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:
Oct. 18, 2022
Filed:
Sep. 25, 2020
Liebherr-components Biberach Gmbh, Biberach an der Riss, DE;
Martin Dahl, Wettingen, CH;
Stephan Kreiner, Ulm, DE;
Marcel Winkler, Mindelheim, DE;
Markus Schuster, Ottobeuren, DE;
Christopher Fingerhut, Biberach an der Riss, DE;
Thomas Schulze, Schemmerhofen, DE;
Liebherr-Components Biberach GmbH, Biberach an der Riss, DE;
Abstract
In general, the invention relates to wind turbines, the rotor blades of which can be adjusted in terms of their pitch angle. The invention relates in particular to an actuating drive for adjusting the pitch angle of a rotor blade of a wind turbine, comprising a large rolling bearing which comprises two bearing rings that can be rotated relative to each other, and an actuator for rotating the two bearing rings relative to each other. According to the invention, the actuating drive comprises a ring channel cylinder, which is formed in one of the bearing rings, and at least one piston, which is received in the ring channel cylinder in a movable manner and is drivingly connected to the other bearing ring of the two bearing rings.