Rock drill bit assembly
US7445063B2 · kind B2 · utility
0Cited by
2References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 7, 2004 |
| Grant date | Nov 4, 2008 |
| Priority date | — |
| Expiry date | Apr 7, 2024 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/28
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drill bit assembly for direct removal of rock with a rotatable bit assembly (5) that includes a plurality of cutters or choppers (7). According to the invention, an number of cutters (7) are so disposed in relation to each other or the bit assembly (5) that a subsequent cutter (7b), seen in the direction of rotation, will engage an edge created by the action of preceding cutter (7a).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.