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. 04, 2017
Filed:
Jul. 18, 2013
Mahle International Gmbh, Stuttgart, DE;
Sascha-Oliver Boczek, Dielheim, DE;
Ulrich Bischofberger, Esslingen, DE;
Rainer Scharp, Vaihingen, DE;
MAHLE International GmbH, Stuttgart, DE;
Abstract
The invention relates to a method for producing a piston () for an internal combustion engine, characterized by the following method steps: producing an upper piston part () and a lower piston part () having one or more recesses (') for forming a closed cavity (); introducing a heat transfer medium (), in particular one or more alkali metals, that is solid or paste-like at ambient temperature and liquid at the intended operating temperature of the piston, into the recesses (′) of the lower piston part () and/or of the upper piston part (), wherein the heat transfer medium () is provided in order, during the operative state of the piston (), to effect heat transport within the piston () by convection; closing the recesses to form the closed cavity () which encloses the heat transfer medium (); and connecting the upper piston part () to the lower piston part (). This enables the piston () to be produced in a simplified manner.