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. 20, 2015
Filed:
Sep. 24, 2010
Rodrigo Favaron, São Paulo, BR;
Robert Richard Banfield, São Paulo, BR;
Rodrigo Favaron, São Paulo, BR;
Robert Richard Banfield, São Paulo, BR;
MAHLE International GmbH, Stuttgart, DE;
MAHLE Metal Leve S/A, Jundiai, Sao Paulo, BR;
Abstract
The present invention refers to a piston ring, particularly for use in the piston channel of an internal combustion engine or a compressor, comprising at least a substantially ring-shaped metallic base () having at least a first region (), at least a second region () and at least a gap (), the first region () being positioned in a way substantially opposite to the gap (), the ring comprising at least a nitrided layer () in the second region () and comprising at least reduction of the nitrided layer () in the first region (), whereas the reduced nitrided layer () is at least partially blocked in the first region () due to the previous application of an intermediate layer ().