Check valve

Details Check valve Check valve

1992-07-02

1993-05-11

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Direct response valves

137844, 137846, F16K 1516

Patent

active

052092640

ABSTRACT:
A check valve for bags containing goods such as rice or other grains or foods. The valve is used to discharge excessive air from the bag while preventing outside air from entering the bag. The check valve is constructed of plural plastic films joined together.

REFERENCES:
patent: 4708167 (1987-11-01), Koyanagi
patent: 4917646 (1990-04-01), Kieves

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