Air control damper assembly
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United States of America Patent
Stats
-
Feb 9, 1988
Grant Date -
N/A
app pub date -
Jul 8, 1987
filing date -
Jul 8, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An air control damper is provided with an actuator coupled to a shaft for operating the blades of the damper. The actuator includes an electric drive motor that turns the shaft by way of a lever that is coupled to the shaft. The lever has a pulley at an outer end and a cable extends from the drive motor around the pulley and back to a fixed point adjacent the motor. When the motor is operated, the cable is wound around the motor drive shaft, pulling the lever towards the motor and turning the shaft. The arrangement provides a mechanical advantage in transmitting the motor output force to the blade actuating shaft.
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