Patent ID: 6147423
Filing Date: 2000-11-14
Classification: H02K

Abstract:
An electric motor comprising:a housing structure;a shaft rotatably supported by said housing structure along a predetermined central axis;a stator fixed with respect to said housing structure, said stator having a plurality of conductive windings radially spaced about said central axis;a rotor located radially inward of said stator and fixed with respect to said shaft, said rotor including first and second end ring structures respectively located at each end thereof, both of said end ring structures defining a first surface tapering from a location nearer an outer diameter of said rotor and a second surface tapering from a location nearer an inner diameter of said rotor, said first surface and said second surface converging to define an annular peak;a plurality of spaced apart mounting sprews located on each of said annular peaks; anda plurality of axial fan blades located on each of said end ring structures.