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:
Mar. 31, 2015
Filed:
Jun. 29, 2010
Joachim Schulz, Stuttgart, DE;
Jochen Kortas, Murr, DE;
Joachim Schulz, Stuttgart, DE;
Jochen Kortas, Murr, DE;
MAHLE International GmbH, Stuttgart, DE;
Abstract
The present invention relates to a method for producing a multi-part piston () for an internal combustion engine, comprising the following method steps: producing an upper piston part () and a lower piston part (), each having an inner support element () having joining surfaces () and an outer support element () having joining surfaces (), applying a high-temperature solder material in the area of at least one joining surface (oror), assembling the upper piston part () and the lower piston part () to form a piston body by establishing a contact between the joining surfaces (oror), placing the piston body in a vacuum furnace and evacuating the vacuum furnace; heating the piston body at a pressure of at most 10mbar to a soldering temperature of at most 1300° C.; cooling the soldered piston () at a pressure of at most 10mbar until the high-temperature solder material is completely solidified. The present invention further relates to a piston () that can be produced by means of the method.