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. 31, 2015
Filed:
Jan. 18, 2013
Schaeffler Technologies Ag & Co. KG, Herzogenaurach, DE;
Jens Schafer, Herzogenaurach, DE;
Martin Steigerwald, Herzogenaurach, DE;
Michael Busse, Herzogenaurach, DE;
Jurgen Plate, Gerhardshofen, DE;
Steffen Racklebe, Obermichelbach, DE;
Andreas Wedel, Emskirchen, DE;
Olaf Boese, Nuremberg, DE;
Robert Heinemann, Furth, DE;
Schaeffler Technologies AG & Co. KG, Herzogenaurach, DE;
Abstract
A directional valve () for controlling a hydraulic oil flow from a pressure port () via working chambers of a camshaft adjuster () to a tank port (). The directional valve () includes an accumulator port () for conducting at least a part of the hydraulic oil flowing out of a working chamber into a volume accumulator () before said hydraulic oil flows out into the tank port (), and the accumulator port () is connected via a passage () to the pressure port ().