Thrust bearing for rock bits
US4413918A · kind A · utility
10Cited by
7References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 19, 1982 |
| Grant date | Nov 8, 1983 |
| Priority date | — |
| Expiry date | May 19, 2002 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2352/00
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An intermediate thrust bearing is positioned between the rotating cutters and its bearing pin of an earth-boring bit. The intermediate bearing is so configured to take outthrust loads, without rotation, that are directed axially against a radially disposed surface of the roller cone journal as the rock bit works in a borehole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.