Commonly housed directional and pressure compensation valves for

Details Commonly housed directional and pressure compensation valves for Commonly housed directional and pressure compensation valves for

1989-11-07

1991-06-25

Look, Edward K.

Power plants

Pressure fluid source and motor

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

91446, 91517, 91518, 137596, 13759613, F16K 1100, F15B 1116

Patent

active

050256254

ABSTRACT:
A hydraulic control system for driving a plurality of actuators basically includes directional control valves, and pressure compensation valves, and at least one detection valve, the directional valves and the pressure compensation valves both corresponding in number to the actuators. These valves are mounted or incorporated in a body. The body has a plurality of regions corresponding in number to the actuators. Each of the regions of the body has a first hole, and a second hole substantially perpendicularly intersecting the first hole. A load pressure chamber for receiving a load pressure of the corresponding actuator is formed at the intersection between the first and second holes of each region. A spool of the directional control valve is received in the first hole. A balance piston of the pressure compensation valve is received in that portion of the second hole disposed on one side of the load pressure chamber. The detection valve is received in that portion of the second hole disposed on the other side of the load pressure chamber.

REFERENCES:
patent: 3970108 (1976-06-01), Ailshie
patent: 4154262 (1979-05-01), Blume et al.
patent: 4617854 (1986-10-01), Kropp
patent: 4688600 (1987-08-01), Kreth et al.
patent: 4709724 (1987-12-01), Williams
patent: 4739617 (1988-04-01), Kreth et al.
patent: 4967557 (1990-11-01), Izumi et al.

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