A door closer may utilize a door closing device (e.g., spring) and a force adjustment device (e.g., a motor) in order to allow for manual door opening and assisted door closing. During operation, as a door is manually opened, the spring is loaded (e.g., compressed or tensioned) above its pre-loaded closed position state. Once manual opening is completed, the spring that is loaded during opening begins returning to the pre-loaded closed position state, and thus, moves the door automatically towards the closed position. Depending on the pre-loaded spring setting, the closing force of the door may not be enough to close the door, or to close the door with the preferred force. As such, during closing a controller may engage a motor not to drive the door directly, but to increase the pre-load of spring to increase the closing force in order to allow the door to close as preferred.

A door closer assembly for an entryway device having a position sensor that assists in determining the location of the door closer assembly, and thus the location of the associated entryway device, relative to at least an entryway. The position sensor can be coupled to, and/or part of, the door closer assembly. Information obtained by the position sensor may be used by one or processing devices of an access control system to determine whether the door closer assembly and/or the entryway device is at the closed location, among other locations, as well as the direction(s) of displacement of the entryway device. Such information may be utilized in calibrating other devices, as well as determining the occurrence of a number of events, including unauthorized displacement or holding of the entryway device. A timer may also be utilized to further evaluate the nature of the displacement of the entryway device.

A door closer assembly for an entryway device having a position sensor that assists in determining the location of the door closer assembly, and thus the location of the associated entryway device, relative to at least an entryway. The position sensor can be coupled to, and/or part of, the door closer assembly. Information obtained by the position sensor may be used by one or processing devices of an access control system to determine whether the door closer assembly and/or the entryway device is at the closed location, among other locations, as well as the direction(s) of displacement of the entryway device. Such information may be utilized in calibrating other devices, as well as determining the occurrence of a number of events, including unauthorized displacement or holding of the entryway device. A timer may also be utilized to further evaluate the nature of the displacement of the entryway device.

An electric side door drive assembly for a vehicle having a length-adjustable electric actuator to bring about opening and closing of the side door, and a door movement sensor unit designed to detect stopping and a current position of the side door during opening or closing of the side door. In the event of stopping of the side door detected by the door movement sensor unit, a controller determines, on the basis of side door position data provided by the door movement sensor unit, a necessary current strength which is to be supplied to the electric motor to hold the side door in its current position, and to deliver the necessary current strength to the motor of the actuator for a holding operation.

A work vehicle includes a vehicle body frame, an engine hood, a first extendable member, and a second extendable member. The vehicle body frame is configured to support an engine. The engine hood has a cover frame coupled to the vehicle body frame so as to allow opening and closing, and an engine cover attached to the cover frame. The first extendable member is coupled to the vehicle body frame and the cover frame. The first extendable member is disposed at one end side relative to a center in a vehicle width direction of the work vehicle. The second extendable member is coupled to the vehicle body frame and the cover frame. The second extendable member is disposed at an other end side relative to the center in the vehicle width direction of the work vehicle.

An electromechanical door supporting system for temporarily maintaining a door in an open position having: a) a housing with an electric motor in communication with a power source; b) a base plate sized to pass underneath a swinging door; c) the base plate extending away from the housing; d) the electric motor causing rotational movement in a rod extending from inside the housing, to outside the housing and over a surface of the base plate; e) a door supporting element extending perpendicular to the extended rod; and f) the door supporting element being attached to the extended rod at a proximal location and extending over the surface of the base plate to a distal end so that rotation of the extended rod causes the distal end of the door supporting element to elevate above the base plate to secure an opened door.

A device for locking a leaf of a door or the like comprising at least one electric motor operated as a generator having a motor shaft which is operatively connected to the leaf via a force transmission unit. The motor terminals of at least one electric motor operated as a generator are connected in this regard to a damping circuit for damping the leaf movements. The motor shaft of at least one electric motor operated as a generator is acted on by a brake unit to lock the leaf.

A system for the fixing and/or emergency opening of a leaf of a door, a window or the like comprises a drive having at least one mechanical energy storage device, which is charged by an opening movement of the leaf and is discharged by a closing movement of the leaf, at least one electric motor, the motor shaft of which is operatively connected to the leaf, and open-loop and/or closed-loop control electronics for actuating the electric motor. The electric motor can be actuated by means of the open-loop and/or closed-loop control electronics both for generator-like damping of the leaf movements and for fixing of the leaf against the force of the mechanical storage device and/or for electric motor-driven emergency opening of the leaf, in that the electric motor additionally can be supplied with external electrical energy from an external device, in particular such as a smoke detector control unit, a smoke and heat extraction control unit or the like, for the fixing and/or emergency opening of the leaf.

A device for manually and/or electromotively adjusting or securing a first vehicle part and a second vehicle part relative to each other is provided. The device comprising an adjustment part which has a joint for pivotable arrangement on the first vehicle part, wherein the adjustment part is to be arranged on the first vehicle part in such a manner that, when the vehicle parts are adjusted relative to each other, the adjustment part moves relative to the second vehicle part, a traction cable which is fastened at a first end and at a second end to the adjustment part, and a cable drum which is to be arranged on the second adjustment part, is rotatable about a longitudinal axis and on which the traction cable is arranged.

A method for controlling a door, comprising the steps of storing energy during a manual opening of a door, sensing an object within a doorway, selectively applying a force derived from the stored energy, to close the door, based on the sensing of an object in the doorway. The closure is preferably controlled by an electronic control. A door closing device comprising an energy storage device for storing energy during door opening and releasing the stored energy to subsequently close the door, a damping system for damping a closure of the door, a sensor for detecting an object within a doorway, having an output, a controllable device for selectively restraining the energy storage device from closing the door, and a control system for controlling the controllable device based on the output.