Patent ID: 7791233

Claim:
A high-torque electric motor comprising: a) a rotor assembly mounted to a central output shaft, comprising: a first cone-shaped support member having a first hub fixedly mounted to said output shaft, an elongated annular first wall tapers away from said first hub at an angle and terminates at a first outer end; a second cone-shaped support member having a second hub fixedly mounted to said output shaft, an elongated annular second wall tapers away from said second hub at an angle and terminates at a second outer end, wherein said annular walls taper toward each other; a plurality of electromagnets mounted to said support members at said first and second ends, said electromagnets are spaced evenly around said output shaft, wherein portions of said electromagnets extend axially beyond said outer ends; and a plurality of arms mounted to said first and second ends, wherein said arms support said extended electromagnet portions; and b) a stator having a housing which defines an internal rotor-receiving cavity, said stator including a plurality of permanent magnets that are axially spaced evenly about said cavity.