Power plants – Pressure fluid source and motor – Condition responsive control of motive fluid flow
Patent
1989-12-14
1991-09-10
Look, Edward K.
Power plants
Pressure fluid source and motor
Condition responsive control of motive fluid flow
60427, 60484, 60486, 60494, F16D 3102
Patent
active
050463110
ABSTRACT:
A hydraulic control system includes a pump, a hydraulic cylinder and a cylinder hydraulic circuit interconnecting the pump and the cylinder. The circuit includes a first hydraulic fluid line extending between the pump and the cylinder and a control valve located in the fluid line for controlling the communication of fluid between the pump and the cylinder. A second hydraulic fluid line is in fluid communication with the first line downstream from the control valve. A first relief valve is located in the second fluid line and a first shut off valve is also located in the second fluid line and interposed between the first relief valve and the first fluid line. The shut off valve is solenoid actuated to a closed position. A motor hydraulic circuit includes a third hydraulic fluid line and a solenoid actuated motor control valve for controlling the flow of fluid through the third fluid line. An interconnect system is provided for operating the first shut off valve and the motor control valve in unison.
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patent: 3949539 (1976-04-01), Cartner
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patent: 4506464 (1985-03-01), Cartner
patent: 4561341 (1985-12-01), Alkawa
patent: 4852660 (1989-08-01), Leidinger et al.
patent: 4938023 (1990-07-01), Yoshino
Look Edward K.
Mattingly Todd
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