Method of hardening a valve face of a poppet valve
US6295731A · kind A · utility
6Cited by
3References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 20, 2000 |
| Grant date | Oct 2, 2001 |
| Priority date | — |
| Expiry date | Jan 20, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49298
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a valve head of a poppet valve used in an internal combustion engine, a lobe is formed. The lobe has a vertical section of an isosceles triangle which has a vertex in the middle. By pressing the lobe in a bore of a die, the lobe is plastically deformed, so that a valve face is formed at a position which contacts a valve seat. Suitable airtightness is obtained between the valve face and the valve seat.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.