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:
Oct. 14, 2025
Filed:
Jul. 14, 2022
Applicant:
Federal-mogul Nurnberg Gmbh, Nuremberg, DE;
Inventors:
Rainer Weiss, Nuremberg, DE;
Jens Lehmann, Nuremberg, DE;
Michael Grabinger, Nurberg, DE;
Christian Lindner, Bubenreuth, DE;
Michael Scherer, Furth, DE;
Ralf Meske, Schwabach, DE;
Sven Ungermann, Stuttgart, DE;
Assignee:
FEDERAL-MOGUL NURNBERG GMBH, Nuremberg, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02F 3/28 (2006.01); F02F 3/00 (2006.01);
U.S. Cl.
CPC ...
F02F 3/28 (2013.01); F02F 3/0084 (2013.01);
Abstract
A piston for an internal combustion engine includes at least one annular groove in the piston material, preferably the first annular groove closest to the piston crown, which is configured such that, when viewed in cross-section, at least one elliptic curve and/or convex cubic spline is present between a lower flank of the annular groove and an upper flank of the annular groove.