Valves and valve actuation – Fluid actuated or retarded – Piston type expansible chamber reciprocating valve actuator
Patent
1996-09-13
1999-05-04
Walton, George L.
Valves and valve actuation
Fluid actuated or retarded
Piston type expansible chamber reciprocating valve actuator
34 80, 55417, 251 635, 251282, 251356, F16K 31122
Patent
active
058994351
ABSTRACT:
A valve seal system for passageway through a valve body emerging through a first generally flat and rigid surface, having a valve member including a resilient seal with generally flat exposed surface adapted to be brought into contact with the generally flat rigid surface, and having a generally circular, raised resilient ring portion extending from the generally flat exposed surface, the raised resilient ring portion adapted to be compressed against the generally flat rigid surface to seal the resilient seals against the generally flat rigid surface when said valve member is moved to a closed position by virtue of the raised resilient ring portion being compressed against the generally flat rigid surface.
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Mitsch Matthew D.
Streitman Lawrence R.
Walton George L.
Westinghouse Air Brake Co.
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