Twist drill
US7722299B2 · kind B2 · utility
6Cited by
14References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 26, 2006 |
| Grant date | May 25, 2010 |
| Priority date | — |
| Expiry date | Feb 6, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/9097
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A twist drill for metal cutting, made of cemented carbide, including helical chip flutes extending through an entire body of the twist drill or a part thereof, a shank to be secured to a rotary spindle, two main cutting edges, and two leading edges. The leading edges have a larger edge radius than that of the cutting edges.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.