Lubricant system for a rotary cone rock bit
US5188462A · kind A · utility
10Cited by
10References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 2, 1990 |
| Grant date | Feb 23, 1993 |
| Priority date | — |
| Expiry date | Mar 2, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2352/00
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A radially disposed thrust bearing surface formed in a rotary cone is provided with at least a pair of grooves and a ramp surface on the trailing edge of the grooves. The groove provides a lubricant reservoir and the ramp serves to generate hydrodynamic pressures during rotation of the rotary cone on the thrust surface of a journal bearing thereby distributing a film of lubricant on the opposing thrust bearing surfaces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.