发明授权
- 专利标题: Multiple control valves
- 专利标题(中): 多个控制阀
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申请号: US402854申请日: 1982-07-29
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公开(公告)号: US4489644A公开(公告)日: 1984-12-25
- 发明人: Toshiaki Tsukimoto , Chiharu Matsunaga , Yutaka Hashimoto
- 申请人: Toshiaki Tsukimoto , Chiharu Matsunaga , Yutaka Hashimoto
- 申请人地址: JPX Tokyo
- 专利权人: Toshiba Kikai Kabushiki Kaisha
- 当前专利权人: Toshiba Kikai Kabushiki Kaisha
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX56-117256 19810806; JPX56-117257 19810806
- 主分类号: F15B13/06
- IPC分类号: F15B13/06 ; F15B13/08
摘要:
A multiple control valve for operating a civil construction machine or the like comprises a valve body, at least two parallel direction change-over plungers assembled in the valve body, by-pass passages and fluid supply passages formed in the valve body and operatively communicated with the plungers for feeding fluid from an external source to the plungers. One of plungers disposed most downstream side of the multiple control valve is provided with inner passages arranged on both sides thereof, a passage crossing the plunger, an axial passage having one end closed and the other end opened towards one of the inner passages, and a lateral port communicated with the inner passage. The crossing passage is communicated with the axial passage at a portion near the closed end thereof. When the most downstream side plunger is displaced from its neutral position in a direction to operate a corresponding actuator for operating a mechanism of the machine in a predetermined direction, the crossing passage intercommunicates with one of the supply passage and the lateral port intercommunicates with the by-pass passage and when the most downstream side plunger and another plunger disposed upstream side thereof are simultaneously displaced in the direction described above, only the connection between the crossing passage and one of the supply passages is established.
公开/授权文献
- US5036167A Board for hybrid integrated circuit 公开/授权日:1991-07-30