Valve control unit for hydraulic actuator

Details Valve control unit for hydraulic actuator Valve control unit for hydraulic actuator

F - Mech Eng,Light,Heat,Weapons

15

B

F15B 13/042 (2006.01) E02F 3/43 (2006.01) E02F 9/22 (2006.01) F15B 20/00 (2006.01)

Patent

CA 2133267

A valve control unit includes a main hydraulic oil circuit and a pilot oil circuit. The main circuit includes a main pump, a main valve downstream from said main pump, and a hydraulic actuator downstream from said main valve. The pilot oil circuit circulates pressurized pilot oil to control the main valve and includes a pilot oil pump, an automatic control switching valve downstream from the pilot oil pump, amanual limit switching valve downstream from the pilot oil pump, a manual control switching valve downstream from the manual limit switching valve, and a pilot oil chamber downstream from said manual control switching valve. The pilot oil chamber is located near the main valve such that the flow of pressurized pilot oil moves the main valve.

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