Invention Grant
- Patent Title: Short-hole drill bit
- Patent Title (中): 短孔钻头
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Application No.: US124482Application Date: 1998-07-29
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Publication No.: US5967707APublication Date: 1999-10-19
- Inventor: Fred R. Larson
- Applicant: Fred R. Larson
- Applicant Address: MI Kentwood
- Assignee: Diesel Technology Company
- Current Assignee: Diesel Technology Company
- Current Assignee Address: MI Kentwood
- Main IPC: B23B51/06
- IPC: B23B51/06 ; B23B51/00 ; B23B51/02 ; B23B51/04 ; B23B35/00
Abstract:
A short-hole drill bit and short-hole drilling method in which a drill bit has a unitary body with a substantially V-shaped flute and a support pad are provided. The unitary body has a shank portion and a working portion. The flute extends axially along the working portion, and defines a cutting edge and a passive edge at the body periphery. The support pad is located along a portion of the body periphery. The support pad is located with respect to the cutting edge based on a normal cutting force and a tangential cutting force at the cutting edge. The resultant cutting force is directed at the support pad to cause the support pad to center the short-hole drill bit during operation.
Public/Granted literature
- US5413336A Iron (club) set Public/Granted day:1995-05-09
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