Ventilation – Having both inlet and outlet airways – Pressure regulation
Patent
1991-02-19
1992-03-31
Joyce, Harold
Ventilation
Having both inlet and outlet airways
Pressure regulation
553852, 454239, 454259, 454191, 454187, F24F 1100
Patent
active
050997513
ABSTRACT:
A decontamination chamber entranceway to an asbestos removal work area includes rigid swinging doors for a rapid escape from the contaminated work area due to an emergency such as a fire or smoke. Also during a power failure it is easy for the workers to leave the work area through the rigid swinging doors of the invention. Each of the doors may include an air inlet opening having at least one plastic flap covering the inlet opening which allows suitable amounts of air to flow through the inlet to maintain a negative air pressure in the work area while having air flow in the work area sufficient to change the air at least every 10 to 15 minutes. The plastic flaps of the doors are preferable pivotally-mounted rigid clear plastic which seal automatically upon loss of negative air pressure in the work area. The rigid flaps can be electro-mechanically operated to positively control size and functioning of air inlet openings and close off the openings upon emergency conditions.
REFERENCES:
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patent: 4113175 (1978-09-01), Sutton, Jr.
patent: 4705066 (1987-11-01), Gut et al.
patent: 4738189 (1988-04-01), White et al.
patent: 4850264 (1989-07-01), Kiser
patent: 4911065 (1990-03-01), Van Becelaere
patent: 4960041 (1990-10-01), Kiser
patent: 5004483 (1991-04-01), Eller et al.
Natale Anthony
Newman Gene
GPAC, Inc.
Joyce Harold
LandOfFree
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