Piston with oil trap
US6668703B2 · kind B2 · utility
20Cited by
3References
9Claims
0Family size
Inventor
Key dates
| Filing date | Oct 2, 2001 |
| Grant date | Dec 30, 2003 |
| Priority date | — |
| Expiry date | Nov 26, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02F2200/06
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A piston for a combustion engine having an oil ring groove on the exterior of the piston which communicates via oil holes with an oil trap extending around the interior of the piston. The oil trap captures lubricant on the downward stroke and pumps lubricant to the piston and cylinder walls on the upward stroke. An oil ring assembly having a wiper, expander and oil ring sections may be provided in the oil ring groove. A bridge may also be provided to support the cylinder head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.