Method and apparatus for controlling the speed of a damper blade

Details Method and apparatus for controlling the speed of a damper blade Method and apparatus for controlling the speed of a damper blade

1998-07-01

2000-02-08

Tanner, Harry B.

Automatic temperature and humidity regulation

Ventilator type

Electrically actuated

236 1B, 25112913, F16K 3104

Patent

active

060219556

ABSTRACT:
A device for controlling the movement of a damper mounted in a housing between an open position and a closed position comprises a shaft rotatably secured to the damper for pivoting the damper between an open position and a closed position. A lever arm is mounted on the shaft for rotation therewith, and a spring is connected between the housing and the lever arm for normally urging the damper towards the open position. A motor is mounted on the housing and is actuable to overcome the force of the spring to move the damper to the closed position. A control arrangement associated with the housing is provided for regulating the speed of the damper as the damper moves from the closed position to the open position.

REFERENCES:
patent: 4185770 (1980-01-01), Nagel
patent: 4262652 (1981-04-01), Butzen
patent: 4545363 (1985-10-01), Barchechat et al.

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