US PATENT SUBCLASS 454 / 188
HAVING PROTECTING AIR CURRENT

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

188HAVING PROTECTING AIR CURRENT {5}
189  DF  .~> Surrounding protected area
190  DF  .~> Including plural, layered currents
191  DF  .~> Including suction outlet
192  DF  .~> Including current adjusting mean
193  DF  .~> Cabinet enclosure (e.g., display case, etc.)

DEFINITION

Classification: 454/188

HAVING PROTECTING AIR CURRENT:

(under the class definition) Subject matter comprising an air jet or air sheet forced across an opening to a (ventilated) space to prevent entrance of dust, flies, or other debris into the space.

SEE OR SEARCH THIS CLASS, SUBCLASS:

60, for a covered workbench chamber having an access opening which acts as an air outlet from the chamber.