Fluid pressure relief valve with variable opening pressure

Details Fluid pressure relief valve with variable opening pressure Fluid pressure relief valve with variable opening pressure

1999-01-21

2000-04-04

Bennett, Henry

Toilet

Toothpick

Having thread holder

137537, 137540, F16K 1500

Patent

active

060448490

ABSTRACT:
A fluid pressure release valve includes an aperture through which fluid can flow. An element is movable to unseal the aperture and to open the valve when a force exerted by the fluid in the valve exceeds a predetermined force. An electromagnetic biasing arrangement biases the element to seal the aperture and hold the valve closed against the escape of fluid with the predetermined force. The applied bias is variable according to changes in the sensed position of the element and a monitoring arrangement, cooperable with the solenoid, monitors the changes in its electrical properties as a shaft moves in the monitoring arrangement, indicating a change in position of the element. The monitoring arrangement also varies the bias to reduce the predetermined force responsive to the sensed change in position of the element indicating an opening of the valve.

REFERENCES:
patent: 3043333 (1962-07-01), Kugler
patent: 3884260 (1975-05-01), Hilgert
patent: 3996963 (1976-12-01), Winquist
patent: 4681298 (1987-07-01), Bodine et al.
patent: 4827975 (1989-05-01), Steiger
patent: 4984549 (1991-01-01), Mesenich
patent: 4993456 (1991-02-01), Sule
patent: 5020774 (1991-06-01), Christianson
patent: 5027871 (1991-07-01), Guenther
patent: 5501425 (1996-03-01), Reinicke et al.
patent: 5592905 (1997-01-01), Born
patent: 5593133 (1997-01-01), Hunnicutt
patent: 5860631 (1999-01-01), Feigel

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