发明名称 |
Bohrwerkzeug |
摘要 |
The invention relates to a drilling tool, especially a rock drill, comprising a drill head, a clamping stem, and a helical stem situated in-between. The aim of the invention is to provide an economical drilling tool. To this end, the base element is a polygonal rod which is twisted in the area of the helical stem.
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申请公布号 |
DE19722517(A1) |
申请公布日期 |
1998.12.03 |
申请号 |
DE19971022517 |
申请日期 |
1997.05.30 |
申请人 |
HAWERA PROBST GMBH, 88212 RAVENSBURG, DE |
发明人 |
PEETZ, WOLFGANG, DIPL.-ING., 88273 FRONREUTE, DE |
分类号 |
E21B10/44;(IPC1-7):B23B51/02;B28D1/14 |
主分类号 |
E21B10/44 |
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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