Hydraulic actuator synchronization apparatus and system

Details Hydraulic actuator synchronization apparatus and system Hydraulic actuator synchronization apparatus and system

1987-07-02

1989-05-02

Garrett, Robert E.

Motors: expansible chamber type

Relatively movable working members with one having motive...

Synchronizing in response to sensed difference in positions

91510, 91515, 91517, 91518, 91528, 91530, F01B 2504, F15B 1122, F15B 1300

Patent

active

048257486

ABSTRACT:
A system reduces force fight between hydraulic actuators (22, 24) operated on independent hydraulic circuits (29, 49) which position a control surface (20) of an aircraft. Each circuit includes a hydraulic supply (30, 50). A pressure equalization valve (70) is connected to first sides (42, 62) of the actuators. In the event of a pressure imbalance, a spool (82) shifts in the pressure equalization valve. Movement of the spool enables fluid from the circuit supply to be delivered through the equalization valve to the actuator at the lower pressure, rapidly eliminating the imbalance.

REFERENCES:
patent: 2270943 (1942-01-01), Freundel et al.
patent: 2423264 (1947-07-01), Stephens
patent: 2969647 (1961-01-01), Raymond
patent: 3262740 (1966-07-01), Stockwell
patent: 3355993 (1967-12-01), Williamson
patent: 4599856 (1986-07-01), Araki et al.

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