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:
Sep. 02, 2014
Filed:
Aug. 30, 2011
Timotheus Kaiser, Stuttgart, DE;
Hermann Pfeifer, Essingen, DE;
Wolfgang Rehm, Ulm, DE;
Karl Weisskopf, Rudersburg, DE;
Timotheus Kaiser, Stuttgart, DE;
Hermann Pfeifer, Essingen, DE;
Wolfgang Rehm, Ulm, DE;
Karl Weisskopf, Rudersburg, DE;
Daimler AG, Stuttgart, DE;
Abstract
A semifinished product blank, suitable for the production of a steel piston () for internal combustion engines having cylinder crankcases made of light metal alloys. Such a steel piston () has at least one upper piston part () which has a combustion recess () and an annular wall (), and a lower piston part () which has a piston skirt () and a connecting rod bearing (). The semifinished product blank is made of an austenitic steel, that is stabilized with Ni, Mn and N and that has a thermal expansion coefficient in a range of 16 to 21×10K. Also disclosed is a steel piston, which at least has a piston skirt () made of an austenitic steel that is stabilzed with Ni, Mn, N. The piston skirt () has a thermal expansion coefficient in a range of 16 to 21×10K.