A method of adjusting the closing force of a door coupled to a door closer assembly having a bias element. The method includes determining the kinetic energy of the door without using the weight or other dimensions of the door. The determined kinetic energy is used to adjust the closing force of an electro-mechanical door closer that includes a spring and a motor. The door includes the use of one, some of, or all of an accelerometer, an angular position sensor, a time to close, a breaking torque, and a controller to identify values of acceleration, velocity, and/or position of the door. The identified values are provided to the controller, which is configured to calculate the kinetic energy of the door. The calculated kinetic energy is used to determine the closing velocity of the door closure to ensure proper operation of the door at the point of installation.

An exemplary door closer has an adjustable size and includes a rotatable member operable to adjust the size and an indicator mechanism configured to indicate the current size. The indicator mechanism includes a cover mounted to a housing of the door closer and a dial rotatably mounted to the cover. The dial is engaged with the rotatable member such that the dial rotates in response to rotation of the rotatable member. The cover includes an indicating region, and the dial includes a display surface including indicia relating to the sizes of the door closer. The display surface is non-perpendicular to the rotational axis of the rotatable member. When the door closer has been adjusted to a particular size, indicia relating to the particular size are indicated by the indicating region.

A shading device including a shading structure displaceable in vehicle-fixed lateral guiding rails between a lowered rest position and a deployed shading position using a drive arrangement. The shading structure in the rest position is lowered down in a vehicle-fixed chamber through a passage, wherein the passage is closable by a cover movable between an open position and a closed position, and a control arrangement for opening and closing the cover is provided and coupled to a displacement movement of the shading structure. The control arrangement includes a control plunger engaging on the cover, which plunger is articulated to the cover in opposed pull and push directions. The control plunger is in operative connection with the cover via a tensioning arrangement which is spring-elastically tensioned in one movement direction and inactively relaxed in an opposite movement direction.

A drive device for a movable furniture part, comprising an ejection force accumulator which can be tensioned, an ejection element mechanically loaded by the ejection force accumulator and used to carry out an ejection movement of the moveable furniture part from a closed position into an open position. The ejection movement can be initiated by a compression movement of the movable furniture part into a compression position which is behind the closed position. The drive device also comprises a tensioning device for tensioning the ejection force accumulator with energy which can be emitted by the ejection movement. During the compression movement, at least 50% of the energy emitted by the ejection force accumulator during the ejection movement can be introduced into the ejection force accumulator by the tensioning device.

An actuator includes a piston assembly movably disposed within an assembly housing having a fixedly supported end and an opposing end that receives a movable piston assembly. The piston assembly includes a piston rod and an attached piston head having a fixed orifice as well as an orifice with a check valve to create rate control of the assembly. Hydraulic fluid is caused to move through the axially movable piston head based on compressive and tensile loads imparted to the assembly. A plurality of pre-loaded springs are configured to selectively provide pressure relief in the event the orifices of the piston become clogged, wherein the plurality of pre-loaded springs, such as disc springs, further provide an energy absorbing function of the assembly based on loading conditions.

A furniture drive includes a carrier configured to be fixed to or within a furniture panel of a furniture carcass, an actuating arm assembly arranged on the carrier, a spring device for applying a force to the actuating arm assembly, an adjustment device for adjusting a force of the spring device to the actuating arm assembly, and a threaded section having a longitudinal direction. An engagement location of the spring device is adjustable along the threaded section by a rotation of an adjustment element about a rotational axis, and the rotational axis of the adjustment element and the longitudinal direction of the threaded section enclose an angle to one another. The angle formed by the rotational axis of the adjustment element and the longitudinal direction of the threaded section is configured to be varied upon a movement of the actuating arm.

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.

An automated door closure system regulate the release and closure of a door in a door assembly that includes a primary door, a secondary door, and a door frame. The system includes a door closer, a control unit, and an automatic input sensor. The door closer, which is connected between the secondary door and the door frame and includes a cylinder and an operating rod, biases the secondary door toward a closed position. The control unit includes a motive device and a rod catch element. The rod catch element, which may be moved by the motor, is positioned in proximity to the operating rod to adjustably prevent the secondary door from being closed. The automatic input sensor detects a door assembly use condition. The control unit controls the motive device based on the detected condition to move the rod catch element, allowing the door closer to close the secondary door.

Provided is a drive device for the movement of a closure element of a motor vehicle relative to a body of the motor vehicle including an outer tube with a longitudinal axis for coupling to the body, an inner element arranged in the outer tube for coupling to the closure element, a helical compression spring arranged between the inner element and the outer tube, and an internal guide element arranged between the inner element and the helical compression spring and axially fixed to the inner element for the internal guidance of an internal guide end section of the helical compression spring. The inner element is extendable along the longitudinal axis from the outer tube. The helical compression spring is compressed against a spring tension of the helical compression spring when the inner element is pulled out of the outer tube.

The invention relates to a furniture connecting fitting, in particular a hinge, preferably a hatch holder, wherein the furniture connecting fitting has a kinematic arrangement (30) with levers and links, and by means of which kinematic arrangement a door or a hatch can be moved from a closed position to an open position, wherein an actuating arrangement (70) acts at the kinematic arrangement (30), wherein the actuating arrangement (70) comprises an actuator (72) and a holder (73), which can be adjusted relative to the actuator (72), wherein the actuator (72) can be moved by a part of the kinematic arrangement (30) and the holder (73) is supported relative to an attachment section (51, 53) or an additional component of the kinematic arrangement (30); in the case of such a furniture connecting fitting, the user is offered a wide range of applications with a small number of parts if provision is made that, in a first mode of operation, the actuating arrangement (70) acts using a damper (71) in a damping manner between the actuator (72) and the holder (73) and, in a second mode of operation, a spring force acting counter to the damping direction is applied directly or indirectly to the actuator (72) and the holder (73) by means of a tension spring (74).