Fluid handling – Systems – Supply and exhaust
Patent
1996-11-13
1998-02-10
Michalsky, Gerald A.
Fluid handling
Systems
Supply and exhaust
60427, 60452, 91446, 91518, 91531, F15B 1308
Patent
active
057158657
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, multi-ported 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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HUSCO International Inc.
Michalsky Gerald A.
LandOfFree
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