Non-metallic body cutting tools
US5865571A · kind A · utility
111Cited by
11References
44Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 17, 1997 |
| Grant date | Feb 2, 1999 |
| Priority date | — |
| Expiry date | Jun 17, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/9097
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A drill bit is provided with a cylindrical body portion fabricated from a plastic material. The body portion is fastened in concentric, end to end relation to a cylindrical cutter fabricated from a metallic material and having an array of cutting elements disposed thereon. The body portion and cutter are preferably tubular, wherein the cutting elements are disposed in an annular array, to facilitate core or crown drilling operations. The wall thickness of the tubular body portion may be increased relative that of the cutter to compensate for wear during drilling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.