Patent ID: 7188481
Filing Date: 2007-03-13
Classification: F24F

Abstract:
1. A damper actuator for actuating a damper in a vent or duct, the damper having a fully open and a fully closed position, the damper actuator comprising: a drive shaft for moving the damper during normal operation of the damper; a drive mechanism for driving said drive shaft, wherein said drive mechanism is a motor for rotating said drive shaft in a first direction; a first adjustment lever for permitting said drive shaft to rotate a certain amount in the first direction during normal operation of the damper as determined by a set adjustment of the first adjustment lever; a second adjustment lever for permitting said drive shaft to rotate an amount in a second direction during normal operation of the damper as determined by a set adjustment of the second adjustment lever; and a spring for providing rotational tension to said drive shaft in the second direction.