Air flow and condition responsive damper

Automatic temperature and humidity regulation – Ventilator type

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Details

236 9A, 236 84, 98102, 98106, F24F 1306

Patent

active

043949584

ABSTRACT:
Apparatus for controlling the air flow from a register of a forced air heating system. The apparatus includes walls forming a housing or cover that is adapted to be fastened to and enclose an air outlet register. The walls also form an outlet opening, and a pivotable flapper valve or wall is provided that is movable to close the opening. The valve is pivotable between an open position where the opening is not closed, and a closed position where the opening is obstructed, the valve being biased to the open position. The valve is located to be subjected to the force of air moving out of the register and through the housing, this force being such as to urge the valve to the closed position. The apparatus further includes a latch for holding the valve in the open position against the force of the moving air, and an electric control for disabling the latch in the presence of the flow of air. The electric control may be manually operated or it may be responsive to the ambient temperature conditions.

REFERENCES:
patent: 2274614 (1942-02-01), Nessell
patent: 3158319 (1964-11-01), Nelson
patent: 3776214 (1973-12-01), Coffman
patent: 4277019 (1982-07-01), Shreve

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