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:
Nov. 12, 2002
Filed:
Mar. 16, 2001
Applicant:
Inventors:
Martin Basler, Gaildorf, DE;
Ulrich Engelhart, Fellbach, DE;
Peter Grahle, Gerlingen, DE;
Volker Korte, Bissingen, DE;
Jürgen Schmid, Gaildorf-Münster, DE;
Matthias Vogelsang, Stuttgart, DE;
Jens Wiesenmüller, Lienen, DE;
Assignee:
MAHLE Ventiltrieb GmbH, Stuttgart, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B22C 9/02 ; B22C 9/22 ; B22C 7/02 ; B22D 2/709 ;
U.S. Cl.
CPC ...
B22C 9/02 ; B22C 9/22 ; B22C 7/02 ; B22D 2/709 ;
Abstract
The invention relates to a camshaft made of cast steel having an inner cavity with a cylindrical inner shape, especially a profiled cylindrical inner shape produced rationally according to a lost-foam casting method known per se. A steel camshaft thus produced exhibits a long service life and can withstand extremely high hertzian surface pressures on its bearing surfaces without any damages.