performing a bypassing function. However, if pumped fluid
is conducted to the part for such a biasing function (e.g., behind
end plate) and there is a controlled application of fluid to or
release of the fluid from the bias area for the disclosed purpose
of bypassing said fluid or conducting it to another point of use
such devices are excluded from Class 418 and are classified in Class
417 if otherwise appropriate. Also Class 418 excludes a pump having
a movable chamber part whose movement is controlled in response
to the pressure or flow of the pumped fluid of a second rotary expansible
chamber device.
d. Reversible or Unidirectional Flow
Some rotary expansible pumps are provided with adjustable
or self-acting means by which for a given direction of rotation
of the pump the flow may be reversed in the line in which the fluid
is being pumped, or upon reversal of the direction of rotation of
the pump the flow will continue in the same direction in the pumped
fluid flow line. This, per se, will not serve to preclude classification
in Class 418.
5. With Diverse Pump
The combination of a rotary expansible chamber pump with another
pump of a different type (centrifugal, reciprocation, etc.), is
excluded from Class 418 and is classified in Class 417 unless the
different type pump is a mere auxiliary of the rotary expansible
chamber pump as, for example, a lubricating or cooling fluid pump,
etc. In the latter case classification in Class 418 is proper.
SECTION III - SUBCLASS REFERENCES TO THE CURRENT CLASS
for a condition responsive valve in combination
with a pump, subclass 441 for a manually operated valve in serial
relationship with a pump distributor, and subclass 456 for serial pump
distributors.
Refrigeration,
subclass 55.5 for cold traps including those in which the sole
disclosure is to act as a "pump" and for cold
traps combined with a nominally claimed mechanical or roughing pump.
Class 417, however, takes the combination of a cold trap and a significantly claimed
device of this class (pump).
Wells, appropriate subclasses for pumps combined with well processes
or features especially,
subclasses 369+ for well production processes including pumping
steps, subclasses 53+ for automatic wells including control
of a pump in response to a well condition, subclass 54.1 for wells
with means for separately pumping from plural sources in a well,
subclasses 61 and 62 for heating, refrigerating or insulating means
with an eduction pump or plunger in the well, subclasses 68+ for
above and below ground structure including an eduction pump or plunger
in the well, subclasses 105+ for a well with an eduction
pump or plunger in the well, subclass 176 well brushing, scraping,
cutting or punching-type cleaners on a pump sucker rod, subclasses
316+ for valves including well pump or tubing drain valves.
Conveyors: Fluid Current, appropriate subclasses for systems which transport solids
by means of a fluid current, and which include a pump for generating
the fluid current. See particularly
subclasses 10+ for control circuits for pump drives, which are
responsive to a sensed condition, and subclasses 45 and 46+ for
subject matter relating to the pumping and transportation of slurries.
Rotary Kinetic Fluid Motors or Pumps, for rotary fluid kinetic energy devices disclosed
as a pump or a motor. Class 415 will also take a plurality of such
devices in which each is a pump or each is a motor. Class 417 will
take a rotary fluid kinetic energy motor driving a rotary fluid
kinetic energy pump if a claim sets out that one is a motor and
one is a pump. However, Class 415 will take this disclosed motor
driven pump relation if a claim does not reflect that one is a motor
and the other a pump.
Fluid Reaction Surfaces (i.e., Impellers), appropriate subclasses for motor driven fluid reaction
surfaces (i.e., impellers) in which there is no claimed fluid confining
or deflecting means, upstream or downstream of or encompassing the
impeller.
Rotary Expansible Chamber Devices, for rotary expansible chamber devices disclosed
as a pump or a motor. Class 418 will also take a plurality of such
devices in which each is a pump or each is a motor. Class 418 will
not take a rotary expansible chamber-type motor driving a rotary
expansible chamber-type pump if a claim recites one as a motor and
one as a pump. However, Class 418 will take this disclosed motor
driven pump relationship if a claim does not reflect that one is
a motor and the other a pump.
Superconductor Technology: Apparatus, Material,
Process,
subclasses 150+ for high temperature (Tc
30 K) superconducting devices, and particularly subclass 165 for pumps
utilizing a suspension of superconducting particulate material,
and cross-reference art collection 910 for pumps utilizing superconducting
materials.
Prosthesis (i.e., Artificial Body Members), Parts
Thereof, or Aids and Accessories Therefor,
subclass 3 for pumps solely disclosed as artificial hearts.
This subclass is indented under the class definition. Subject matter in which the pump is provided with (1) a
motor to drive the fluid moving element thereof, (2) control means
to control the motor in some manner and (3) a separate sensing means
which is responsive to the occurrence of a condition or a change
in condition of either the pump or the fluid being pumped and which
causes operation of the control means to alter the operation of
the motor.
(1)
Note. Sensing of the speed of a motor which is mechanically
connected to the pump for driving same is considered as sensing
a condition of the pump and is included under this definition.
for pumps which are cyclically driven by a cyclically
operable motor and in which the control of the motor is caused to
operate cyclically by a cyclically changing condition of the pump
or pump fluid such that this change of condition and its control
of the motor are the normal manner of operation.
This subclass is indented under subclass 1. Subject matter comprising at least two pumps which are either
(1) independently driven by separate drive motors, (2) adapted to
be supplied from separate sources, or (3) adapted to deliver to
separate destinations.
(1)
Note. For purposes of this definition, a single cylinder
having a pumping member (e.g., piston) which serves to divide the
cylinder into two pumping chambers is considered to comprise plural
pumps if the pump chambers are adapted to deliver fluid to separate
destinations or receive fluid from separate sources.
(2)
Note. To be included under this definition, the plural pumps
must supply fluid for external use (i.e., one may not be a mere
auxiliary of another such as a lubricant, coolant, or priming pump).
(3)
Note. An entrainment-type pump (e.g., jet pump) has not been
construed as motor driven and consequently the combination of a
condition responsive motor driven pump and jet pump is not included
under part (1) of the above definition and such combination would
be classified here only if the motor driven pump and jet pump respectively
deliver to separate destinations or receive fluid from separate
sources.
This subclass is indented under subclass 2. Subject matter in which each of said plural pumps has its
respective inlet or outlet connected to a single flow line so that
fluid will flow either to or from said pumps through said flow line.
(1)
Note. For purposes of this definition, a common inflow or
outflow line is defined as a conduit or tank in that portion of
the system which handles fluid flow to or from two or more pumps.
Patents disclosing parallel flow paths in which a pressure condition
is sensed in one path only, but for the disclosed purpose of indicating
the common flow line pressure condition, have been placed in subclass
2, above, and appropriately cross-referenced into this subclass
or those indented hereunder.
This subclass is indented under subclass 3. Subject matter in which sensing means is operative to sense
a condition or change of condition occurring in the fluid in the
common flow line joining either the pump inlets or pump outlets.
This subclass is indented under subclass 4. Subject matter in which each of said plural pumps is driven
by separate drive motor and the control means is operative to simultaneously
or relatively control the operation of each of said plural drive
motors.
This subclass is indented under subclass 5. Subject matter in which there is an additional sensing means
to sense a condition or change in condition in either (1) a fluid
flow line which is peculiar to a single pump, or (2) a pump which
is peculiar to a single flow line, said additional sensing means
serving to effect operation of the same or different control means.
This subclass is indented under subclass 5. Subject matter in which the control means for the pumps
comprise a start and stop device for the motor of each pump and
which are related to one another in such a manner that the pumps will
either be started or stopped in a certain order in response to changes
in conditions sensed by the sensing means.
This subclass is indented under subclass 7. Subject matter having means related to the control means
for cyclically changing the order of starting or stopping the pump
drive motors.
This subclass is indented under subclass 1. Subject matter in which there is means provided for accumulating
or detecting leakage of pump fluid from the pump or system or leakage of
an extraneous fluid into the pump or system and the control means
acts in response to such leakage to stop operation of the pump motor.
(1)
Note. There must be a specific disclosure that the fluid
which causes operation of the control means has leaked from the
device. The mere possibility of detecting leakage by some conventional means,
such as a pressure responsive device, is not sufficient for classification in
this subclass.
This subclass is indented under subclass 1. Subject matter in which the drive motor comprises an engine
in which fuel is burned in a chamber from which power is directly
derived and the control means is operative to either (1) control
actuation of a secondary motor which is utilized for initiating
operation of the fuel burning engine or (2) control operation of
the pump to cause same to be operated as a motor for initiating
operation of the fuel burning engine.
This subclass is indented under subclass 1. Subject matter in which the drive motor is of the reciprocating
expansible chamber type and derives its power by the burning of
fuel in the chamber and in which the piston or working member of
the motor is free of any mechanical linkage or gearing which limits
its movement to a fixed stroke during its cycle of operation.
This subclass is indented under subclass 1. Subject matter having means related to the sensing means
for either (1) causing the state of operation of the drive motor
to be maintained for a specified period of time after a condition or
change in condition is detected by the sensing means before allowing
the state of operation to be changed in accordance with the sensed
condition, (2) allowing the state of operation of the drive motor
to be changed in response to a sensed condition and then causing
said changed state of operation to be maintained for a specified
period of time regardless of further condition changes, (3) causing
the control means or sensing means to be ineffective for a specified
period of time during motor start up, or (4) altering the effectiveness
of the control means for a specified period of time after the sensing
means has detected a change in condition.
(1)
Note. A fluid dashpot or damper utilizing fluid independent
of the pump fluid and which serves only to attenuate the effect
of periodic condition fluctuations of short duration is not considered
to be a delay or timing means under this definition.
This subclass is indented under subclass 1. Subject matter including a means to supply lubricating,
sealing, or cooling fluid to the pump and the sensing means senses
a condition or change of condition of said lubricating, sealing,
or cooling means and operates the motor control means in response
thereto.
This subclass is indented under subclass 1. Subject matter including an additional sensing means operatively
connected to the control means, said additional sensing means being responsive
to a condition or change of condition (e.g., ambient condition)
of the surrounding environment.
This subclass is indented under subclass 1. Subject matter in which there is additionally provided means
for transmitting motion from the motor to the pump and control means
for either (1) interrupting motion of the pump (e.g., clutch, lock,
etc.), (2) varying the rate of motion of the pump (e.g., brake,
adjustable gearing, etc.) or (3) changing the swept volume of pumping
member or motor working member displacement of an expansible chamber-type pump
or motor (e.g., stroke control).
This subclass is indented under subclass 1. Subject matter in which the pump is driven by two or more
individual motors, each of said motors having a motor working member
for driving the same fluid moving element of the pump and in which
at least one of the motors is controlled by the controlling means.
for condition responsive control of a starter motor
for an internal combustion engine. The starter motor, even though
it may incidentally drive the pump while cranking the combustion engine,
is not considered to be a separate pump drive motor for this subclass.
This subclass is indented under subclass 1. Subject matter in which the control means comprises two
or more controlling elements which are capable of being separately
actuated in response to the same or different conditions to separately
control the drive motor.
for condition responsive control of a starter motor
for an internal combustion engine, such apparatus usually incorporating
a separate control means for terminating operation of the internal
combustion engine.
This subclass is indented under subclass 1. Subject matter comprising a single drive motor controlling
element which is caused to be operated in response to means sensing
plural conditions which are (1) different in kind, e.g., pressure
and flow rate, or (2) if of the same kind, different by the part
of the system characterized by the condition, e.g., inlet and discharge
pressures of the pump.
(1)
Note. The diverse condition may be a condition external of
the pump or pump fluid system, e.g., a drive motor condition.
This subclass is indented under subclass 18. Subject matter in which the sensing means responds to a
condition or change of condition on the fluid inlet or intake side
of the pump and a condition or change of condition on the fluid outlet
or discharge side of the pump.
