Patent · US Active

Gliding element

US8986821B2 · kind B2 · utility

1Cited by

6References

9Claims

0Family size

Assignee

Federal-Mogul Burscheid GmbH · DE

Inventors

Steffen Hoppe · Overath, DE
Manfred Fischer · Leichlingen, DE
Marcus Kennedy · Düsseldorf, DE

Key dates

Filing date	May 19, 2010
Grant date	Mar 24, 2015
Priority date	—
Expiry date	Jan 9, 2032

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/30
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

The invention relates to a sliding element for an internal combustion engine, especially a piston ring having a DLC coating of ta-C, which has at least one residual stress gradient, a negative residual stress gradient being present in the center region of the coating, when seen from the outside to the inside, said gradient being preferably smaller that the inner region, and the inner region having smaller thickness that the center region.

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