Draft air control system

Details Draft air control system Draft air control system

1977-05-02

1978-08-15

Ostrager, Allen M.

Stoves and furnaces

Liquid heater

126143, 126242, F24B 702

Patent

active

041064755

ABSTRACT:
A draft air control system for fireplaces comprising a duct having an outside end in fluid communication with outside air and inside end terminating at a location below the fireplace grate, damper means adjustably controlling the cross-sectional area of the duct, hood means covering the inside terminal end. The hood means comprises a throat section passageway in fluid communication with the duct, a second passageway directing airflow in a generally lateral direction and including a downwardly opening outlet to permit essentially unrestricted airflow from the duct into the fireplace beneath the grate and essentially preventing passage of particulate matter into the duct.

REFERENCES:
patent: 948007 (1910-02-01), Doane
patent: 1587227 (1926-06-01), Hallberg
patent: 2740398 (1956-04-01), Collins
patent: 2819711 (1958-01-01), Robinson
patent: 2863443 (1958-12-01), Hoffman
patent: 3845754 (1974-11-01), Wilkening
patent: 3926174 (1975-12-01), Bell
patent: 3976048 (1976-08-01), Ashman

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