Abstract: An operation device for a friction clutch arranged in the drive train of a motor vehicle. The operation device includes a positioning servo arrangement with a pneumatic power cylinder arrangement. The pneumatic power cylinder arrangement acts on a clutch release sleeve arrangement. The positioning servo arrangement can be operated with a control valve that is connected to a pneumatic source depending on a command variable representing a desired position and an actual variable representing the axial position of the clutch release sleeve arrangement. The pneumatic power cylinder arrangement is arranged inside of the bell-shaped housing and the control valve is arranged outside of the bell-shaped housing or the bell-shaped housing is arranged at least partially inside of the bell-shaped housing, but is accessible from the outside and/or can be removed when the bell-shaped housing is attached to the combustion engine.

Abstract: A seal element, in particular an elastomer gasket for use in hydraulic annular cylinders, such as in clutches, with a radially outer and a radially inner seal lip, characterized by the fact that the seal lips are axially offset in relation to one another.

Abstract: A piston-cylinder unit includes a cylinder in which a piston rod is located so that the piston rod can move axially. A first connection mechanism is connected to the cylinder, and a second connection mechanism is connected to the piston rod. A positioning cylinder, with a pressure medium connection, is effectively connected to one of the first and second connection mechanisms. The distance between the first and second connection mechanisms can be set by the addition or discharge of pressure medium to or from the positioning cylinder. The positioning cylinder is located in series with the cylinder, and the piston rod forms a guide path or track for the positioning cylinder.

Abstract: A twist-grip shifter for bicycles having a twist grip, which twist grip includes an outer grip part and an inner twist part. The twist grip has an area with a small diameter, a transitional area, and an area with a large diameter, and the twist grip can be positively and detachably connected to a twist grip shifter in the axial direction. The twist grip can have an elastic rubber grip part and a non-elastic rotary part, and can have a surface structure with root-like, sharp ribs on the external surface of the grip part. The surface structure on the grip part has the advantage that the fins or peaks extend axially along the surface lines, and fit into the bends underneath the joints of the index finger, to essentially guarantee the optimum transmission of torque from the hand of the rider to the twist grip.

Abstract: A damping valve for a vibration damper including a cylinder filled with damping medium. A piston rod with a piston is realized in the cylinder so that the piston rod can move axially and the piston can divide the cylinder into two working chambers. The damping valve is located inside a housing and is realized so that it can be adjusted by a solenoid in connection with an armature, which armature is guided in an insulator. A receptacle functions as part of the housing, which receptacle, by an insulator, separates the hydraulic part of the damping valve from the electrical part. A tube socket together with the housing holds the adjustable damping valve. As the insulator, at least one gasket or seal is used, which provides hydraulic and magnetic insulation between a cover of the housing and the receptacle.

Abstract: A disengaging mechanism for a friction clutch which is arranged in a motor vehicle between an internal combustion engine and a transmission flanged to the internal combustion engine by a casing. The disengaging mechanism includes a guide pipe which is fastenable in the casing. A release bearing element is guided radially at the outer circumference of the guide pipe so as to be axially movable. The disengaging mechanism also includes a clutch lever which is to be articulated at the casing for transmitting clutch actuating forces. At least the guide pipe and the clutch lever are held together to form a constructional unit prior to installation in the motor vehicle. In the operation-ready state, the movement limiting components influence the movability of the disengaging mechanism. Assembly is facilitated by constructing the disengaging mechanism as a constructional unit, which can also contain the release bearing element.

Abstract: A system to control a chassis vibration damping device with a variable damping characteristic in a vehicle with the use of a single acceleration sensor and a subsequent processing of the signal by means of filters and of an additional signal of a primary detector, whereby the processing corresponds to a breakdown of the acceleration signal into its individual components which relate to the longitudinal, transverse and vertical axes of the vehicle.

