Axial bearing for a roller drill bit
US4190301A · kind A · utility
67Cited by
4References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 2, 1978 |
| Grant date | Feb 26, 1980 |
| Priority date | — |
| Expiry date | Feb 2, 1998 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2352/00
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An axial thrust bearing for a roller drill bit comprising a pair of one piece diamonds mounted in the axial end face of the journal and the interior of the cutting roller supported for rotation on the journal. Each diamond is mounted on a cup-shaped casing made of a softer metal than the journal and cutting roller. Preferably the confronting engaging bearing surfaces of the diamonds are spherical.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.