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:
Dec. 20, 2011
Filed:
Mar. 23, 2007
Applicants:
Dieter Messmer, Remseck, DE;
Christof Geissler, Freudenstadt, DE;
Roland Schmidt, Backnang, DE;
Inventors:
Assignee:
MAHLE International GmbH, Stuttgart, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02F 3/00 (2006.01); F16J 1/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An upper part () of an assembled piston is disclosed, comprising a radially directed inner contact surface () arranged on the underside of an annular rib () and a radially directed outer contact surface () arranged on the underside of an annular wall (), the outer () and the inner contact surface () each having a grooved profile in the form of concentric grooves with an average depth between Rand R. The wear on the contacting surfaces of the upper piece and the lower piece of the assembled piston is thus reduced.