This subclass is indented under subclass 18. Subject matter in which one of the plural conditions to
which the sensing means responds is a change in rate of pump fluid
flow to, or from the pump.
This subclass is indented under subclass 18. Subject matter in which the drive motor is of the type which
is motivated by a fluid and one of the plural conditions to which
the sensing means responds is a condition or change in condition
of the motor driving fluid.
This subclass is indented under subclass 18. Subject matter in which one of the plural conditions to
which the sensing means responds for causing operations of the single
drive motor control element is the rate of speed at which the pump
is driven.
This subclass is indented under subclass 22. Subject matter having valve means for varying the flow of
fluid being pumped, there being additionally provided a sensing
means having a single sensing part for detecting a condition other
than the rate of speed at which the pump is driven, the single sensing
means causing operation of both the pump fluid valve means and the
single drive motor control element.
This subclass is indented under subclass 22. Subject matter in which the means sensing the rate of speed
at which the pump is driven comprises either a secondary pump or
an electric generator which is mechanically driven by the pump drive
motor for producing a fluid or electric signal, respectively, indicative
of the rate of speed at which the pump is driven.
This subclass is indented under subclass 1. Subject matter comprising two or more pressure responsive
sensing elements which either simultaneously, successively, or selectively respond
to a change in pressure occurring in the same part of the system
(e.g., both respond to pump discharge pressure) for effecting operation
of a single motor control element.
This subclass is indented under subclass 1. Subject matter including valve means for varying the flow
of fluid being pumped, which valve means is operated by sensing
the occurrence of a condition or change of condition in the fluid
being pumped.
(1)
Note. This definition is not intended to include those devices
in which there is a single sensing means operating a valve whose
sole function is to divert a portion of the pumped fluid to cause
operation of the drive motor control means, such devices have been
considered to be merely pilot valves for the drive control means.
(2)
Note. A direct acting valve, e.g., a check valve which is
responsive only to the direction of flow in a line is not included.
However, a valve which diverts flow from one line to another, in
a branched system, even though dependent only on the direction of
flow in the lines is included.
(3)
Note. For purposes of this definition, pump fluid includes
any fluid which is caused to be moved by the pump. Therefore, a
gas vent valve for spoiling a liquid pump by allowing gas to enter
the pump is included under this definition. Also, a discriminating
valve for allowing gas, but not liquid, to be vented from a liquid
pumping system is included.
This subclass is indented under subclass 26. Subject matter in which means are provided for retarding
or delaying actuation of the valve means for the purpose of preventing
increase of pressure in the pump until a period of time after the
drive motor control means has been adjusted to cause such increase,
said valve actuation delaying or retarding means being separate
and isolated from the motor control means and having no retarding
or delaying effect thereon.
(1)
Note. Devices in which the pump fluid valve is caused to
be operated in response to the motor control element having been
adjusted to a predetermined motor controlling position are not included
under this definition in the absence of a separate retarding or
delaying means for the valve control means.
This subclass is indented under subclass 26. Subject matter in which the valve means and the control
means for the drive motor are both caused to be actuated by a sensing
means having a single sensing part for detecting the occurrence
of a condition or change of condition.
This subclass is indented under subclass 26. Subject matter in which the valve means is controlled in
response to one condition of the system and the control means for
the motor is responsive to a second condition which (1) differs
in kind from the first, e.g., pressure and flow rate, or (2) if
of the same kind, differs by the part of the system characterized
by the condition, e.g., inlet and discharge pressures of the pump.
for a sensing means responsive to pump speed for
causing operation of a pump drive motor control element and a sensing
means responsive to a condition other than pump speed for causing
operation of a pump fluid control valve.
This subclass is indented under subclass 29. Subject matter in which the fluid control means comprises
a valve in the discharge of the pump which is farther from the pump,
on the discharge side, than the sensing means for the drive controlling
means, said valve being controlled in response to the collection
of liquid in a receiver or receptacle located in the pump discharge
line.
This subclass is indented under subclass 30. Subject matter in which the drive control means is responsive
to the liquid pressure in the pump discharge line.
This subclass is indented under subclass 1. Subject matter in which the condition sensed is a change
in the temperature of either the pump or the fluid being moved by
the pump.
This subclass is indented under subclass 1. Subject matter in which the control means acts to stop operation
of the pump by stopping the drive motor in response to a change
of condition but will not again start the pump when the condition
returns to normal; the control means requiring the intervention
of a human operator to restore the pump to a running condition.
This subclass is indented under subclass 1. Subject matter in which the drive motor comprises an engine
in which fuel is burned in a chamber from which the power is directly derived
and the control means includes means which acts on the engine to
change some operating characteristic thereof.
This subclass is indented under subclass 1. Subject matter in which the drive motor is of the type which
is driven directly by wind, (e.g., a windmill), and a receptacle
is provided for receiving liquid which is to be pumped or which
has been pumped by the pump and the sensing means is responsive
to the quantity of liquid collected in the receptacle.
This subclass is indented under subclass 1. Subject matter in which there is provided a receptacle for
receiving liquid which is to be pumped or which has been pumped
by the pump and the sensing means is responsive to the quantity
of liquid in the receptacle.
for means for controlling an entrainment-type pump
(e.g., jet pump) in response to the level of pumped liquid, subclass
211.5 for means controlling a pump drive transmission (e.g., clutch,
cam, etc.) in response to the level of pumped liquid and subclass 297.5
for liquid level control which modifies the operation of an expansible
chamber pump distributor.
This subclass is indented under subclass 36. Subject matter in which the sensing means is responsive
to movement of the liquid receptacle or an auxiliary liquid receptacle
in communication therewith, said movement being caused by the weight
of the liquid collected therein.
This subclass is indented under subclass 36. Subject matter in which the sensing means comprises a device
which responds to liquid pressure changes and is either in fluid
communication with or mounted within the receptacle in a manner
such that the liquid must either reach a predetermined level before
it may pass to the pressure sensing device or exert sufficient pressure
on the sensing device to cause actuation thereof.
(1)
Note. A movable receptacle is not considered a pressure sensor
under this definition, such devices being classified in subclass
37 above.
(2)
Note. The liquid pressure may be transmitted to the sensing
means via another liquid (e.g., mercury column).
This subclass is indented under subclass 36. Subject matter in which the pump is driven by a fluid motor
and the supply of motive fluid for the fluid motor is in fluid communication
with the liquid collecting receptacle.
This subclass is indented under subclass 36. Subject matter in which the sensing means comprises a buoyant
element which floats on the surface of the liquid collected in the
receptacle.
This subclass is indented under subclass 40. Subject matter in which the pump is driven by a fluid motor
and the control means acts to control the flow of fluid to said
motor.
for a single motor control element which is operated
in response to means sensing diverse conditions, one of said diverse
conditions being the speed of the pump.
This subclass is indented under subclass 1. Subject matter in which the sensing means is responsive
to variations in the rate of flow of the fluid flowing to or from
the pump.
This subclass is indented under subclass 1. Subject matter in which the motor is of the type having
a working member (e.g., armature) which is motivated by electricity
or a magnetic field.
(1)
Note. Collected in this subclass are patents directed to
system condition responsive control of drive motors of the type commonly
referred to as magnetic or electromagnetic clutches.
This subclass is indented under subclass 44.1. Apparatus wherein the electric drive motor comprises a sensing
means where an operating characteristic changes in response to a
change in an electrical current drawn by the motor or a change in
a voltage across the motor or a change in a phase shift of the motor.
This subclass is indented under subclass 44.1. Apparatus having a sensing means responsive to variation
in pressure present in the fluid flowing to or out from the pump
and which causes operation of the control means to alter the operation
of the motor.
(1)
Note. The fluid pressure may be transmitted to the sensing
means via another liquid (e.g., mercury column).
This subclass is indented under subclass 44.2. Apparatus wherein the motor comprises an electrical contact
having an opened position and a closed position and the contact
remains in the opened position as long as the sensed pressure of
the fluid remains below a predetermined value.
This subclass is indented under subclass 44.2. Apparatus wherein the motor comprises an electrical circuit
and the sensing means includes a device which contains mercury which
is motivated by the variations in the fluid pressure; the said motivation
triggers the electrical circuit of the motor to close or open.
This subclass is indented under subclass 44.2. Apparatus wherein the motor comprises an electrical circuit
and the sensing means includes a dial indicator which has a rotary movement
responsive to the fluid pressure and a manually adjustable set point
which causes the electrical circuit to open or close when the positions
of the indicator and manual set point are properly aligned.
This subclass is indented under subclass 44.2. Apparatus wherein the motor comprises an electrical circuit
and the sensing means includes a flexible structure which is capable
of expanding to increase the volumetric capacity thereof, said structure
comprising (a) a tube of flexible material having a circumferentially corrugated
or pleated wall, (b) at least four plates, each plate having a central
opening therein defining an edge inwardly of the outer peripheral
edge thereof, said plates being arranged in superposed relation
with adjacent plates secured along their inner and outer edges alternately,
or (c) a pair of rigid platelike members pivoted together along
a portion of their peripheral edges, the remaining peripheral edge
portion of said plates being joined together by a flexible member
which is pleated in some position of relative pivotal movement of
the platelike members.
This subclass is indented under subclass 44.2. Apparatus wherein the motor comprises an electrical circuit
and the sensing means includes a plunger or a solid disk which fits snugly
into a cylinder and wherein the plunger or the disk moves when subjected
to the fluid pressure variation in the cylinder causing the electrical
circuit of the motor to close or open.
This subclass is indented under subclass 44.2. Apparatus wherein the motor comprises an electrical circuit
and the sensing means includes a relatively thin membranelike member
having a peripheral edge portion, said member being adapted to be
associated with a surrounding or encompassing tubular rigid structure
to extend transversely thereof to form a closing wall for said tubular
structure, the outer peripheral edge of said membrane being in sealing
relationship with the encompassing wall of said tubular structure;
said member moves in response to the fluid pressure variation causing
the electrical circuit of the motor to close or open.
(1)
Note. The membranelike member need not span the entire space
within the encompassing wall of the tubular member, but may be in
the form of a ring or frustum having the inner peripheral edge thereof
in sealing engagement with a rigid element movable relative to and coaxial
with the encompassing tubular member.
Subject matter under subclasses 44.1+ in which the
motor is electrically operated and the motor or electric supply
circuit therefor includes an electrical component (e.g., resistance
element, starting winding, etc.) which is either (1) adjustable
to change its electrical value or characteristic or (2) capable
of being included in or shunted out of the main motor circuit; and
in which the control means acts to control the adjustment or shunting
of the component in response to the sensed condition.
This subclass is indented under subclass 1. Subject matter in which the motor drive means for the pump
is of the type which includes a movable working member which is
motivated by a fluid and the control means comprises means for controlling
the flow of motive fluid to or from the motor in response to the
sensing means.
for a single fluid motor control element which is
operated in response to means sensing diverse conditions, one of
said diverse conditions being a motive fluid condition.
This subclass is indented under subclass 46. Subject matter in which the motor is of the type in which
the drive element rotates about an axis and derives its power by
the fluid impacting against the drive element.
This subclass is indented under the class definition. Subject matter in which (1) the fluid is pumped by or the
pumping effect relies upon the direct action thereon of electrical
means or a magnetic field, or (2) the fluid is "pumped" or
trapped by means of a getter.
(1)
Note. This is the residual home for the creation of a vacuum
in an enclosed space by means of a gettering action as defined in
(2) Note below. This and indented subclasses include the combination
of the chamber to be evacuated and the gettering means. It also
includes significant claimed containers holding getter material
for disposition in a chamber to be evacuated.
