Operator assembly for movable barrier

An operator for a movable barrier, the movable barrier comprising a roller closure, the roller closure mounted on a rotating carrier assembly, the operator comprising an output drive to transfer drive to the movable barrier, and a transmission assembly to transfer drive to the output drive, the output drive rotatable in a clockwise direction and in a counterclockwise direction, depending on whether the movable barrier is closing or opening,

• wherein the output drive comprises a rotating crown wheel with an outer face carrying a plurality of shaped attachment portions, each attachment portion configured to receive an output drive extension element to engage with a drum wheel comprised in said rotating carrier assembly,
• the operator including at least one first output drive extension element of a first size and shape and at least one second output drive extension element of a second, different size and shape, each first and second output drive extension element comprising a base portion and an elongated extension portion, the base portion sized and shaped to be received by one or more of said rotating crown wheel outer face shaped attachment portions, wherein said different size and shape of the second output drive extension element relative to the first output drive extension element includes the elongated extension portion of the second output drive extension element having a different cross-sectional shape to the elongated extension portion of the first output drive extension element
• wherein the crown wheel is configured to receive for attachment at least one output drive extension element selected from the at least one first output drive extension element and the at least one second output drive extension element based on one or more physical characteristics of the particular drum wheel of the rotating carrier assembly.

A kit for operating a roller closure, the kit comprising:

• an operator comprising an output drive to transfer drive to the roller closure, the operator comprising a rotating crown wheel having an outer face carrying a plurality of shaped attachment portions, each attachment portion configured to receive an output drive extension element to engage with a roller closure drum wheel, the roller closure drum wheel having one or more apertures located at specific positions, each aperture having a periphery,
• at least one first output drive extension element of a first size and shape,
• at least one second output drive extension element of a second, different size and shape,
• wherein each first and second output drive extension element comprises a base portion and an elongated extension portion, the base portion sized and shaped to be received in one or more of said rotating crown wheel outer face shaped attachment portions and the elongated extension portion sized and shaped to be received in an aperture of the roller closure drum wheel in such a way as to bear on the periphery of the aperture irrespective of whether the output drive is rotating in a clockwise direction or in a counterclockwise direction, wherein said different size and shape of the second output drive extension element relative to the first output drive extension element includes the elongated extension portion of the second output drive extension element having a different cross-sectional shape to the elongated extension portion of the first output drive extension element,
• wherein the crown wheel is configured to receive for attachment at least one output drive extension element selected from the at least one first output drive extension element or the at least one second output drive extension element based on the size and location of each aperture in the particular drum wheel.