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:
Jan. 03, 2017
Filed:
Feb. 11, 2014
Schaeffler Technologies Gmbh & Co. KG, Herzogenaurach, DE;
Steffen Raecklebe, Obermichelbach, DE;
Schaeffler Technologies AG & Co. KG, Herzogenaurach, DE;
Abstract
A camshaft phaser having a vane-type phaser having a central-position locking device having locking pins lockable in a locking slot stationary with respect to the stator and locking in the locking slot from different directions. A locking pin has a blocking portion and a flow-through pressure medium conduit, by which a fluid connection between two working chambers of different directions of action can be established or blocked in the different positions of the first locking pin. The working chambers-of the different directions of actions are capable of being short-circuited by a switching device. At least one pressure medium conduit fluidically connectable to the pressure medium circuit by the flow-through pressure medium conduit of the locking pin has a check valve therein which allows the pressure medium to flow into one of the working chambers whose volume is increased during a rotation of the rotor from either of the advance or retard stop positions toward the central locking position, while at the same time preventing backflow from the same working chamber.