Play-free oil scraper ring
US11199261B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 9, 2017 |
| Grant date | Dec 14, 2021 |
| Priority date | — |
| Expiry date | Apr 5, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J9/206
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A play-free oil scraper ring has a cross section with a running surface leg having at least one scraper web that is situated on a running surface, an upper piston ring flank leg that is connected to the running surface leg, and the upper surface of which forms an upper piston ring flank. A lower piston ring flank leg is likewise connected to the running surface leg, the lower surface of which forms a lower piston ring flank. The upper and/or the lower piston ring flank leg are/is elastic, taper(s) inwardly in the radial direction, and their/its piston ring flank(s) essentially form(s) a conical surface in an uninstalled state. The uninstalled piston ring has an axial height that exceeds a width of a piston ring groove for which the piston ring is intended.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.