Composite seal for rotary cone rock bits
USRE36452E · kind E · reissue
17Cited by
29References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 8, 1996 |
| Grant date | Dec 21, 1999 |
| Priority date | — |
| Expiry date | Jul 8, 2016 |
Classification
- Technology area (CPC —)General
Abstract
An elastomeric o-ring rock bit seal is disclosed with two or more integrally bonded elastomers or phenolic type materials joined together to form the seal. The dynamic sealing face adjacent the journal bearing is fabricated from an elastomer/phenolic engineered specifically for wear resistance The bulk of the seal adjacent the static seal retention cavity typically formed in the rotary cone is molded from an elastomer engineered specifically for precise control of the seal contact force adjacent the dynamic seal face when the seal is compressed against the dynamic face by the seal retention cavity in the cone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.