Patent · US Active

Multi-piece oil scraper ring with reduced friction

US11713811B2 · kind B2 · utility

0Cited by

16References

6Claims

0Family size

Assignee

Federal-Mogul Burscheid GmbH · DE

Inventors

Stephan Machliner · Leverkusen, DE
Sina Shahverdi · Cologne, DE
Dirk Barenreuter · Odenthal, DE

Key dates

Filing date	May 28, 2019
Grant date	Aug 1, 2023
Priority date	—
Expiry date	May 28, 2039

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16J9/069
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A multi-piece piston ring includes an upper scraper ring 10 comprising two flank surfaces, an outer scraping surface/edge, and an inner spring contact surface. A lower support ring 4 includes two flank surfaces, an outer spring contact surface, and a support ring inner surface. An expander spring/spiral spring 8, which, on an upper and lower side, is operational to abut against a respective lower flank surface of the upper scraper ring 10 and against the upper flank surface of the support ring 4. Scraper ring contact projections protruding upwards on an inner spring side, and support ring contact projections protruding downwards on an outer spring side, wherein the scraper ring contact projections are to each abut against the inner spring contact surface of the scraper ring 10, and support ring contact projections protruding downwards are to abut against the outer spring contact surface.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.