Patent ID: 6566777
Filing Date: 2003-05-20
Classification: H02K

Abstract:
An elastic wave actuator comprising:a stator, and rotor sharing a common central axis; the stator having a plurality of electromagnets with pole laminations positioned around a stator frictional surface and the central axis; the rotor comprising an output flange outwardly extended in a radial direction with respect to the central axis, and coupled to a cylindrical magnetically permeable flexible shell, wherein the flexible shell is coaxially positioned with respect to the stator and coupled to the rotor output flange, wherein the flexible shell is magnetically deformed into an elliptical shape by the plurality of electromagnets to frictionally engage the stator frictional surface at points of contact; a means for maintaining the elliptical shape in the flexible shell; an electronic means to energize the electromagnets to generate a rotating electromagnetic field progressively deforming the flexible shell to contact the stator at points of contact that rotate around the stator frictional surface.