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. 03, 2012
Filed:
Mar. 17, 2009
Rainer Scharp, Vaihingen, DE;
Klaus Keller, Lorch, DE;
Volker Weisse, Stuttgart, DE;
MAHLE International GmbH, Stuttgart, DE;
Abstract
The present invention relates to a multi-part piston () for an internal combustion engine, having an upper piston part () having a piston crown (), and a lower piston part (), whereby the lower piston part () has pin boss supports () and pin bosses () connected with them, whereby the upper piston part () and the lower piston part () each have an inner () and an outer () support element, which elements delimit an outer circumferential cooling channel (). According to the invention, it is provided that the inner support elements () delimit a cavity () that is open toward the pin bosses (), and that the cavity () is provided with a separate cooling oil collector () that has at least one cooling oil opening (). The present invention furthermore relates to a method for the production of such a piston.