Poppet valve shield
US4351292A · kind A · utility
13Cited by
15References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 3, 1980 |
| Grant date | Sep 28, 1982 |
| Priority date | — |
| Expiry date | Oct 3, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B3/06
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A thermal barrier (10) fixed to a valve head (12) of a diesel engine poppet valve (14) is disclosed. The barrier includes a thin sheet metal cap 18 having a concave shield portion 18a, an annular fold or corrugation (18b) circumscribing the shield portion, and a cylindrical skirt portion welded to the valve head. The cap and the face portion (12a) of the valve head define an evacuated chamber (20) which is preferably filled with an insulating material (24) which also provides structural support for the shield portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.