Piston with separate head and skirt
US5261363A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 9, 1993 |
| Grant date | Nov 16, 1993 |
| Priority date | — |
| Expiry date | Mar 9, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49256
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a piston for an internal combustion engine. The piston has a longitudinally extending axis and ring grooves for receiving piston rings, and a separate piston head having a top and an annular cooling oil duct. A ring belt extends downwardly from the top of the piston head to define an outer border of the annular cooling oil duct and forms a first support facing in an axial direction. Bosses define an inner border of the annular cooling oil duct and form a second support facing in an opposite axial direction. The cooling oil duct has an opening and an annular plate supported on the first and second supports by spring tension. The annular plate closes the opening of the annular cooling oil duct to retain oil therein to cool the piston.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.