American Hospital Supply Corporation

Michael Turko

David F Huempfner

Richard C Tringali

A fume hood is provided with a plurality of removable enclosure panels which cover various components of the hood to which access is necessary from time to time. The panels which must be removed most often are each removable independently of the other panels, and the fasteners for all of the panels are hidden.

Fume hood with removable enclosure panels

A fume hood is provided with seal strips to prevent or inhibit leakage of air through the sash clearance opening at the top of the hood. A front seal is mounted on the rear wall of the auxiliary air chamber and essentially engages the front surface of the sash when the sash is partially or completely raised, and a rear seal is mounted on the front wall of the working chamber and essentially engages the rear surface of the sash when the sash is raised. If desired, either or both of the seals can have a width sufficient to extend all the way across the sash clearance opening when the sash is lowered to seal the sash clearance opening.

Seal strips for fume hoods

A counterbalance for a fume hood is located behind the back of the hood and is connected to each side of the sash by a pair of cable portions which are routed from the counterblanace over the top of the hood by pulleys on the top of the hood. The counterbalance comprises a container which can be filled with a desired amount of weight material, and a roller on the container is engageable with the back of the hood to prevent sliding contact between the counterbalance and the hood. The weight of the sash can be adjusted to equal the weight of the counterbalance by inserting weights into a weight-receiving receptacle formed in the frame member attached to the upper edge of the sash glass.

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Manitowoc, WI, United States of America

Michael Turko