Gas exchange valve for an internal combustion engine
US7240895B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 2005 |
| Grant date | Jul 10, 2007 |
| Priority date | — |
| Expiry date | Apr 9, 2025 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L2820/01
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a gas exchange valve for an internal combustion engine, in each case comprising in particular a hollow valve stem (3) and valve head, in which the valve head comprises a valve bottom and a hollow valve keeper, connected to the external margin of the valve bottom, wherein the valve keeper tapers off as the distance from the bottom increases; the valve stem passes through the hollow valve keeper and is firmly connected to the valve bottom on the one hand, and to the tapering-off end of the valve keeper on the other hand; and the end of the valve stem which is connected to the valve bottom protrudes beyond the connection plane between the valve keeper and the valve bottom, is to be improved in relation to its stability and fatigue strength. For this purpose, the valve bottom of such a gas exchange valve comprises, in the annular region, which is situated between its connection to the valve stem on the one hand and to the valve keeper on the other hand, radially adjacent thereto at least one annular rib with an outwardly convex cross-sectional area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.