Operating valve assembly with pressure compensation valve

Details Operating valve assembly with pressure compensation valve Operating valve assembly with pressure compensation valve

1995-09-06

1997-09-16

Lopez, F. Daniel

Power plants

Pressure fluid source and motor

Having condition responsive control in a system of distinct...

60452, F16D 3102

Patent

active

056668082

ABSTRACT:
An operating valve assembly incorporates a pressure compensation valve and is capable of contributing down-sizing of a hydraulic circuit. The valve assembly includes an operating valve, compensation valves and a load pressure detecting portion. A valve body of the operating valve defines a spool bore extending laterally through the valve body at a vertically intermediate portion of the valve body, a load pressure detecting port at a laterally intermediate portion of the spool bore, and a respective pump port, actuator port and tank port at each side of the load pressure detecting port. The operating valve also includes a spool within the spool bore. The pressure compensation valves are arranged at left and right sides of an upper portion of the valve body and the load pressure detecting portion, for supplying load pressure to the load pressure detecting port, is formed in the spool.

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patent: 3602243 (1971-08-01), Holt et al.
patent: 4425759 (1984-01-01), Krusche
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patent: 4787294 (1988-11-01), Bowden
patent: 4986071 (1991-01-01), Voss et al.
patent: 5271227 (1993-12-01), Akiyama et al.
patent: 5273069 (1993-12-01), Akiyama et al.
patent: 5535663 (1996-07-01), Yamashita et al.

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