US PATENT SUBCLASS 422 / 227
.~.~.~ Including a draft tube for internal recirculation

Current as of: June, 1999
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422 /   HD   CHEMICAL APPARATUS AND PROCESS DISINFECTING, DEODORIZING, PRESERVING, OR STERILIZING

129  DF  CHEMICAL REACTOR {28}
224  DF  .~ Including internal mixing or stirring means {2}
225  DF  .~.~ Mechanical type stirring means {4}
227.~.~.~ Including a draft tube for internal recirculation

DEFINITION

Classification: 422/227

Including a draft tube for internal recirculation:

(under subclass 225) Apparatus including a draft tube (i.e., a longitudinally extending tubular means open at both ends thereof) located within the reaction chamber and providing, in combination with the stirring means, fluid recirculation within the reaction chamber via fluid movement through the tube.