US PATENT SUBCLASS 417 / 410.3
.~.~ Rotary expansible chamber pump

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}
410.3.~.~ Rotary expansible chamber pump {2}
410.4  DF  .~.~.~> Interengaging rotary pumping members
410.5  DF  .~.~.~> Helical pumping member having planetary movement (e.g., scroll)

DEFINITION

Classification: 417/410.3

Rotary expansible chamber pump:

(under subclass 410.1) Apparatus wherein a pumping member is turning in a single direction about a fixed or movable axis thereby increasing and decreasing volume of an enclosed space which is adapted to receive and discharge a fluid.