Valve body with integral seal retention groove

Details Valve body with integral seal retention groove Valve body with integral seal retention groove

2007-05-29

2007-05-29

Keasel, Eric (Department: 3753)

Valves and valve actuation

Reciprocating valve

Diverse material seal at valve interface

C251S333000, C251S358000, C137S516290

Reexamination Certificate

active

11229221

ABSTRACT:
A valve body having at least one internal hollow or space comprises two separately formed portions joined by at least one cylindrical web. Internal space may communicate with space outside the valve body via a fluid passage, and internal space may be filled with a substantially incompressible flowable substance to facilitate pressure equalization across the valve body. Forging or casting valve body portions to near-net-shape prior to joining minimizes machining necessary to achieve a final desired shape. Increased valve durability and reduced metal wear arise from the reduced valve body weight and correspondingly reduced impact loading as the valve body moves to seal against a valve seat. A single-durometer or dual-durometer elastomeric seal may be cast and cured in place in a peripheral integral seal retention groove, coupled thereto in part through welding flash protruding into the groove and/or through at least one serration in the groove.

REFERENCES:
patent: 2435948 (1948-02-01), Wischhusen
patent: 2627259 (1953-02-01), Wood et al.
patent: 4518329 (1985-05-01), Weaver
patent: 5253987 (1993-10-01), Harrison
patent: 5931474 (1999-08-01), Chang et al.
patent: 6435475 (2002-08-01), Blume

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