(2)
Note. A getter is a material which, when placed in an enclosed
space, reduces the gas or vapor content of the space either by a
chemical or physical action.
Specialized Metallurgical Processes, Compositions
for Use Therein, Consolidated Metal Powder Compositions, and Loose
Metal Particulate Mixtures,
subclasses 255+ for a loose metal particle composition.
Gas Separation: Apparatus,
subclasses 108+ for solid sorbent apparatus for separating vaporous
or gaseous constituents. The subject matter classified in Class
96 may be intended to create a vacuum in an enclosed space, but
must selectively separate one constituent from another. Thus, Class
96 does not take solid sorbent apparatus or any other means intended
to sorb all of the gas or vapor constituents in a chamber.
Chemistry: Electrical and Wave Energy,
subclasses 192.1+ for processes for coating or forming an article
by cathode sputtering and subclass 298.01 for cathode sputtering
apparatus to coat or form an article.
Compositions,
subclasses 181.1+ for getters and gas or vapor generating materials,
per se, and also for such materials claimed as being in a container,
but where no structure of the container is claimed.
Electric Lamp and Discharge Devices,
subclasses 545 through 566for electric lamps and space discharge devices
which include a getter or gas or vapor generating material as a
part thereof.
Conveyors: Fluid Current, appropriate subclasses for systems which transport solids
by means of a fluid current, and which include a pump for generating
the fluid current. See particularly
subclasses 10+ for control circuits for pump drives, which are responsive
to a sensed condition, and subclasses 45 and 46+ for subject matter
relating to the pumping and transportation of slurries.
Electric Lamp or Space Discharge Component or
Device Manufacturing,
subclasses 38+ , 53+ and 73 for methods and apparatus
for evacuating electric lamp and space discharge devices and including
some step or means limited to the manufacture or repair of electric
lamp or space discharge device.
This subclass is indented under subclass 48. Subject matter in which the pumping action is effected by
or relies upon the ionization of the pumped fluid by the action
of electrical means and including a getter material for the ionized fluid
or an additional pump of a different type (e.g., mechanical, diffusion,
etc.).
(1)
Note. The line between this Class 417 and Classes 313, Electric
Lamp and Discharge Devices and 315, Electric Lamp and Discharge
Devices: Systems, in the field of ionic pumps generally falls into two
categories as follows: (a) SPACE DISCHARGE AND GETTERING - The distinction
between Class 417 and Classes 313 and 315 in the field of creation
of a high vacuum involving electrical space discharge with gettering
is one of art. Thus, a patent to a space discharge device combined
with gettering means (the getter may be an electrode of the space
discharge device) in which the sole disclosure is to act as a vacuum pump
(i.e., the only disclosed use of the space discharge device is to
ionize fluid to be trapped by the getter); or one in which all of
the claims are limited to a pumping or vacuum creating function will
be classified as an original in Class 417. Conversely, those in
which the disclosure is not limited to a vacuum pump function and
having a claim not limited to pumping will be classified in Class 313
or Class 315 if otherwise appropriate; (b) SPACE DISCHARGE WITHOUT
GETTERING - Those devices in which a fluid or fluid stream is ionized by
a space discharge device and do not include gettering of the ionized
fluid will generally be classified in Class 313 or 315 even though
the sole disclosure relates to pumping or vacuum formation. However,
if in addition to the ionization means an additional pump of the
nonionization type is claimed the patent will be classified in Class
417.
This subclass is indented under subclass 48. Subject matter in which the pumped fluid is electrically
conductive, a current being caused to flow in the fluid while being
subjected to a magnetic field, the result being a pumping action
on the fluid.
for the "pumping" of fluid or
formation of a vacuum by ionizing the fluid to be pumped and subjecting
the ionized fluid to a magnetic field and see the notes thereto
for similar art classified elsewhere.
This subclass is indented under subclass 48. Subject matter provided with getter means and in which means
are provided to elevate the temperature of the getter, to change
the state of the getter from a solid to a vapor or to renew the
getter to perform its gettering function after having already operated
as a getter.
This subclass is indented under the class definition. Subject matter in which the fluid to be pumped is isolated
in a chamber, heated to expel a portion thereof from the chamber,
this expelled portion constituting the pumped fluid, and the fluid
remaining in the chamber then cooled so as to contract and establish
a reduced pressure in the chamber to draw in a new charge of fluid.
This subclass is indented under subclass 53. Processes in which one fluid is pumped or motivated by direct
contact or entrainment with another fluid, the motive fluid before
contact or entrainment being separate from the pump fluid.
This subclass is indented under subclass 54. Processes in which the composition of the motive fluid is
specified in a claim.
(1)
Note. The following are excluded under this definition as
specific motive fluid: water, air, steam, mercury. Oil is also excluded
under this definition unless the composition is more specifically
recited than mere "oil".
This subclass is indented under the class definition. Apparatus in which the pump has a piston which reciprocates
within an elongated cylinder of uniform cross-sectional dimensions which
is adapted to be positioned within a drilled well, said piston serving
to separate the cylinder into respective motor and pump chambers,
means providing either a restricted or a controlled flow path which
provides communication between the pump and motor chambers (i.e.,
between opposite sides of the piston), the induction of at least
a portion of the fluid to be pumped flowing serially through the
motor chamber, said restricted or controlled flow path, and thence
into said pump chamber; motive fluid being subsequently applied
to said motor chamber to drive said piston on an eduction stroke.
(1)
Note. The motive fluid under this definition may be derived
either from the well itself or from an external source.
(2)
Note. This subclass and those indented hereunder are intended
to include the subcombination of a valved or radially expansible
piston for performing a valving function which is disclosed as having utility
in the apparatus defined herein.
This subclass is indented under subclass 56. Apparatus in which there is provided means for controlling
the flow of liquid from the pump chamber, said flow controlling
means being operated in response to either (1) the sensing of a
condition or change in condition or (2) the arrival of the piston
at a predetermined position in the cylinder.
(1)
Note. For purposes of this definition, a mere check valve
in the eduction flow conduit which opens in the direction of pump
fluid eduction is not considered to be condition responsive control.
Also, the mere passing of the eduction port by the free piston is
not considered to be position responsive control of the type herein
provided for.
This subclass is indented under subclass 56. Apparatus in which there is provided valve means for controlling
the inlet of motive fluid to the motor chamber, said valve means
comprising mechanical elements which are relatively moved in response
to either (1) the sensing of a condition or change in condition
or (2) the arrival of the piston at a predetermined position in
the cylinder.
(1)
Note. For purposes of this definition, a mere check valve
positioned within the motive fluid supply line which opens in the
direction of motive fluid supply to the motor chamber is not considered
to be condition responsive control.
(2)
Note. Supply of motive fluid which is controlled by well
liquid level in which the well liquid serves to directly cover or uncover
motor chamber supply ports is excluded under this definition. However,
a piston controlled cylinder port which is subsequently opened to
allow the supply additional motive fluid is included hereunder.
This subclass is indented under subclass 56. Apparatus in which at least a portion of the piston is capable
of expansion and contraction in a direction perpendicular to its
axis of reciprocation to thereby provide a valving action with the
chamber in which it reciprocates to allow or interrupt fluid communication
between the pump and motor chambers.
This subclass is indented under subclass 56. Apparatus in which the piston has a fluid flow passage formed
therein which extends to opposite ends of said piston and valve
means carried by the piston for controlling said passage, said valve
means being positively mechanically moved by engagement of said
valve (or an element associated therewith) with a stationary chamber
portion.
This subclass is indented under the class definition. Apparatus in which the pump unit or the intake or discharge
line thereof is buoyant or buoyantly supported so as to be capable
of floating on a body of liquid, the pump not being operated by
the rise and fall or flow of the liquid on which it or its intake
or discharge line floats.
ALTERNATE SERIES OR PARALLEL OPERATION OF PLURAL PUMPS
This subclass is indented under the class definition. Apparatus comprising two pumping members or units, and means
being provided by which the pumped fluid is successively acted upon
by said members or units, and alternatively the members or units
are arranged in separate or branched flow lines so as to take from
a common or separate sources and deliver to a common or separate
outlets.
This subclass is indented under the class definition. Apparatus having (1) signals, indicators, registers, recorders,
or gauges for indicating a condition of the pump or pumped fluid
or the position of a pump part such as a piston, control member,
valve, etc., such devices comprising relatively movable, changeable
or audible information giving parts, or (2) transparent viewing
means whereby the pump operation or the condition of some part thereof
may be observed.
(1)
Note. For classification under part (1) of this definition
there must be either an indicia or an audible or visual signal or
a means whose sole purpose is to indicate a condition of the device.
Relative to indicia there must be graduations or markings disclosed.
Where it is indicated that the mere position of a pump part is
indicative of a condition of the pump (e.g., valve handle position
indicated direction of fluid flow) classification under the definition
does not result unless some cooperating indicia are included.
GAS PRESSURE EXCHANGE USING ROTARY CELLULAR CONVEYOR
This subclass is indented under the class definition. Apparatus having a cellular member rotatable about an axis
with means to isolate therein and from its source a volume of gas
to be pumped, transfer said volume to a position where a gaseous
motive fluid may be admitted into said cellular member for the purpose
of increasing the pressure of said volume while an interface is
maintained between the two gases, and then permit the pumped gas
and the motive gas to be exited from said cellular member each into
a separate flow path.
ONE FLUID PUMPED BY CONTACT OR ENTRAINMENT WITH ANOTHER
This subclass is indented under the class definition. Apparatus in which one fluid is pumped or motivated by direct
contact or entrainment with another fluid, the motive fluid before
contact or entrainment being separate from the pump fluid.
(1)
Note. This definition does not include mere pulsation dampeners
or accumulators, i.e., a trapped, confined compressible fluid which
directly receives energy from another fluid and returns the energy to
the other fluid from which it was received.
for gas pressure exchange devices using a rotary
cellular member to transfer a gas to be pumped to a position where
its pressure may be increased by being contacted directly by a gaseous
motive fluid.
This subclass is indented under subclass 65. Apparatus in which a driven element is provided to continuously
and unidirectionally move the motive fluid either as slugs or a
complete ring about an axis at a relatively high rate of speed,
said motive fluid directly contacting and imparting energy to the
fluid being pumped while in said movement about an axis.
This subclass is indented under subclass 66. Apparatus in which the driven element is provided with a
passage passing through the axis of rotation of the element at the
point where it is supported for rotation and said passage is described
as conveying motive fluid or fluid being pumped.
This subclass is indented under subclass 66. Apparatus in which the motive fluid is rotated by the driven
member at such a speed and in such a manner as to form a peripheral
ring around the driven member within a surrounding casing.
This subclass is indented under subclass 66. Apparatus in which a passage to supply motive fluid to be
rotated by the driven element is provided, said passage being closely
related to the axially remote portion of the rotary element.
This subclass is indented under subclass 66. Apparatus in which a passage is provided to bring fluid
to be pumped into contact with motive fluid being moved about an
axis, said passage being closely related to axis of the driven element.
This subclass is indented under subclass 71. Apparatus in which an outlet passage for pumped fluid is
provided, said passage being closely related to the axially remote
portion of the rotary element.
This subclass is indented under subclass 65. Apparatus comprising a pumping chamber into which pump fluid
is alternately introduced and expelled, the pumping being effected
by burning of motive fluid and application of the products of combustion
to the chamber.
This subclass is indented under subclass 73. Apparatus having a separate ignition means to ignite the
motive fluid, said ignition means being responsive to a condition
of the pump fluid.
