APPARATUS FOR DIRECTING AIR FLOW IN A BIOLOGICAL SAFETY CABINET
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United States of America Patent
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Issued Date -
Nov 17, 2011
app pub date -
May 11, 2010
filing date -
May 11, 2010
priority date (Note) -
Abandoned
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Abstract
A biological safety cabinet with several air flow directional control enhancements. A perforated air intake grille within the work chamber inwardly adjacent the user access opening has a forwardly facing make-up air intake surface and a rearwardly facing internal air intake surface angled in converging relation to promote a physical division between intake of ambient air and internal air into the cabinet's air recirculation system. An aerodynamic user arm rest is affixed to a support stand to extend alongside the access opening at a spacing outwardly from the housing to assist in directing make-up air to the ambient air intake opening without cross-contamination between the arm rest and the work chamber. An air transmission grille above the work chamber has a horizontal main extent terminating at a spacing from the sash and an upwardly angled extent adjacent the sash to direct increased laminar air flow downwardly along the sash.
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