US PATENT SUBCLASS 310 / 323.12
.~.~.~.~.~ Langevin or pencil type 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}
323.12.~.~.~.~.~ Langevin or pencil type motor {1}
323.13  DF  .~.~.~.~.~.~> Output member detail {2}

DEFINITION

Classification: 310/323.12

Langevin or pencil type motor:

(under subclass 323.02) Subject matter wherein an ultrasonic motor comprises either (a) a stator having of a longitudinal-torsional composite resonator or (b) a stack of piezoelectric elements stacked longitudinally in a direction along the length of a generally long cylinderical shaped armature.