Power plants – Pressure fluid source and motor – Having condition responsive control in a system of distinct...
Patent
1983-01-21
1989-04-11
Look, Edward K.
Power plants
Pressure fluid source and motor
Having condition responsive control in a system of distinct...
60422, 60430, F16D 3102
Patent
active
048194301
ABSTRACT:
A hydraulic fluid circuit system is provided for use in a vehicle and having a priority and a second fluid circuit therein. A variable displacement pump is the primary fluid source for the priority circuit, and a fixed displacement pump is the primary fluid source for the second fluid circuit. A demand valve responsive to differential fluid pressure between the priority circuit and the output of the variable displacement pump selectively switches increasing amounts of output from the fixed displacement pump into the priority circuit in proportion to the output of the variable displacement pump. The demand valve includes a three positioned spool valve. The priority circuit may include a hydraulic steering system, and the second fluid circuit may include an implement or accessory circuit.
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Japanese Abstract 56-70106, Nov. 1979.
Hydreco, Inc.
Look Edward K.
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