US PATENT SUBCLASS 417 / 413.2
.~.~.~.~ Piezoelectric driven

Current as of: June, 1999
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417 /   HD   PUMPS

321  DF  MOTOR DRIVEN {32}
410.1  DF  .~ Electric or magnetic motor {10}
412  DF  .~.~ Collapsible wall pump {1}
413.1  DF  .~.~.~ Diaphragm type {2}
413.2.~.~.~.~ Piezoelectric driven

DEFINITION

Classification: 417/413.2

Piezoelectric driven:

(under subclass 413.1) Apparatus wherein the membranelike member is motivated to provide a pumping action by attaching to the membrane a crystalline substance, and a mechanical stress is produced by subjecting the crystalline substance to an electrical voltage.

SEE OR SEARCH THIS CLASS, SUBCLASS:

322, for working chamber of the pump made directly from a material that expands and contracts when subjected to an electric or a magnetic force.

410.2, for piezoelectric driven blade.