Motors: expansible chamber type – With motive fluid valve – Relatively movable serial valves
Patent
1977-04-07
1979-09-18
Cohen, Irwin C.
Motors: expansible chamber type
With motive fluid valve
Relatively movable serial valves
91447, 1375962, F15B 1108, F15B 13042
Patent
active
041678923
ABSTRACT:
A hydraulic motor and control system therefor which includes a pump for delivering fluid to a control valve, the control valve having a Float position which connects a first end of the motor to a sump, a First position for applying fluid from the pump to power the motor in a first direction by delivering fluid to the first end of the motor via a flow path and a Second position in which the motor moves in a second and opposite direction. A conduit connects the control valve to the sump. A check valve is provided in the flow path which always allows flow therethrough towards the first end of the motor and normally blocks reverse flow therethrough and also a mechanism for opening the check valve to allow reverse flow therethrough responsive to operation of the control valve in the Float position and in the Second position.
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Cryder John R.
Dunlap, Jr. Samuel G.
Hall Gerald D.
Caterpillar Tractor Co.
Cohen Irwin C.
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