Pistons
US4838149A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 1987 |
| Grant date | Jun 13, 1989 |
| Priority date | — |
| Expiry date | Sep 15, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05C2251/042
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Pistons for internal combusion engines are described. The pistons comprise a crown component and a skirt component wherein the crown component consists of an iron or nickel based alloy annular portion having fitted directly therein a ceramic insert, the crown component being joined to the skirt component by an annular composite laminated member of steel and aluminium alloy the steel of the laminated member being energy beam welded to the annular portion of the crown component and the aluminum alloy of the laminated member being energy beam welded to the skirt component there being after welding a sealed, hollow, annular chamber disposed at the junction between the crown component and the skirt component. Embodiments are described having ceramic inserts of silicon nitride and including combustion bowls.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.