发明名称 |
Hydraulic circuit for working machine |
摘要 |
In an oil hydraulic circuit comprising a pilot operated type control valve for performing control of pressure oil supply to a hydraulic actuator and a pilot valve gear for outputting a pilot pressure to this control valve, in order to improve operationality in a case where a fine operation is performed, the pilot valve gear (8) comprises a first pressure controller (9) for outputting a pilot pressure corresponding to the degree of operation with an operating lever (12) and a second pressure controller (10) for reducing the pilot pressure outputted from this first pressure control means based on a signal from an operating speed changeover switch 16 and outputting the reduced pilot pressure to the control valve 5.
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申请公布号 |
US2003000374(A1) |
申请公布日期 |
2003.01.02 |
申请号 |
US20020181154 |
申请日期 |
2002.07.16 |
申请人 |
IGA MAKOTO;SHIMADA YOSHIYUKI |
发明人 |
IGA MAKOTO;SHIMADA YOSHIYUKI |
分类号 |
E02F9/22;F15B11/08;F15B11/16;F15B13/042;F15B21/08;(IPC1-7):F15B11/08 |
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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