Patent ID: 8562299

Claim:
Blade for a device for generating energy from a fluid, comprising a drive surface within which a fluid is intended to flow in order to drive the blade rotationally around an axis of rotation {right arrow over (X)} 0 that defines an orthogonal frame of reference {right arrow over (X)} 0 , {right arrow over (Y)} 0 , {right arrow over (Z)} 0 with axes {right arrow over (Y)} 0 , {right arrow over (Z)} 0 , delimited by a leading edge and a trailing edge, narrowing between the leading edge and the trailing edge, extending along a neutral axis, characterized in that the projection of the neutral axis on the {right arrow over (X)} 0 , {right arrow over (Y)} 0 plane has a first curvature arranged so that, in the {right arrow over (X)} 0 , {right arrow over (Y)} 0 plane, the neutral axis moves away from or toward axis of rotation {right arrow over (X)} 0 from the leading edge to the trailing edge, the {right arrow over (X)} 0 , {right arrow over (Y)} 0 plane being defined so as to contain the neutral axis along the leading edge.