Check valve

Details Check valve Check valve

1978-07-31

1980-09-23

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Direct response valves

251357, 251DIG1, F16K 1503

Patent

active

042236975

ABSTRACT:
A flow through check valve having a covered access port and a pivotal clapper member, the valve body and access port cover providing a recess to completely receive the clapper member out of the flow stream such that the clapper member never comes into contact with the access port cover. The clapper member is provided with a modified rabbet cut recess for receiving an O-ring therein which results in a reduction in weight, a reduction of manufacturing costs and ease of replacement of the O-ring.

REFERENCES:
patent: 2918934 (1959-12-01), Wheatley
patent: 3612098 (1971-10-01), Bora
patent: 4054153 (1977-10-01), Guyton

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