发明名称 |
Mining drill |
摘要 |
In a mine tool of the type having a drive body holding a bit, the bit and drive body include complimentary and mating surfaces wherein one pair of surfaces are adapted to be in overlapping relationship when the bit is twisted in a direction opposite the rotational direction for detachably mounting the bit to the drive body.
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申请公布号 |
US4427082(A) |
申请公布日期 |
1984.01.24 |
申请号 |
US19820346970 |
申请日期 |
1982.02.08 |
申请人 |
GTE LABORATORIES, INC. |
发明人 |
SARIN, VINOD K.;OBERHAUSER, PETER |
分类号 |
E21B10/38;E21B10/58;E21B10/62;(IPC1-7):E21B10/62 |
主分类号 |
E21B10/38 |
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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