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:
Feb. 05, 2013
Filed:
Feb. 28, 2008
Dirk Schoeneberg, Raitenbuch, DE;
Joerg Wutzler, Zwickau, DE;
Holger Voges, Tiefenbach, DE;
Gero Bromme, Altenburg, DE;
Dirk Schoeneberg, Raitenbuch, DE;
Joerg Wutzler, Zwickau, DE;
Holger Voges, Tiefenbach, DE;
Gero Bromme, Altenburg, DE;
Audi AG, Ingolstadt, DE;
Abstract
A valve drive assembly cooperable with gas exchange valves of an internal combustion engine having a cam shaft and at least one came support rotatably fixed and axially displaceable on the cam shaft and having at least two cam profiles selectively engageable with a roller provided on a follower engageable with a valve comprising a cam support having a cylindrical surface disposed coaxially with a cam shaft, provided with a pair of oppositely inclined, spiral grooves; and means selectively insertable into the grooves, coacting with side walls of such grooves as the cam shaft rotates to effect axial displacement of the cam support.