This subclass is indented under subclass 73. Apparatus including means to return a portion of the pump
fluid to the pump chamber and utilize the momentum thereof to effect
expulsion of a previously burned charge of motive fluid, and compress
the next incoming charge of motive fluid.
This subclass is indented under subclass 65. Apparatus including a jet pump and an additional pump which
includes a mechanical impelling member (e.g., piston, rotor, etc.)
to generate the motive fluid supplied to the jet pump.
(1)
Note. For the definition of a jet pump see this class subclass
151.
(2)
Note. The jet pump may have the sole disclosed use of priming
the motive fluid generating pump.
This subclass is indented under subclass 76. Apparatus in which the motive fluid and the pumped fluid
are of different states (i.e., liquid and gas) and after entrainment
the two are separated and the motive fluid fed back to the entrainment
area as recirculated motive fluid.
(1)
Note. This definition excludes a jet pump which primes the
other pump of air but then acts to pump liquid when the other pump
is primed.
This subclass is indented under subclass 76. Apparatus provided with a rotary impeller which acts to
project motive fluid therefrom, the exit of the impeller acting
as the motive fluid nozzle and being disposed in the area of entrainment.
(1)
Note. This definition excludes an impeller whose discharge
is confined by a passage which acts as the motive fluid nozzle.
See subclass 84.
This subclass is indented under subclass 76. Apparatus in which at least a portion of the output of the
jet pump is supplied back to the intake of the motive fluid generating
pump.
This subclass is indented under subclass 79. Apparatus in which the motive fluid generating pump comprises
a pumping member which has unidirectional rotary motion about a
fixed axis and acts to pump fluid by a centrifugal, centripetal
or screw effect.
This subclass is indented under subclass 80. Apparatus in which the rotary nonexpansible chamber-type
pump includes a plurality of rotary pumping members at least a portion
of the pumped fluid passing successively from one pumping member
to the next.
This subclass is indented under subclass 80. Apparatus in which the jet pump may be selectively placed
in different positions with respect to the rotary pump, usually
for adapting the apparatus to operate with a shallow well with the
jet proximate the rotary pumping member or with a deep well with
the jet positioned in the well remote from the rotary pumping member.
This subclass is indented under subclass 80. Apparatus in which the jet pump is located in close physical
proximity to the rotary pumping member of the diverse pump and is
contained within the housing structure (including inlet and outlet
connections) thereof.
for combined jet and rotary nonexpansible chamber-type
pumps in which the jet may be selectively located in the rotary
pump casing or remote therefrom.
This subclass is indented under subclass 76. Apparatus in which the motive fluid generating pump comprises
a pumping member which has unidirectional rotary motion about a
fixed axis and acts to pump fluid by a centrifugal, centripetal
or screw effect.
This subclass is indented under subclass 65. Apparatus comprising a plurality of discrete pumps of different
basic types.
(1)
Note. This definition does not include a plurality of pumps
of different basic types if one is a mere auxiliary or ancillary
of the other (e.g., lubricant or cooling pump for main pump). However,
a pump whose sole disclosed function may be to prime the other pump
is not considered a mere auxiliary and this combination is included
in this definition.
(2)
Note. This definition includes as different basic-type pumps
which may both be of the fluid contact or entrainment types such
as, for example, jet pump and aerated column, pneumatic displacement and
jet, etc.
This subclass is indented under subclass 85. Apparatus in which one of the pumps is of the type having
a chamber or container in which liquid to be pumped is collected
and means to apply gas pressure from an external source to the surface
of the liquid in said chamber or container to expel the liquid therefrom.
(1)
Note. The gas pressure may be merely atmospheric air admitted
to the chamber which has been filled by applying vacuum thereto.
This subclass is indented under subclass 87. Apparatus in which the diverse pump is driven by an internal
combustion engine or fluid motor and the exhaust motive fluid or
combustion products from the motor are directed to the fluid jet
producing means of the jet pump to act as the motive fluid therefor.
for an aerated column pump and a diverse pump which
is driven by an internal combustion engine or fluid motor the exhaust
of which provides the aeration fluid.
This subclass is indented under subclass 87. Apparatus in which another of the pumps comprises a pumping
member which has unidirectional rotary motion about a fixed axis
and acts to pump fluid by centrifugal, centripetal or screw effect.
This subclass is indented under subclass 90. Apparatus in which the diverse pump is driven by an internal
combustion engine or fluid motor, the exhaust motive fluid or combustion products
from the motor constituting the gas which is injected into the liquid
column.
for a jet pump in which the jet motive fluid is
the exhaust from an internal combustion engine or fluid motor which
drives a pump different from the jet pump.
This subclass is indented under subclass 65. Apparatus in which a fluid may be pumped by the direct action
thereon of a compressing chamber or container and a liquid forming
part of said compressing chamber or container, the body of liquid
in effect constituting a piston in said container whereby relative
movement between said liquid and said container varies the volume
of a space in said chamber or container to pump the fluid.
This subclass is indented under subclass 92. Apparatus in which at least one wall of said chamber means
is moved relative to a surface of said body of liquid to change
the volume of said chamber and thus pressurize the fluid confined
therein.
This subclass is indented under subclass 93. Apparatus in which said chamber has a wall means having
a spiral configuration which extends along an axis, and upon rotation
about said axis said wall means is caused to move relative to said
liquid surface, move said fluid axially and change the pressure
of said fluid to be pumped which is confined in said chamber.
This subclass is indented under subclass 93. Apparatus in which the movement of the chamber operates
a cyclically operated valve or other cyclic control means for flow
of the body of liquid to or from the chamber.
This subclass is indented under subclass 93. Apparatus in which the body of liquid is completely supported
by the structure which forms the chamber, said structure being moved
to cause said fluid to be pumped.
This subclass is indented under subclass 93. Apparatus in which a plurality of chamber means are provided,
said chambers being moved relative to one another.
This subclass is indented under subclass 92. Apparatus in which the body of liquid is moved by the natural
tide or wave action of a large body of water in its natural situation.
This subclass is indented under subclass 92. Apparatus in which relative height of the surface of the
body of liquid in said chamber cyclically operates a valve or other
control means to effect cyclic pumping.
This subclass is indented under subclass 92. Apparatus in which the body of liquid is set in motion and
the inertia of the body of liquid (i.e., the tendency to remain
in motion or at rest) being effective to produce the pumping action.
This subclass is indented under subclass 65. Apparatus in which gaseous pumping fluid is reduced to the
liquid state with a resultant pressure change, which change causes
the pumped fluid to be motivated.
This subclass is indented under subclass 105. Apparatus comprising plural pumping chambers which are so
interrelated as to produce alternate or successive pumping from
the chambers.
This subclass is indented under subclass 105. Apparatus with means responsive to a condition of the pumping
or pumped fluid, said means controlling the flow of the pumping
or pumped fluid.
This subclass is indented under subclass 65. Apparatus comprising a vertical column into which the liquid
to be pumped enters, with means to inject a gaseous motive fluid
below the level of the liquid accumulated therein which effects
a mixed mass of reduced specific gravity to elevate said liquid
with said gas.
for means for pumping a fluid which employs a means
to aerate the fluid to reduce its specific gravity in combination
with another kind of pump means (e.g., jet, etc.).
for jet pumps which employ a motive fluid moving
at a greater velocity than the fluid to be pumped thereby creating
a vacuum or reduced pressure area to motivate the pumped fluid and wherein
the motive fluid may subsequently become entrained with the pumped
fluid.
This subclass is indented under subclass 108. Apparatus wherein said injection means comprises valve means
which opens and closes to control the gaseous motive fluid injected.
This subclass is indented under subclass 109. Apparatus having (1) fluid impinging means in the flow path
of the liquid to be pumped, to be acted upon thereby, or (2), means
responsive to the velocity of the moving liquid being pumped comprising
a restricted passageway.
This subclass is indented under subclass 109. Apparatus wherein said valve means comprises plural valves
mounted at vertically spaced levels along said vertical column,
and having common mechanical or electrical actuating means to actuate
or permit the actuation of the valves in a particular sequence.
This subclass is indented under subclass 109. Apparatus wherein said valve means is actuated by an associated
flexible diaphragm or bellows-type sensing element which is responsive
to the pressure of either the liquid to be pumped, or the gaseous
pumping fluid.
This subclass is indented under subclass 112. Apparatus wherein said valve means comprises a pilot valve
and a main valve, said pilot valve controlling actuating fluid to
the main valve to control actuation thereof, and said sensing element
controlling the actuation of said pilot valve.
This subclass is indented under subclass 109. Apparatus wherein said valve means comprises a pilot valve
and a main valve, said main valve controlling the gaseous motive
fluid injection and said pilot valve controlling actuating fluid to
the main valve to control actuation thereof.
This subclass is indented under subclass 109. Apparatus wherein said valve means is actuated in response
to the attainment of an absolute rate of flow, pressure or other
absolute condition of the motive fluid to control the flow of motive
fluid injected into the pumped fluid.
for devices having unbiased check valves in the
gaseous motive fluid line which merely acts to prevent the flow of
the liquid to be pumped back into the motive fluid line and which,
by their nature, permit flow of motive fluid to flow therethrough
whenever the pressure of the motive fluid exceeds that of the pumped
fluid.
for those devices having motive fluid injection
control valves which are controlled in response to the flow of the
pumped fluid and which may also be influenced by a motive fluid
condition.
for those devices having motive fluid injection
control valves which are actuated to permit the flow of motive fluid
into the pumped fluid in response to a static head build up of pumped
fluid.
This subclass is indented under subclass 109. Apparatus comprising float means or other nonpressure sensitive
means responsive to the level of liquid accumulated, which float
means controls actuation of said valve means.
This subclass is indented under subclass 109. Apparatus wherein said valve means comprises a valve member,
said valve member being biased closed by weight, spring, or other means,
and having means exposed to the accumulation of liquid within said
vertical column, which means, in response to the pressure of the accumulated
liquid, opens or tends to open said valve member.
This subclass is indented under subclass 65. Apparatus in which the fluid which is to be pumped is a
liquid, and the motive fluid is a gas, comprising a pumping chamber,
a liquid inlet and a liquid outlet through which the liquid is pumped
into and out of said chamber, means for supplying and exhausting
the gas to effect the pumping of said liquid, and further having
(1) pump means to supply or exhaust the gas or (2), liquid level
float means to effect control of the gas or liquid entering or leaving said
chamber or (3) means to effect repetitive or cyclic pumping into
and from said chamber upon initiation of the pumping action.
(1)
Note. The pumps disclosed in the patents contained herein
operate on a differential pressure principle, i.e., by withdrawing
the gaseous motive fluid which is in contact with a portion of a confined
liquid to be pumped, a higher pressure, e.g., atmospheric, acting
upon another portion of said confined liquid effects movement and
thus pumping thereof.
(2)
Note. Devices are included under this definition wherein
the pumping chamber is provided with a single means by which both
the liquid and the gas are exhausted.
(3)
Note. Devices are classified under this definition which
have pumping chambers which are submerged in the liquid to be pumped
whereby the liquid is introduced into the chamber by gravity.
This subclass is indented under subclass 118. Apparatus having a pump means to supply or exhaust the gas,
said pump means comprising means to utilize a body of liquid, which
body of liquid is in contact with the gas, to compress or expand
said gas.
This subclass is indented under subclass 118. Apparatus having pump means for said motive fluid, and including
condition responsive control means to directly control said pump
means.
This subclass is indented under subclass 118. Apparatus comprising plural pumping chambers where the liquid
output of one chamber is the liquid input for another.
This subclass is indented under subclass 118. Apparatus comprising plural pumping chambers interrelated
by means to effect alternate pumping from said chambers.
