Check valve

Details Check valve Check valve

1999-11-15

2000-08-08

Huson, Gregory L.

Fluid handling

Line condition change responsive valves

Direct response valves

137527, F16K 1500

Patent

active

060986565

ABSTRACT:
For a pipe check valve of a known construction involving a peripheral extending rubber seal and known to be installed by being manually urged through ascending movement in the pipe, the newly added recess below the peripheral seal to receive thereinto a fold-down of the seal during the ascending movement to obviate abrasion of the seal as might contribute to leakage of the check valve during use.

REFERENCES:
patent: 1087981 (1914-02-01), Reynolds
patent: 2292003 (1942-08-01), Yant et al.
patent: 2800920 (1957-07-01), Smith
patent: 2898080 (1959-08-01), Smith
patent: 3047012 (1962-07-01), Smith
patent: 4195657 (1980-04-01), Pysh

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