Abstract: A two part flywheel having a torsional vibration damper with a plurality of inertial masses, for installation in the drive train of a motor vehicle. The torsional vibration damper has three inertial mass systems. A first and a second inertial mass system are oriented so that they can rotate jointly and also relative to one another around a common first axis of rotation. The first inertial mass system and the second inertial mass system are connected rotationally elastically to one another by means of a spring system. A third inertial mass system which is movable relative to the first and the second inertial mass systems is rotationally connected by a transmission system to the first and/or second inertial mass systems. One of the inertial mass systems, in particular the first inertial mass system, is designed to be connected to the crankshaft of an internal combustion engine.

Abstract: A damping valve, in particular for a vibration damper, including a cylinder filled with damping medium in which a piston rod with a piston is housed. The piston rod can move axially and the piston divides the cylinder into two working chambers. The damping valve can be adjusted by means of a magnet coil in connection with an armature and has an emergency operating setting. A stop is provided for the valve position for the emergency operating setting. The position of the stop relative to the armature can be used to define a passage cross section for the emergency operating setting.

Abstract: Disclosed is a vibration damper with an adjustable damping force and a method of producing the same. The adjustable vibration damper has a container tube to which is connected a shut-off valve arrangement. A damping medium is fed to the shut-off valve arrangement via a high-pressure partial length, an intermediate tube, if required, which is arranged inside the container tube, wherein the container tube and/or the intermediate tube with a cylinder in which a piston slides axially at a piston rod form the high-pressure partial length, and the container tube and/or the cylinder tube has a tube connection piece as a transition of the high-pressure partial length to the shut-off valve arrangement. The tube connection piece in at least one of the tubes forming the transition is constructed as a separate structural component part having a flange which contacts the inner region of the tube and projects through an opening in the tube.

Abstract: A torsional vibration damper, for installation in the clutch disc of a motor vehicle friction clutch, the damping spring system of which torsional vibration damper comprises at least three spring stages which are sized for different torque ranges of the torque to be transmitted between an input component and an output component. The spring stages are graduated so that they are active in corresponding ranges of the relative angle of rotation between the input component and the output component. The torsional vibration damper comprises a pre-damper which is sized for operation at idle, a low-speed damper which is sized for travel at slow speeds, and a load damper which is sized for load operation. The spring stage of the low-speed damper has an initial torque which is lower than the final torque of the pre-damper, and the load damper also has an initial torque which is lower than the final torque of the low-speed damper.

Abstract: This invention relates to a seal between two components which two components can move relative to one another. The seal can be used in particular for hydraulic, pneumatic or hydropneumatic systems, whereby at least one elastic seal element interacts with a running surface. Preferably, this seal is used between a piston-shaped part and a cylinder-shaped part. In any case, the running surface, which running surface is mobile relative to the gasket, is provided with depressions. The depressions in the running surface, which running surface interacts with the gasket, form a cross-hatched pattern.

Abstract: A self-pumping hydropneumatic strut with an internal level control, especially for automobiles, has a power cylinder. The power cylinder is under the pressure of at least one gas pad acting as a spring. The gas pad is placed in a high-pressure chamber, which high-pressure chamber is filled with damping agents. The power cylinder is divided into two working chambers by a working piston. The working piston is carried by a hollow piston rod and is equipped with valves. A piston pump is driven by the spring motion and transports oil from a low-pressure chamber into the working chamber. The working chamber is connected to the high-pressure chamber. The piston pump includes a pump chamber formed by the hollow piston rod and a pump rod that is connected to the power cylinder. The damping agent in the pump chamber can be pressure-impacted by a driving element.

Abstract: A torsional vibration damper is provided with a transmission element on the driving side, at least one planet carrier which is provided with at least one bearing for receiving a planet gear engaging with at least one ring gear, and a transmission element on the driven side. One of the transmission elements has a controller for elastic elements of a damping arrangement. At least one lubricant feed is associated with the planet gear. The lubricant feed extends, at least along part of its extent, within the range of extension of the planet gear and opens out in the region of the bearing. Lubricant can flow through this lubricant feed due to the pumping action of the planet gear as it rotates relative to other elements of the planetary gear unit.

