Diamond twist drill blank
US4991467A · kind A · utility
35Cited by
6References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 14, 1989 |
| Grant date | Feb 12, 1991 |
| Priority date | — |
| Expiry date | Aug 14, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/89
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A diamond tipped twist drill for drilling holes in a work piece consists of a body forming a pair of flutes, each flute forming a channel that essentially parallels the flutes. Each channel ends at an aperture formed in the body nearest a cutting end of the drill. Diamond material is pressed into the flutes and through the aperture. Subsequent machining at the cutting end of the drill bit body exposes the sintered diamond forming a finished diamond cutting tip for the twist drill.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.