发明名称 |
DIRECTIONAL CONTROL VALVE |
摘要 |
<p>The invention relates to a directional control valve which comprises a first actuator port connected to a lifting side chamber of a cylinder of a working machine, a second actuator port connected to a lowering side chamber of the cylinder of the working machine, a regeneration passage for alloying the second actuator port communicate with a regeneration port through a check valve, and a main spool adapted to move in one direction to thereby supply a pressure oil to the second actuator port and to allow the first actuator port to communicate with a tank port and the regeneration port. The directional control valve is characterized in the provision of a switching means for switching a maximum distance of movement of the main spool in one direction in a plurality of stages. <IMAGE></p> |
申请公布号 |
EP0777056(A4) |
申请公布日期 |
1998.11.25 |
申请号 |
EP19950927963 |
申请日期 |
1995.08.03 |
申请人 |
KOMATSU LTD. |
发明人 |
ISHIZAKI, NAOKI;TAKANO, TOSHIRO |
分类号 |
E02F9/22;F15B11/024;F15B11/12;F15B13/02;(IPC1-7):F15B11/024;F15B11/08;F15B11/04 |
主分类号 |
E02F9/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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