Power plants – Pressure fluid source and motor – Having condition responsive control in a system of distinct...
Patent
1995-05-26
1996-12-03
Nguyen, Hoang
Power plants
Pressure fluid source and motor
Having condition responsive control in a system of distinct...
60452, 91446, 91518, F15B 1302
Patent
active
055796427
ABSTRACT:
An improved pressure-compensated hydraulic system for feeding hydraulic fluid to one or more hydraulic actuators. A remotely located, variable displacement pump provides an output pressure equal to input pressure plus a constant margin. A pressure compensation systems requires that a load-dependent pressure be provided to the pump input through a load sense circuit. A reciprocally spooled, multiported isolator transmits the load-dependent pressure to the pump input but prevents fluid in the load sense circuit from leaving the load sense circuit and flowing through a relatively long conduit leading to the remotely located pump. In a multi-valve array, at least one valve section has a backflow-preventing shuttle valve which prevents backflow through the pressure compensation system if a main relief valve is operative.
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Hamkins Eric P.
Layne Michael C.
Pedersen Leif
Russell Lynn A.
Wilke Raud A.
HUSCO International Inc.
Nguyen Hoang
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