US PATENT SUBCLASS 415 / 99
.~.~ Plural axially spaced impellers

Current as of: June, 1999
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415 /   HD   ROTARY KINETIC FLUID MOTORS OR PUMPS

93  DF  AXIALLY OPPOSED WORKING FLUID PATHS TO OR FROM RUNNER (E.G., END BALANCE, ETC.) {4}
97  DF  .~ Pump impeller means {2}
99.~.~ Plural axially spaced impellers {1}
100  DF  .~.~.~> Serially arranged in working fluid path

DEFINITION

Classification: 415/99

(under subclass 97) Apparatus comprising two or more runner* members secured to a driven shaft*, each member in a separate radial plane through the shaft*.