Abstract: A motorized drive system for a louvre assembly of the type containing a surround frame, a pair of spaced apart operating bars positioned within the surround frame and where movement of the operating bars causes rotation of the louvres, the drive system comprising a motor adapted to be positioned within the surround frame, the motor operationally driving a drive shaft which is substantially horizontal when the drive system is fitted within the surround frame, a mounting member which is attached for rotation with the drive shaft, at least two spaced apart attachment points on the mounting member, a first link arm, a second link arm and a third link arm, the first link arm being attached to one of the attachment points and to one said operating bar, the second link arm being attached to another of the attachment points, the third link arm being pivotally attached to the second link arm and to the other operating bar.

Abstract: A motorised drive system for a louvre assembly of the type containing a surround frame, a pair of spaced apart operating bars positioned within the surround frame and where movement of the operating bars causes rotation of the louvres, the drive system comprising a motor adapted to be positioned within the surround frame, the motor operationally driving a drive shaft which is substantially horizontal when the drive system is fitted within the surround frame, a mounting member which is attached for rotation with the drive shaft, at least two spaced apart attachment points on the mounting member, a first link arm, a second link arm and a third link arm, the first link arm being attached to one of the attachment points and to one said operating bar, the second link arm being attached to another of the attachment points, the third link arm being pivotally attached to the second link arm and to the other operating bar.