Power transmission

Details Power transmission Power transmission

1982-02-08

1984-10-09

Scott, Samuel

Motors: expansible chamber type

With motive fluid valve

Pilot valve

91446, 60461, F15B 1108

Patent

active

044754426

ABSTRACT:
A hydraulic control system comprising a hydraulic actuator having opposed openings adapted to alternately function as inlets and outlets for moving the element of the actuator in opposite directions, a pump for supplying fluid to said actuator, a pilot operated meter-in valve to which the fluid from the pump is supplied for controlling the direction of movement of the actuator, and pilot operated meter-out valves associated with each opening of the actuator for controlling the flow out of said actuator. The pressure of fluid being supplied to the actuator by the meter-in valve is sensed and caused to produce a force opposing the movement of the meter-out valve controlling flow from the actuator.

REFERENCES:
patent: 2816420 (1957-12-01), Walsh
patent: 3802318 (1974-04-01), Sibbald
patent: 3991571 (1976-11-01), Johnson
patent: 4201052 (1980-05-01), Breeden et al.
patent: 4250794 (1981-02-01), Haak et al.

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