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. 22, 2013
Filed:
Dec. 21, 2010
Gisela Ablas Marques, Jundiaí, BR;
André Ferrarese, São Paulo, BR;
Claudinei José DE Oliveira, Itajubá, BR;
Jan Vatavuk, São Paulo, BR;
Gisela Ablas Marques, Jundiaí, BR;
André Ferrarese, São Paulo, BR;
Claudinei José de Oliveira, Itajubá, BR;
Jan Vatavuk, São Paulo, BR;
MAHLE International GmbH, Stuttgart, DE;
Abstract
This invention refers to the solution of problem of spalling of the nitrided layer in piston rings for Flex-fuel engines, without jeopardizing the wear resistance, suggesting for such purpose a nitrided piston ring () equipped with two nitrided layers (), with metallic base () composed mainly of iron and whose superficial hardness presented is of about 800 Vickers, decreasing in a substantially linear manner up to about 400 Vickers for a distance to the surface of up to 90 microns (μm).