US PATENT SUBCLASS 310 / 323.03
.~.~.~.~.~ Traveling wave motor

Current as of: June, 1999
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310 /   HD   ELECTRICAL GENERATOR OR MOTOR STRUCTURE

300  DF  NON-DYNAMOELECTRIC {4}
311  DF  .~ Piezoelectric elements and devices {17}
321  DF  .~.~ Combined with resonant structure {4}
323.01  DF  .~.~.~ Direct mechanical coupling {5}
323.02  DF  .~.~.~.~ Motor producing continual motion {3}
323.03.~.~.~.~.~ Traveling wave motor {3}
323.04  DF  .~.~.~.~.~.~> Stator {3}
323.08  DF  .~.~.~.~.~.~> Armature {1}
323.11  DF  .~.~.~.~.~.~> Specific material or composition

DEFINITION

Classification: 310/323.03

Traveling wave motor:

(under subclass 323.02) Subject matter wherein two or more groups or piezoelectric elements lying along a driving surface expand and contract in repetitive cycles generating a mechanical output having a crest or high point which appears to move along the surface of the piezoelectric elements along a direction of travel (typically rotary or linearly) whereby a driven surface pressed resiently against the driving surface is carried along the direction of the crest or high point.