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. 24, 2009
Filed:
Jul. 31, 2007
Reiner Keller, Bodmann-Ludwigshafen, DE;
Michael Pantke, Friedrichshafen, DE;
Reiner Keller, Bodmann-Ludwigshafen, DE;
Michael Pantke, Friedrichshafen, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A magnetic actuator for the direct generation of a rotary actuation of a shaft () with currentless stop position fixation is proposed, which comprises at least one permanent magnetic anchor () configured as an annular segment and torque-proof connected to the shaft () and at least two electromagnet systems (), which each have a coil () wound around a ferromagnetic core (), wherein the at least two electromagnet systems () and the at least one permanent magnetic anchor () are arranged in a non-magnetic pole conduit () or on a circular path configured as an annular segment or as a ring co-axially with respect to the rotating shaft (), the at least one permanent magnetic anchor () is arranged between two electromagnet systems (), and the length of the circular segment between the electromagnet systems () is greater than the length of the anchor () arranged between the electromagnet systems () in peripheral direction in order to make possible a motion of the anchor () along a circular path segment between the electromagnet systems () corresponding to their current feed.