Invention Grant
- Patent Title: Countersink roof bit drill and method for using the same
- Patent Title (中): 埋头钻头钻头及其使用方法
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Application No.: US11733372Application Date: 2007-04-10
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Publication No.: US07708087B2Publication Date: 2010-05-04
- Inventor: Brandon S. Stables , Douglas E. Bise , John G. Oldsen , Donald E. Keller , David Scott Rife , John C. Stankus , Chad A. Swope
- Applicant: Brandon S. Stables , Douglas E. Bise , John G. Oldsen , Donald E. Keller , David Scott Rife , John C. Stankus , Chad A. Swope
- Applicant Address: US PA Latrobe US PA Pittsburgh
- Assignee: Kennametal, Inc.,Jennmar Corporation
- Current Assignee: Kennametal, Inc.,Jennmar Corporation
- Current Assignee Address: US PA Latrobe US PA Pittsburgh
- Agency: The Webb Law Firm
- Main IPC: E21B10/62
- IPC: E21B10/62

Abstract:
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.
Public/Granted literature
- US20080251296A1 Countersink Roof Bit Drill And Method For Using The Same Public/Granted day:2008-10-16
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