1975-11-14
1977-07-19
Camby, John J.
98 43C, 98 66A, 98 82, 98116, F24F 706
Patent
active
040361209
ABSTRACT:
A dual purpose design for a powered discharge roof ventilator has a fan mounted in a body housing having a bottom opening to be positioned in the roof structure, a top wall weathering the opening, and inclined side openings for the discharge of air. Hinged flaps guide the discharging air and close the openings to water entry when the fan is stationary. The flaps are capable of being mounted either to direct discharging air upwardly or downwardly. Automatic flap locking and unlocking means secure the flaps closed when the fan is non-operative and unlock when the fan is started up.
REFERENCES:
patent: 1897440 (1933-02-01), Richardson
patent: 1907727 (1933-05-01), Breident
patent: 2332552 (1943-10-01), Belanger
patent: 2588289 (1952-03-01), Pouliot
patent: 3202080 (1965-08-01), Cook
patent: 3212425 (1965-10-01), Hazen et al.
patent: 3396652 (1968-08-01), Morrison et al.
patent: 3412670 (1968-11-01), Jenn et al.
Camby John J.
Colt International Limited
Yuen Henry C.
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