Excluder ring for earth-boring bit
US7708090B2 · kind B2 · utility
5Cited by
15References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 12, 2006 |
| Grant date | May 4, 2010 |
| Priority date | — |
| Expiry date | Mar 10, 2027 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/25
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An elastomeric seal ring is located between each bearing pin and each cone of an earth-boring bit. An excluder ring or band is imbedded within the inner diameter of the seal ring. A portion of the inner diameter of the seal ring as well as the excluder ring are in dynamic sealing contact with the bearing pin. The excluder ring may be harder and more wear resistant than the seal ring. The excluder ring may have lubricating properties. An outer excluder ring may be located on the outer diameter of the seal ring for engaging the cone to resist rotation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.