发明授权
- 专利标题: Countersink roof bit drill and method for using the same
- 专利标题(中): 埋头钻头钻头及其使用方法
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申请号: US11733372申请日: 2007-04-10
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公开(公告)号: US07708087B2公开(公告)日: 2010-05-04
- 发明人: Brandon S. Stables , Douglas E. Bise , John G. Oldsen , Donald E. Keller , David Scott Rife , John C. Stankus , Chad A. Swope
- 申请人: Brandon S. Stables , Douglas E. Bise , John G. Oldsen , Donald E. Keller , David Scott Rife , John C. Stankus , Chad A. Swope
- 申请人地址: US PA Latrobe US PA Pittsburgh
- 专利权人: Kennametal, Inc.,Jennmar Corporation
- 当前专利权人: Kennametal, Inc.,Jennmar Corporation
- 当前专利权人地址: US PA Latrobe US PA Pittsburgh
- 代理机构: The Webb Law Firm
- 主分类号: E21B10/62
- IPC分类号: E21B10/62
摘要:
A roof bit drill has a central shaft with a front end and a back end. The drill also has a base secured about the central shaft proximate to the front end, wherein the base has clearance channels extending axially therethrough. At least one cutting element is arranged on the base in a convex cutting pattern to permit loosened material to be evacuated. The roof bit drill may further include a drill depth locator to identify when the drill has been advanced within a mine roof to a predetermined depth. A method for using the roof drill bit is also disclosed herein.
公开/授权文献
- US20080251296A1 Countersink Roof Bit Drill And Method For Using The Same 公开/授权日:2008-10-16
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