Duct air cover

Details Duct air cover Duct air cover

1982-06-02

1984-07-03

Makay, Albert J.

98119, F24F 1310

Patent

active

044572158

ABSTRACT:
A duct air cover is disclosed which allows for the easy escape of air when it is being forced under pressure but cuts off drafts of air not under pressure. Two lightweight air deflector flaps are hinged at opposing sides of an air duct. When temperature controlled air is forced through the duct in question, the lightweight flaps are easily lifted from the register by the air pressure itself thereby allowing for the flow of temperature controlled air. However, when the air is no longer forced, the flaps return to a closed position thus preventing cold drafts of air from flowing out through the ducts.

REFERENCES:
patent: 1309430 (1919-07-01), Woodall
patent: 1709650 (1929-04-01), Allen
patent: 2074024 (1937-03-01), Phail
patent: 2631519 (1953-03-01), Sprouse et al.
patent: 3143953 (1964-08-01), Bristol
patent: 3926102 (1975-12-01), Delepeleire
patent: 4108238 (1978-08-01), Vary et al.

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