发明授权
- 专利标题: Hydraulic apparatus with pressure compensating valves
- 专利标题(中): 带压力补偿阀的液压装置
-
申请号: US793395申请日: 1992-01-09
-
公开(公告)号: US5271227A公开(公告)日: 1993-12-21
- 发明人: Teruo Akiyama , Kiyoshi Shirai , Naoki Ishizaki , Koji Yamashita , Shinichi Shinozaki
- 申请人: Teruo Akiyama , Kiyoshi Shirai , Naoki Ishizaki , Koji Yamashita , Shinichi Shinozaki
- 申请人地址: JPX Tokyo
- 专利权人: Kabushiki Kaisha Komatsu Seisakusho
- 当前专利权人: Kabushiki Kaisha Komatsu Seisakusho
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX2-122951 19900515; JPX2-122955 19900515; JPX2-122956 19900515
- 主分类号: E02F9/22
- IPC分类号: E02F9/22 ; F15B11/16 ; F15B13/04 ; F16D31/02 ; F15B11/08
摘要:
In the hydraulic apparatus (1) according to a first aspect of the present invention, mid-pressures between the inlet side and outlet side pressures of a first and a second pressure compensating valves (4, 4') are permitted to act on the flow rate decreasing side pressure receiving surfaces (4b, 4b') thereof through first and second mid-pressure supplying means (13, 13'), thereby restraining operational error and malfunction of the pressure compensating valves (4, 4'). In the hydraulic apparatus (20) according to a second aspect of the present invention. when actuating valves are made to assume neutral position, holding pressures of hydraulic actuators (5, 5') are permitted to act on flow rate decreasing side pressure receiving surfaces (4b, 4b') of pressure compensating valves (4), (4') so that spools of the pressure compensating valves are held at compensating position, thereby improving the response of the hydraulic actuators (5, 5') to lever actuation.
公开/授权文献
- US4645815A Heat curable organopolysiloxane compositions 公开/授权日:1987-02-24