Pressure-compensated directional control valve

Details Pressure-compensated directional control valve Pressure-compensated directional control valve

1979-12-18

1981-12-22

Michalsky, Gerald A.

Motors: expansible chamber type

Fluid supply through diverse paths to single expansible chamber

One path includes restriction

91516, 91517, 91518, 13759613, F15B 1306, F15B 1309

Patent

active

043064884

ABSTRACT:
A pressure-compensated directional control valve assembly suitable for use in hydraulic power steering systems of off-highway working vehicles. The valve assembly integrally comprises a control valve for controlling communication between two engine-driven pumps and a steering cylinder, and a pressure compensator valve for controlling the fluid pressure delivered from the pumps to the control valve. Constantly comparing its outgoing fluid pressure with the fluid pressure at control ports of the control valve, the pressure compensator valve delivers to the control valve the pressurized fluid from one or both of the pumps. Any excess of the pressurized fluid is directed from the pressure compensator valve to, for example, an implement hoist cylinder of the work vehicle.

REFERENCES:
patent: 3455210 (1969-07-01), Allen

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