发明公开
- 专利标题： Pilot operated directional control valve having position detecting function
- 专利标题（中）： 先导式与位置检测换向阀
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申请号： EP00305300.6申请日： 2000-06-23
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公开(公告)号： EP1069318A3公开(公告)日： 2002-05-08
- 发明人: Hayashi, Bunya, SMC Corp. Tsukuba Technical Center , Ishikawa, Makoto, SMC Corp. Tsukuba Tech. Center
- 申请人： SMC CORPORATION
- 申请人地址： 16-4, Shinbashi 1-chome Minato-ku, Tokyo JP
- 专利权人： SMC CORPORATION
- 当前专利权人： SMC CORPORATION
- 当前专利权人地址： 16-4, Shinbashi 1-chome Minato-ku, Tokyo JP
- 代理机构： Findlay, Alice Rosemary
- 优先权： JP19777899 19990712
- 主分类号： F15B13/04
- IPC分类号： F15B13/04 ; F15B15/28
摘要：
The present invention provides a pilot operated directional control valve having a position detecting function which is capable of detecting operating positions of a valve member via the piston for driving the valve member. To achieve this, a magnet 21 is installed on the portion of a piston 12a which is abutted against one end of a spool 6 and which is adjacent to a breathing chamber 9 sealed off from a pilot pressure chamber 13a. A magnetic sensor 21 for detecting the magnetism from the magnet 21 is mounted in the casing 4 on the portion opposite to the magnet 21.
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