发明名称 |
Drill bit with multi-cutting edges |
摘要 |
The drill bit consists of a steel shank (1) and a mono block tungsten carbide insert (2) with three radial wings (3) which are joined at the center and define the cutting edges (5). The center where the radial wings (3) join in the insert (2), forms a central point (8).
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申请公布号 |
FR2779366(A1) |
申请公布日期 |
1999.12.10 |
申请号 |
FR19980007261 |
申请日期 |
1998.06.05 |
申请人 |
DIAGER |
发明人 |
DEFOUGERES FRANCOIS;RIGOLET PIERRE |
分类号 |
B23B51/02;(IPC1-7):B23B51/02 |
主分类号 |
B23B51/02 |
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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