Patent ID: 8148841

Claim:
A windmill comprising: An outer casing having a bore defined therein, the outer casing having an inner surface located adjacent to the bore; a coil assembly mounted on the outer casing adjacent to the bore to extend into the bore˜ the coil assembly including two inductor coils mounted on the inner surface of the outer casing and extending radially inwardly into the bore, the two inductor coils being spaced apart from each other; and a rotor system located inside the bore, said rotor system comprising a rotor including a plurality of blades which are rotatably mounted in said rotor system to rotate with respect to the inner surface of the outer casing, each blade having an outer edge which is located adjacent to the inner surface of the outer casing, and each blade further including two spaced apart C-shaped cutout areas defined therein to be located adjacent to the outer edge and adjacent to the inner surface of the outer casing, each cutout area in each blade being located and sized to surround at least ¾ of an associated coil of the coil assembly and at least partially enclose the associated coil of the coil assembly within the cutout area defined in the blade, the cutout area being sized to permit the blade of the rotor to move with respect to the associated coil of the coil assembly without interference so that the blade of the rotor can rotate with respect to the coil assembly while the outer edge of the rotor passes by the coil assembly.