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US 6,582,292 B1Granted
Fume hood with rotatable airfoil
AssigneeFisher Hamilton L.L.C.
InventorJohn M. Bastian
Life of this patent
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AssigneeFisher Hamilton L.L.C.
InventorJohn M. Bastian
Estimating the term…
A fume hood includes a top, bottom sidewalls, front panel and a back panel that define an enclosed workspace. The fume hood also includes a movable sash for opening and closing an access opening and an airfoil disposed proximate an edge portion of the opening to direct airflow through the opening and into the workspace. The airfoil is automatically raised from a down position to an up position when the sash is raised to a predetermined height. In addition, the airfoil may be automatically raised when the velocity of the airflow into the access opening decreases below a predetermined value. Once raised, the airfoil may be automatically or manually lowered to the down position. In one embodiment, the airfoil includes one or more fins having an angled portion that extends downwardly below the work surface of the fume hood when the airfoil is in the down position, thereby reducing the possibility of a potential spill when the technician removes an item from the workspace.
A fume hood apparatus, comprising:
A fume hood apparatus, comprising:
A fume hood apparatus, comprising:
A method of minimizing airborne contaminants from escaping through the face of a fume hood apparatus, the fume hood apparatus including an enclosure defining a workspace and an access opening, a movable sash for closing the access opening, and an airfoil member, the method comprising the steps of:
A method of minimizing airborne contaminants from escaping through the face of a fume hood apparatus, the fume hood apparatus including an enclosure defining a workspace and an access opening, a movable sash for closing the access opening, and an airfoil member, the method comprising the steps of:
Dependencies are inferred from the claim text.