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Patent Searching and Data


Title:
HYDRAULIC SYSTEM AND ITS STARTING METHOD
Document Type and Number:
Japanese Patent JP2000250636
Kind Code:
A
Abstract:

To provide a hydraulic system and its starting method which can minimize the shaking of a hydraulic actuator that is caused when the hydraulic system is started.

A hydraulic system 10 includes a hydraulic unit 20, a hydraulic cylinder 40, a hydraulic control servo valve 60 and a controller 80 which controls the valve 60. When the unit 20 is turned on when the system 10 is started, the unit 20 starts to generate the pressure. An operating pressure variable relief valve 100 is placed between the output side of the unit 20 and a reserver tank and controls the servo valve supply pressure, i.e., the pressure of the hydraulic oil that is supplied to the hydraulic input part of the valve 60 right after the unit 20 started the generation of pressure.


Inventors:
Uno, Hiroshi
Application Number:
JP1999000052381
Publication Date:
September 14, 2000
Filing Date:
March 01, 1999
Export Citation:
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Assignee:
SAGINOMIYA SEISAKUSHO INC
International Classes:
F15B9/09; F15B11/00; F15B13/043; G05D16/20; (IPC1-7): G05D16/20; F15B9/09; F15B11/00; F15B13/043
Attorney, Agent or Firm:
瀧野 秀雄 (外1名)