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. 04, 2003
Filed:
Jul. 30, 2001
Klaus Daut, Herzogenaurach, DE;
Ina Walzlager Schaeffler oHG, , DE;
Abstract
A device ( ) for varying the valve timing of gas exchange valves of an internal combustion engines, and the invention more particularly concerns a hydraulic camshaft adjusting device of a rotary piston type comprising a drive pinion ( ) connected in driving relationship to a crankshaft, and a winged wheel ( ) connected rotationally fast to a camshaft ( ), the drive pinion ( ) comprises a hollow space ( ) defined by a circumferential wall ( ) and two side walls ( ), a plurality of hydraulic working chambers being formed in the hollow space ( ) by a plurality of limiting walls and the winged wheel ( ) comprises a plurality of radial wings ( ) that extend individually into the hydraulic working chambers ( ) and divide these into first and second hydraulic pressure chambers ( ) which, when pressurized by a hydraulic pressure medium, effect a pivoting or a fixing of the winged wheel ( ) relative to the drive pinion ( ).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile