Hydraulic control circuit with remotely controlled dual pressure

Details Hydraulic control circuit with remotely controlled dual pressure Hydraulic control circuit with remotely controlled dual pressure

1974-06-24

1976-02-10

Maslousky, Paul E.

Motors: expansible chamber type

Working member position responsive motive fluid control

91451, F15B 1520, F15B 1108, F15B 13042

Patent

active

039371280

ABSTRACT:
Multiple embodiments of a hydraulic control circuit for a double-acting hydraulic motor to provide fluid at a relatively high pressure for operating the motor in a selected direction and otherwise providing operating fluid to the motor at a relatively low pressure, the control circuit including a dual pressure relief valve which is operatively responsive to the motor or an implement positioned by the motor to provide the two operating pressures. An additional dual pressure relief valve regulates the flow of exhaust fluid from one side of the motor to allow controlled response of the motor to external forces. The hydraulic control circuit of the present invention is preferably contemplated for operating a push-pull coupling to permit selective tandem operation of two vehicles.

REFERENCES:
patent: 2073070 (1937-03-01), Lewis
patent: 2477710 (1949-08-01), Worstell
patent: 2805447 (1957-09-01), Voges
patent: 3537356 (1970-11-01), Odell

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