Patent ID: 8183743
Filing Date: 2012-05-22
Classification: H01L,H02N,Y10T

Abstract:
1. A tubular linear piezoelectric motor, comprising: a resonator formed of a cylindrical tube of length an inner electrode formed of a conductive material disposed on an interior surface of said cylindrical tube; one or more annular protrusions, each disposed at a different unique location on an exterior surface of said cylindrical tube, each said unique location spaced a different distance a first outer electrode provided for each annular protrusion, each of said first outer electrode formed of a conductive material disposed on said exterior surface of said cylindrical tube, and respectively located on one side of a respective one of said annular protrusions; and wherein each of said annular protrusions comprises a contact site, and said cylindrical tube is configured to move said contact site along a respective elliptical path when said resonator is excited with one signal having a single exciter frequency that is applied across said inner electrode and said first outer electrodes.