Abstract: A flap drive for a flap includes two identical lever joint arrangements which are arranged in pairs at a distance from one another. The flap can be moved out of its closing position into its opening position and back by the flap drive. In this case, the lever joint arrangements are articulated pivotably with one of their ends in each case on a side region of the flap and with their other ends at a fixed location on the motor vehicle. The mutually corresponding pivot axes of the articulation points extend coaxially to one another. Movement transmission devices for the pivotable drive of a driven lever of each lever joint arrangement are guided by a common motive drive unit, the driven levers being articulated at a fixed location on the motor vehicle.

Abstract: A gas spring has a closed cylinder, the interior of which is divided into a first working space and a second working space by a piston, which is free to slide back and forth in the cylinder. The piston has a piston rod, which extends through the second working space and out from the cylinder through a seal. The first working space and the second working space are filled with pressurized gas. A compensating space, which is filled with a compensating medium, is also provided. The volume of this compensating medium changes with the temperature, and this change in volume brings about a corresponding change in the volume of the first working space. The compensating medium is an incompressible medium which expands in volume as the temperature drops, this expansion leading to a decrease in the volume of the first working space.

Abstract: An adjusting device for adjusting two parts relative to one another, has a fixed, sleeve-like housing and an adjusting component which is arranged in the housing and is led with its one end region out of a front-end opening of the sleeve-like housing. By means of a rotary drive, the adjusting component can be adjusted axially relative to the sleeve-like housing by means of a planetary roller mechanism. The sleeve-like housing is arranged in a rotationally locked manner and is provided with a thread on its cylindrical inner wall. The rotary drive is arranged on the likewise rotationally locked adjusting component, this rotary drive having a drive shaft which is coaxial to the sleeve-like housing and by means of which a roller cage can be driven in a rotatable manner about the longitudinal axis of the sleeve-like housing.

Abstract: A push-type gas spring has a pressure tube having a pressure tube connector element for the external attachment of the push-type gas spring. The gas spring also has a piston, which is operable to slide back and forth axially in the pressure tube and has a piston rod, where the piston rod extends out of the pressure tube from a first end surface of the pressure tube and has a piston rod connector element for the external attachment of the push-type gas spring. So that tensile forces can be applied to the pressure tube connector element and the piston rod connector element, the pressure tube and the pressure tube connector element are connected to each other by a pressure tube tension element extending axially alongside the piston rod and/or the piston rod and the piston rod connector element are connected to each other by a piston rod tension element extending axially alongside the pressure tube.

Abstract: A piston is guided in an axially displaceable manner sealed off from a closed cylinder via an annular seal radially surrounding it, and divides the cylinder interior into a working space near the piston rod and a working space away from the piston rod. The two working spaces are filled with a hydraulic fluid. The piston has a one-sided piston rod which extends through the working space near the piston rod and is guided in a sealed manner to the outside through an end closing wall of the cylinder. A first valve can be opened under high pressure to connect the working space away from the piston rod to the working space near the piston rod. A second valve can be opened under high pressure to connect the working space near the piston rod to the working space away from the piston rod. A volume-equalizing chamber for receiving the amount displaced from the working space away from the piston rod, which is greater than the amount displaced from the working space near the piston rod.

Abstract: A piston/cylinder unit has a closed cylinder with a piston axially displaceably guided therein. The piston divides the cylinder interior into first and a second working spaces which are both filled with a fluid. A first nonreturn valve is arranged in the piston having a closing element of which is force-loaded in the closing direction. At least a portion of the first nonreturn valve is exposed to pressure in the first working space. A second nonreturn valve is also arranged in the piston and also has a closing element of which is force-loaded in the closing direction. The surface of the closing element of the first and/or second nonreturn valve acted upon by the pressure of the respective working spaces can be enlarged during the opening stroke of said nonreturn valve.

Abstract: The invention relates to a continuously lockable adjusting device 1, consisting of a fluid-filled cylindrical housing 2, of a piston 4 which is axially movable in the housing 2 and which subdivides the housing 2 into two pressure chambers 5, 6 and is connected to a piston rod 3 which, sealed off at one end, penetrates the housing 2. A locking valve 7 has a closing member 13 and a manually actuable trigger tappet 8 together with a transmission disc 16, a tilting movement of the trigger tappet 8 causing the closing member 13 to be capable of being acted upon axially movably by the transmission disc 16 and causing the locking valve 7 to be capable of opening so as to connect the pressure chambers 5, 6 to one another. The transmission disc 16 of the trigger tappet 8 is in bearing contact on the closing member 13 axially in a play-free manner, and the trigger tappet 8 is fixed axially in this position with respect to the closing member 13.

