Actuator for a position-adjusting device, preferably for a valve

Details Actuator for a position-adjusting device, preferably for a valve Actuator for a position-adjusting device, preferably for a valve

1996-08-23

1998-03-31

Nguyen, Hoang

Motors: expansible chamber type

With motive fluid valve

Relatively movable inlet and exhaust valves for single...

91459, 91469, 13762565, 1375962, F15B 1108, E03B 100

Patent

active

057326126

ABSTRACT:
The actuator for a position-adjusting device, wherein the position-adjusting device has a stationary part, a movable part, and at least one coupling element and wherein the at least one coupling element is hydraulically movable by the actuator for coupling and decoupling the stationary part and the movable part relative to one another, has a housing and at least one valve piston arranged within the housing so as to be movable between two end positions defining an open position and a closed position of the actuator. The housing has a work connector, a pressure-relieved tank connector, and a pressure-loaded tank connector. The pressure-loaded tank connector includes a pressure-limiting valve. The pressure-relieved pressure connector during displacement of the valve piston between the two end positions communicates with the work connector until a respective one of the two end positions is almost reached. In the closed position of the actuator the work connector is connected to the pressure-loaded tank connector.

REFERENCES:
patent: 4525695 (1985-06-01), Sheng et al.
patent: 4836248 (1989-06-01), Stegmaier
patent: 4971114 (1990-11-01), Ichihashi et al.
patent: 5127435 (1992-07-01), Takata et al.
patent: 5592972 (1997-01-01), Niethammer
patent: 5598871 (1997-02-01), Sturman et al.

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