This subclass is indented under subclass 122. Apparatus wherein said interrelated means is responsive
to a condition of the motive fluid or the fluid which is pumped
in a first chamber, to control the supplying or exhausting of motive fluid
to a second chamber.
This subclass is indented under subclass 123. Apparatus wherein the condition is the weight of the fluid
which is pumped which has accumulated in the first chamber.
for devices having a movably mounted means adapted
to receive the fluid which is pumped and adapted to be moved in
response to a quantity of fluid received to control the pumping operation.
This subclass is indented under subclass 118. Apparatus having means buoyed by the fluid which is pumped
and responsive to change in level thereof to control flow of the
fluid which is pumped or of the motive fluid into or from the pumping
chamber.
This subclass is indented under subclass 126. Apparatus wherein the flow of the fluid which is pumped
or the flow of the motive fluid is controlled by a valve means which
is controlled by the buoyed means through a pilot valve means.
This subclass is indented under subclass 126. Apparatus wherein the flow to or from the pumping chamber
of the motive fluid or of the fluid which is pumped is controlled
by said buoyed means through an electrical actuating means.
This subclass is indented under subclass 126. Apparatus wherein the admission of the motive fluid to the
pumping chamber is controlled by the buoyed means.
(1)
Note. Apparatus having means to control the admission of
atmospheric air to a pumping chamber adapted to be placed under
a vacuum are classified in this and indented subclasses.
This subclass is indented under subclass 130. Apparatus wherein said buoyed means also controls the exhausting
of the motive fluid from the pumping chamber.
(1)
Note. Apparatus having means to control the flow of working
fluid from the pumping chamber to a vacuum source are classified
in this and indented subclasses.
This subclass is indented under subclass 131. Apparatus wherein the float means initiates the operation
of an over center (e.g., spring, weight, etc.) valve actuator to
control the flow of motive fluid to and from the pumping chamber.
This subclass is indented under subclass 126. Apparatus wherein the flow of motive fluid from the pumping
chamber is controlled by the buoyant means.
(1)
Note. Devices having means to control the flow of motive
fluid from the pumping chamber to the vacuum source are classified
in this and indented subclasses.
This subclass is indented under subclass 134. Apparatus wherein said buoyant means further controls the
flow of fluid which is pumped from the pumping chamber.
This subclass is indented under subclass 134. Apparatus wherein said buoyant means further controls the
flow of fluid which is pumped into the pumping chamber.
This subclass is indented under subclass 118. Apparatus wherein the pumping chamber alternately admits
and ejects a fluid which is pumped by controlling flow of the pumped fluid
or motive fluid by a mechanism motivated (1) in response to an ambient
or external pumped fluid or motive fluid condition or (2) by the
pumped fluid, motive fluid or other means.
This subclass is indented under subclass 137. Apparatus wherein said means for admitting or ejecting the
fluid which is pumped to and from the pumping chamber comprises
liquid level sensing means at predetermined liquid level(s).
This subclass is indented under subclass 137. Apparatus wherein the mechanism, by which the fluid which
is pumped is admitted to or ejected from the pump chamber, is motivated in
response to a condition of the pumped fluid.
This subclass is indented under subclass 139. Apparatus having a movably mounted means adapted to receive
the fluid which is pumped and adapted to move in response to a quantity of
fluid received to control the mechanism by which the fluid which
is pumped is admitted to or ejected from the pump chamber.
(1)
Note. The pump chamber may be the movably mounted means.
for devices having plural interrelated pumping chambers
which include a means to sense the weight received of fluid which
is pumped to control the pumping operation of the chambers.
This subclass is indented under subclass 139. Apparatus wherein the mechanism, by which the fluid which
is pumped is admitted to or ejected from the pumping chamber, is
controlled in response to the rate of flow of the fluid which is
pumped.
This subclass is indented under subclass 139. Apparatus wherein the mechanism, by which the fluid which
is pumped is admitted to or ejected from the pumping chamber, is
controlled in response to the pressure of the fluid which is pumped.
(1)
Note. This subclass includes those devices which have means
which are described as sensing the "weight" of
the pumped fluid but which, in fact, sense pumped fluid pressure
at a given point in the pump chamber. However, a device which includes
a container into which pumped fluid is placed and which measures
a predetermined weight of fluid therein to control the pumping operation is
classified in subclass 139.
This subclass is indented under subclass 137. Apparatus wherein the alternate admission and ejection of
the fluid which is pumped into and from the pump chamber results
from the alternate admission and withdrawal of the motive fluid
to or from the pump chamber said motive fluid being controlled by
valve means responsive to the motive fluid pressure.
(1)
Note. The pressure responsive means does not include a mere
pressure responsive check valve in the motive fluid inlet or outlet
of the pumping chamber.
This subclass is indented under subclass 137. Apparatus in which said means for effecting the admission
and ejection of the pumped fluid from the pump chamber is a valve
means for supplying or exhausting the gaseous pumping fluid to said
chamber and having additional means correlating control of said
valve means with the operation of a means generating said motive
fluid.
This subclass is indented under subclass 137. Apparatus wherein said means for effecting the admission
and ejection of the pumped fluid from the pump chamber comprises
valve means which correlates the supplying and exhausting of motive
fluid to and from the pumping chamber.
This subclass is indented under subclass 118. Apparatus having the pump means, (i.e., vacuum generator),
to withdraw the gaseous motive fluid from the pumping chamber.
This subclass is indented under subclass 148. Apparatus including a pump means (i.e., pressure generator),
to supply pumping fluid to said pumping chamber.
This subclass is indented under subclass 65. Apparatus comprising a vertically disposed tube through
which motive fluid drops freely under the influence of gravity,
contact with or entrainment of the pumped fluid being made in the
tube.
This subclass is indented under subclass 65. Apparatus in which motive and pumped fluids are brought
into intimate contact in an enclosed flow path, the motive fluid
having a higher velocity than the pumped fluid and imparting energy
to the pumped fluid by the action of entrainment and frictional
contact.
Fluid Handling,
subclasses 888+ for systems having multiple inlets and a single
outlet with means to promote mixing or combining of plural diverse fluids
and subclass 842, for a "turbulence amplifier" having
similar structure. If the system is disclosed as one of the fluids
acting to pump the other classification is in this class (417).
Gas and Liquid Contact Apparatus,
subclasses 76+ for injector-type gas and liquid contact apparatus
where there is a mutual exchange of properties between the fluids.
This subclass is indented under subclass 151. Apparatus in which the pump is adapted to be connected to
or enclosed within a space which is to be evacuated to a high vacuum,
the motive fluid being in the form of a vapor which acts to remove
fluid diffusing out of said space, the motive fluid acting to remove
the fluid by entrainment and condensation.
(1)
Note. The vapor is generally oil or mercury which is generated
in a boiler.
This subclass is indented under subclass 152. Apparatus in which means are provided to cool the pump,
usually the outer walls or nozzle thereof or heat insulation means
are provided to prevent heat transfer from the motive fluid to the
zone being evacuated.
This subclass is indented under subclass 152. Apparatus in which there is a vertically disposed conduit
which the motive fluid vapor flows upwardly from a vapor generator
(i.e., boiler) the motive fluid being reversed and directed transversely
and downwardly from the conduit into the entrainment area, the motive fluid
upon condensation flowing back to the generator.
This subclass is indented under subclass 151. Apparatus in which the combining tube of the jet pump is
a flue or stack of a furnace and the jet acts to increase the draft
effect of the flue or stack.
(1)
Note. Where the operation of the device necessarily involves
a treatment of the flue gases, such as the entrainment of air or
air and steam to effect combustion of unconsumed particles of fuel,
or where any treatment of the fuel gases not merely a pumping effect
is involved, or where the combination embraces elements of a furnace
mechanism of greater scope than herein defined, the device is classified
in appropriate subclasses of Class 110, Furnaces; see especially
subclasses 150, 160, and indented subclass. Compare Class 261,
Gas and Liquid Contact Apparatus, subclass 24, and indented subclasses.
This subclass is indented under subclass 155. Apparatus in which the pumped fluid contains sparks or cinders
and means are provided to separate out or reduce the size of the
sparks or cinders prior to discharge from the pump.
Gas Separation: Apparatus, appropriate subclasses, for spark arresters, per se.
When a spark arrester is combined with a jet pump it is considered
to be a perfecting feature of the pump and is classified in Class
417.
This subclass is indented under subclass 155. Apparatus including means for controlling the operation
of the jet pump or the flow of motive or pumped fluid to or from
the jet pump by means of a valve or throttling action.
This subclass is indented under subclass 151. Apparatus provided with means to remove accumulated foreign
material from the jet pump or its connected flow lines by means
of applying motive fluid to the pump by a route other than its normal
flow path to the entrainment area or by means of a fluid other than
the motive or pumped fluid which is applied to the pump.
This subclass is indented under subclass 151. Apparatus in which the pumped fluid flows toward the entrainment
area along a given path and motive fluid is projected radially of
the given path in the form of a disc-like sheet, the pumped fluid
being entrained by the disc-like sheet and during entrainment flowing
outwardly from the given path.
This subclass is indented under subclass 151. Apparatus having a valved waste passage to conduct pumped
fluid which has been entrained away from the device and is also
provided with a valve to control flow of motive fluid to the jet,
there being means provided which upon actuation of one of the valves causes
or prevents actuation of the other.
This subclass is indented under subclass 151. Apparatus in which a first stream of motive fluid acts to
entrain pumped fluid and then a second stream of motive fluid from
the same or different sources as the first acts to entrain the combined
motive and pumped fluid from the first entrainment.
This subclass is indented under subclass 163. Apparatus in which heat exchange apparatus is provided to
remove heat from the combined motive and pumped fluid from the first
entrainment before said fluid is acted upon by the second motive
fluid stream.
This subclass is indented under subclass 163. Apparatus in which both the first and second streams of
motive fluid are provided with separate and distinct valves to individually
control the flow thereof.
(1)
Note. The separate and distinct valves may be unitary with
one another so long as there are distinct valve portions which control
each of the motive fluid flow paths.
This subclass is indented under subclass 165. Apparatus in which the separate and distinct valves are
so related that upon actuation first one valve controls its motive
fluid flow path and then the other controls its motive fluid flow path
in sequence.
This subclass is indented under subclass 163. Apparatus in which one of the motive fluid streams is projected
centrally so as to entrain an annular stream of pumped fluid outwardly thereof
and another motive fluid stream is in the form of an annulus so
as to entrain a stream of pumped fluid in the center of the annulus.
This subclass is indented under subclass 163. Apparatus in which one of the motive fluid streams is confined
to a conduit terminating in a nozzle and the other motive fluid
stream is directed around the circumference of the conduit at the
point at which it entrains pumped fluid.
This subclass is indented under subclass 163. Apparatus in which the motive fluid streams in their flow
to the entrainment nozzle are parallel and spaced laterally from
one another.
This subclass is indented under subclass 163. Apparatus in which the first and second motive fluid flows
at the points of entrainment are substantially in line with one
another.
(1)
Note. The motive fluid streams may be of annular form with
the annuli having a common central axis.
This subclass is indented under subclass 151. Apparatus in which the motive fluid is introduced in a plane
at right angles to and tangentially of the inflow of pumped fluid establishing
a vortex-type entrainment within or without the rotating motive
fluid.
This subclass is indented under subclass 151. Apparatus provided with a conduit for supplying motive fluid
to the entrainment area and a conduit for conducting motive and
pumped fluid from the entrainment area, one conduit being concentrically
disposed within the other. The direction of flow of the motive fluid
being opposite to the direction of flow of the combined motive and
pumped fluid.
This subclass is indented under subclass 151. Apparatus combined with heat exchange means to reduce the
temperature of the motive fluid or the pumped fluid or both other
than by a mere direct interchange of heat between the motive and
pumped fluids.
