US PATENT SUBCLASS 454 / 341
.~ With air pump

Current as of: June, 1999
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454 /   HD   VENTILATION

339  DF  HAVING OUTLET AIRWAY {7}
341.~ With air pump {9}
342  DF  .~.~> And having specific emergency smoke handling structure
343  DF  .~.~> Having specific air pump actuator
344  DF  .~.~> Pump induces draft in exit duct
345  DF  .~.~> Having plural suction intakes
346  DF  .~.~> Having vibration absorbing or preventing structure
347  DF  .~.~> Having readily movable air regulating louver,damper, or cover {5}
354  DF  .~.~> Ceiling or wall mounted
355  DF  .~.~> With movable access cover
356  DF  .~.~> Having exterior neck with enlarged, weather resistant cover

DEFINITION

Classification: 454/341

With air pump:

(under subclass 339) Subject matter wherein the air exhausting means includes an air moving apparatus for withdrawing the air out of the building.

SEE OR SEARCH CLASS

181, Acoustics, particularly

212+, for a fluid-conducting-type sound muffler of a general nature and subclass 224 for a sound absorbing ventilating duct or curb.

415, Rotary Kinetic Fluid Motors or Pumps, appropriate subclasses for a blower, per se.

416, Fluid Reaction Surfaces (i.e., Impellers), appropriate subclasses for a fan, per se.

417, Pumps, appropriate subclasses for a motor driven blower, per se.