Ventilation – Workstation ventilator – Covered workbench chamber
Patent
1993-05-24
1995-01-10
Joyce, Harold
Ventilation
Workstation ventilator
Covered workbench chamber
55274, B08B 1502
Patent
active
053802446
ABSTRACT:
A safety cabinet having a work area enclosed by a hood structure and including an air circulation and cleaning system. The air circulation and cleaning system includes a plurality of air ducts and passageways through which air is circulated by a blower within the cabinet. A portion of the air exiting the blower is directed through an exhaust after passing through a first filter and the remaining portion of the air exiting the blower is directed through the work area after passing through a second filter. A pressure gauge is connected between the first and second filters for measuring the pressure differential between the two filters to give an indication of the loading and efficiency of the filters. A third filter is disposed upstream of the pressure gauge to remove airborne contaminants in the air flowing to the gauge to prevent such contaminants from leaking from the gauge.
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Forma Scientific, Inc.
Joyce Harold
LandOfFree
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