Piston ring and piston ring/piston combination with improved wear properties

US11578799B2 · kind B2 · utility

Assignee

• Federal-Mogul Burscheid GmbH · DE

Inventors

• FABIAN RUCH · Leverkusen, DE
• Nigel Gray · Winchester, GB
• Oliver Nickisch · Burscheid, DE

Key dates

• Filing date: Mar 18, 2019
• Grant date: Feb 14, 2023
• Expiry date: Jul 12, 2039

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16J9/20
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A piston ring with improved wear properties has a running surface, an upper ring flank, a lower ring flank, and an inner surface. The piston ring has a radius R, and wherein in a radial section, a running surface contour includes an upper region, a central region, and a lower region. The upper region of the running surface contour has a curvature radius Ro, which lies between the ring radius R and infinity. The central region of the running surface contour has a curvature radius Rm, which lies between the ring radius R and infinity. The lower region has a curvature radius Ru, which is smaller than the ring radius R.