(1)
Note. This definition excludes the injection of one fluid
into another fluid even though for the sole disclosed purpose of cooling
if the injected fluid has a pumping effect on the other fluid by
a jet or entrainment action (i.e., transfer or velocity energy).
This subclass is indented under subclass 151. Apparatus in which motive fluid acts to entrain pumped fluid
and then the combined motive and pumped fluid stream acts to further
entrain additional fluid to be pumped at a point downstream of the
first entrainment.
This subclass is indented under subclass 151. Apparatus in which an additional jet device is provided
with discharges to waste and is so connected as to draw the pumped
fluid into the first jet pump to prime same or to remove pumped
fluid from an overflow or waste chamber of the first jet.
This subclass is indented under subclass 151. Apparatus having a plurality of motive fluid nozzles, the
motive fluid from each acting to entrain pumped fluid, the combined
motive and pumped fluid from each entrainment traveling in a separate
downstream conduit or combining tube, the entrainments being in
parallel with one another; i.e., each motive fluid stream is separate
from the others and acts to entrain separate flows of pump fluid.
(1)
Note. The pumped fluid may originate in a common pipe or
conduit and the outputs from the downstream conduits may combine
into a single flow.
This subclass is indented under subclass 151. Apparatus in which the motive fluid is projected into the
entrainment area in the form of a continuous annulus and pumped
fluid is entrained both outwardly and inwardly of the motive fluid
annulus.
This subclass is indented under subclass 151. Apparatus in which there is provided within the apparatus
a plurality of alternate flow confining segments (e.g., nozzles,
combining tubes, etc.) and means to permit one of the segments to
be adjusted into use position to the exclusion of another from use
position.
This subclass is indented under subclass 151. Apparatus in which in a single zone of entrainment of pumped
fluid (i.e., single inflow of pumped fluid and single outflow of
combined pumped and motive fluid) there is provided means to project
a plurality of separate motive fluid streams or different sources
of motive fluid are provided for delivery through the same motive
fluid projecting means.
(1)
Note. The separate motive fluid streams or sources may be
used simultaneously or alternately.
This subclass is indented under subclass 179. Apparatus in which means are provided by which at least
one of the motive fluid jets or sources may be individually controlled.
This subclass is indented under subclass 151. Apparatus in which the jet pump unit is adapted to be connected
by a readily detachable means to a spigot or a flexible tube from which
motive fluid for the jet is supplied.
This subclass is indented under subclass 151. Apparatus including means for controlling the operation
of the jet pump or the flow of motive or pumped fluid to or from
the jet pump by means of a valve or throttling action.
This subclass is indented under subclass 182. Apparatus in which the control is effected by a change in
the relative axial positions of the motive fluid nozzle and the
conduit which receives the combined motive and pumped fluid from
the entrainment area.
This subclass is indented under subclass 183. Apparatus in which the change in the relative axial positions
of the nozzle and conduit is in response to variation in fluid pressure
caused by the operation of the jet pump.
This subclass is indented under subclass 182. Apparatus in which the controlling means is located in the
output flow line downstream from the entrainment area.
(1)
Note. The controlling means is in the main outflow line from
the pumps and does not merely control a passage to waste.
This subclass is indented under subclass 182. Apparatus in which the motive fluid is directed into the
entrainment area by a nozzle and valve means are provided which
when actuated cause all or a portion of the motive fluid to be diverted
from the nozzle.
(1)
Note. The diversion of the motive fluid may be merely around
the nozzle to reenter the pump downstream of the normal entrainment
area or the diversion may be away from the pump as, for example,
into the normal pumped fluid inlet line.
This subclass is indented under subclass 182. Apparatus in which the controlling means is positioned in
the motive fluid inlet line upstream of the entrainment area or
at the point of discharge into the entrainment area.
This subclass is indented under subclass 187. Apparatus including controlling means in the pumped fluid
inlet line upstream of the entrainment area, means being provided
which interrelates the motive fluid and pumped fluid controlling
means such that when one is actuated the other is necessarily controlled.
This subclass is indented under subclass 187. Apparatus in which the motive fluid controlling means acts
in response to variation of fluid pressure which is incident to
the operation of the jet pump.
This subclass is indented under subclass 182. Apparatus in which the controlling means is positioned in
the pumped fluid inlet line upstream of the entrainment area.
This subclass is indented under subclass 190. Apparatus in which the pumped fluid controlling means acts
in response to variation of fluid pressure which is caused by the
operation of the jet pump.
This subclass is indented under subclass 182. Apparatus in which the controlling means controls the flow
to waste of the combined motive and pumped fluid downstream of the
entrainment area, said controlling means acting in response to variation
of fluid pressure caused by the operation of the jet pump.
This subclass is indented under subclass 192. Apparatus in which the controlling means comprises an axially
movable section of the flow conduit or a movable wall portion of
the conduit downstream of the entrainment area.
for a movable combining tube which shifts in response
to fluid flow and in shifting varies the axial relationship between
the motive fluid nozzle and the entrance to the combining tube.
This subclass is indented under subclass 151. Apparatus having means to impart to the pumped fluid a whirling
or helical motion prior to its being entrained by the motive fluid.
This subclass is indented under subclass 151. Apparatus in which a claim includes a recitation of the
material of which the jet pump or a part thereof is made.
This subclass is indented under subclass 151. Apparatus in which some portion of the flow confining means
of the jet pump is represented in a claim by a mathematical formula
or equation or some specific proportions or dimensions of the parts
are set forth.
This subclass is indented under subclass 151. Apparatus in which the motive fluid is supplied as an annular
stream which entrains the pumped fluid centrally thereof.
This subclass is indented under subclass 151. Apparatus in which a claim includes details of the construction
or shape of the nozzle from which motive fluid is projected into
the entrainment area.
(1)
Note. This subclass includes specific nozzle shapes to provide
a particular shape or pattern of motive fluid projection.
This subclass is indented under the class definition. Apparatus comprising a plurality of discrete pumps of different
basic types.
(1)
Note. This definition does not include a plurality of pumps
of different basic types if one is a mere auxiliary or ancillary
of the other (e.g., lubricant or cooling water or condensate removal
pump for main pump).
(2)
Note. This definition includes diverse pumps wherein one
of the pumps is disclosed merely as priming another, the priming
pump in this instance not being considered merely ancillary to the
other pump.
(3)
Note. Mere difference in size or shape, etc., of the same
basic type of pump is not included under this definition.
(4)
Note. The following are exemplary of different basic types
of pumps: (a) Rotary expansible chamber; (b) Rotary nonexpansible
chamber; (c) Reciprocating working member (piston or cylinder);
(d) Collapsible chamber (e.g., diaphragm, bellows); and (e) Hydraulic ram.
(5)
Note. A patent will be classified as an original in this
or indented subclasses if the pumps are disclosed as diverse, but
a claim recites only one of the pumps specifically. On the other
hand a plurality of pumps which are disclosed as diverse but are
claimed broadly will not be classified as an original under the
definition.
This subclass is indented under subclass 199.1. Apparatus wherein one of the pumps supplies fluid to the
pumping chamber of the main pump which is supplied with a valve
to exhaust the fluid from the pumping chamber.
This subclass is indented under subclass 199.1. Apparatus in which one of the pumps is priming or maintaining
the other pump primed and including means responsive to the level
of pump fluid in some part of the system to control the pump fluid
or modify the operation of at least one of the pumps.
(1)
Note. The operation of the pump is considered to be modified,
for example, if the drive means is controlled, the capacity is varied,
or a valve is operated to bypass the discharge, to draw from a different
source, to deliver to a different place or vary the inlet or outlet.
This subclass is indented under subclass 199.1. Apparatus in which one of the diverse pumps comprises a
pumping member which has unidirectional rotary motion about a fixed
axis and acts to pump fluid by a centrifugal, centripetal or screw
effect.
for the combination of a centrifugal pump and a
diverse pump for priming the centrifugal pump with liquid level responsive
control of one of the pumps or the pump fluid.
This subclass is indented under subclass 201. Apparatus having means to modify the operation of another
of the pumps in response to a condition of the rotary nonexpansible
chamber-type pump.
(1)
Note. The operation of the pump is considered to be modified,
for example, if the drive means is controlled, the capacity is varied,
or a valve is operated to bypass the discharge, to draw from a different
source, to deliver to a different place or vary the inlet or outlet.
(2)
Note. The condition of the pump to which the control responds
may be, for example, pressure, flow, loss of prime, etc.
This subclass is indented under subclass 201. Apparatus in which the diverse pumps are arranged such that
the entire or a substantial portion of the output of one is directed
to the second so as to be serially acted upon thereby, the rotary
nonexpansible chamber-type pump being upstream of the diverse pump
so as to feed fluid thereto with the diverse pump acting as a second
stage.
This subclass is indented under subclass 199.1. Apparatus in which one of the pumps is of the rotary expansible
chamber type having a partition (i.e., vane or abutment) or cylinder
which moves incident to rotation of the pump, the partition or cylinder
constituting or being directly connected to a piston which reciprocates
upon movement of the partition or cylinder, the piston operating
within a chamber and forming therewith a reciprocating expansible chamber
pump.
This subclass is indented under subclass 199.1. Apparatus in which the diverse pumps are arranged such that
the output of one is directed to the inlet of the second so as to
be serially acted upon thereby.
This subclass is indented under subclass 205. Apparatus in which the fluid is acted upon by a rotary expansible
chamber- type pump and then by an expansible chamber- type pump having
a pumping member which performs its pumping function by a reciprocating
(including oscillating) motion.
(1)
Note. A rotary expansible chamber- type pump under this definition
is as defined in Class 418.
(2)
Note. Flexible wall pumping members (e.g., diaphragm, bellows)
are not considered to have reciprocating motion under this definition.
This subclass is indented under the class definition. Apparatus in which a pumping action is obtained by the direct
application of heat to the fluid to be pumped.
This subclass is indented under subclass 207. Apparatus in which the fluid to be pumped is a liquid, the
application of heat to the liquid causing at least a portion thereof
to vaporize, the vapor pressure then impelling the liquid through
an outlet.
This subclass is indented under subclass 208. Apparatus which includes valve means which controls flow
of the fluid which is pumped into a chamber means in which said
fluid is vaporized, said valve means being closed by a buildup in
pressure during vaporization of said fluid and opened by a decrease
in pressure after the vapor or fluid has been expelled from said chamber.
This subclass is indented under the class definition. Apparatus in which there is provided biasing means movable
relative to a reciprocating-type pumping member, said biasing means receiving
energy from the pump fluid and serving to bias the pumping member
in opposite directions over different portions of pumping member
movement in one reciprocatory stroke direction.
This subclass is indented under the class definition. Apparatus in which the pump is adapted to be mounted upon
or attached to a device which is subject to or adapted to produce motion
or vibration, the pump having a relatively movable pumping member,
the relative movement of which is caused by the inertia thereof
and the motion or vibration of the device or by the inertia of a
separate member which is connected to or operatively associated with
the pumping member.
LIQUID LEVEL RESPONSIVE CONTROL OF DISPLACEMENT, VOLUMETRIC CAPACITY, OR DRIVE TRANSMISSION
This subclass is indented under the class definition. Apparatus in which the pump or means for transmitting motion
to the pump from a source of power is provided with control means for
either (1) interrupting motion of the pump (e.g., clutch, lock,
etc.), (2) varying the rate of motion of the pump (e.g., brake,
dashpot, adjustable gearing, etc.), (3) changing the swept volume
of displacement of an expansible chamber-type pump, or (4) changing
the volumetric capacity of an expansible chamber- type pump (e.g.,
clearance control); said control means being operable in response
to the level of pump fluid.
