Title:
OPERATING DEVICE FOR DIRECTIONAL CONTROL VALVE
Document Type and Number:
WIPO Patent Application WO/1998/037330
Kind Code:
A1
Abstract:
An operating device for a directional control valve, comprising a meter-in control valve (3) for establishing or intercepting communication of a hydraulic pressure source (1) with one chamber (5) of an actuator (4) and a meter-out control valve (7) for establishing or intercepting communication of the other chamber (6) of the actuator and a tank (8), characterized in that the operating device is provided with an electromagnetic valve (13) for meter-in use which supplies pressure oil for switching the meter-in control valve and an electromagnetic valve (12) for meter-out use which supplies pressure oil for switching the meter-out control valve, and the input pressure to one of the meter-in electromagnetic valve and the meter-out electromagnetic valve is made the output pressure from the other.
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Inventors:
Yoshida, Nobumi (Oyama Factory of KOMATSU LTD, 400 Yokokurashinde, Oyama-shi Tochigi, 323-0819, JP)
Application Number:
PCT/JP1998/000661
Publication Date:
August 27, 1998
Filing Date:
February 17, 1998
Export Citation:
Assignee:
KOMATSU LTD. (3-6 Akasaka 2-chome, Minato-ku, Tokyo, 107-0052, JP)
Yoshida, Nobumi (Oyama Factory of KOMATSU LTD, 400 Yokokurashinde, Oyama-shi Tochigi, 323-0819, JP)
Yoshida, Nobumi (Oyama Factory of KOMATSU LTD, 400 Yokokurashinde, Oyama-shi Tochigi, 323-0819, JP)
International Classes:
F15B11/08; F15B11/042; F15B11/044; (IPC1-7): F15B11/08
Attorney, Agent or Firm:
Hamamoto, Tadashi (Bansui Building, 5-16 Toranomon 1-chom, Minato-ku Tokyo, 105-0001, JP)
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