发明名称 |
Hydraulic circuit of construction machine |
摘要 |
A throttle path for returning a part of pilot oil to a tank is formed by a tank path provided in a valve block of a control valve and a notch provided in a spool thereof. The above path is opened within a section from a vicinity of a stroke where a hydraulic actuator starts moving to right before a stroke end among a spool stroke of the control valve. An opening area of the above path is slowly reduced in accordance with an increase in the stroke at a final phase of the section. |
申请公布号 |
US8151688(B2) |
申请公布日期 |
2012.04.10 |
申请号 |
US20080339813 |
申请日期 |
2008.12.19 |
申请人 |
SAOTOME YOSHIMI;SHIRAGA NORIFUMI;KOBELCO CONSTRUCTION MACHINERY CO., LTD. |
发明人 |
SAOTOME YOSHIMI;SHIRAGA NORIFUMI |
分类号 |
F15B13/042;F16D31/02 |
主分类号 |
F15B13/042 |
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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