The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 01, 2023
Filed:
May. 28, 2019
Federal-mogul Burscheid Gmbh, Burscheid, DE;
Federal-Mogul Burscheid GmbH, Burscheid, DE;
Abstract
A multi-piece piston ring includes an upper scraper ringcomprising two flank surfaces, an outer scraping surface/edge, and an inner spring contact surface. A lower support ringincludes two flank surfaces, an outer spring contact surface, and a support ring inner surface. An expander spring/spiral spring, which, on an upper and lower side, is operational to abut against a respective lower flank surface of the upper scraper ringand against the upper flank surface of the support ring. Scraper ring contact projections protruding upwards on an inner spring side, and support ring contact projections protruding downwards on an outer spring side, wherein the scraper ring contact projections are to each abut against the inner spring contact surface of the scraper ring, and support ring contact projections protruding downwards are to abut against the outer spring contact surface.