Fluid flow check valve and method for making same

Details Fluid flow check valve and method for making same Fluid flow check valve and method for making same

1994-11-14

1995-10-24

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Direct response valves

137843, 156290, 446224, F16K 1516

Patent

active

054602009

ABSTRACT:
A reliable and economical one way fluid flow check valve fabricated from two thin sheets of plastic is described. One or more half cylindrically shaped depressions are vacuum formed across one or both sheets of plastic, and a 1/2 funnel shape fluid entrance can be simultaneously vacuum formed in one or both sheets. The two sheets are than heat sealed together at their longitudinal edges to form the complete check valve. The check valve is preferably in the form of a truncated V. The check valve can be heat sealed into a variety of devices such as toy balloons, cushions, mattresses, inflatable boats, and the like. Various modifications are described for light or heavier fluid pressure applications.

REFERENCES:
patent: 4708167 (1987-11-01), Koyamagi
patent: 4917646 (1990-04-01), Kieves
patent: 4983138 (1991-01-01), McGrath
patent: 5144986 (1992-09-01), Drew
patent: 5248275 (1993-09-01), McGrath
patent: 5295892 (1994-03-01), Felton
patent: 5308163 (1994-05-01), Abe

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