US PATENT SUBCLASS 454 / 61
.~.~ Having outlet airway flow adjustment means

Current as of: June, 1999
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454 /   HD   VENTILATION

49  DF  WORKSTATION VENTILATOR (E.G., HOOD, OFFTAKE, ETC.) {5}
56  DF  .~ Covered workbench chamber (e.g., fume hood, etc.) {2}
61.~.~ Having outlet airway flow adjustment means {1}
62  DF  .~.~.~> Plural airways with adjustable distribution means

DEFINITION

Classification: 454/61

Having outlet airway flow adjustment means:

(under subclass 56) Subject matter comprising a passage for exhausting air from the task area and further comprising means to alter direction or rate of flow of air flowing through the passage.