CONDITION RESPONSIVE CONTROL OF DRIVE TRANSMISSION OR PUMP DISPLACEMENT
This subclass is indented under the class definition. Apparatus in which the pump or means for transmitting motion
to the pump from a source of power is provided with control means for
either (1) interrupting motion of the pump (e.g., clutch, lock,
etc.), (2) varying the rate of motion of the pump (e.g., brake,
dashpot, adjustable gearing, etc.), or (3) changing the swept volume
of the pumping member of an expansible chamber-type pump (e.g.,
stroke control); said control means being operable in response to
a sensed condition of the pump or pumped fluid.
for means for varying the volumetric capacity of
an expansible chamber-type pump in response to a sensed condition,
the capacity varying means not affecting pumping member displacement
(e.g., clearance control).
This subclass is indented under subclass 212. Apparatus combined with fluid flow control means for varying
the flow of pumped fluid to or from the pump or pump chamber, or
controlling a relief or bypass which means is also operated by sensing
the occurrence of a condition or a change in condition.
(1)
Note. See the definition and notes under subclass 279, which
notes are also applicable to this subclass.
This subclass is indented under subclass 212. Apparatus in which the control means comprises a positive
lock, friction brake, fluid retarder or similar device which will
act to prevent or restrict movement of the pumping member by acting
directly thereon or on a part directly connected thereto.
This subclass is indented under subclass 212. Apparatus in which the pump comprises an expansible chamber-type
pump having a plurality of relatively movable pumping elements working
in a single pump chamber and relatively movable driving elements
are connected to the pumping elements so that they may be driven
into the pumping chamber together, e.g., in phase, or at different
times, e.g., out of phase, to vary the volume of fluid pumped; the control
means acting to change the relationship, e.g., phasing, between
the driving elements to vary the output of the pump.
This subclass is indented under subclass 212. Apparatus comprising a plurality of pumping units wherein
the control means effects a change in the operating characteristics
of one unit relative to another.
This subclass is indented under subclass 212. Apparatus in which the pump has a mechanical pumping member
(e.g., rotor or piston) driven from a rotary driving element and
an inlet and an outlet; means being provided to change the flow
of the pumped fluid without altering the direction of rotation of
the driving element, i.e., the inlet under one condition of operation becomes
the outlet under the other condition of operation and vice versa;
the control means acting on the reversing means to cause its operation.
This subclass is indented under subclass 212. Apparatus in which the pump is of the expansible chamber-type,
i.e., having a relatively movable pumping member and chamber, and including
a mechanical movement having relatively movable parts in which the
driving relationship is varied by an adjustable element (e.g., cam,
eccentric, link, etc.,) which is moved relative to another part.
This subclass is indented under subclass 218. Apparatus wherein the relatively movable pumping member
and chamber comprise a rotor and an encompassing movable stator
in which movement of the stator causes the pumping member to move
radially of the axis of rotation of the rotor resulting in a change
in the stroke of the pumping member or a change in displacement
of the pump.
Rotary Expansible Chamber Devices,
subclasses 24+ , for rotary expansible chamber motors or pumps
in which the capacity is varied by a movable member (e.g., stator,
etc.), the member being moved by the direct application of working
fluid thereto, there being no condition responsive valving controlling
the application or release of fluid to or from the member.
This subclass is indented under subclass 218. Apparatus wherein the cam or eccentric forms a part of a
rotary drive in which a cooperating cam follower or eccentric strap
moves radially of the shaft on which the cam or eccentric is mounted
or carried.
(1)
Note. A crankshaft having an adjustable throw on which a
working member, a pitman, or member connected to the working member
is mounted is included under this definition as the equivalent of an
eccentric and strap.
This subclass is indented under subclass 218. Apparatus in which the adjustable element is a cam which
forms part of a rotary drive means and the camming face of the cam
extends transversely of the axis of rotation of the rotary drive
means so that the cam follower moves parallel to such axis.
This subclass is indented under subclass 222.1. Apparatus in which the adjustable element is operated in
response to pressure introduced into the sump.
This subclass is indented under subclass 212. Apparatus including a mechanical movement having relatively
movable parts comprising elements of the drive which can be engaged and
separated to start and stop the pump while permitting the power
source to operate continuously.
This subclass is indented under the class definition. Apparatus in which there is a source of fluid having an
initial pressure or velocity head, and means are provided which
utilize the energy of said source fluid to boost the head of a first
portion thereof to a higher value, by reducing the head of a second
portion of said source fluid.
(1)
Note. This definition does not include motor driven pumps
which pump from an unconfined body of fluid in which the motor is
driven by energy derived from the unconfined body of fluid (e.g.,
fluid current, tide and wave motor, etc.).
This subclass is indented under subclass 225. Apparatus in which the source fluid has an initial velocity
head, said means including plural fluid outlets, one of said outlets
being a valve controlled waste outlet, whereupon the sudden closing
of said valve effects discharge or a first portion of said source
liquid through the other of said outlets at a higher head, while
a second portion has passed to waste at a lower head.
This subclass is indented under subclass 226. Apparatus including two or more valve controlled waste outlets,
the source fluid flowing to each waste outlet through a separate
conduit.
WITH CONDITION RESPONSIVE CONTROL OF COOLANT OR LUBRICANT
This subclass is indented under the class definition. Apparatus in which the pump or some part thereof (e.g.,
cylinder, bearing, drive motor) is cooled or lubricated by the feed
or circulation of a separate fluid (i.e., not the pumped fluid),
and means to control the flow of or modify a condition of said separate
fluid (e.g., temperature), said means being operated by a separate
sensing means which is responsive to a condition or a change of
condition other than a manual control.
This subclass is indented under the class definition. Apparatus in which the pump is mounted on or proximate to
an object and is powered by the relative motion of movable parts
of the object or by motion of the object as a whole, the object
being of special construction or adaptation to perform a particular
function other than (1) a supporting function, or (2) the pumping
which forms the basic subject matter of this class.
(1)
Note. This definition includes a pump operator in the form
of a treadle, rail section, etc., which is actuated by the passing
of a vehicle thereover.
This subclass is indented under subclass 229. Apparatus in which the object is a device for supporting
the weight of a person in a seated position, wherein the pumped
fluid is directed to elsewhere other than toward a body part of
a seated occupant.
Chairs and Seats,
subclass 180.16 for chairs combined with pumps in which the pumped
fluid is directed toward a body part of the occupant of the chair.
This subclass is indented under subclass 229. Apparatus in which the pump is mounted on or attached to
a vehicle and is driven incident to movement of the vehicle or the
relative motion of vehicle parts.
(1)
Note. The pump may be attached to the vehicle only when it
is desired to operate the pump. For example, this definition includes
those devices in which a vehicle drive wheel is elevated and a pump attached
thereto.
(2)
Note. The pump is considered to be combined with vehicle
under this definition if it is driven by some part of the vehicle
other than directly by the vehicle motor. For example, this definition includes
those devices in which the pump is driven by a vehicle wheel or axle,
transmission, fly-wheel or tractor power take-off shaft.
This subclass is indented under subclass 231. Apparatus in which the vehicle has attached thereto a scoop
adapted to be immersed in a body of liquid located outside the vehicle,
liquid being induced to flow through the scoop due to motion of
the vehicle and the inertia of the body of liquid.
This subclass is indented under subclass 231. Apparatus in which the pump is driven by the rotating motion
of a wheel or axle of the vehicle.
(1)
Note. This definition does not include those devices in which
a ground engaging wheel is provided solely to drive the pump and
has no support function for the vehicle.
This subclass is indented under the class definition. Apparatus having (1) wheels, skids or other special means
to facilitate moving the pump over the surface on which it rests,
(2) means which specifically adapts the pump to be supported on
some part of a human body or animal, or (3) a handle by which the
pump may be carried.
(1)
Note. To fall within part (1) of this definition the wheels,
skids or the bike must be merely to make the pump ambulant or portable
and may not be a vehicle or the like intended primarily for some
other function with a pump incidentally mounted thereon (e.g., bicycle
and tire pump thereon).
for a vehicle mounted or attached pump in which
the pump is operated by some part of the vehicle (e.g., wheel or
axle) and in which the vehicle serves some function other than mounting
and driving the pump (e.g., automobile).
This subclass is indented under subclass 234. Apparatus in which the pump is driven to perform its pumping
function as a result of being moved over the surface on which it
is supported on the wheels, skids or the like.
for a vehicle mounted or attached pump in which
the pump is operated by some part of the vehicle (e.g., wheel or
axle) and in which the vehicle serves some function other than mounting
and driving the pump (e.g., automobile).
Fluid Sprinkling, Spraying, and Diffusing,
subclasses 155+ for sprayers with mobile tank-type supply means in
which the sprayer operating means is interconnected with the ground traverse
means.
This subclass is indented under the class definition. Apparatus which by adjustment or relative rearrangement
of its parts or by the addition or omission of a part is so changed
as to become basic subject matter of another class.
This subclass is indented under subclass 236. Apparatus in which a device is operable under one condition
as a pump and as a result of the adjustment, rearrangement of parts
or addition or omission of a part is operable as a motor.
for a pump mechanically driven by an internal combustion
engine including a pump mounted on an engine cylinder or head and
mechanically driven by the piston of the engine.
for a pump having a motor driven by the products
of combustion (or a component thereof) of an internal combustion
engine including a pump mounted on an engine cylinder and operated
by the pressure fluctuations in the cylinder.
Power Plants,
subclass 408 and 629, for a convertible motor and pump with
means for storing the fluid energized by the pump mechanism and utilizing
such fluid as the motive fluid for the converted motor.
Internal-Combustion Engines,
subclasses 319+ for internal combustion engines whose cycles are
modified to produce a braking action by displacement of fluid and
not being disclosed as capable of delivering fluid for a useful
external purpose.
This subclass is indented under the class definition. Apparatus which by relative rearrangement of its parts or
by the addition or omission of a part is so changed as to operate
in a different way or change its function or enhance its operation
in some way.
for the combination of a rotary nonexpansible chamber-type
pump and a jet pump in which the location of the jet pump is changeable
by assembly or disassembly.
This subclass is indented under subclass 238. Apparatus in which the rearrangement of parts or addition
or omission of a part is accomplished in order to permit or accommodate
the operation of the pump in a reverse direction of rotation or
a reverse direction of flow of pump fluid through the pump.
This subclass is indented under the class definition. Apparatus in which the pumping is effected by a body of
liquid which is at least partially confined and forms a liquid piston
to act as a pumping member, either the liquid piston or the means
confining the liquid or both being set into motion, the inertia
of the liquid piston (i.e., the tendency to remain in motion or at
rest) or the momentum thereof being effective to produce the pumping
action.
(1)
Note. For a patent to be classified under this definition
the pump must rely upon the inertia or momentum of the liquid for its
operation. In many pumps such as a reciprocating piston, expansible
chamber type the momentum of liquid being expelled from a chamber
might incidentally also produce additional pumping action over that
produced by the expansible chamber effect. However, such pumps
are not included under this definition.
This subclass is indented under subclass 240. Apparatus in which the liquid is set in motion by the absolute
movement of the means confining the liquid.
POSITION RESPONSIVE BYPASS BETWEEN PLURAL PUMP CHAMBERS
This subclass is indented under the class definition. Apparatus comprising two or more pump chambers there being
provided means for separately controlling the inlet of fluid to
each chamber and each chamber being provided with a relatively movable
wall portion (e.g., piston) for changing the chamber volume; there being
additionally provided a flow path for establishing intercommunication
between said chambers which is distinct from the normal pump fluid
inlet flow paths, said flow path being controlled as a result of
the wall portion reaching a predetermined position in one of said
pumping chambers.
