Conformal bearing for rock drill bit
US8028770B2 · kind B2 · utility
3Cited by
22References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 17, 2010 |
| Grant date | Oct 4, 2011 |
| Priority date | — |
| Expiry date | Nov 17, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2352/00
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A rock drilling bit having PDC radial bearings has journal and cone bearing surfaces with increased contact area to increase load support. The radius of curvature of the bearing pin journal and cone bearing surfaces are matched or conformed on the bearing pressure side. The conformal journal surfaces may be formed on the main journal bearing, the pilot pin radial bearing, or both surfaces. In addition, diamond inlays may be located on the bearing surfaces of the cone, the bearing pin, or both components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.