Valve stem seal
US5062397A · kind A · utility
12Cited by
19References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 7, 1990 |
| Grant date | Nov 5, 1991 |
| Priority date | — |
| Expiry date | Sep 7, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/32
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A stem seal for a poppet valve in an internal combustion engine. The seal is a ring type seal received in a groove formed in the valve stem and in sealing engagement with the inside diameter of a tubular valve guide. In accordance with one aspect of the invention the seal element has a plurality of circumferetial ribs formed on its outer diameter, and in accordance with another aspect a helical rib is formed on the outer diameter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.