Check valve

Details Check valve Check valve

1976-07-29

1977-07-12

Cohan, Alan

Fluid handling

Line condition change responsive valves

Direct response valves

137146, 137151, 137527, F16K 1503, F04F 1000

Patent

active

040347800

ABSTRACT:
A check valve for use in a tube has a closure element hinged in the tube which nests within one side of the tube in the open position and pivots to substantially block the tube in the closed position. The closure element has a bottom edge and an upward extending edge which intersect at 90 degrees at the diameter of the closure element, the edges meeting the side of the closure element at points disposed one above the other a distance apart greater than the diameter of the tube. A tubular seat with upper surfaces conforming to the edges of the closure element in the closed position may be inserted below it as a press fit in the tube and the closure element may be hinged to the seat.

REFERENCES:
patent: 364206 (1887-10-01), Baltzley
patent: 385292 (1888-06-01), Baltzley
patent: 1000719 (1911-08-01), Cram
patent: 1653929 (1927-12-01), Reed
patent: 1926759 (1933-09-01), Wallman
patent: 3391645 (1968-07-01), Koza
patent: 3815629 (1974-06-01), Oberholtzer

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