Motors: expansible chamber type – Relatively movable working members with one having motive... – One working member oppositely biased by another
Patent
1977-08-31
1979-03-13
Cohen, Irwin C.
Motors: expansible chamber type
Relatively movable working members with one having motive...
One working member oppositely biased by another
91360, 92 62, F01B 100, F01B 700
Patent
active
041435842
ABSTRACT:
An electrohydraulic actuator has a power piston which is controlled from movement between the ends of its travel for performing work by servo control valve. When the actuator is not performing work, the power piston is abutted on one side by a pressure positioned centering piston which prevents the movement in one direction. High pressure fluid operates on the other side of the power piston to prevent movement in the other direction so that the power piston is centered in the cylinder and cannot be moved by external forces.
REFERENCES:
patent: 2478790 (1949-08-01), Stephens
patent: 2918902 (1959-12-01), Robinson et al.
patent: 3149537 (1964-09-01), Fink
Cohen Irwin C.
General Motors Corporation
Scherer Donald F.
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