Patent ID: 6428275
Filing Date: 2002-08-06
Classification: F03D,F05B,Y02E,Y02P,Y10S

Abstract:
A helical wind rotor, comprising:at least two blades, each of said at least two blades being curved in a substantially equivalent shape in a cross-section in a plane perpendicular to a rotational axis of the wind rotor, and being arranged parallel with the rotational axis, wherein the at least two blades am arranged at equal angular intervals around the rotational axis, wherein a blade cross section of each of said at least two blades is arranged to revolve about the rotational axis, wherein the blade cross section of said each of said at least two blades is shaped so that corresponding points in each of a plurality of sequential blade cross-sections of each of said at least two blades traces a shape of a helical screw-line on a respective blade surface, wherein each of said at least two blades corresponds to a planar unfolded blade defined by a portion of a circular annulus.