Abstract: An actuating device includes a base part and a part which can be moved and is coupled to the base part in a manner such that it can pivot about a pivot axis. A driving device has a cable which can be wound up on a cable drum to drive the movement of the part which can be moved. The driving device has a pull/push rod which is coupled by its one end to the part which can be moved at a distance from the pivot axis and is guided movably by its second end along a guide path, which extends approximately at right angles to the pivot axis, on the base part. In this case, the second end of the pull/push rod can be pulled by a first cable to a first end of the guide path and by a second cable to a second end of the guide path.

Abstract: A cylinder has an interior space which contains a medium under pressure. A piston is displaceably arranged in the cylinder and has a piston rod which projects from the cylinder at one end of the cylinder. The piston rod is enclosed by an annular seal having an inner radially encircling circumference which bears against the piston rod and an outer radially encircling circumference which bears against the inner wall of the cylinder, a side facing the interior space to which the pressure of the medium is applied, and a side remote from the interior space supported on a supporting element. The supporting element, in turn, is supported on part of the cylinder. The supporting element includes a safety element which is designed to shorten its axial length during thermal overloading, as a result of which a passage opens from the interior space of the cylinder to the environment. The safety element is made of a melting or subliming material.

Abstract: A column unit includes a fixed upright tube with a bottom upright-tube end and a top upright-tube end and a telescopic tube axially displaceably guided in the upright tube. A cylinder of a pneumatic spring is axially displaceably guided in the telescopic tube. A piston rod projecting out of the cylinder of the pneumatic spring has a free end fastened on the upright tube proximate the bottom upright-tube end. A carry-along stop of the cylinder of the pneumatic spring allows the telescopic tube to be carried along out of the upright tube when the pneumatic spring is moved axially. A securing element limits an axial movement of the telescopic tube out of the upright tube. The securing element is arranged on the upright tube and abuts the outer cylindrical lateral surface of the telescopic tube with radially inwardly directed resilient prestressing.

Abstract: In a piston-cylinder assembly comprising a cylinder in which a piston rod is installed with freedom of axial movement and which is filled with a blocking medium, a braking device becomes active when the piston-cylinder assembly moves faster than a defined speed and thus limits the speed to a desired extent. A valve body divides the cylinder into two working spaces, which are connected to each other by at least one flow-through opening. As soon as the defined speed is exceeded, the dynamic pressure in the working space elastically deforms a disk, which has the effect of at least partially sealing off the flow-through opening(s) in opposition to the forces trying to keep them open. The elastic deformation of the disk represents a closing movement relative to the cross section of the flow-through opening(s). The disk takes the form of a valve ring, which is installed in a valve ring groove with a certain freedom of axial movement.

Abstract: A catch for two objects moveable in relation to one another, in particular a door catch, includes a cylinder, which is operatively connected to a first object, a friction surface carrier, which is operatively connected to a second object, a friction element for creating a frictional grip between the cylinder and the friction surface carrier through an energy input. The friction element being connected to an electrical voltage supply device, wherein a change in the volume of the friction element, which constitutes an actuating movement of the friction element in relation to the friction surface, occurs as a function of the voltage applied to the friction element.

Abstract: A piston rod is guided in an axially movable manner within a cylinder filled with a damping medium, and a piston is arranged on the piston rod, which piston divides the cylinder into a working space on the piston-rod side and a working space remote from the piston rod. The two working spaces are connected to each other by at least one flow passage which is activated as a function of the axial position of a valve body, which is prestressed in the opening direction by a spring, the valve body being movable onto a valve seat surface into the closed position as a function of dynamic pressure and at least reducing the passage cross section of the at least one flow passage. The piston has a valve seat surface on which the valve body comes to bear with a conical closing surface in the maximally closed position.

