Oil-reserving piston ring
US8827277B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Aug 20, 2010 |
| Grant date | Sep 9, 2014 |
| Priority date | — |
| Expiry date | Aug 20, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J9/20
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An oil-reserving piston ring includes an upper wedge ring (100a,200a) and a lower wedge ring (100b,200b) jointed with each other. The upper wedge ring (100a,200a) and the lower wedge ring (100b,200b) are each arranged with an opening, the upper wedge ring (100a,200a) has a first working surface (101,201) contacting with the wall of a cylinder, the lower wedge ring (100b,200b) has a second working surface (102,202) contacting with the wall of the cylinder, and at least one of the first working surface (101,201) and the second working surface (102,202) is arranged with at least one oil-reserving groove (105,106,205,206). Also provided is a piston (600) with only one piston ring slot which is used for arranging the oil-reserving piston ring. The oil-reserving piston ring has a good lubricating property and seal, and is high in reliability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.