DLC coating for earth-boring bit seal ring
US7234541B2 · kind B2 · utility
49Cited by
16References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 19, 2002 |
| Grant date | Jun 26, 2007 |
| Priority date | — |
| Expiry date | Dec 10, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49885
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An earth-boring bit has a seal assembly with a seal face having a DLC coating. The seal assembly locates between a bearing pin and a cone of the bit. The seal assembly has at least one rigid ring that rotates against a mating surface. The DLC coating is diamond-like carbon that may be coated by different processes onto either the ring, the mating surface, or both.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.