Ventilation – Having outlet airway – With air pump
Patent
1991-04-12
1992-06-23
Joyce, Harold
Ventilation
Having outlet airway
With air pump
454343, 454347, 454350, 236 44C, F24F 1100
Patent
active
051238756
ABSTRACT:
A power actuated roof vent apparatus generally comprises an insulated air passageway housing through the roof which allows a linear and unrestricted air flow through the air passageway housing when the apparatus is in operation and an insulated passageway closure lid which positively closes the air flow through, and prohibits water ingress into, the air passageway housing when the apparatus is not in operation. The apparatus further comprises a power actuated fan assembly positioned within the air passageway housing to move large volumes of air with low noise levels and low power requirements; a power actuated closure assembly to open and close the passageway closure lid remotely and provided with an emergency backup power source in order to close the passageway closure lid in the event of a line power failure; and a power actuated switching system to coordinate operation of the fan with the opening and closing of the passageway closure lid, and, alternatively, to activate closing of the passageway closure lid upon the occurrence of intruding rain or snow or in the event of a fire.
REFERENCES:
patent: 1971920 (1934-08-01), Ross
patent: 2159498 (1939-05-01), Birkholz
patent: 2612831 (1952-10-01), Lohman, Jr.
patent: 3116679 (1964-01-01), Solem
patent: 3307469 (1967-03-01), Bohanon
patent: 4036120 (1977-07-01), Burtenshaw
patent: 4633769 (1987-01-01), Milks
patent: 4911065 (1990-03-01), Van Becelaere
Eubank Mark A.
Eubank Michael P.
Eubank Manufacturing Enterprises, Inc.
Joyce Harold
Sefrna Ronald B.
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