Patent · US Active

Coated steel piston ring

US10563764B2 · kind B2 · utility

0Cited by

7References

8Claims

0Family size

Assignee

Mahle International GmbH · DE

Inventors

Alexander S. Cooper · Maple Rapids, US
Robert J. Piccard · St. Johns, US
Thomas J. Smith · Bay Shore, US
Thomas Stong · Kent City, US

Key dates

Filing date	May 26, 2017
Grant date	Feb 18, 2020
Priority date	—
Expiry date	Dec 1, 2037

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16J9/00
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A piston ring is formed from a steel substrate consisting of the carbon in a range of 0.80-0.95 wt. %, silicon in a range of 0.30-0.55 wt. %, manganese in a range of 0.25-0.5 wt. %, phosphorus in a range of up to 0.04 wt. %, sulfur in a range of up to 0.04 wt. %, chromium in a range of 17-18 wt. %, molybdenum in a range of 0.70-1.25 wt. %, vanadium in a range of 0.05-0.15%, the remainder iron. The ring has been through hardened and tempered so that it has a hardness of 46-54 HRC. A coating is then applied via PVD or other suitable methods onto the ring surface to create the finished piston ring.

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