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:
Apr. 17, 2012
Filed:
Nov. 29, 2007
Antonio Eduardo Meirelles Tomanik, Sao Paulo SP, BR;
Mauricio Ciminelli Duarte DE Souza, Itajuba MG, BR;
Antonio Eduardo Meirelles Tomanik, Sao Paulo SP, BR;
Mauricio Ciminelli Duarte de Souza, Itajuba MG, BR;
MAHLE International GmbH, Stuttgart, DE;
MAHLE Metal Leve S/A, Sao Paulo SP, BR;
Abstract
The present invention relates to a piston ring (), particularly a compression ring, for an internal combustion engine, comprising a ring-shaped body () having a ring joint () formed by butt ends (), the ring-shaped body () further having a ring contact face () along its perimeter, for contacting a cylinder wall in operation. According to the invention, the ring contact face () has a barrel-shaped profile, the barrel-shaped profile having in any of its cross-sections an area of maximum curvature, whose radius of curvature increases in the direction of the butt ends ().