Abstract: A piston-cylinder aggregate comprising a cylinder in which an axially movable piston rod is arranged is provided. The piston rod has two pistons, which are separated from each other and which produce a damping force of a variable magnitude depending on the piston rod's stroke position. The piston-cylinder aggregate has a bypass area defined in its inner wall along a portion of the length of the cylinder, so that the damping force is at least reduced in the stroke area of the bypass, and the two pistons have a separation equal to or less than the length of the bypass, such that depending on the position of the piston rod, a damping force of variable magnitude is produced. For example, when both pistons are disposed within a section of the cylinder defined by the bypass area, the dampening force exerted by the piston rod is minimized, while when both pistons are outside the bypass area, the dampening force in both stroke directions is maximized.

Abstract: A slave cylinder for the operation of a friction clutch, especially in motor vehicles, with a housing, an inner portion, an annular or cylindrical piston which annular piston is positioned between the housing and the inner portion, a clutch release sleeve or clutch throwout sleeve or coupling socket joint which clutch release sleeve is in contact with the annular piston and can be axially displaced with respect to the housing, as well as a spring or pressure spring or compression spring which is supported by both the clutch release sleeve and the housing, and radial shoulders or steps or reliefs provided at the clutch release sleeve and at the housing to secure against torsion. The pressure spring may be characterized as a sinuous spring or zig-zag or no-sag spring. The ends of the pressure spring are positioned to make contact at the ends of the shoulders which shoulders act in the opposite direction to secure against torsion.

Abstract: A cylinder for pressure media, in particular a hydraulic master or slave cylinder in motor vehicles, having a bleed element which can be screwed into an aperture in the cylinder casing and which bleed element is sealed against the casing. The bleed element is functionally connected in the vicinity of that end inserted in the casing to a round sealing element, which is pressed axially against a shoulder in the aperture.

Abstract: A hydrokinetic torque converter includes an impeller driven by an internal combustion engine, a turbine coupled to an output shaft, and a stator that can be blocked in one rotational direction, which together form a converter circuit filled with converter fluid, which is supplied from a supply container by a hydraulic supply system through supply lines and return lines, at least one of which is in flow connection with at least one opening, which is provided on a separating wall located between the turbine hub and the associated casing cover of the converter housing and connects that line to a chamber defined by the casing cover and an adjacent converter element. The separating wall is integrally constructed with the casing cover and preferably acts in the radial extension area of the turbine hub as an axial support for supporting the turbine hub against axial movements.

Abstract: A torsional vibration damper for a flywheel with two inertial masses has two rotating elements which can rotate together and relative to one another. The rotating elements are connected to one another with rotational elasticity by a spring. The spring is located in a channel which is formed on the outside periphery of one of the two rotating elements. The channel is filled at least partly with lubricant. A filling passage for the lubricant is contained in one of the two rotating elements in the vicinity of the hub. The filling passage is closed by the annular surface of a component which, at least in the operationally fully assembled condition, is in contact with one of the two rotating elements and/or the hub. It is thereby possible to eliminate a separate closing cap, along with the corresponding work step which is necessary for the installation of such a closing cap.

Abstract: A pressure plate subassembly for a motor vehicle friction clutch, which subassembly comprises an application plate or pressure plate which, when assembled in a motor vehicle friction clutch, is connected to a flywheel to rotate jointly around an axis and can be axially displaced with respect to the flywheel. The pressure plate has a friction surface which faces the flywheel, and at least one clearance sensor is provided on the pressure plate. The clearance sensor has an operation lever segment that cooperates with a wear adjustment device, and an axial stop segment which cooperates with the flywheel. The pressure plate subassembly comprises the displacement contrivances, which displacement contrivances prevent a displacement of the clearance sensor, of which there is at least one, with respect to the pressure plate prior to the assembly of the pressure plate subassembly to the flywheel.