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:
May. 27, 2014
Filed:
May. 19, 2011
Steffen Racklebe, Obermichelbach, DE;
Jochen Auchter, Gerhardshofen, DE;
Jochen Broz, Weisendorf, DE;
Steffen Racklebe, Obermichelbach, DE;
Jochen Auchter, Gerhardshofen, DE;
Jochen Broz, Weisendorf, DE;
Schaeffler Technologies GmbH & Co. KG, Herzogenaurach, DE;
Abstract
A camshaft adjusting device () including at least two hydraulic chamber (A, B) disposed between a stator () and a rotor () and separated by a vane () and supplied with pressure oil from a pressure oil source (P) by a hydraulic oil controller (). In order to achieve improved filling and emptying of the hydraulic chambers, the hydraulic oil controller according to the invention provides: first and second supply lines () disposed between the pressure oil source (P) and one of the hydraulic chambers (A), wherein check valves () are disposed in the supply lines (), wherein the supply lines () are free of further switchable valve elements, and wherein the supply lines () are the sole inlet line for hydraulic oil from the pressurized oil source (P) into the hydraulic chambers (A, B), and a 4/3-way valve element () that is effectively disposed between the hydraulic chambers (A, B) and a tank (T) has three valve positions (I, II, III).