Gas valve

Details Gas valve Gas valve

1994-03-01

1995-05-09

Hepperle, Stephen M.

Valves and valve actuation

Reciprocating valve

Diaphragm

251229, 251368, F16K 716

Patent

active

054133114

ABSTRACT:
A gas flow valve having an internal valve chamber with an inlet and outlet passage, and a movable metallic diaphragm in the chamber, the diaphragm bonded to a valve stem projecting outside of the chamber. The diaphragm has a Teflon film coating which is engageable against at least one of the inlet and outlet passages in sealing relationship, and the valve stem has a spring-biasing member outside the chamber for urging the diaphragm away from sealing engagement with the inlet and outlet passages. A peripheral rib is formed in a chamber wall and the diaphragm is held in fixed relationship against the peripheral rib.

REFERENCES:
patent: 3405907 (1968-10-01), Kayser
patent: 3918495 (1975-11-01), Abrahams
patent: 4741510 (1988-05-01), Baumann
patent: 5112027 (1992-05-01), Hanyu et al.
patent: 5253671 (1993-10-01), Kolenc

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