Poppet valve made of ceramics
US4881500A · kind A · utility
15Cited by
3References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 22, 1988 |
| Grant date | Nov 21, 1989 |
| Priority date | — |
| Expiry date | Nov 22, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49298
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An inclined surface of a valve head extending between a valve stem and a valve seat contacting portion has an annular portion in the place intermediate between the valve steam and the valve seat contacting portion. The inclined surface is ground at the annular portion only.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.