Positive opening damper for combustion appliance

Details Positive opening damper for combustion appliance Positive opening damper for combustion appliance

1983-06-21

1985-09-03

Scott, Samuel

Combustion

Timer, programmer, retarder or condition responsive control

Of or by exhaust damper or exhaust pump

236 1G, 126 85B, 126285R, F24C 300

Patent

active

045389802

ABSTRACT:
A normally energized motor maintains a counterbalanced damper closed to block air inflow in a non-combustion condition of an appliance. Deenergization of the motor by thermostat control releases a rotor for displacement through a limited angular stroke. Through a lost-motion linkage connection the damper is displaced, in lagging relation to the rotor to the open position. The open position of the damper is detected by a sensor to open a fuel valve in the appliance.

REFERENCES:
patent: 1193271 (1916-08-01), Kuntz
patent: 4039123 (1977-08-01), Frankel
patent: 4079884 (1978-03-01), Sherman
patent: 4185769 (1980-01-01), Nezworski
patent: 4193541 (1980-03-01), Scheidweiler
patent: 4205783 (1980-06-01), Dietsche
patent: 4251024 (1981-02-01), Feinberg
patent: 4426993 (1984-01-01), Hoyme

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