| CPC B66B 13/12 (2013.01) | 18 Claims |

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1. A coupler device of a door coupler engageable with a vane member, the coupler device comprising:
a housing;
a shaft rotatable about an axis; and
at least one rotary magnet arranged within an interior of the housing, the at least one rotary magnet being coupled to the shaft;
wherein the coupler device is transformable between an off configuration and an on configuration in response to rotation of the shaft about the axis and the coupler device is magnetically couplable with the vane member when in the on configuration.
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