发明名称 |
Bergborrverktyg för slående borrning samt del ingående i sagda bergborrverktyg |
摘要 |
A rock drilling tool includes a pilot bit screw threaded into a front end of a drill rod. A reamer is mounted on the outside of the pilot bit. The reamer includes a central opening having a front portion and a rear portion. The front portion is connected to the pilot bit, and the rear portion constitutes a stiffening sleeve which extends around the outside of the drill rod. |
申请公布号 |
SE9800969(L) |
申请公布日期 |
1999.09.24 |
申请号 |
SE19980000969 |
申请日期 |
1998.03.23 |
申请人 |
SANDVIK AB |
发明人 |
LINDGREN DANIEL;LILJEBRAND PER-OLOV;LINDSTROEM HAAKAN |
分类号 |
E21B10/40;(IPC1-7):E21B10/26 |
主分类号 |
E21B10/40 |
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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