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:
Jun. 14, 2011
Filed:
Sep. 07, 2006
Jens Hoppe, Erlangen, DE;
Andreas Rohr, Heroldsbach, DE;
Jens Hoppe, Erlangen, DE;
Andreas Rohr, Heroldsbach, DE;
Schaeffler Technologies GmbH & Co. KG, Herzogenaurach, DE;
Abstract
An electromagnetic actuating unit () of a hydraulic directional control valve () is provided having an armature () which is arranged such that it can be axially displaced within an armature space (), and includes a pole core () which is arranged in a receptacle () and delimits the armature space () in a movement direction of the armature (). Constructions are provided in order to avoid deposits on a guide surface of the armature (), as a result of which the dynamics and the response behavior of the actuating unit () are increased and hysteresis effects and the risk of a malfunction of the actuating unit are minimized.