Wind turbine having variable pitch airfoils that close when...

Details Wind turbine having variable pitch airfoils that close when... Wind turbine having variable pitch airfoils that close when...

2007-05-23

2009-06-23

Ponomarenko, Nicholas (Department: 2834)

Prime-mover dynamo plants

Fluid-current motors

Wind

C290S044000, C290S042000, C290S054000

Reexamination Certificate

active

07550865

ABSTRACT:
A wind turbine, having: a rotatable frame; a plurality of airfoils mounted to the rotatable frame, the wherein the airfoils extend parallel to an axis of rotation of the rotatable frame, and wherein the airfoils are individually pivotable with respect to the rotatable frame; and a mechanism that holds each of the airfoils in a high lift/high drag position when the airfoil moves in a direction of air flow. The wind turbine may optionally include a rotational stop to prevent rotation of the air foil from a high drag position to a low drag position when the airfoil is moving in the direction of the wind flow.

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PCT International Search Report, Apr. 16, 2008.

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