Abstract: A piezoelectric motor comprising a stator; a rotor having a rotor inner circumferential surface; a piezoelectric element retained on the stator; power supply means in communication with said piezoelectric element to operably effect longitudinal resilient mechanical oscillations in the element; a plurality of pusher members each having (a) at least one first portion defining a pusher abutting surface abutting the rotor inner surface, (b) at least one second portion defining a piezoelectric element engaging surface distal of the pusher abutting surface, and (c) a third portion defining a retained surface; retainer means in abutment with the pusher member retained surface to releasably retain the pusher member in abutment with the piezoelectric element engaging surface and the rotor inner surface and wherein the longitudinal resilient mechanical oscillations effect coplanar movement of the pusher member; and the first portion is so shaped and inclined as to operably effect circumferential movement of the circumf

Abstract: A piezoelectric motor having a stator and a rotor. The stator and the rotor are in mechanical contact with one another along at least one cylindrical friction surface by means of curved, elastic and longitudinally elongated pusher plates, the pusher plates being held against the friction surface at a first end of the pusher plates, and arranged at an angle to the friction surface. A piezoelectric element is connected to either the rotor or the stator. The piezoelectric element has electrodes placed on opposing surfaces of the piezoelectric element, and is connectable to an alternating current source via the electrodes for providing longitudinal oscillations in the piezoelectric element. A first ring plate and a second ring plate are arranged on opposite sides of the piezoelectric element, so that at least a portion of surfaces of the piezoelectric element are pressed against surfaces of the first ring plate and the second ring plate, respectively, by a clamping device.