发明名称 |
Pile extraction apparatus |
摘要 |
Pile extraction apparatus having a clamping device for clamping engagement with a pile. The device is suspended from a section of casing pipe by way of a universal joint. In this way the extraction apparatus may be raised and lowered by a commercially available pipe extraction machine.
|
申请公布号 |
US4248550(A) |
申请公布日期 |
1981.02.03 |
申请号 |
US19790013811 |
申请日期 |
1979.02.22 |
申请人 |
STAHL-UND APPARATEBAU HANS LEFFER GMBH |
发明人 |
BLASCHKE, KURT;ROOB, JOSEF |
分类号 |
E02D9/02;(IPC1-7):E02D9/02 |
主分类号 |
E02D9/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|