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| Class Numbers & Titles | Class Numbers Only | USPC Index | International | HELP |
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| Class 74 | MACHINE ELEMENT OR MECHANISM |
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![[List of Pre Grant Publications for class 74 subclass 1R]](../as.gif) | ![[List of Patents for class 74 subclass 1R]](../ps.gif) | 1R | MISCELLANEOUS |
| | 1.5 | ESCAPEMENTS |
| | 2 | AUTOMATIC OPERATION OR CONTROL (E.G., TRIPS) |
| | 3 |  Speed controlled |
| | 3.5 | Retarded |
| | 4 | Hit and miss |
| | 5R | GYROSCOPES |
| | 5.1 | With caging or parking means |
| | 5.2 | With gimbal lock preventing means |
| | 5.22 | Combined |
| | 5.34 | Multiple gyroscopes |
| | 5.4 | Gyroscope control |
| | 5.41 |  Erecting |
| | 5.42 |  By plural diverse forces |
| | 5.43 | By jet |
| | 5.44 | By weight |
| | 5.45 | By friction |
| | 5.46 | By magnetic field |
| | 5.47 | By motor torque |
| | 5.5 | Damping |
| | 5.6R | With pick off |
| | 5.7 | With rotor drive |
| | 5.8 | Vertical gyroscopes |
| | 5.9 | Horizontal gyroscopes |
| | 5F | Flexure hinges for gyros |
| | 5.95 | Flywheel structure |
| | 6 | ENGINE STARTERS |
| | 10R | SHAFT OPERATORS (RADIO TUNER TYPE) |
| | 10.1 | Preselected position |
| | 10.15 | Step by step |
| | 10.2 | Rotatable stop and projectable abutment |
| | 10.22 | Digital dial type |
| | 10.27 | Plural operator |
| | 10.41 | With detent or clicker |
| | 10.45 | Plural shafts |
| | 10.5 | Plural speed |
| | 10.6 | Cam and follower |
| | 10.7 | Tensioned flexible operator |
| | 10.8 | Gear drive |
| | 10.9 | Lever and linkage drive |
| | 10A | Remote control |
| | 813R | ROTARY MEMBER OR SHAFT INDEXING, E.G., TOOL OR WORK TURRET |
| | 814 | With safety device or drive disconnect |
| | 815 | With locating point adjusting |
| | 816 | Preselected indexed position |
| | 825 | Plural operators or input drives |
| | 826 | With means to axially shift shaft |
| | 827 | Single revolution input effects desired fractional output |
| | 813C | Control means |
| | 813L | Locking means |
| | 11 | POWER TAKE-OFF |
| | 12 | Speedometer |
| | 13 | Wheel take-off |
| | 15.2 | Plural take-off shafts |
| | 15.4 | With independent change speed gearing |
| | 15.6 | From shaft extension |
| | 15.63 | Prime mover shaft, e.g., crank shaft |
| | 15.66 | Change speed transmission shaft |
| | 15.69 | Vehicle propeller shaft |
| | 15.8 | Intermediate ends of power transmitting line |
| | 16 | POWER TABLES AND STANDS |
| | 17 | WASHER AND WRINGER |
| | 17.5 | FULL STROKE MECHANISM |
| | 17.8 | MOTION TRANSFER THROUGH IMPERFORATE FLEXIBLE SEAL |
| | 18 | FLEXIBLE SEALING DIAPHRAGM ATTACHED TO MOVING ROD AND TO CASING |
| | 828 | ALTERNATING-MOTION DRIVEN DEVICE WITH MEANS DURING OPERATION TO ADJUST STROKE |
| | 829 | Constant length stroke with means to displace end limits |
| | 831 | Stroke adjustable to zero and/or reversible in phasing |
| | 840 | ROTARY DRIVEN DEVICE ADJUSTABLE DURING OPERATION RELATIVE TO ITS SUPPORTING STRUCTURE |
| MECHANICAL MOVEMENTS |
| | 20 | Oscillating to reciprocating and alternating rotary |
| | 21 | Oscillating to reciprocating and intermittent rotary |
| | 22R | Rotary to reciprocating and rotary |
| | 23 | Rotary to reciprocating and alternating rotary |
| | 24 | Rotary to reciprocating and intermittent rotary |
| | 25 | Rotary to or from reciprocating or oscillating |
| | 26 | Head motions |
| | 27 | Reciprocating carriage motions |
| | 29 | Rack and pinion type |
| | 30 | Shifting rack |
| | 31 | Shiftable pinion |
| | 32 | Segmental pinion |
| | 33 | Alternately rotated pinion |
| | 34 | Clutchable gears |
| | 36 | Overcoming dead center |
| | 37 | Belt or chain carried member |
| | 38 | Crank, lever, toggle, and slide |
| | 39 | Crank, lazy-tong, and slide |
| | 40 | Crank, pitman, lever, and slide |
| | 42 | Crank, pitman, and lever |
