Thermal barrier valve
US4300492A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 1979 |
| Grant date | Nov 17, 1981 |
| Priority date | — |
| Expiry date | Dec 18, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B3/06
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A thermal barrier for a diesel engine poppet valve is disclosed. The barrier includes a cup-shaped member having a shield portion spaced from the valve face and a cylindrical skirt portion welded to the valve head. The shield, skirt, and valve face define a hermetically sealed chamber which, when evacuated of gases, provides a heat conduction barrier for insulating the valve face from combusting gases. The chamber is preferably filled with a reinforcing to structurally support the shield and further insulate the valve face. The structural support may be in the form of an insulating material and/or a fabricated material having a low contact area with the shield and valve face.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.