Invention Grant
- Patent Title: Step drill bit
- Patent Title (中): 步钻钻头
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Application No.: US13372975Application Date: 2012-02-14
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Publication No.: US08764355B2Publication Date: 2014-07-01
- Inventor: Laverne R. Durfee
- Applicant: Laverne R. Durfee
- Applicant Address: US NC Huntersville
- Assignee: Irwin Industrial Tool Company
- Current Assignee: Irwin Industrial Tool Company
- Current Assignee Address: US NC Huntersville
- Agency: Moore and Van Allen PLLC
- Agent Dennis J. Williamson
- Main IPC: B23B51/02
- IPC: B23B51/02
Abstract:
A step drill bit comprises a body. A cutting edge insert is removably attached to the body. The body may be made of a first material and the cutting edge insert may be made of a second material where the second material is different than the first material. The cutting edge insert may define a plurality of progressively larger cutting diameters.
Public/Granted literature
- US20120207557A1 STEP DRILL BIT Public/Granted day:2012-08-16
Information query
