发明名称 |
Drilling tool |
摘要 |
The drilling tool (1) has a drilling segment (4) and a shaft segment (3) with a hexagonal cross section for a torsionally rigid connection with a conventional driving machine. A combination drilling tool having different functional segment on opposite ends thereof for performing two different and sequential work operations.
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申请公布号 |
US5975815(A) |
申请公布日期 |
1999.11.02 |
申请号 |
US19960760912 |
申请日期 |
1996.12.06 |
申请人 |
ZIERPKA, EVA MARIA |
发明人 |
ZIERPKA, KATRIN;ZIERPKA, EVA-MARIA |
分类号 |
B23B51/00;B25B21/00;B25B23/00;B25F3/00;(IPC1-7):B23B31/117 |
主分类号 |
B23B51/00 |
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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