Patent · US Active

Piston ring

US8979094B2 · kind B2 · utility

3Cited by

5References

7Claims

0Family size

Assignee

Federal-Mogul Burscheid GmbH · DE

Inventor

Peter Esser · Kürten, DE

Key dates

Filing date	Jan 9, 2012
Grant date	Mar 17, 2015
Priority date	—
Expiry date	Jan 9, 2032

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16J9/26
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A piston ring, in particular a compression piston ring, includes a main body, which has a radially outer running surface, a radially inner circumferential surface, an upper and a lower flank surface, and a joint, wherein the running surface is provided with at least one circumferential recess which receives a wear-resistant coating, in particular a PVD coating, and wherein, starting from respective end faces of the joint, as seen in the circumferential direction of the main body, a land shoulder is integrally formed on the main body outside the coating and extends at a predetermined radial height over a predetermined circumferential length on both sides of the joint.

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