Draft control arrangement for vent of combustion apparatus

Automatic temperature and humidity regulation – Thermostatic – In fluid controlled

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Details

236 1G, 126285R, 126292, G05D 2302

Patent

active

043378927

ABSTRACT:
A draft control arrangement for a heating apparatus. The draft control arrangement includes a vent damper comprised of one element formed of a shape memory material and another element form of a thermostat material with the elements arranged for coacting to provide a rapid rate of flow passage opening during an initial phase of temperature rise followed by a rate of flow area opening substantially proportional to further temperature rise.

REFERENCES:
patent: 2109628 (1938-03-01), Alban et al.
patent: 4141495 (1979-02-01), Diermeyer
patent: 4227646 (1980-10-01), Hart et al.
patent: 4249694 (1981-02-01), Diermeyer et al.

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