Actuator average pressure maintenance in closed loop system

Details Actuator average pressure maintenance in closed loop system Actuator average pressure maintenance in closed loop system

1975-04-16

1976-05-11

Geoghegan, Edgar W.

Power plants

Pressure fluid source and motor

Condition responsive control of pump or motor displacement

60446, 60464, 60486, F16H 3946

Patent

active

039553698

ABSTRACT:
A closed loop hydraulic control system for a piston type fluid actuator maintains an average pressure on the piston during all operating conditions of the actuator. The system includes a first pump which controls the actuator and a makeup pump which supplies additional fluid to compensate for fluid losses in the system. An average pressure maintaining valve sums the fluid pressure on each side of the actuator and supplies additional fluid from the makeup pump to maintain a predetermined average pressure on the actuator piston.

REFERENCES:
patent: 3214911 (1965-11-01), Kempson
patent: 3713291 (1973-01-01), Kubik

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