Patent ID: 8334610

Claim:
An apparatus for controlling an orientation of wind turbine blades, comprising: a turbine blade; a turbine blade bearing attached with said turbine blade, said turbine blade bearing being capable of rotating about a longitudinal axis of the turbine blade, thus being capable of changing a pitch angle of said turbine blade; a spider capable of a substantially perpendicular movement with respect to a plane of rotation of the wind turbine blades; moving means for moving the spider in response to first and second control signals; and a linkage arm connecting said spider with said turbine blade bearing, wherein the movement of said spider causes said linkage arm to rotate said turbine blade bearing, thus changing the pitch angle of said turbine blade; and a controller configured to: receive a power output signal from a turbine generator, compare said power output signal to a target power value, generate a first control signal when the power output signal is higher than a target power value, generate a second control signal when the power output signal is lower than the target power value, and direct the first and second control signals to the moving means for controlling movement of the spider in response to the power output signal.