Servo actuator

Details Servo actuator Servo actuator

1989-09-08

1991-04-16

Look, Edward K.

Motors: expansible chamber type

With motive fluid valve

Valved piston

91399, 91440, 91 1, 92 8, F15B 1108

Patent

active

050073273

ABSTRACT:
A hydraulic servo actuator adapted to control a driven member in accordance with an operation of a servo circuit through which servo oil flows comprises a main cylinder and an associated piston, associated piston being reciprocable within the cylinder and the main cylinder divided by the piston into a first chamber and a second chamber which are adapted to be in fluid communication with the servo oil, a damper means provided within the main piston for dampening reciprocating movement of the main piston. A hydraulic servo actuator also includes a throttle means for imparting a predetermined restriction to the servo oil that flows between the second chamber and the damper means along the predetermined passage formed within the cylinder.

REFERENCES:
patent: 2755777 (1956-07-01), Gerwig et al.
patent: 3118349 (1964-01-01), Combs
patent: 3447424 (1969-06-01), Billings
patent: 4041840 (1977-08-01), Zirps
patent: 4386552 (1983-06-01), Foxwell
patent: 4809587 (1989-03-01), Kawahara et al.

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