Patent ID: 7288865

Claim:
A bicycle generator hub comprising: a hub shaft configured and arranged to be non-rotatably mounted to a bicycle frame; a hub shell rotatably mounted around the hub shaft; first and second bearings disposed between the hub shell and the hub shaft; a generator mechanism having a coil directly mounted to the hub shaft and a plurality of magnets disposed opposite the coil on an inner circumferential surface of the hub shell to generate electric power from rotation of the hub shell relative to the hub shaft, the coil including a plurality of claw-type secured yokes disposed in an alternating fashion, a coil unit disposed between the secured yokes and a core yoke disposed inside the coil unit; and first and second magnetic flux recirculation members disposed on the hub shell to return a leaked magnetic flux to the coil, each of the first and second magnetic flux recirculation members axially extending along the hub shaft and having an inner end adjacent the secured yokes and radially spaced from the hub shaft at least as far as an inner edge of the coil unit.