Reversible flow check valve

Details Reversible flow check valve Reversible flow check valve

1990-02-07

1990-11-13

Cohan, Alan

Fluid handling

Convertible

Reversible check

13763015, F16K 1503

Patent

active

049694847

ABSTRACT:
A reversible flow check valve includes a valve body and a clapper extending across a flow passageway. A mechanism is provided to retract the clapper to permit essentially unobstructed fluid flow through the flow passageway. Further, mechanisms are provided for rotating the clapper to a first position or an opposite second position or an intermediate position to permit fluid flow in either direction. The retraction of the clapper permits the valve seats and seals to be unaffected by the rotation of the clapper, thereby preventing damage to the internal sealing mechanisms of the valve when the flow direction of the valve is reversed.

REFERENCES:
patent: 709262 (1902-09-01), Gold
patent: 1175328 (1916-03-01), Wright
patent: 2151098 (1939-03-01), Greenwood
patent: 2589176 (1952-03-01), Wheatly
patent: 3344808 (1967-10-01), Cary
patent: 3348569 (1987-10-01), Frye
patent: 3363650 (1968-01-01), Scaramucci
patent: 3474818 (1969-10-01), Hartman
patent: 3565099 (1971-01-01), Huber
patent: 3851665 (1974-12-01), Coughlin
patent: 4067359 (1978-01-01), Kivast
patent: 4308894 (1982-01-01), Carpenter

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