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:
Jan. 26, 2016
Filed:
Sep. 14, 2012
Markus Alexander Hirsch, Stuttgart, DE;
Markus Alexander Hirsch, Stuttgart, DE;
MAHLE International GmbH, Stuttgart, DE;
Abstract
A piston for an internal combustion engine has shaft elements which have inner surfaces that correspond to those regions of the shaft elements in which the shaft elements are thinner than 7% of the piston diameter 'D', and have outer surfaces that define in a radially outward direction those regions of the shaft elements which, viewed in the circumferential direction, lie outside angle ranges of more than 40° on both sides of the pin bore axis. The ratio of the content of the inner surface to the ratio of the content of the outer surface is more than 60%. The shaft elements hereby become elastically compliant, which upon a temperature-induced radial expansion of the piston shaft reduces the pressure that the shaft elements exert on the cylindrical inner wall, whereby the friction losses of the piston, and hence the COemission of the engine fitted are reduced.