US PATENT SUBCLASS 165 / 123
.~.~.~ With injector-type gas pump

Current as of: June, 1999
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165 /   HD   HEAT EXCHANGE

120  DF  WITH IMPELLER OR CONVEYOR MOVING EXCHANGE MATERIAL {1}
121  DF  .~ Mechanical gas pump {1}
122  DF  .~.~ Heating or cooling means and gas pump in housing {2}
123.~.~.~ With injector-type gas pump

DEFINITION

Classification: 165/123

(under subclass 122) Apparatus wherein the stream from the gas pump passes through a device having a restricted outlet opening for increasing the velocity of the stream.