Check valve assembly

Details Check valve assembly Check valve assembly

1984-04-18

1985-04-30

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Direct response valves

13751611, F16K 1514

Patent

active

045137846

ABSTRACT:
A check valve assembly is disclosed having a valve chamber with an inlet port and an outlet port. An elastomeric umbrella valve is contained in the chamber between the ports and is attached by an integral stem in a preloaded condition to normally close the inlet port and be deflectable in response to differential fluid pressure acting in one direction to open same to permit forward fluid flow therethrough past the valve and through the chamber to the outlet port. An inwardly projecting retention arrangement formed in the chamber retains the valve in operational relationship with the inlet port in the event the valve becomes unattached so that any backward flow from the outlet port still forces closure of the valve on same. A bypass channel arrangement also formed in the chamber maintains forward fluid flow past the valve to the outlet port in the event the valve becomes unattached.

REFERENCES:
patent: 2579855 (1951-12-01), Pockel
patent: 2620133 (1952-12-01), Obermaier
patent: 4369812 (1983-01-01), Paradis
patent: 4416445 (1983-11-01), Coad

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