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:
Jun. 08, 2010
Filed:
Nov. 29, 2005
Applicants:
Emmerich Ottliczky, Forchtenberg, DE;
Franz Ratzky, Elztal, DE;
Norbert Ries, Külsheim, DE;
Inventors:
Assignee:
KS Kolbenschmidt GmbH, Neckarsulm, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01B 31/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
A piston for an internal combustion engine includes a piston head provided with an annular field, and a piston shaft arranged beneath the annular field. The piston shaft has shaft surfaces and a recess surface which is arranged around a bolt borehole and set back in relation to an outer diameter of the piston. At least one cavity is provided in the region of the lowest annular groove for oil flow in the direction of the recess surface during the movement of the piston and the at least one cavity is arranged outside an especially stressed region above the bolt borehole.