| | 44 | Crank, pitman, and slide |
| | 45 | Crank, lever, and slide |
| | 47 | Crank and lever |
| | 49 | Crank and slide |
| | 51 | Crank and multiple pitmans |
| | 52 | Planetary gearing and slide |
| | 53 | Cam, lever, and slide |
| | 54 | Cam and lever |
| | 55 | Cam and slide |
| | 61 | Unbalanced weights |
| | 62 | Trammel-pitman |
| | 63 | Rotary to rotary |
| | 64 | Inertia or centrifugal transmitters |
| | 65 | Crank, pitman, lever, and crank |
| | 66 | Crank, lever, and crank |
| | 67 | Crank, pitman, and crank |
| | 68 | Cranks, link connected |
| | 69 | Cranks, slidable connections |
| | 70 | Rotary to alternating rotary |
| | 71 | Mangle connections |
| | 75 | Crank, pitman, and lever |
| | 76 | Reciprocating rack connections |
| | 79 | Oscillating rack connections |
| | 82 | Flexible connector type |
| | 83 | Associated inertia devices |
| | 84R | Rotary to intermittent unidirectional motion |
| | 86 | Rotary to gyratory |
| | 88 | Reciprocating or oscillating to intermittent unidirectional motion |
| | 89 | Reciprocating or oscillating to or from alternating rotary |
| | 89.23 | Including screw and nut |
| | 89.24 | Shaft shorter than nut |
| | 89.25 | Auxiliary drive (e.g., fluid piston, etc.) for load |
| | 89.26 | Alternate power path operable on failure of primary |
| | 89.27 | Single input split into two intermediate outputs that are subsequently superposed into a single output |
| | 89.28 | Single input, plural outputs |
| | 89.29 | Plural inputs, single output |
| | 89.32 | Carriage surrounding, guided by, and primarily supported by member other than screw (e.g., linear guide, etc.) |
| | 89.33 | Carriage surrounded, guided, and primarily supported by member other than screw (e.g., linear guide, etc.) |
| | 89.34 | Shaft moves through rotary drive means |
| | 89.35 | Plural screws in series (e.g., telescoping, etc.) |
| | 89.36 | Deflection related |
| | 89.37 | Limit stop |
| | 89.38 | Including means to selectively transmit power (e.g., clutch, etc.) |
| | 89.39 | Means to selectively lock or retard screw or nut |
| | 89.4 | Contamination related |
| | 89.42 | Backlash |
| | 89.43 | Pressurized fluid introduced between nut and screw |
| | 89.44 | Lubrication |
| | 89.45 | Manually driven |
| | 89.1 | Including inertia device |
| | 89.13 | Including bevel gears |
| | 89.14 | Including worm |
| | 89.16 | Including spur gear |
| | 89.2 | Including flexible drive connector (e.g., belt, chain, strand, etc.) |
| | 96 | Oscillating to oscillating |
| | 99R | Reciprocating to or from oscillating |
| | 100.1 | Snap action |
| | 101 | Compound lever and slide |
| | 102 | Lever and slide |
| | 103 | Straight line motions |
| | 104 | Slidable connections |
| | 105 | Link connections |
| | 106 | Toggle transmissions |
| | 107 | Cam connections |
| | 108 | Flexible connections |
| | 109 | Rack and pinion |
| | 99A | Inclined ramp |
| | 110 | Reciprocating to reciprocating |
| | 111 | MECHANICAL MOVEMENTS (INTERMITTENT GRIP TYPE) |
| | 112 | Rotary to intermittent unidirectional motion |
| | 113 | Automatically controlled |
| | 116 | Rotary crank or eccentric drive |
| | 125.5 | Intermittently engaged clutch |
| | 126 | Oscillation or reciprocation to intermittent unidirectional motion |
| | 127 | Screw and nut devices |
| | 128 | Slide actuator |
| | 130 | Rack actuator |
| Strap actuator |
| | 141.5 | Lever actuator |
| | 144 | Grip units and features |
| | 625 | ALTERNATE MANUAL OR POWER OPERATORS |
| | 640 | GEARING |
| | 650 | Nonplanetary gearing differential type (e.g., gearless differentials) |
| | 655 | Single gearing unit includes fluid drive |
| | 661 | Plural prime movers selectively coupled to common output |
| | 664 | Plural power paths from prime mover |
| | 665R | Plural power paths to and/or from gearing |
| | 670 | Alternate input connections single hand crank |
