Motors: expansible chamber type – Working member position responsive motive fluid control
Patent
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
Grant John W.
Hicks Leon E.
Peterson Wayne A.
Watts Loyal O.
Caterpillar Tractor Co.
Maslousky Paul E.
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