Abstract: The invention relates to an emergency release device (4) for a building closure operator (2) for decoupling a motorized building closure from a motor operator assembly (6, 9) under emergency conditions. To diminish the risk of injury by free-fall of a decoupled building closure wing by a simple and cost-effective design the invention proposes providing a safety or securing means (24) which safeguards or secures the emergency release device (4) against unintentional or unauthorized actuation.

Abstract: The invention relative to a shaft operator assembly (8) for powering a door (2) comprising a movable door leaf (4) and a door shaft (6) geared to the door leaf (4) for common movement, including a shaft connecting means (20) for connecting a driven member (35) of the shaft operator assembly (8) to the door shaft (6).

Abstract: A separating device for a door leaf that is moveable overhead has a coupling element movable between a coupling position, in which the coupling element couples an output element of the drive device to the structural component, and a freewheeling position, in which the output element of the drive device is decoupled from the structural component. A locking member is provided which is movable between at least one release position, in which the locking member allows a movement of the coupling element into the freewheeling position, and at least one locking position, in which the locking member counteracts a movement of the coupling element into the freewheeling position. The locking member can be coupled to the drive device.