Steel tooth bit with scooped teeth profile
US7779937B2 · kind B2 · utility
0Cited by
10References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 21, 2008 |
| Grant date | Aug 24, 2010 |
| Priority date | — |
| Expiry date | Aug 20, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/50
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An earth-boring bit has at least one steel tooth with a scoop-shaped profile. The scoop-shaped profile is formed by milling and hardfacing a tooth to have at least one flank with a concave profile. Additionally, the tooth may contain one flank with a concave profile and another with a convex profile. The centerline axis of the tooth may be moved to alter the angle between the flanks and the centerline to vary the manner in which the tooth engages the formation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.