Check valve and siphon tube assembly employing same

Details Check valve and siphon tube assembly employing same Check valve and siphon tube assembly employing same

1976-05-21

1978-06-20

Cohan, Alan

Fluid handling

Line condition change responsive valves

Direct response valves

137140, 137146, 137151, 137527, F16K 1503, F04F 1000

Patent

active

040956156

ABSTRACT:
A check valve for substantially preventing fluid flow in a first direction, but allowing a substantially unrestricted fluid flow in a second, opposite direction, the check valve including a tubular body and a flapper valve hingedly disposed within the tubular body so that the flapper valve, which is formed from a diagonally-cut section of tubing, may substantially block the tube by sealing its cut edges against a first inner wall portion of the tubular body and so that its cut edges may also lie substantially flush along a second inner wall portion of the tubular body allowing for substantially unimpeded fluid flow.

REFERENCES:
patent: 364206 (1887-06-01), Baltzley
patent: 385292 (1888-06-01), Baltzley
patent: 474843 (1892-05-01), Mahan
patent: 1000719 (1911-08-01), Cram
patent: 1187683 (1916-06-01), Vernon
patent: 1926759 (1933-09-01), Wallman
patent: 2913001 (1959-11-01), Maslow et al.
patent: 3682193 (1972-08-01), Newsteder
patent: 3771544 (1973-11-01), Horvath
patent: 4034780 (1977-07-01), Horvath
patent: 4035299 (1977-07-01), Vroeginday

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