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:
Oct. 23, 2007
Filed:
Dec. 15, 2004
Ulrich Wierl, Mendorf, DE;
Mike Kohrs, Wilthen, DE;
Rainer Ottersbach, Aurachtal, DE;
Jochen Auchter, Weisendorf, DE;
Hermann Wiehl, Herzogenaurach, DE;
Ulrich Wierl, Mendorf, DE;
Mike Kohrs, Wilthen, DE;
Rainer Ottersbach, Aurachtal, DE;
Jochen Auchter, Weisendorf, DE;
Hermann Wiehl, Herzogenaurach, DE;
INA-Schaeffler KG, Herzogenaurach, DE;
Abstract
A hydraulic device in an internal combustion engine for adjusting a rotation angle of a camshaft in relation to a crankshaft includes a tubular stator and a rotor connected in fixed rotative engagement with the camshaft and having plural vanes in spaced apart relationship to define pressure chambers on both sides of the vanes. The stator is connected in fixed rotative engagement with a crankshaft-drive timing pulley and constructed to define with the rotor vanes the pressure chambers. The stator is made by a shaping process without material to effect a mass reduction. Pressure medium is supplied to or purged from the pressure chambers to selectively adjust the position of the rotor in relation to the stator and thereby the position of the camshaft in relation to the crankshaft.