Motors: expansible chamber type – Plural relatively movable or rigidly interconnected working... – Condition responsive means for modifying working member...
Patent
1998-03-02
2000-06-13
Ryznic, John E.
Motors: expansible chamber type
Plural relatively movable or rigidly interconnected working...
Condition responsive means for modifying working member...
91532, F15B 1100
Patent
active
060735368
ABSTRACT:
An automotive hydraulic system having a power steering unit of a vehicle connected in parallel with an externally mounted, hydraulic-cylinder-powered accessory, such as a liftgate, snow plow or dump bed. The vehicle's power steering pump supplies the required hydraulic fluid to the power steering unit and to a cylinder in the accessory, simultaneously in the preferred embodiment and alternately in another. A preferred valve assembly is disclosed which includes a priority flow control valve and a three-position, four-way accessory control valve mounted together in a manifold designed for connection to the vehicle's power steering pump, power steering unit, and hydraulic fluid reservoir, and to a double-acting hydraulic cylinder in the accessory.
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