Patent ID: 8029241
Filing Date: 2011-10-04
Classification: F03D,F05B,Y02E

Abstract:
1. A wind turbine, comprising: a plurality of rotor blades, each said rotor blade having a root portion connected to a rotor hub and an airfoil portion extending radially outward from said root portion; said airfoil portion further comprising a main foil section and a winglet pivotally connected to said main foil section so as to pivot from an in-line position wherein said rotor blade has a first sweep length to an articulated position wherein said rotor blade has a second sweep length; and, a deployable sleeve connected to said winglet so as to extend between said winglet and said main foil section in the articulated position of said winglet, said sleeve stowable within said main foil section or said winglet in the in-line position of said winglet.