A door component has a controllable damping device and contains a magnetorheological fluid. Two connection units are movable relative to one another. One of the two connection units is connected to a support structure and the other one to a pivotable door unit. The device damps a movement of the door unit between a closed position and an open position in a controlled manner by way of a control unit. The magnetorheological damping device has a piston unit and a cylinder unit surrounding the piston unit. The piston unit divides a cylinder volume into two chambers. The piston unit is equipped with a first one-way valve. The two chambers are connected together, via an external return channel equipped with at least one controllable magnetorheological damping valve, to form a one-way circuit. When the piston unit moves in and out, the magnetorheological fluid flows through the piston unit in the same flow direction.

A method for damping a movement of a door system of a vehicle that is equipped with a damping system having an adjustable and controllable damping action. A movement of the door system between a closed position and an open position is damped in a controlled manner. A measurement of the change in speed of the speed of movement of the door system is calculated and if the change in speed exceeds a predefined limit value, a set, gentle damping action is changed over to a greater damping action.

A door component has a controllable damper device that contains a magnetorheological fluid as a working fluid. Two connection units of the damper device can be moved relative to each other. One of the two connection units can be connected to a support structure, and the other connection unit can be connected to a pivotal door device in order to damp a movement of the door device between a closed position and an open position in a controlled manner. The magnetorheological damper device has a piston unit and a cylinder unit which surrounds the piston unit. The piston unit divides a cylinder volume into two chambers. The piston unit has a first piston rod, which extends through the first chamber, and a second piston rod, which extends through the second chamber.

A door hinge with a damping function which is implemented according to the flow of oil when opening and closing a door so that a buffering force is applied during opening of the door, closing of the door is carried out smoothly. Due to rapid return of a damper unit, the damper unit immediately operates even when the door is closed immediately after being opened, thereby enabling smooth opening and closing of the door.

A door component has a controllable damping device containing a magnetorheological fluid as a working fluid. Two connection units can move relative to one another. One of the two connection units can be connected to a support structure and the other of the two connection units can be connected to a moveable door unit of a vehicle in order to damp a movement of the door unit between a closed position and an open position under control of a control device. The damping device has an electrically adjustable magnetorheological damping valve which is current-less in its adjusted state. A damping property of the damping device is continuously adjusted as needed via an electrical adjustment of the damping valve.

To provide the original cover closer which can control a rotation torque accompanied with an opening and closing operation of in a simple structure, as compared to the conventional original cover closer, solution is made in that the original cover closer comprises an attaching part attached to the main body side; a supporting part, wherein its side plates are rotatably attached to the both side plates of the attaching plate via a hinge shaft, as well as the original cover is attached to the supporting part; a pressure receiving part provided between the both side plates of the attaching part; a cam slider slidably provided inside the supporting part by making its cam portion abut against the pressure receiving part; an elastic module resiliently provided between the cam slider and a free end side of said supporting part, so as to bring the cam slider into press contact with the pressure receiving part and to rotatably urge the supporting part in an opening direction of an original cover; and a brake module provided between the supporting part and the cam slider, and that the brake module consists of a plurality of friction protruding ridge portions provided on an inner wall surface of the supporting part toward the cam slider, and at least a gently-sloping upward inclined portion gradually climbing from the cam slider side is provided on each of the friction protruding ridge portions.

A hinge assembly includes a toggle type hinge mechanism (10) with a linear damper (13) arranged with its longitudinal axis parallel to the axis of movement of the hinge mechanism. First and second wings (19, 30) operate the damper. First and second striker plates and an arm assembly (20, 32, 55) activate the first and second wings in response to movement of the hinge mechanism.

A door closer is provided. The door closer includes a first connecting plate and a second connecting plate. The first connecting plate is connectable to an external door frame, the second connecting plate is connectable to a door body connecting portion. Connecting rod assemblies and return springs are mounted in the door body connecting portion. One end of the connecting rod assembly passes through the second connecting plate and is hinged to the first connecting plate. When a door is opened, an external door body drives the first connecting plate and the second connecting plate to overturn, and after the connecting rod assembly pulls the door body connecting portion, the return spring is compressed. When the door is closed, the return spring pulls the door body to close automatically.

A lever pushes a latch drawn into a hook accommodating space in a latch holder in a direction where a door opens is installed in the latch holder, and the latch is released from the latch holder using the lever. The door that is opened by an initial opening angle by the latch holder releasing the latch automatically opens by self-weight of the door.

An articulated hinge assembly for connecting a door to a fuselage of an aircraft includes an articulated hinge arm having a first hinge member pivotably coupled to a second hinge member at an elbow. A fuselage fitting is pivotably coupled to a fuselage bracket and a door fitting is pivotably coupled to a door bracket of the door. The articulated hinge arm is movable from a collapsed position to an expanded position to move the door from a door closed position to a door open position. The articulated hinge assembly includes a linkage assembly coupled to the articulated hinge arm, the fuselage fitting and the door fitting controlling movement of the first hinge member and the second hinge member relative to each other and relative to the fuselage fitting. The linkage assembly controls positioning of the door.