Patent ID: 7425775

Claim:
The wind turbine with an active annular plane area control mechanism, comprising a plurality of blades attached to a rotor head for transmitting the wind force acting on the blades to the output shaft of the wind turbine connected to the rotor head, wherein are provided a blade tilting mechanism for tilting the blades in the direction of the axis of rotation of the rotor head to change active annular plane angle, and wherein said blade tilting mechanism comprises a fluid pressure actuators fixed to the rotor head so that the output shaft thereof moves in the direction of the axis of rotation of the rotor head, and a plurality of blade link each of which is supported via the supporting shaft fixed to the rotor head for swinging, an end part of each link being connected to the output shaft of said fluid pressure actuator and the other end being connected to each blade, and the tilt angle of the blades can be changed by swinging said blade link around said supporting shaft through the reciprocation of the output shaft of said fluid pressure actuator.