Power transmission

Details Power transmission Power transmission

F - Mech Eng,Light,Heat,Weapons

15

B

138/63

F15B 11/00 (2006.01) F15B 13/02 (2006.01)

Patent

CA 1172136

Abstract of the Disclosure 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 the actuator, and a meter-in valve to which the fluid from the pump is supplied. The meter-in valve is pilot controlled by alternately supplying fluid at pilot pressure to the meter-in valve for controlling the direc- tion of movement of the actuator. A pair of lines extend from the meter-in valve to the respective openings of the actuator. Valves are positioned between a tank passage and each opening of the actuator for controlling the flow of fluid between the actuator and the tank passage; and at least one of these valves is normally open and pilot operated.

408017

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