Multiple part oil-control ring for piston
US4759266A · kind A · utility
11Cited by
5References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 12, 1987 |
| Grant date | Jul 26, 1988 |
| Priority date | — |
| Expiry date | Jan 12, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J9/066
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An oil control ring for a piston in an i.c. engine comprising an expander ring and two lamellar rails which scrape the oil from the cylinder wall. The expander ring has two series of lugs arranged alternately on each side, which support the rails and two series of dimples arranged alternately on each side which space the rails from the expander ring. The expander ring has notches in its outer and inner circumference and is bent into a circular form. Its free ends form a butt joint.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.