发明名称 |
Drilling tool assembly and its center drill and cup shape drill |
摘要 |
A center drill used for machining a hole in a work piece which is adapted to be partially enclosed in a cup shape drill member in a side view thereof, includes a drill portion provided on a leading end of the center drill, and a dust extractor radially outwardly extending from a portion of the center drill which is enclosed in the cup shape drill member.
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申请公布号 |
US5813802(A) |
申请公布日期 |
1998.09.29 |
申请号 |
US19960757815 |
申请日期 |
1996.11.27 |
申请人 |
HOUSE B.M. CO., LTD. |
发明人 |
AJIMI, KUNIO;AJIMI, TSUNEYOSHI |
分类号 |
B23B51/04;(IPC1-7):B23B47/00 |
主分类号 |
B23B51/04 |
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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