PRESSURE OIL SUPPLY SYSTEM HAVING A PRESSURE COMPENSATING VALVE

Title:

PRESSURE OIL SUPPLY SYSTEM HAVING A PRESSURE COMPENSATING VALVE

Document Type and Number:

WIPO Patent Application WO/1994/010454

Kind Code:

A1

Abstract:

A direction control valve device comprising a direction control valve made by providing in a valve block a main spool for establishing and/or shutting off communication between an input port, first and second actuator ports and first and second tank ports, and a pressure compensating valve made by providing in said valve block a check valve section and a pressure reducing valve section so that pressure oil in a pump port is pressure compensated with loading pressure to thereby be supplied to said input port, wherein a plurality of said valve blocks are connected to each other and respective first and second tank ports are made to communicate with respective pump ports, wherein a main input port is connected to one of said pump ports, and wherein one of said first and second tank ports is connected to a main tank port.

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Inventors:

ISHIHAMA KAZUYOSHI (JP)
IKEI KAZUNORI (JP)
UEHARA KAZUO (JP)

Application Number:

PCT/JP1993/001534

Publication Date:

May 11, 1994

Filing Date:

October 22, 1993

Export Citation:

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Assignee:

KOMATSU MFG CO LTD (JP)
ISHIHAMA KAZUYOSHI (JP)
IKEI KAZUNORI (JP)
UEHARA KAZUO (JP)

International Classes:

E02F9/22; F15B11/16; F15B13/00; F15B13/04; F15B13/08; (IPC1-7): F15B11/00; E02F9/22; F15B11/05; F15B11/16

Foreign References:

JPS6011706A

1985-01-22

Other References: