| 发明名称 |
Sänkborrhammare där ytterröret helt omsluter en medbringare |
| 摘要 |
The present invention relates to an arrangement pertaining to down-the-hole hammers in which a driver (7) is adapted to transfer torsion forces between a rotating outer tube (10) and a drill bit (1) of the hammer, wherein the outer tube (10) surrounds all of the driver (7). |
| 申请公布号 |
SE523946(C2) |
申请公布日期 |
2004.06.08 |
| 申请号 |
SE20010004377 |
申请日期 |
2001.12.21 |
| 申请人 |
ATLAS COPCO SECOROC AB |
发明人 |
KARL AXEL STJERNSTROEM;THOMAS GREIJER |
| 分类号 |
E21B4/20;E21B17/046;(IPC1-7):E21B4/14 |
主分类号 |
E21B4/20 |
| 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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