Patent ID: 7411322

Claim:
An electric motor, comprising: a stationary part that comprises a lining and a plurality of poles; and a movable part that comprises a spacer and a plurality of bearings, wherein: the stationary part defines a cavity, wherein the lining covers an interior wall of the cavity; the lining is located between the poles and the movable part; the spacer comprises a notched disk; each bearing is located in a respective notch of said disk and at least partially confined between the spacer and the lining; the spacer further comprises one or more springs, each adapted to push a respective bearing toward the lining; the movable part is adapted to rotate with respect to the stationary part within the cavity in response to excitation of one or more of the poles; and the bearings are adapted to roll between the lining and the spacer when the movable part moves with respect to the stationary part.