Invention Grant
- Patent Title: Centering adaptor for flat-bladed drill bits
- Patent Title (中): 用于平头钻头的定心适配器
-
Application No.: US12589185Application Date: 2009-10-20
-
Publication No.: US08348559B1Publication Date: 2013-01-08
- Inventor: Richard R. Criswell
- Applicant: Richard R. Criswell
- Agent Allen A. Dicke, Jr.
- Main IPC: B23B49/00
- IPC: B23B49/00
Abstract:
The centering adaptor is configured to receive a spade type drill bit. The body of the adaptor has three centering arms to engage in a previously drilled smaller hole so that the spade type drill bit is guided along the same centerline to re-drill the hole to a larger diameter.
Information query
