Self-closing exhaust fan cover

Details Self-closing exhaust fan cover Self-closing exhaust fan cover

1977-05-06

1978-12-26

Ostrager, Allen M.

98119, 98 43R, F04D 2514

Patent

active

041310608

ABSTRACT:
A fan cover assembly adapted to cover a fan when not in use and permitting the passage of air in the exhaust direction while the fan is operating. The fan cover assembly includes a frame having openings and a valve element secured to the frame and biased against the frame to close the openings when the fan is off. The valve element is pulled back from the openings to allow air to pass in the exhaust direction when the fan is operating.

REFERENCES:
patent: 1189572 (1916-07-01), Ilg
patent: 2812703 (1957-11-01), Tobey
patent: 3202083 (1965-08-01), Eichhorn
patent: 3472150 (1969-10-01), Strawsine
patent: 3479947 (1969-11-01), Myers

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