| 发明名称 |
HYDRAULIC PILE DRIVER |
| 摘要 |
<p>In a hydraulic pile driver (10), the lifting cylinder (34) acting on the driving weight (12) has an attached position indicator (46, 50), which produces a signal corresponding to the momentary position of the piston rod (32) of the lifting cylinder (34). This signal is used for reversing a 4/3-valve, by which the two working chambers of the lifting cylinder can be connected to a pressure line or return line.</p> |
| 申请公布号 |
CA1268343(A) |
申请公布日期 |
1990.05.01 |
| 申请号 |
CA19870532922 |
申请日期 |
1987.03.25 |
| 申请人 |
DELMAG MASCHINENFABRIK REINHOLD DORNFELD G.M.B.H. & CO |
发明人 |
HENNECKE, RUDOLF;KEHRBERGER, ACHIM |
| 分类号 |
E02D7/10;(IPC1-7):E02D7/08 |
主分类号 |
E02D7/10 |
| 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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