Method of making a valve seat
US6173494A · kind A · utility
4Cited by
4References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 24, 2000 |
| Grant date | Jan 16, 2001 |
| Priority date | — |
| Expiry date | Jan 24, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/791
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A valve seat for a ball valve, especially a fuel-injection valve for an internal-combustion engine is finely ground to form a trough in the conically-ground seat with a circular arc cross section in planes of the axis and of a depth to eliminate shape variations in the conically-ground valve seat. The circular arc radius of the trough is greater than the radius of the ball.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.