Stabilized seal for rock bits
US7694754B2 · kind B2 · utility
0Cited by
4References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 14, 2007 |
| Grant date | Apr 13, 2010 |
| Priority date | — |
| Expiry date | Sep 17, 2027 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/25
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An earth boring bit has a bit body having a depending bearing pin. A cone has a cavity rotatably mounted on the bearing pin. A seal groove is formed in the cavity of the cone. An elastomeric seal ring is located within the groove and forms a seal between a base of the groove and the bearing pin. The seal ring has two side surfaces, each spaced from one of the side walls of the groove by a clearance. Elastomeric protuberances protrude from each of the side surfaces of the seal ring for non-sealing contact with one of the side walls of the groove.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.