Abstract: An adjusting device includes a piston cylinder unit with a cylinder having a piston and a piston rod movably arranged therein, the piston rod extending out of the cylinder. A piston rod guide includes a support element having a first part arranged in the cylinder and bearing axially against one part of the cylinder and a second part connected to the first part. An annular seal arranged between the second part of the support element and the interior of the cylinder such that pressure in the cylinder acts on the seal which bears on the second part of the support element. The connection between the first and second parts of the support element is releasable when the force of the annular seal bearing on the support element exceeds a bearing force limit. The first and second parts of the support elements move telescopically from a normal position to an overload position when the connection is released and reduce the axial length of the support element.

Abstract: A piston/cylinder unit having a selectively inhibited movement includes a cylinder filled with a hydraulic medium and a piston arranged on a piston rod and dividing the cylinder into working spaces. A flow connection system having a flow connection is arranged between the first and second working spaces. The flow connection system includes an on-off valve having a movable valve element which opens the flow connection as a function of a position of the movable valve element. The flow connection system further includes a load-dependent valve arranged in series with the on-off valve for inhibiting complete flow through the flow connection independently from the on-off valve when a load on the piston/cylinder unit is lower than an inhibiting load.

Abstract: A furniture pillar includes an upright tube and a guide bushing which is inserted into one end of the upright tube and has an inner circumferential surface which is a guide for a supporting tube of the furniture pillar. The guide bushing has a radially inner guide tube, the tube passage of which forms a guide. An annular insertion region extends radially outwards on an end region of the guide tube and is inserted with its outer circumferential surface into the upright tube. A plurality of circumferentially spaced ribs of the guide bushing adjoin the annular insertion region axially, and extend radially outwards from the guide tube to outer end surfaces which bear against the inner wall of the upright tube, forming open chambers between them towards the side facing away from the annular insertion region. The upright tube has a color coating which completely covers its outer circumferential surface. Continuous openings pass from the chambers through the guide tube to the interior of the guide tube.

Abstract: Closing device, in particular for a body part on a motor vehicle, the body part being mounted pivotably on a base part, includes a spring element having a piston rod which is axially moveable within a cylinder to exert a closing force on the body part via a cable device, which engages on the body part. The spring element has, on its piston rod, a deflection pulley over which the cable device is guided, the end of the cable device being fixed with respect to the cylinder.

Abstract: The invention relates to a continuously lockable adjusting device 1, consisting of a fluid-filled cylindrical housing 2, of a piston 4 which is axially movable in the housing 2 and which subdivides the housing 2 into two pressure chambers 5, 6 and is connected to a piston rod 3 which, sealed off at one end, penetrates the housing 2. A locking valve 7 has a closing member 13 and a manually actuable trigger tappet 8 together with a transmission disc 16, a tilting movement of the trigger tappet 8 causing the closing member 13 to be capable of being acted upon axially movably by the transmission disc 16 and causing the locking valve 7 to be capable of opening so as to connect the pressure chambers 5, 6 to one another. The transmission disc 16 of the trigger tappet 8 is in bearing contact on the closing member 13 axially in a play-free manner, and the trigger tappet 8 is fixed axially in this position with respect to the closing member 13.

Abstract: A piston/cylinder unit has a closed cylinder with a piston axially displaceably guided therein. The piston divides the cylinder interior into first and a second working spaces which are both filled with a fluid. A piston rod extends through the cylinder interior and is guided on its end side to the outside in a sealed manner through a closing wall of the cylinder. Furthermore, a first nonreturn valve is arranged in the piston having a closing element of which is force-loaded in the closing direction. At least a portion of the first nonreturn valve is exposed to pressure in the first working space. When an opening pressure in the first working space exceeds an opening pressure, the first nonreturn valve is opened connecting the first working space to the second working space. A second nonreturn valve is also arranged in the piston and also has a closing element of which is force-loaded in the closing direction.

Abstract: A column unit includes a fixed upright tube with a bottom upright-tube end and a top upright-tube end and a telescopic tube axially displaceably guided in the upright tube. A cylinder of a pneumatic spring is axially displaceably guided in the telescopic tube. A piston rod projecting out of the cylinder of the pneumatic spring has a free end fastened on the upright tube proximate the bottom upright-tube end. A carry-along stop of the cylinder of the pneumatic spring allows the telescopic tube to be carried along out of the upright tube when the pneumatic spring is moved axially. A securing element limits an axial movement of the telescopic tube out of the upright tube. The securing element is arranged on the upright tube and abuts the outer cylindrical lateral surface of the telescopic tube with radially inwardly directed resilient prestressing.