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:
Mar. 09, 2010
Filed:
Jan. 25, 2005
Jens Schaefer, Herzogenaurach, DE;
Martin Steigerwald, Erlangen, DE;
Jonathan Heywood, Pettstadt, DE;
Jens Schaefer, Herzogenaurach, DE;
Martin Steigerwald, Erlangen, DE;
Jonathan Heywood, Pettstadt, DE;
Schaeffler KG, Herzogenaurach, DE;
Abstract
The invention relates to an electric camshaft adjuster for adjusting and securing the phase angle of a camshaft of an internal combustion engine with respect to its crankshaft, having a three shaft gearing which is embodied as a harmonic drive () of sleeve design, and a drive wheel () which is fixed to the crankshaft and has a first ring gear () as well as an output component () which is fixed to the camshaft and has a second ring gear () arranged next to the first ring gear () and an adjustment shaft ('″) which can be driven by an electric adjustment motor, with a wave generator (″) which has means for elliptically deforming a flexurally elastic, externally toothed sleeve (). A way of improving a harmonic drive of sleeve design is for the expenditure on the construction of the harmonic drive () to be lowered by changes to the wave generator (), and for the axial installation space thereof to be lowered by integrating the ring gears () into the drive wheel () and output component () which are pushed axially one into the other.