Damper

Details Damper Damper

1977-08-18

1979-08-21

Taylor, Dennis L.

Stoves and furnaces

Dampers

Electric

1262855, 236 68A, F23N 300

Patent

active

041649362

ABSTRACT:
A damper assembly constructed to close a flue pipe for a burner during non-use of the burner and to automatically open prior to burner ignition. An actuator operated by a thermo-statically controlled heater and an expansible fluid, rotates a baffle of the damper assembly to open the flue pipe. A safety interlock requires the baffle to be opened before the burner is ignited. When the burner is turned off, the actuator delays closing of the baffle for a time to allow exhausting of residual combustion products. In one embodiment, two baffles are operated to close a flue pipe above and below a draft diverter.

REFERENCES:
patent: 1549653 (1925-08-01), Corson
patent: 2259973 (1941-10-01), Firehammer
patent: 2761494 (1956-09-01), Field
patent: 3976244 (1976-08-01), Logsdon
patent: 4005820 (1977-02-01), Cress
patent: 4076171 (1978-02-01), Swenson
patent: 4084743 (1978-04-01), Matthews et al.

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