US PATENT SUBCLASS 454 / 57
.~.~ Having air inlet separate from access opening

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


454 /   HD   VENTILATION

49  DF  WORKSTATION VENTILATOR (E.G., HOOD, OFFTAKE, ETC.) {5}
56  DF  .~ Covered workbench chamber (e.g., fume hood, etc.) {2}
57.~.~ Having air inlet separate from access opening {2}
58  DF  .~.~.~> Including flow adjustment means {1}
60  DF  .~.~.~> And air outlet through access opening

DEFINITION

Classification: 454/57

Having air inlet separate from access opening:

(under subclass 56) Subject matter comprising an inlet passage for admitting air to the task area, which passage is distinct from an aperture which allows admittance to the area by the operator.

(1) Note. A device having an inlet passage which is adjacent the aperture is included in this subclass provided the airway is physically separated from the aperture.

SEE OR SEARCH THIS CLASS, SUBCLASS:

51+, for a spray booth having an air inlet separate from an access opening.

66, for a workstation ventilator, in general, which has an inlet airway.