发明名称 |
Method and apparatus for boring through a solid material |
摘要 |
A rotary drill bit for drilling a hole through a solid body is disclosed. The drill bit includes a collar and a penetrating member. At a proximal end, the collar is attachable to a drill shaft. At a distal end, the collar is attachable to the penetrating member. The penetrating member has a connecting end for attachment to the collar and a cutting end for engaging the solid body. A pilot drill is fixedly attached to the cutting end for initiating contact with the solid body.
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申请公布号 |
US2004163852(A1) |
申请公布日期 |
2004.08.26 |
申请号 |
US20040786499 |
申请日期 |
2004.02.24 |
申请人 |
WOODINGS INDUSTRIAL CORPORATION |
发明人 |
BROOM GILBERT R. |
分类号 |
B23B51/00;E21B10/38;E21B10/40;E21B17/042;E21B17/10;E21B21/16;(IPC1-7):E21B17/00;E21B10/60 |
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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