Hydraulic control valve system with pressure compensator

Details Hydraulic control valve system with pressure compensator Hydraulic control valve system with pressure compensator

1999-03-17

2000-08-08

Michalsky, Gerald A.

Power plants

Pressure fluid source and motor

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

60452, 13759613, 13762568, F15B 1308

Patent

active

060984031

ABSTRACT:
An improved pressure-compensated hydraulic system includes a separate valve section which feeds hydraulic fluid from a variable displacement pump to one of several hydraulic actuators. Each valve section has a main valve spool and a pressure compensating poppet. The main valve spool has a metering orifice that controls the flow of fluid to the actuator. The poppets in the valve sections collectively apply a pressure to the pump pressure control input which is a function of the greatest to a load pressure among the hydraulic actuators.

REFERENCES:
patent: 5067389 (1991-11-01), St. Germain
patent: 5579642 (1996-12-01), Wilke et al.
patent: 5715865 (1998-02-01), Wilke
patent: 5791142 (1998-08-01), Layne et al.
patent: 5890362 (1999-04-01), Wilke

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