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:
Nov. 04, 2014
Filed:
Mar. 25, 2011
Anton Bech, Ringkøbing, DK;
Jesper Lykkegaard Andersen, Hornslet, DK;
Anton Bech, Ringkøbing, DK;
Jesper Lykkegaard Andersen, Hornslet, DK;
Vestas Wind Systems A/S, Aarhus N., DK;
Abstract
A wind turbine includes a rotor having at least one wind turbine blade connected to a rotor hub through at least one blade pitch bearing. The pitch bearing includes at least one outer ring, at least one center ring and at least one inner ring. The pitch bearing has a first rolling element arrangement between the outer ring and the center ring, and a second rolling element arrangement between the center ring and the inner ring, wherein at least one of the first and the second rolling element arrangements includes at least two rows of rolling elements. The at least two rows are at different axial positions in relation to a rotational axis. The play in the first row of roller elements is greater than the play in the second row of roller elements. A pitch bearing for a wind turbine is also disclosed.