Engine piston with rolling element skirt
US7938058B2 · kind B2 · utility
2Cited by
7References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 16, 2008 |
| Grant date | May 10, 2011 |
| Priority date | — |
| Expiry date | Aug 17, 2029 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02F3/00
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The present invention utilizes rolling elements, such as balls or rollers acting as bearings carried in openings in the skirt or equivalent portion of a piston, to engage the cylinder walls and replace the sliding bearings of the skirt with the roller elements in the skirt. The rolling elements then absorb all or some of the thrust loads conventionally absorbed by the skirt walls sliding along surfaces of an associated cylinder and thereby reduce the friction forces developed by the reciprocating action of the piston skirt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.