Seal strips for fume hoods
AssigneeAmerican Hospital Supply Corporation
InventorsRichard C. Tringali, Michael Turko
Life of this patent
Estimating the term…
Abstract
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.
Claims17
In a fume hood having a frame, the frame including a pair of spaced-apart walls providing a sash clearance opening, and a sash having front and rear surfaces and being slidably mounted in the frame for movement within the sash clearance opening between raised and lowered positions, the improvement comprising seal means mounted on one of the pair of spaced-apart walls and extending into the sash clearance opening, the seal means extending toward the sash when the sash is raised whereby the clearance opening between the sash and said one wall is substantially sealed.
In a fume hood having a frame and a sash having front and rear surfaces, the frame including a first wall spaced forwardly from the front surface of the sash and a second wall spaced rearwardly from the rear surface of the sash to provide a sash clearance opening, the sash being mounted in the frame for movement within the sash clearance opening between raised and lowered positions, the improvement comprising front seal means mounted on the first wall and extending toward the front surface of the sash when the sash is raised whereby the sash clearance opening between the sash and the first wall is substantially sealed when the sash is raised, and rear seal means mounted on the second wall and extending toward the rear surface of the sash when the sash is raised whereby the sash clearance opening between the sash and the second wall is substantially sealed when the sash is raised.
Dependencies are inferred from the claim text.