US PATENT SUBCLASS 415 / 97
.~ Pump impeller means

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.~ Pump impeller means {2}
98  DF  .~.~> Impeller blades extending from opposite sides of common central support
99  DF  .~.~> Plural axially spaced impellers {1}

DEFINITION

Classification: 415/97

(under subclass 93) Apparatus in which the runner* member is moved by a force and acts to increase the velocity, head or pressure of a fluid on which the runner* acts.

SEE OR SEARCH THIS CLASS, SUBCLASS:

120, for a pump* runner* in which the working fluid* enters radially and discharges axially.