Air-isolator fume hood

Ventilation – Workstation ventilator – Covered workbench chamber

Reexamination Certificate

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Reexamination Certificate

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07318771

ABSTRACT:
The present invention is a fume hood capable of exhausting contaminant, having an air pipe in a sash and a suction slot corresponding to the air pipe deposed at the front rim of the bottom surface to obtain an air curtain, where contaminant is efficiently prevented from leakage and energy is saved.

REFERENCES:
patent: 3256799 (1966-06-01), Sterling et al.
patent: 3318227 (1967-05-01), Nelson et al.
patent: 4100847 (1978-07-01), Norton
patent: 5215497 (1993-06-01), Drees
patent: 6428408 (2002-08-01), Bell et al.

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