| US 6,964,727 C1 (6992nd) | ||
| COKE DRUM BOTTOM DE-HEADING SYSTEM | ||
| Ruben F. Lah, West Jordan, Utah, assignor to Curtiss-Wright Flow Control Corporation, Roseland, N.J. | ||
| Reexamination Request No. 90/008,209, Oct. 13, 2006. | ||
| Reexamination Certificate for Patent 6,964,727, issued Nov. 15, 2005, Appl. No. 442,673, May 20, 2003. | ||
| Continuation-in-part of application No. 09/946,917, filed on Sep. 5, 2001, now Pat. No. 6,565,714, Provisional application No. 60/275,527, filed on Mar. 12, 2001. | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. C10B 25/10;25/00; |
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| U.S. Cl. 202—244 |
| AS A RESULT OF REEXAMINATION, IT HAS BEEN DETERMINED THAT: |
| Claims 1-32 and 37 are cancelled. |
| Claims 33 and 36 are determined to be patentable as amended. |
| Claims 34 and 35, dependent on an amended claim, are determined to be patentable. |
| 33. A method for de-heading a coke drum following the manufacture of coke therein, said method comprising the steps of: obtaining at least one coke drum designed for the manufacture of coke;
equipping
said coke drum with a de-header valve, said de-header valve removably coupled to said coke drum and comprising:
a main body having means for connecting said de-header valve to said coke drum; a dynamic, live loaded seat coupled to said main body;
a static seat coupled to said main body in opposition to said [first seat ]dynamic, live loaded seat; [and]
a blind coupled to said main body and actuated by an actuator, said blind capable of moving in a substantially lateral bi-directional manner within said de-header valve between said dynamic, live loaded seat and said static [seats]seat to control the opening and closing of said de-header valve, said blind providing a seal between said dynamic, live loaded seat and said static [seats]seat;
closing said blind and sealing said dynamic, live loaded seat against said blind so as to seal said de-header valve;
manufacturing said coke from a refinery process; and
de-heading said coke drum by actuating said blind and causing said blind to slide across said dynamic, live loaded seat and said static seat into an open position, said dynamic, live loaded seat and said static seat thus shearing said coke in said coke drum as said blind is displaced.
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