Safety valve

Details Safety valve Safety valve

1983-12-14

1985-07-09

Cohan, Alan

Fluid handling

Systems

With pump

251 6, 251342, 251349, F04B 4312, F16K 3158

Patent

active

045275882

ABSTRACT:
A safety valve in combination with a resilient tube for preventing the free flow of fluid through the resilient tube comprises a valve body which is connected to a valve head of generally circular cross-section which is formed with a flat peripheral land. The resilient tube is disposed over the valve head for snug fluid-sealing engagement between the inner surface of the tube and the flat land on the valve head. Also, the resilient tube is fluid sealed to the valve body for fluid communication therebetween. Stretching the resilient tube separates a portion of the inner surface of the tube from the flat land on the valve head to permit fluid flow past the valve head. When the resilient tube is unstretched, the engagement between the inner surface of the tube and the flat land of the valve head prevents free fluid flow.

REFERENCES:
patent: 384306 (1888-06-01), Bourdil
patent: 1418592 (1922-06-01), McGee
patent: 2425901 (1947-08-01), Thomas
patent: 2694379 (1954-11-01), Hein
patent: 2723678 (1955-11-01), Wilson
patent: 3384113 (1968-05-01), Pennisi
patent: 3692071 (1972-09-01), Begleiter
patent: 3717174 (1973-02-01), DeWall
patent: 3759289 (1973-09-01), DeWall
patent: 3800799 (1974-04-01), McWhorter
patent: 3802662 (1974-04-01), Viguier
patent: 3865133 (1975-02-01), Alford
patent: 3938909 (1976-02-01), Willock
patent: 3955594 (1976-05-01), Snow
patent: 3977409 (1976-08-01), Brendling
patent: 4056116 (1977-11-01), Carter et al.
patent: 4142845 (1979-03-01), Lepp et al.
patent: 4357959 (1972-11-01), Shetler

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