Engine piston having an insulating air gap
US7654240B2 · kind B2 · utility
16Cited by
24References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 18, 2006 |
| Grant date | Feb 2, 2010 |
| Priority date | — |
| Expiry date | Sep 13, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02F2003/0061
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A piston for an internal combustion engine has an upper crown with a top and a bottom surface, and a lower crown with a top and a bottom surface. The upper crown and the lower crown are fixedly attached to each other using welds, with the bottom surface of the upper crown and the top surface of the lower crown forming a mating surface. The piston also has at least one centrally located air gap formed on the mating surface. The air gap is sealed to prevent substantial airflow into or out of the air gap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.