| | 718 | Fluid drive divides or combines alternate paths |
| | 720 | One path includes fluid drive |
| | 721 | Friction-type gearing |
| | 724 | Worm-type gearing |
| | 665A | Single driven plural drives |
| | 665F | Single drive plural driven |
| | 665L | Plural drivers plural driven |
| | 665Q | Alternate drivers and driven |
| | 665P | Miscellaneous (plural power paths) |
| | 730.1 | With fluid drive |
| | 731.1 | Condition responsive control |
| | 732.1 | With one or more controllers for gearing, fluid drive, or clutch |
| | 745 | In series plural interchangeably locked nonplanetary units |
| | 810.1 | Reversal of direction of power flow changes power transmission to alternate path |
| | 216.3 | Toothed gear and recirculated unconnected elements |
| | 318 | Alternating rotary or continuous |
| | 319 | Alternating rotary |
| | 325 | Interchangeably locked |
| | 329 | Disconnectable counter shaft |
| | 330 | Multiple concentric clutch shafts |
| | 331 | Plurality of counter shafts |
| | 332 | Internal-external gears |
| | 333 | Combined gear and clutch |
| | 335 | Control mechanism |
| Automatic |
| | 337.5 | Cam operated |
| | 339 | Meshing assisters |
| Longitudinally slidable |
| Multiple spur gears |
| | 347 | Multiple bevel gears |
| Single spur gear |
| | 350 | Single bevel gear |
| | 351 | Pin or crown gears |
| | 352 | Laterally slidable gears |
| | 355 | Single forward and reverse speeds |
| Slidable keys or clutches |
| | 356 | Alternative clutch shaft |
| Multiple clutch shafts |
| Single clutch shaft |
| | 380 | Pivotally supported |
| | 388R | Follow-up mechanism |
| | 390 | Eccentric driving shaft and axle |
| | 391 | Central driving shaft in axle |
| | 392 | Parallel shafts, adjustable gear mesh |
| | 393 | Varying speed ratio |
| | 395 | Adjustable |
| | 404 | Reversing means |
| | 405 | Disconnecting means |
| | 406 | Displaceable elements |
| | 409 | Backlash take-up |
| | 410 | Pressure distributing |
| | 411 | Yieldability in gear trains |
| | 411.5 | With brake means for gearing |
| | 412R | Directly cooperating gears |
| | 413 | Parallel axes or shafts |
| | 416 | Intersecting axes |
| | 422 | Rack and pinion |
| | 420 | Spur and bevel |
| | 421R | Spur |
| | 423 | Bevel |
| | 424.5 | Spiral |
| | 424.71 | Screw and nut |
| | 424.72 |  Plural longitudinally variably spaced nuts |
| | 424.73 | Threadless |
| | 424.74 | Non-linear screw |
| | 424.75 | Thread geometry |
| | 424.78 | Nut disengageable from screw |
| | 424.81 | Rolling element engaging thread |
| | 424.82 |  Recirculating rolling elements |
| | 424.83 |  Plural independent recirculating element paths |
| | 424.84 | Single thread common to plural paths |
| | 424.85 | Roller return path in shaft |
| | 424.86 | Return path geometry |
| | 424.88 | Interconnected or cooperating rollers or roller structure |
| | 424.89 | Non-recirculating rolling elements |
| | 424.94 | Less than 360 degrees of contact between nut and screw |
| | 424.6 | Driven rack or shaft |
| | 424.7 | Screw |
| | 425 | Worm |
| | 412TA | Torque actuated safety devices |
| | 431 | Gear and rotary bodies |
| | 434 | Rotary bodies |
| | 435 | Mutilated |
| | 436 | Geneva |
| | 437 | Irregular teeth and bodies |
| | 438 | External and internal teeth |
| | 439 | Sectional |
| | 457 | Teeth |
| | 467 | Lubrication |
| | 469 | CONTROL LEVER AND LINKAGE SYSTEMS |
| | 470 | Resilient connections |
| | 471R | Multiple controlled elements |
| | 473.1 | Transmission control |
| | 473.11 | Fluid actuator |
| | 473.12 | Electrical actuator |
| | 473.13 | Occupant propelled vehicle |
| | 473.15 | Transmission controlled by flexible cable |
| | 473.16 | Foot operated |
| | 473.18 | Control convertible between automatic and manual operation |
| | 473.19 | Control of plural mechanisms (e.g., control of transmission and control of 4 - wheel drive) |
| | 473.21 | Restriction of shift, gear selection, or gear engagement |
