A latch assembly connected to the drive unit of a bi-fold door for retaining the bi-fold door secure to a building has elongated straps attached to rotatable latch drums mounted on the outer ends of the drive shaft of the drive unit. Lift drums powered by a motor driven gearbox raise and lower the bi-fold door. Latch assemblies having springs attached to the straps maintain tension on the straps during the opening and closing of the bi-fold door.

The invention relates generally to the field of barrier control systems and in particular relates to barrier control systems, such as a garage door opener, with auxiliary power supply and auxiliary power supply for barrier control systems. A barrier control system, such as a garage door opener, with an auxiliary power supply and an auxiliary power supply for a barrier control system are described. The auxiliary power supply includes a backup battery and a light source that is operable on DC power. The auxiliary power supply includes a sensor to detect whether a DC motor of the barrier control system is powered by the backup battery, and switches on the light source upon detecting the DC motor being powered by the backup battery.

The invention relates generally to the field of barrier control systems and in particular relates to barrier control systems, such as a garage door opener, with auxiliary power supply and auxiliary power supply for barrier control systems. A barrier control system, such as a garage door opener, with an auxiliary power supply and an auxiliary power supply for a barrier control system are described. The auxiliary power supply includes a backup battery and a light source that is operable on DC power. The auxiliary power supply includes a sensor to detect whether a DC motor of the barrier control system is powered by the backup battery, and switches on the light source upon detecting the DC motor being powered by the backup battery.

A latch assembly connected to the drive unit of a bi-fold door for retaining the bi-fold door secure to a building has elongated straps attached to rotatable latch drums mounted on the outer ends of the drive shaft of the drive unit. Lift drums powered by a motor driven gearbox raise and lower the bi-fold door. Latch assemblies having springs attached to the straps maintain tension on the straps during the opening and closing of the bi-fold door.

The invention relates to a drive device for driving an element, having the following: a toothed belt drive with a toothed belt, a frame element which forms two opposite connection plates and a connection wall that connects the two connection plates together, at least three elongated force driving elements which are secured to the toothed belt and are aligned parallel to the width (B) of the toothed belt and parallel to one another and which are arranged within the frame element, wherein a central force driving element is rotationally fixed to the two connection plates, and the end sections of each adjacent outer force driving element extend through curved elongated holes of the connection plate, whereby the outer force driving element can be pivoted and the end faces of the outer force driving elements have cylindrical projections, which are designed as axle stubs and each of which has a roller, outside of one of the connection plates, a toothed disc with tooth recesses for catching teeth of the toothed belt and force driving element recesses for catching the force driving elements, a non-linear guide path, at least some sections of which run parallel to the extension of the toothed belt and in which the rollers arranged on the outer force driving elements are guided, and a drive means which is connected to the frame element and is used to connect to the element to be driven.

In example implementations, a track system of a vertically stacking door includes a vertical track, a track coupling coupled to the vertical track, a first curved track portion coupled to the track coupling, a second curved track portion coupled to the track coupling, and a ramp coupled to the vertical track. The ramp interacts with a cam lever to separate adjacent panels of the vertically stacking door.

In example implementations, a track system of a vertically stacking door includes a vertical track, a track coupling coupled to the vertical track, a first curved track portion coupled to the track coupling, a second curved track portion coupled to the track coupling, and a ramp coupled to the vertical track. The ramp interacts with a cam lever to separate adjacent panels of the vertically stacking door.

A drive carriage for a door, in particular garage door, comprising a body which is linearly shiftably mountable in a rail of a door drive, and a door driver pivotally mounted on the body, wherein a carriage driver which is shiftable relative to the body and is connectable with a power transmission means of the door drive, a latch mounted in the body via a flexible element and is pushable into a recess of the carriage driver by the flexible element, and a latching slide which urges the latch against the flexible element into an unlocking position in which the latch is not pushed into the recess by the flexible element, and which in a drive position permits pushing of the latch into the recess of the carriage driver by the flexible element in order to take a locking position in which the carriage driver is coupled with the body.

An access system for a structure includes a control box mounted within a controlled access space of the structure and operatively coupled to a door panel operator that opens and closes a door panel of the structure for access to the controlled access space. The control box is configured to detect a presence of a security device relative to the control box, determine a position of the security device relative to the structure, and determine an authorization of the security device. The access system also includes a user interface mounted in an uncontrolled access space of the structure and coupled in communication with the control box. Upon actuation of the user interface, the control box operates the door panel operator when the security device is positioned proximate the control box, located in the uncontrolled access space of the structure, and authorized to operate the door panel.

An access system for a structure includes a control box mounted within a controlled access space of the structure and operatively coupled to a door panel operator that opens and closes a door panel of the structure for access to the controlled access space. The control box is configured to detect a presence of a security device relative to the control box, determine a position of the security device relative to the structure, and determine an authorization of the security device. The access system also includes a user interface mounted in an uncontrolled access space of the structure and coupled in communication with the control box. Upon actuation of the user interface, the control box operates the door panel operator when the security device is positioned proximate the control box, located in the uncontrolled access space of the structure, and authorized to operate the door panel.