Combination ball valve and pressure relief valve assembly

Details Combination ball valve and pressure relief valve assembly Combination ball valve and pressure relief valve assembly

1995-11-15

1996-12-24

Lee, Kevin

Fluid handling

Systems

Flow path with serial valves and/or closures

1374938, F16K 1518

Patent

active

055865798

ABSTRACT:
To provide pressure relief in a fluid line of a fluidic circuit, the ball element of a shutoff valve incorporates a tube that is aligned with a pair of valve ports when the ball is in the closed valve position. A miniature check valve, positioned in the tube, operates, depending on its orientation, to check fluid flow through the tube between the valve ports in one direction and to vent fluid through the tube in the opposite direction in response to excessive fluid pressure. In an alternative embodiment, a pair of tubes are incorporated into the ball valve element, with the check valves therein oriented in opposed directions to provide bidirectional pressure relief between the valve ports.

REFERENCES:
patent: 2570937 (1951-10-01), Gash
patent: 3146792 (1964-09-01), Donnelly et al.
patent: 3363650 (1968-01-01), Scaramucci
patent: 4736771 (1988-04-01), McCafferty
patent: 4932436 (1990-06-01), Kanemaru
patent: 5373868 (1994-12-01), Rodriquez
patent: 5437307 (1995-08-01), Cianfrocca, II

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