Check valve

Details Check valve Check valve

1985-10-30

1987-06-23

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Direct response valves

137849, 446224, F16K 1516

Patent

active

046745327

ABSTRACT:
A check valve for a water bag, balloon toy, or the like, comprising a flat fluid pipe of plastic film open at its base end and its tip end. A flat valve body is disposed in the flat pipe and is closed along its lateral sides which are sealed to closed sides of the fluid pipe. The valve body is also closed at its side disposed towards the tip end of the fluid pipe but is open at its side disposed towards the base end of the fluid pipe. Fluid is able to flow inward in a direction from the tip end of the fluid pipe to the base end thereof through gaps between the inner surface of the fluid pipe and the outer surface of the valve body. However, fluid flow in the outward direction expands the valve body and closes the gaps to prevent outward flow.

REFERENCES:
patent: 2954048 (1960-09-01), Rychlik
patent: 3312237 (1967-04-01), Mon
patent: 3448766 (1969-06-01), Schule

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