Cutting insert for a roof drill bit
US8807248B2 · kind B2 · utility
5Cited by
3References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 23, 2011 |
| Grant date | Aug 19, 2014 |
| Priority date | — |
| Expiry date | Dec 7, 2032 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/38
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A hard cutting insert for use with a roof drill bit includes a first webbed notch and a second webbed notch structured and arranged on the hard insert for removing or evacuating drilling debris from an upper surface of the hard insert during a drilling operation. A roof drill bit including a hard cutting insert having a first webbed notch and a second webbed notch structured and arranged on the hard insert.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.