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:
Mar. 15, 2011
Filed:
Apr. 24, 2008
Tomohiro Numajiri, Nagasaki, JP;
Masahiro Kawai, Nagasaki, JP;
Seita Seki, Nagasaki, JP;
Abstract
Provided are a pitch actuator for a wind turbine generator and a wind turbine generator that can be prevented from losing their reliability. Provided are a cylinder () and a rod () that rotate a wind turbine rotor blade about an axis thereof relative to a rotor head to change a pitch angle; a cylinder bearing () supporting the cylinder () so as to be rotatable relative to the rotor head about a first rotation axis (L) extending substantially parallel to the axis of the wind turbine rotor blade and about a second rotation axis (L) extending in a direction crossing both the first rotation axis (L) and the axis of the cylinder () and the rod (); and a rod bearing () rotatably supporting an end of the rod () on an end surface of the wind turbine rotor blade.