Passive, double acting, vacuum actuated vent valve

Details Passive, double acting, vacuum actuated vent valve Passive, double acting, vacuum actuated vent valve

2007-11-27

2007-11-27

Rivell, John (Department: 3753)

Fluid handling

Ambient condition change responsive

Atmospheric

C137S078500

Reexamination Certificate

active

10933093

ABSTRACT:
A valve is provided for use on a control moment gyroscope (CMG) having a housing separating an internal environment from an external environment. The valve includes a valve housing, a valve element, and bellows. The valve housing is configured to couple to the CMG housing and includes an inner surface defining a cavity, an outer surface, and an opening extending therebetween. The valve element is disposed within the valve housing cavity and is movable between a closed position, in which fluid is prevented from flowing through the valve housing opening, and an open position, in which fluid may flow through the valve housing opening. The bellows is disposed within the valve housing and coupled to the valve element and has an internal chamber. The bellows selectively moves the valve element closed and open in response to a differential pressure between the bellows internal chamber and the valve housing cavity.

REFERENCES:
patent: 1557822 (1925-10-01), Foulk
patent: 2168536 (1939-08-01), Olshevsky
patent: 2902916 (1959-09-01), Smith
patent: 2963034 (1960-12-01), Cummins
patent: 2969801 (1961-01-01), Cummins
patent: 3709242 (1973-01-01), Chase
patent: 3804167 (1974-04-01), Swift
patent: 5743292 (1998-04-01), Robinson
patent: 4103769 (1992-06-01), None
Vent Valve Specification Sheet, Dec. 19, 1978.
PCT International Search Report PCT/US2005/031498, Nov. 30, 2006.

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