Patent · US Active

Piston ring

US9447490B2 · kind B2 · utility

1Cited by

16References

23Claims

0Family size

Assignee

Federal-Mogul Burscheid GmbH · DE

Inventors

Steffen Hoppe · Overath, DE
Manfred Fischer · Leichlingen, DE
Christiane Bauer · Burscheid, DE
Ralf Lammers · Wermelskirchen, DE

Key dates

Filing date	Jul 18, 2008
Grant date	Sep 20, 2016
Priority date	—
Expiry date	Jun 16, 2031

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC23C30/00
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

In order to avoid burn traces on piston rings, it is proposed to provide the piston ring with a wear-protection coating which consists of a material with a thermal conductivity of at least 180 W/(m·K). At least 5% vol. of the wear-protection coating consists of aluminum nitride.

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