Patent ID: 6239533
Filing Date: 2001-05-29
Classification: H02N

Abstract:
A piezoelectric linear stepping motor comprising:a) a housing having an inner surface;b) first and second cylindrical, hollow piezoelectric units attached to the inner surface of the housing, each of the piezoelectric units being in separate transverse planes, the first piezoelectric unit having a cylindrical shifting piezoelectric cell, a cylindrical fixing piezoelectric cell attached to the shifting piezoelectric cell, and a friction member attached to the fixing piezoelectric cell, the second piezoelectric unit having a cylindrical fixing piezoelectric cell, and a friction member attached to the fixing piezoelectric cell; andc) a shaft, which frictionally interacts with at least one friction member, the shifting and fixing cells of the first piezoelectric unit and the fixing cells of the second piezoelectric unit being configured to operate sequentially in order to linearly move the shaft.