Patent ID: 6469420
Filing Date: 2002-10-22
Classification: H02N

Abstract:
A piezoelectric motor comprising:a stator; a rotor, said stator and said rotor being in mechanical contact with one another along at least one cylindrical friction surface by means of curved, elastic and longitudinally elongated pusher plates, said pusher plates being held against said friction surface at a first end of said pusher plates, and arranged at an angle to said friction surface; a piezoelectric element connected to said rotor, said piezoelectric element having electrodes placed on opposing surfaces of said piezoelectric element, said piezoelectric element being connectable to an alternating current source via said electrodes for providing longitudinal oscillations in said piezoelectric element; and a first ring plate and a second ring plate arranged on opposite sides of said piezoelectric element, so that at least a portion of surfaces of said piezoelectric element are pressed against surfaces of said first ring plate and said second ring plate, respectively, by a clamping device, for transferring longitudinal oscillations into said first ring plate and said second ring plate from said piezoelectric element, and at least one of said first ring plate and said second ring plate being in mechanical contact with a second end of said pusher plates, and wherein said transfer of longitudinal oscillations into said first ring plate and said second ring plate from said piezoelectric element takes place via sound-conductive gaskets arranged between said piezoelectric element and said first ring plate and said second ring plate, respectively.