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. 07, 2012
Filed:
Mar. 24, 2011
Jesper Lykkegaard Andersen, Hornslet, DK;
Jesper Lykkegaard Andersen, Hornslet, DK;
Vestas Wind Systems A/S, Aarhus N, DK;
Abstract
A wind turbine includes a rotor having a rotational axis and a wind turbine blade connected to a hub through a pitch bearing. The pitch bearing includes an outer ring, a center ring and an inner ring. The pitch bearing further includes a first rolling element arrangement having at least two rows of rolling elements between the center ring and one of the inner and outer rings, and a second rolling element arrangement having at least one row of rolling elements between the center ring and the other of the inner and outer rings. A first row of the at least two rows is arranged at a first distance from the rotational axis, and a second row of the at least two rows is arranged at a second distance from the rotational axis greater than the first distance. A pitch bearing for a wind turbine is also disclosed.