发明名称 |
Drill bit and method of use thereof |
摘要 |
The cutting edge of a bit of a rotary drill comprises an agglomerate of natural or synthetic diamond mounted at the free end of a shank freely rotatable in a socket in the body. Preferably the agglomerate and the free end of the shank are cold swaged together and preferably a resilient spring is interposed about the shank between the body and the free end.
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申请公布号 |
US4511006(A) |
申请公布日期 |
1985.04.16 |
申请号 |
US19830458503 |
申请日期 |
1983.01.17 |
申请人 |
GRAINGER, ALFRED J. |
发明人 |
GRAINGER, ALFRED J. |
分类号 |
B21K25/00;B23P15/28;E21B10/12;E21B10/20;E21B10/50;E21B10/56;E21B10/567;E21B10/62;(IPC1-7):E21B10/50 |
主分类号 |
B21K25/00 |
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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