Check valve

Details Check valve Check valve

1986-12-01

1987-11-24

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Direct response valves

1375124, 137844, 137846, F16K 1516

Patent

active

047081678

ABSTRACT:
A check valve comprising a fluid pipe of a plastic film formed in a flat shape, and at least one valve body of a rectangular plastic film disposed in said fluid pipe, said valve body being bonded at the longitudinal edges thereof to the longitudinal edges of said fluid pipe, the tip end of said valve body in the fluid flowing direction being bonded to the inner side of one of the upper and lower flat surfaces of said fluid pipe to form a closed portion and an open portion, the base end of said valve body being not bonded to said fluid pipe to form openings between said valve body and the flat upper and lower surfaces of said fluid pipe, whereby a fluid can flow in a gap between one of said openings at the base end of said valve body and said open portion at the tip end thereof.

REFERENCES:
patent: Re682 (1859-04-01), Peale
patent: 279451 (1883-06-01), Sinclair
patent: 2922437 (1960-01-01), Rippingille
patent: 3822720 (1974-07-01), Souza

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