(1)
Note. For purposes of this definition, the plural pumping
chambers may be formed by a single cylinder having a single piston
therein providing oppositely facing pumping faces for dividing the cylinder
into plural chambers.
This subclass is indented under the class definition. Apparatus in which the pumped fluid is first acted upon
by one pump or pumping member and subsequently acted upon by a second
pump or pumping member and provided with heat exchange apparatus
interposed between the pumps or pumping members to dissipate heat
from the pump fluid generated by the pumping operation.
(1)
Note. To be classified under this definition there must be
claimed some structure peculiarly adapted to cooling or heat exchange
such as fins, cooling fan, etc., or a specific structural relationship
of the intercooler to the pump. A mere conduit between stages in
which cooling might incidentally occur would be excluded. The mere
claiming of an "intercooler" or "cooler" is
not sufficient to cause classification under this definition.
Heat Exchange, for heat exchange, per se, and see particularly
subclasses 120+ for heat exchangers with a pump or impeller for
moving the exchanger material.
This subclass is indented under the class definition. Apparatus in which the pumped fluid is serially acted upon
by a plurality of pumping units.
(1)
Note. This definition includes those expansible chamber pumps
in which the fluid is pumped by being successively acted upon by
opposed faces of a unitary pumping member provided valving is present
in all three of the following locations; inlet valve means to the
first chamber, valve means to control the flow from one face to
the other (e.g., valved piston) and outlet valve means from the
second chamber. It is not necessary that all of such valving be
claimed, but all must be disclosed. In the absence of the disclosure
of any of said valving in combination with the unitary pumping member
the patent is excluded from this definition. See subclasses 437+.
However, this definition does include those pumps in which the fluid
is successively acted upon by different faces of a unitary pumping
member if the faces move in the same direction to effect the pumping action.
In this case the valving for the three locations above noted is
not required.
(2)
Note. This definition excludes those pumps having a unitary
pumping member which includes a plurality of spaced serially arranged
self-acting valves which simultaneously control the pumped fluid
to or from a common expansible chamber; this not being considered
to be a plurality of pumping units. See subclass 459.
(3)
Note. Multi-stage rotary pumps of the expansible or nonexpansible
chamber type are generally classified in Classes 415 and 418. However,
said pumps are included in this class in certain combinations such
as when driven by a significantly claimed motor. Such rotary pumps
will be included under this definition only if they include a plurality
of rotors or runners which have or are capable of relative movement
during operation.
(4)
Note. Apparatus in which the pump fluid successively flows
from a pump chamber and then through a motor working chamber to
be expelled therefrom with exhausted motive fluid is excluded under
this definition as constituting successive stages. See subclasses
377+.
(5)
Note. Relatively movable pumping members which successively
act upon the pumped fluid are included under this definition and
do not require the disclosure of valves in the three locations as set
forth in (1) Note above.
This subclass is indented under subclass 244. Apparatus in which one of the pumping units is driven by
a fluid motor, the motive fluid for operating the fluid motor being
provided from another of the pumping units in the series.
This subclass is indented under subclass 244. Apparatus in which the serial pumping units are provided
with pumping members which are capable of or constrained to move
relative to each other, said pumping members being driven by two
or more working members which are capable of or constrained to move relative
to each other.
This subclass is indented under subclass 246. Apparatus in which the pumping members and motor working
members partake of a continuous, unidirectional, rotary movement
about an axis.
This subclass is indented under subclass 244. Apparatus including a plurality of individual pumping members
or units each of which handles a portion only of the total fluid
pumped (i.e., operate in parallel flow paths) and a further single
pumping unit or member which acts upon the total fluid handled by
said plurality of pumping members or units, the single pumping unit
or member acting upon the fluid either prior or subsequent to its
being acted upon by said plurality of pumping members or units.
(1)
Note. A plurality of pumping members acting in a single expansible
chamber are not considered to be parallel stages under this definition.
However, a double acting pumping member is considered to be parallel
stages under this definition.
This subclass is indented under subclass 244. Apparatus in which there is a chamber or reservoir intermediate
said stages which is continually open to atmosphere, the prior stage delivering
the pumped fluid to said chamber or reservoir and the subsequent
stage removing the pumped fluid therefrom.
This subclass is indented under subclass 244. Apparatus in which in addition to the pump fluid intake
to the prior stage and discharge from the subsequent stage there
is provided (1) means in the fluid flow path intermediate the stages
whereby fluid may be introduced to be acted upon by the subsequent
stage which was not acted upon by the prior stage or (2) means to
take additional pump fluid directly into the subsequent stage which
was not acted upon by the prior stage.
This subclass is indented under subclass 244. Apparatus in which in addition to the pump fluid intake
to the prior stage and discharge from the subsequent stage there
is provided (1) means in the fluid flow path intermediate the stages
whereby pump fluid which was acted upon by the prior stage may be
discharged without being acted upon by the subsequent stage or (2)
means to permit discharge of pump fluid directly from the prior
stage without being acted upon by the subsequent stage.
This subclass is indented under subclass 251. Apparatus in which the discharge is between the stages and
operates to discharge some or all of the fluid from the prior stage
in response to the pressure of the pumped fluid at some point in
the system.
(1)
Note. The discharge is considered to be between the stages
if it is intermediate the discharge control means for the prior stage
and the intake control means for the subsequent stage (e.g., check
valves, etc.).
This subclass is indented under subclass 244. Apparatus in which the pumped fluid is controlled prior
to, during or after being acted upon by the pumping units, the control
operating in response to the occurrence of a condition or a change
in condition.
(1)
Note. The fluid may be controlled by controlling an inlet
or discharge valve (e.g., by holding an inlet or discharge valve
open), a bypass valve or a clearance space.
(2)
Note. This definition includes direct acting relief valves
and the like, but excludes a mere cyclic distributor valve (e.g.,
inlet or discharge check valve) of an expansible chamber pump.
This subclass is indented under subclass 244. Apparatus in which the successive pumping units each include
a rigid pumping member which partakes of a to-and- fro movement
to perform the pumping function.
(1)
Note. The stages may be formed by the opposite faces of a
unitary pumping member.
(2)
Note. This definition excludes pumping members of the flexible
wall type.
This subclass is indented under subclass 254. Apparatus in which the successive reciprocating pumping
members are driven by a rotary shaft having crank means or the like
thereon connected to the pumping members, a housing (i.e., crankcase)
in which the shaft operates and (1) the housing together with a
pumping member constituting one of the pumping units or (2) at least
a portion of the fluid acted upon by a prior stage passing into
the housing before being acted upon by a subsequent stage.
This subclass is indented under subclass 254. Apparatus in which the pumping members are constrained to
move in opposite directions, the pumping members containing valves
and the pump fluid passing successively through the members.
This subclass is indented under subclass 254. Apparatus in which one of the pumping members comprises
a piston which reciprocates in a fixed cylinder and another pumping
member comprises a cylinder which moves with respect to a fixed
piston encompassed thereby.
This subclass is indented under subclass 259. Apparatus in which the valved piston has (1) relatively
movable valve members which form, respectively, the inlet and outlet
valves for one of the pumping units or (2) has a movable valve member
which forms the inlet or outlet valve for one of the pumping units
and the piston itself acts as the outlet or inlet valve, respectively,
for said unit (e.g., piston controlled port, etc.).
This subclass is indented under subclass 259. Apparatus in which the piston is provided with a plurality
or relatively movable valves through which the pump fluid must flow
serially enroute from one stage of pumping to the next stage of
pumping.
This subclass is indented under subclass 259. Apparatus in which the valve in the piston is the intake
valve to the first pumping unit of the series of pumping units which
act on the pump fluid.
This subclass is indented under subclass 259. Apparatus in which in addition to the successive pumping
units including the valved piston another pumping member is provided
which pumps fluid in parallel with said units; i.e., the fluid pumped
by the pumping member does not pass through the pumping units.
(1)
Note. The additional pumping member maybe an element of a
second multistage pump unit.
This subclass is indented under subclass 259. Apparatus in which the pumping units are driven by a motor
of the type which includes a movable working member which is motivated by
a fluid.
This subclass is indented under subclass 254. Apparatus in which the successive pumping members are capable
of or constrained to move relative to one another incident to the
pumping operation.
This subclass is indented under subclass 254. Apparatus in which the pumped fluid is successively acted
upon by three or more reciprocating pumping members.
This subclass is indented under subclass 254. Apparatus in which the pumping members which successively
act upon the pump fluid are each of the type which act to pump separate streams
of fluid in both directions of reciprocation, i.e., each pumping
member of the series is of the double acting type.
This subclass is indented under subclass 254. Apparatus in which the successive pumping members are unitary
with one another, and are operative in the same direction of motion
for the pumping (i.e., discharging) stroke.
THREE OR MORE CYLINDERS ARRANGED IN PARALLEL, RADIAL, OR CONICAL RELATIONSHIP WITH ROTARY TRANSMISSION AXIS
This subclass is indented under the class definition. Apparatus in which the pump comprises three or more cylinders,
each cylinder being provided with a relatively reciprocating piston (include
diaphragm) to thereby form a plurality of pumping chambers, the
cylinders or a transmission element in common operative engagement
with said cylinders or pistons being adapted to rotate about a fixed
axis; said cylinders being physically arranged in a manner such
that their longitudinal axes either (1) intersect at a common point
or (2) extend parallel to said axis of rotation.
(1)
Note. Devices having three or more cylinders arranged in
the above defined relationship are intended to be included hereunder
only in those instances where the disclosed structure limits the
device to a pumping function (e.g., check valve control of admission
or discharge of pump fluid to or from the cylinders) or has structure
claimed which has utility only in a pumping operation. Therefore, plural
cylinder devices of this arrangement which are in fact capable of
operation as a motor and which have no features claimed of sole
pump utility are classified in Class 91, Motors: Expansible Chamber
Type, regardless of whether they are disclosed and claimed generically
or solely as pump or motor. However, intended to be classified
in this class are plural cylinder devices of the above defined type
which are disclosed solely or claimed solely as a pump and which
in addition claim means separate from the pump for sensing a condition (excludes
direct response via pumping member) to effect control of either
(1) the pumped fluid (see subclass 270, indented hereunder) or (2)
the pump drive transmission (see subclasses 212+). Also,
plural cylinder devices of this type having a significantly claimed motor
drive therefor are intended to be classified in this class (see
subclass 271, indented hereunder) provided the claims do not reflect
control of the drive in response to a sensed pump condition which
would cause classification in subclasses 1+.
(2)
Note. To fall within the scope of this definition the motor
must be of the type which includes at least three cylinders and
none of said three may be formed integral with the relatively reciprocating piston
of another.
Machine Element or Mechanism, appropriate subclasses, for mechanical motion converting
apparatus having no pump fluid valving or porting claimed and see
especially
subclass 22 for apparatus for converting rotary motion to reciprocating
and rotary motion and subclass 55 for apparatus employing a cam
and slide for converting rotary motion to or from reciprocating
or oscillating motion.
Motors: Expansible Chamber Type,
subclasses 472+ , for three or more cylinders arranged in parallel,
radial, or conical relationship with a rotary transmission axis
and which are generic to operation as either a pump or a motor.
See note above for the distinction between this subclass and subclasses
472+ in Class 91.
Expansible Chamber Devices, appropriate subclasses, for expansible chamber devices
having plural parallel, radial, or conical arranged cylinders in
which there is no valving of the pumped fluid claimed and see especially
subclasses 12.1+ for displacement control of plural cylinders arranged
in parallel, radi
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