Resilient plastic piston ring
USRE31005E · kind E · reissue
6Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 30, 1979 |
| Grant date | Aug 3, 1982 |
| Priority date | — |
| Expiry date | Nov 30, 1999 |
Classification
- Technology area (CPC —)General
Abstract
A plastic ring for internal combustion engine pistons. In a preferred embodiment, the ring has a flat outer diameter adapted to engage the inner diameter of a compression piston ring and an inner diameter adapted to engage the backwall of the ring groove. An axial groove slightly spaced from the outer diameter extends into the ring from the top thereof, whereby combustion gases will expand the ring so that it acts as a circumferential expander for the compression ring while preventing blowby of gases through the ring groove. In another modification, the ring is used with its outer diameter acting against the cylinder wall.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.