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:
Oct. 15, 2024
Filed:
Jul. 19, 2022
Mahle International Gmbh, Stuttgart, DE;
Mahle Metal Leve S/a, Jundiai, BR;
Bruno Fineto, Barra Funda, BR;
Rafael Antonio Bruno, Sao Paulo, BR;
Rafael Bettini Rabello, Jundiai, BR;
Marcelo Moura De Oliveira, Minas Gerais, BR;
Mahle International GmbH, , DE;
Mahle Metal Leve S/A, , BR;
Abstract
A piston ring may include a spacer or expansion element and/or two segments. The segments may have a radial dimension between approximately 1.50 mm and approximately 1.90 mm and a height between approximately 0.30 mm and approximately 0.40 mm. The segments may have a concave profile with recesses between approximately 0.015 mm and approximately 0.030 mm and a clearance of approximately 0.150 mm. The segments may be wound via a matrix box device and a roller. The piston ring may have a circularity, expressed in the form of a decomposition as a Fourier series, with an amplitude for orders higher than 10 which is not greater than 0.10 μm.