The motorized drive according to the application is particularly suitable for auxiliary or emergency drives and is configured to open or close a wing of a barrier such as a door. The motorized drive includes a motor and a reduction unit through which the motor can open or close the wing, an auxiliary motor including a helical spring which is able to absorb mechanical energy during the opening of the wing and release it during the closing of the same, a reduction unit connecting the auxiliary motor to the wing. A first and a second toothed profile realize a gear with a variable transmission ratio. The first and/or the second toothed profile form at least one toothing having a pitch profile which is substantially non-circular or not formed by a simple arc of a circle or a straight line.

A door opener includes a mount seat having a bottom wall. A reinforcing seat is fixed to the bottom wall. A driving device for opening or closing the door is detachably coupled to the reinforcing seat and includes a motor. A quick-release device includes a quick-release seat fixed to the bottom wall and having a first coupling portion. The quick-release device further includes a movable member slidably coupled to the quick-release seat and having a movable coupling portion. A control device includes a protective housing and a control panel coupled to the protective housing. The protective housing is detachably coupled with the first coupling portion and the movable coupling portion. The driving device is selectively mounted to make the motor face or face away from the control device. An outer cover covers the driving device and the control device and includes a window in which the control panel is located.

The hold-open arrester arrangement has a hold-open arrester arrangement having a hold-open function to hold a door open. The arrangement has also an electric release arrangement. The release arrangement is arranged to release the hold-open function in a fire alarm situation. The hold-open arrester arrangement comprises a sliding block and an arrester unit. The sliding block is connectable with a slide rail in a sliding manner and also pivotable connectable to an arm of a door closer. The arrester unit is connectable to the slide rail and has a body, said electric release arrangement, and said hold-open function with the sliding block.

The aim of the invention is to achieve a door closer arrangement (1) where the force needed for opening the door (2) is not so substantial. The invention comprises a door closer (6), a slide rail (7), and an arm (8) that connects the door closer with the slide rail. The arrangement comprises also a second rail (9), which is arranged to form a slide slope for the door closer (6).

A system for opening and closing a door within a cabinet is provided. The system includes a motor in communication with a controller to automatically open and close a door. A first plate fixed to the motor shaft to rotate with rotation of the motor shaft, the plate comprises a slot disposed therein. A first leg extends from a door that extends through the slot. A second leg extends from the door. A first sensor moves based upon rotation of the motor shaft, wherein the first sensor can detect relative motion between the motor shaft and the door, wherein when the motor shaft is rotated in the second direction and the first sensor detects relative motion between the motor shaft and the door, the first sensor sends a signal to the controller, wherein upon receipt of the signal the first sensor discontinues sending the second signal to the motor.

A mechanism for influencing the opening and/or closing movement of a wing of a door, a window or the like comprises a sliding arm disposed between the wing and a fixed frame, which is mounted rotatably on one hand on the wing or frame and on the other hand, is guided by a sliding block in a sliding channel disposed on the frame or wing. With this, energy conversion means are assigned to the sliding rail and/or the sliding block, through which the mechanical kinetic energy of the sliding block can be converted to electrical energy, and electrical energy produced in this way can be converted to mechanical energy, in order to supply at least one electrical component with electric current, to generate a braking torque and/or to drive the sliding arm, at least in sections, especially to support the closing and/or opening movement.

A mechanism for influencing the opening and/or closing movement of a wing of a door, a window or the like comprises a sliding arm disposed between the wing and a fixed frame, being mounted rotatably on one hand on the wing or frame and on the other hand, guided by a sliding block in a sliding rail disposed on the frame or wing. Here, energy conversion means are assigned to the sliding rail and/or the sliding block, through which the kinetic energy of the sliding block can be converted to electrical energy, and electrical energy produced in this way can be converted to mechanical energy, in order to supply at least one electrical component with electric current, to generate a braking torque and/or to drive the sliding arm, at least in sections, especially to support the closing and/or opening movement.

A door closer system having a door closer that includes at least one sensor configured to sense an operating characteristic or condition relating to the door closer including a position or speed of displacement of at least a portion of the door closer or an associated entryway device. The sensor(s) can also provide information relating to the performance or condition of one or more components of the door closer, such as the operation of a backcheck mechanism, as well as tracking the number of door cycles. Information obtained by the sensor(s) of the door closer system can be communicated to a lockset device of an entryway control system. The lockset device can be configured to communicate information received from the door closer system to an access control system, which can in turn provide the communicated information to a management system.

The present invention relates to the technical field of door closers, and particularly discloses an electromagnetic release door closer. The electromagnetic release door closer comprises a door closer body, a slide rail, and a rocker arm, one end of the rocker arm is articulated with the door closer body, wherein the slide rail is provided with a slide groove and a slide cavity which are parallel to each other, a through slot which is parallel to the slide groove is arranged between the slide groove and the slide cavity, wherein an electromagnetic limiting mechanism can be fixed at any position in the slide cavity. In the electrified state of an electromagnet, an electromagnetic attracting plate and the electromagnet are in a fixed state under the action of magnetic force, a limiting latch bolt is located in the slide groove, and is used to limit the sliding of a slider in the slide groove, and under this state, the slider can slide freely between the limiting latch bolt and one end of the slide groove, that is, a door leaf can move freely between a position limited by the limiting latch bolt and a maximum opening position. The defect that a door leaf can only be fixed in one specific state in the prior art is overcome, the range of adjustment is wider, and the electromagnetic release door closer is more convenient to use, and can meet more use requirements.

A door drive apparatus for adjusting a vehicle door relative to a vehicle body including an adjustment part for power transmission between the vehicle door and the vehicle body, a drive motor and a gear assembly coupling the drive motor to the adjustment part. The gear assembly includes a guide rail and a sliding element guided longitudinally on the guide rail along an adjustment direction, which is adjustable by the drive motor and is coupled to the adjustment part, and the guide rail includes two legs extended parallel to each other along the adjustment direction and the sliding element is guided between the legs along the adjustment direction.