Push-pull type ventilation hood

Details Push-pull type ventilation hood Push-pull type ventilation hood

2004-07-08

2010-10-26

McAllister, Steve (Department: 3749)

Ventilation

Workstation ventilator

Covered workbench chamber

C454S058000, C454S063000

Reexamination Certificate

active

07819727

ABSTRACT:
The present invention is a push-pull ventilation hood having a push device to obtain a push air flow and a pull device to exhaust contaminant flow with an exhaust opening and the two devices properly coordinated with each other, wherein, when the push flow flows through a contaminant source, a contaminated flow of the push flow is exhausted through the exhaust opening. Based on the design process according to the present invention, a push-pull hood with the highest efficiency of push velocity can be designed and the push-pull hood can economically and effectively control the contaminant source.

REFERENCES:
patent: 5232152 (1993-08-01), Tsang
patent: 5447468 (1995-09-01), Tener et al.
patent: 5697838 (1997-12-01), Morris
patent: 5716267 (1998-02-01), Hambleton et al.
patent: 6428408 (2002-08-01), Bell et al.
patent: 6461233 (2002-10-01), Gilkison et al.

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