Patent ID: 7066721
Filing Date: 2006-06-27
Classification: F04D,H02K

Abstract:
1. An inside-out ceiling fan motor having a stator mounted to a downrod with an annular array of stator coils positioned about a rotor axis of rotation, and a rotor rotatably mounted about said stator and an axis of rotor rotation, and wherein said rotor has a plurality of vanes spaced along the rotor periphery and canted at an angle of attack to a place of rotor vanes rotation oriented normally to said axis of rotor rotation to scoop ambient air into the rotor during fan operation towards and through the stator coils to cool them, and wherein each of said rotor vanes has an inside surface and an outside surface, extending between leading and trailing vane edges, and where said vane outside surfaces are longer than said vane inside surfaces as measured between said leading and trailing vane edges whereby air is accelerated over the outside vane surfaces during rotor rotation and onto the stator coils for enhanced coils cooling.