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. 09, 2014
Filed:
Jul. 25, 2012
Andreas Werler, Zwickau, DE;
Joerg Wutzler, Zwickau, DE;
Uwe Parsche, Chemnitz, DE;
Thomas Arnold, Mitteldorf, DE;
Jochen Luedemann, Chemnitz, DE;
Andreas Werler, Zwickau, DE;
Joerg Wutzler, Zwickau, DE;
Uwe Parsche, Chemnitz, DE;
Thomas Arnold, Mitteldorf, DE;
Jochen Luedemann, Chemnitz, DE;
IAV GmbH Ingenieurgesellschaft Auto und Verkehr, Berlin, DE;
Abstract
A valve drive device for switching the stroke of gas exchange valves of an internal combustion engine includes a camshaft configured, at least in part, as a hollow shaft. A cam unit includes at least two different cams disposed on the camshaft so as to be rotationally engaged and axially displaceable with respect thereto. An adjustment sleeve is disposed so as to be rotationally engaged on an adjustment shaft and rotatable and axially displaceable inside the camshaft. The adjustment sleeve includes thereon a closed adjustment contour extending about a circumference of the adjustment sleeve and is operatively connected to the cam unit through an adjustment clearance in the camshaft via a first coupling element configured to permanently engage in the adjustment contour. A further coupling element is configured to permanently engage in the adjustment contour and connect to the camshaft so as to be fixed in position.