Oil ring
US7354045B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 28, 2003 |
| Grant date | Apr 8, 2008 |
| Priority date | — |
| Expiry date | Nov 27, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J9/206
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
It is a main object of the present invention to provide an oil ring which is capable of reducing sliding friction even in a high speed revolution region of a piston, and capable of reducing the consumption of oil. To achieve the object, the present invention provides an oil ring which is formed into cross-section substantially of an I-shape that two rails are connected at a columnar portion thereof, wherein a sliding projection formed in each of the two rails comprises an outer side surface of sliding projection which forms an outer portion of the sliding projection, a inner side surface of sliding projection which forms an inner portion of the sliding projection, and a sliding surface which slides on a cylinder inner wall and forms a tip end of the sliding projection;
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.