An exemplary method involves operating a door operator coupled to a door. The door operator includes a motor operable to move the door in at least one direction and a controller operable to control the motor. The method generally involves a calibration procedure including: with the door at a first position and the door having an initial speed, initiating, by the controller, measurement of a time duration; in response to the door reaching a target speed different from the initial speed, ceasing, by the controller, measurement of the time duration; and determining, by the controller, a maximum speed based on the time duration. The method further includes performing at least one operation based upon the maximum speed.

Proposed is a hinge device having tension maintaining function, the hinge device including: a winding member affixed to a main body of a mounted structure having an inner space formed therein; a hinge member affixed to a door that opens or closes the inner space and mounted on the winding member so as to enable the door to be pivotable; and a tension member having one end affixed to the winding member and the other end affixed to the hinge member, such that the tension member transmits a tension to the door when opening and closing the door.

A window operator handle and cover with magnetic features that enable the handle to be retained to the cover in a folded position. The operator cover can also be attached to the operator with magnets.

A domestic appliance includes: an appliance housing which provides an appliance compartment and has a loading opening for access to the appliance compartment; an appliance door mounted so as to be rotatable about a pivot axis for closing the loading opening; a motor unit in operative connection with the appliance door and by which the appliance door is transferrable from an open position to a closed position closing the loading opening; and a clutch device arranged between the motor unit and the appliance door and in operative connection with the motor unit on a drive side thereof and with the appliance door on a driven side thereof. The clutch device has a clutch that is switchable and transferrable from a disengaged position to an engaged position and vice versa, the clutch causing an automatic switching from the disengaged position to the engaged position during operation of the motor unit.

Mechanism for the movement of a wing of furniture with a downward folding opening, designed to be placed on one side of the furniture item, the mechanism being contained in a box consisting of two half-shells, and including a hinge including a plurality of levers, articulated one in relation to the other, to the box and to the wing for the movement of the latter, one of the levers being able to slide in a track formed in the box, another of the levers being able to rotate around a fulcrum point provided on the box and acting with one of its ends on the front side of a linear slider, the rear side of which acts on one end of a rocker lever, whose other end acts on.

A sliding door roller fitting includes a tilting lever having a long and short arm angled thereto. The long arm has a freely rotatably mounted running roller which projects beyond the long arm to roll along a running rail. The short arm has an outwardly curved outer side facing away from the running roller. The tilting lever is held on a sliding door-side bearing body and is tiltable between two end positions about a tilting axis parallel to a running roller tangent. The bearing body has at least one planar bearing surface which extends horizontally in the setting-out direction in the mounting position of the bearing body. The short arm of the tilting lever bears by its curved outer side against the bearing surface and rolls thereon during tilting of the tilting lever. The bearing body has two driving stops between which the tilting lever is arranged.

A mechanism (1) for pivoting a charging or tank flap (2) on a charging or filler neck housing (3), which is accommodated or can be accommodated in a body component of a motor vehicle, wherein the mechanism (1) is configured, by superposing at least two at least temporarily simultaneous circular rotational movements having different rotation radii or at least one at least temporarily simultaneous circular rotational movement and at least one linear movement, to pivot the charging or tank flap (2) reversibly between a first orientation, in particular a closed position of the charging or tank flap (2), and a second orientation, in particular an open position of the charging or tank flap (2).

A side-open left-right-door arbitrary-opening structure of a refrigerator comprises four hinge shafts are fixedly connected at left and right sides of a refrigerator body in pairs respectively, left and right sides of upper and lower end faces of a refrigerator door are all provided with an opening neck, each hinge shaft is correspondingly placed in one opening neck, four hinge shaft stoppers are slidably arranged on the upper and lower end faces of the refrigerator door in pairs respectively, one spring is arranged between two hinge shaft stoppers in each pair, tail ends of the hinge shaft stoppers on the upper and lower end faces of the refrigerator door extend into the opening necks at the corresponding sides, and the hinge shafts at the corresponding sides are positioned in the opening necks.

Movement system for a closure structure with folding movement, comprising a transmission hinge which connects a first panel to a second panel of the closure structure. The transmission hinge has a first wing fixed to the first panel, a movement lever hinged to the first wing around a first axis, and a second wing which is hinged to the movement lever around a second axis and is fixed to the second panel. The movement system comprises a transmission mechanism which, following the rotation of the first panel, drives the movement lever to rotate around the first axis. The transmission hinge comprises a gear connecting the first wing to the second wing so that, following the rotation of the movement lever, the second wing is actuated by such gear to rotate around the second axis in order to make the second panel rotate with respect to the first panel.

A hinge for opening and closing a tank or charging flap has two lever arms which are connected to one another in an articulated manner. A first lever arm is designed for connection to a tank or charging flap and a second lever arm is designed for connection to a component fastened to a vehicle. A drive is provided in order to pivot the two lever arms relative to one another about a pivot axis. The drive is an actuator that is received on or in one of the lever arms.