Discharge valve

Details Discharge valve Discharge valve

2006-02-28

2006-02-28

Lee, Kevin (Department: 3753)

Fluid handling

Line condition change responsive valves

Direct response valves

C137S516290

Reexamination Certificate

active

07004195

ABSTRACT:
A discharge valve including a valve seat and a piston having a head with a bottom surface that is convex across its entirety for engaging the valve seat. The piston has a stem extending upwardly from the head away from the valve seat. A valve guide has a socket for slidably receiving the stem of the piston and a number of apertures intersecting the socket for providing pressure relief thereto. A compressed spring is disposed between the valve guide and the head for normally retaining said the in engagement with the valve seat.

REFERENCES:
patent: 1428928 (1922-09-01), Whaley
patent: 2011547 (1935-08-01), Campbell
patent: 2909192 (1959-10-01), Dobrick
patent: 3698427 (1972-10-01), Baranowski, Jr.
patent: 3749122 (1973-07-01), Gold
patent: 3845781 (1974-11-01), Hansen et al.
patent: 5226445 (1993-07-01), Surjaatmadja
patent: 5362215 (1994-11-01), King
patent: 6039073 (2000-03-01), Messick et al.
patent: 6698450 (2004-03-01), Vicars
patent: 522601 (1953-09-01), None
patent: 1113346 (1981-12-01), None
patent: 557493 (1972-09-01), None
patent: 522661 (1921-04-01), None
patent: 58-113672 (1983-07-01), None
Jan. 24, 2001—Letter to Cudd Pumping Services (2 pp).
Jan. 24, 2001—Memo to Bert Vicars (2 pp).
Jan. 30, 2001—Memo from Cudd (3 pp).
Feb. 1, 2001—Letter to Cudd (2 pp).
Feb. 15, 2001—Letter to Cudd (2 pp).
Feb. 15, 2001—Letter to Conroe Plastic Mold, Inc. (1 p).
Mar. 7, 2001—Letter to C.B. Gear & Machine, Inc. (4 pp).
May 18, 2001—Letter to Conroe Plastics Mold, Inc. (1 p).
May 31, 2001—Letter to Cudd (2 pp).
Jul. 16, 2001—Letter to Conroe (2 pp).
IDS from from U.S. Appl. No. 10/115,017, parent case, Discharge Valve.
Notice of References Cited from parent case, U.S. Appl. No. 10/115,017, Vicars, Discharge Valve.
Jul. 18, 2001—Letter to Cudd (Jimmy Brown, 1 page).
Jul. 18, 2001—Letter to Cudd (Billy DeShazer, 2 pp).
Feb. 12, 2002—Letter to Conroe (1 page).

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