发明名称 |
En borkrone, en borstang og en selvborende takbolt. |
摘要 |
<p>A drill bit for attachment to an elongate drill rod, the drill bit including means for attachment to an end of the drill rod, and a leading end which defines a pair of diametrically opposed slots which open axially for receipt of a portion of a drill tip which projects axially from the slots. The drill tip being fixedly secured within each of the slots. Further, a drill rod or a self drilling roof bolt comprising the drill bit.</p> |
申请公布号 |
NO20053427(D0) |
申请公布日期 |
2005.07.14 |
申请号 |
NO20050003427 |
申请日期 |
2005.07.14 |
申请人 |
SANDVIK INTELLECTUAL PROPERTY HB |
发明人 |
WEAVER STEVEN LEE;MCLEAN MICHAEL ANDREW |
分类号 |
E21B10/58;E21D21/00;(IPC1-7):E21D21/00 |
主分类号 |
E21B10/58 |
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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