Patent ID: 7730930

Claim:
In combination, a gearmotor and a pulley, the gearmotor fixable with the pulley, the combination comprising: the gearmotor comprising a rotating pin comprising an outer surface for receiving the pulley and a cavity having a bottom surface, a locking element received entirely in the cavity, the locking element being movable in the cavity relative to the rotating pin between a first and a second locking position and between the second and first locking position, the first locking position being one where the rotating pin and the pulley are retained together, the second locking position being one where the rotating pin and the pulley are not retained together, a plurality of flexible arms disposed on the locking element for biasing the locking element in the first locking position without flaring the rotating pin, each arm comprising a locking tooth disposed at a first end of the respective arm; a user-operable element disposed on the locking element for axially moving the locking element relative to the rotating pin from the first to the second locking position inside the cavity responsive to a user.