Patent · US Active

Piston ring for internal combustion engines with increased fatigue strength, and method for producing same

US9719596B2 · kind B2 · utility

0Cited by

6References

11Claims

0Family size

Assignee

Federal-Mogul Burscheid GmbH · DE

Inventors

Nigel Gray · Winchester, GB
Stephan Machliner · Leverkusen, DE

Key dates

Filing date	Oct 29, 2013
Grant date	Aug 1, 2017
Priority date	—
Expiry date	Oct 29, 2033

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49281
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A piston ring (2) having increased fatigue resistance includes a plastically deformable material. The piston ring (2) has a running face (4), which is delimited at the top by an upper running face edge (3) and at the bottom by a lower running face edge (1). Compressive stresses are introduced into the upper running face edge (3) and/or into the lower running face edge (1) along at least one part of the circumference, the compressive stresses having been produced by roller burnishing.

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