发明授权
US08002054B2 Roof drill bit, roof drill bit body and hard cutting insert for roof drill bit
有权
屋顶钻头，屋顶钻头体和用于屋顶钻头的硬质切削刀片
- 专利标题： Roof drill bit, roof drill bit body and hard cutting insert for roof drill bit
- 专利标题（中）： 屋顶钻头，屋顶钻头体和用于屋顶钻头的硬质切削刀片
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申请号： US12321779申请日： 2009-01-26
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公开(公告)号： US08002054B2公开(公告)日： 2011-08-23
- 发明人: Chad A. Swope , Douglas E. Bise , Kris E. Strothmann , Tod D. Hill
- 申请人： Chad A. Swope , Douglas E. Bise , Kris E. Strothmann , Tod D. Hill
- 申请人地址： US PA Latrobe
- 专利权人： Kennametl Inc.
- 当前专利权人： Kennametl Inc.
- 当前专利权人地址： US PA Latrobe
- 代理商 Matthew W. Smith
- 主分类号： E21B10/62
- IPC分类号： E21B10/62 ; E21B10/60
摘要：
A roof drill bit has an elongate roof drill bit body, which has a forward end and a rearward end. The roof drill bit body contains a slot at the forward end. The roof drill bit body contains a dust port wherein the dust port has a central longitudinal dust axis. The roof drill bit further has a hard insert received within the slot wherein the hard insert has a leading surface. The leading surface of the hard insert is rotationally forward of the central longitudinal dust axis of the dust port.
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