Valve closing device

Details Valve closing device Valve closing device

2004-10-05

2009-10-13

Evans, Robin O (Department: 3753)

Fluid handling

Line condition change responsive valves

Direct response valves

C251S303000, C251S337000, C166S332800

Reexamination Certificate

active

07600534

ABSTRACT:
An apparatus capable of moving a shiftable valve member into a closed position, the shiftable valve member mounted in a valve housing having a bore and being moveable between at least one open and at least one closed position relative to the bore, includes at least one elastically deformable member that extends at least partially around the circumference of the bore and is disposed at least partially in a cavity in the valve housing. Each elastically deformable member is elongated, has first and second ends and is connected to the shiftable valve member at one location and to the valve housing at least one other location. Each elastically deformable member is torsionally loaded to provide biasing, closing force to the shiftable valve member to assist in moving the shiftable valve member into a closed position and retaining it in the closed position.

REFERENCES:
patent: 3640306 (1972-02-01), Vogt
patent: 4027695 (1977-06-01), Schnatmeyer et al.
patent: 4196745 (1980-04-01), Schutzer
patent: 5137090 (1992-08-01), Hare et al.
patent: 6328062 (2001-12-01), Williams et al.
patent: 601710 (1978-07-01), None
patent: 2345742 (2000-07-01), None
patent: 2388383 (2003-11-01), None

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