Check valve

Details Check valve Check valve

1973-09-17

1976-01-20

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Direct response valves

1375157, F16k 1503

Patent

active

039331733

ABSTRACT:
A check valve, comprising in combination, a valve body defining a cylindrical passage for fluid flow therethrough from an upstream side to a downstream side of said valve body; a step on said upstream side for retaining a disc thereon; a hollow cylindrical support with top and bottom portions mounted on the downstream side of said valve body around said defined passage with a straight retaining groove towards the top portion of said hollow cylindrical support for retaining a shaft; a circular disc valve with a disc face sized to seal off said defined passage which will engage said step so as to close said passage; and, a shaft tangentially attached to the top thereof, said shaft being retained for free pivotal movement in said groove, whereby, liquid flowing downstream will push open said disc face which will pivot open on said shaft, but said disc valve will close when subjected to back flow pressure.

REFERENCES:
patent: 2532067 (1950-11-01), LaBour
patent: 3509908 (1970-05-01), Latham et al.

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