Abstract: A torsional vibration damper with at least two parts that are rotatable about an axis and can turn relative to each other against the opposition of at least one coil spring. Support shoes are provided between the spring and an outer wall of the damper structure and are arranged to slide along the outer wall with the spring as it undergoes compression and relaxation. The support shoes include roller bodies to reduce sliding friction between the support shoes and the outer wall.

Abstract: A torsional vibration damper is described having at least two parts rotatable around an axis of rotation, which are pivotable toward one another against the effect of at least one energy accumulator, the parts pivotable toward one another having regions using which the energy accumulator, which acts around the circumference of the torsional vibration damper, is compressible, the energy accumulator having at least one spring held in a carrier.

Abstract: A torsional vibration damper, particularly for use in the power train of a motor vehicle, employs one or more preferably arcuate coil springs having constant inner radii and one or more sets of neighboring smaller-diameter convolutions next to one or more sets of neighboring larger-diameter convolutions. The coil spring or springs is or are compressible by the retainers of two components which can turn, about a common axis, with and relative to each other and at least one of which defines a chamber for the coil spring(s). The retainers of the components can act upon the adjacent end convolutions of the coil spring or of two or more series-arranged coil springs between them by way of plastic slide elements and/or elastic bumpers.

Abstract: A torsional vibration damper with at least two components that are rotatable relative to each other against the opposition of at least two deformable energy storing elements, such as arcuate coil springs. In order to at least reduce the noise that is generated by the damper, the energy storing elements are connected to each other by at least one coupling device that is designed to ensure that, when one of the energy storing elements is deformed, there results a controlled entrainment of the other energy storing element or elements.

Abstract: A flywheel, especially for a dual-mass flywheel, having a friction surface and a mounting surface that is able to mate with a flange. It is distinguished by at least one buffer for the buffering of the friction surface and the mounting surface.

Abstract: A torsional vibration damper is described having at least two parts rotatable around an axis of rotation, which are pivotable toward one another against the effect of at least one energy accumulator, the parts pivotable toward one another having regions using which the energy accumulator, which acts around the circumference of the torsional vibration damper, is compressible, the energy accumulator having at least one spring held in a carrier.

Abstract: The coaxial first and second flywheels of a torsional vibration damper, e.g., in the power train of a motor vehicle, are rotatable relative to each other against the opposition of one or more arcuate coil springs which is or are confined in an annular chamber defined by at least one of the flywheels. One end of the coil spring or each coil spring bears, directly, or indirectly, against a single retainer or against one of several discrete retainers on one of the flywheels, and the other end of the coil spring or each coil spring bears, directly or indirectly, against a single retainer or against one of several discrete retainers of the other flywheel. At least one slide is interposed between the radially outermost portions of discrete convolutions provided between an internal surface of the at least one flywheel and one or more discrete coil springs, one for each slide.

Abstract: A torsional vibration damping apparatus which operates between the crankshaft of the engine and the input shaft of the transmission in a motor vehicle has two flywheels which are rotatable relative to each other against the opposition of one or more dampers installed in a fluid-containing chamber of the flywheel which is connected to the crankshaft. The chamber has one or two annular compartments for the coil springs of the damper or dampers, and such coil springs are precurved over their longitudinal extension. Each precurved spring has a center of curvature and includes neighboring convolutions each having a first portion nearer to and a second portion more distant from the center of curvature of the respective spring.

Abstract: Apparatus for damping vibrations between the output element of the engine and the power train in a motor vehicle has flywheels which are rotatable relative to each other. One flywheel is mounted on the output element of the engine and the other flywheel is connectable to the power train by a friction clutch. Vibration dampers are installed between the flywheels, and such dampers are confined in a housing which is provided on the one flywheel and contains a supply of viscous fluid medium for the parts of the dampers. The housing is the input element of the dampers and the output member of the dampers is a flange which extends into the housing and is axially movably coupled to the other flywheel. The flywheels rotate with respect to one another and the dampers contain resilient elements which selectively oppose rotation of the flywheels during various stages of rotation. The resilient elements are also arranged not to oppose rotation of the flywheels during an initial stage.

Abstract: Apparatus for transmission of torque in the power train of a motor vehicle has coaxial rotary first and second torque transmitting devices, each of which can constitute a simple or a composite flywheel, and a torsional vibration damper operating between the two devices. The damper is installed in an annular chamber which is sealed at its periphery and is flanked by two sidewalls of the first torque transmitting device. The damper includes a washer-like partition which is affixed to the second torque transmitting device and has arms extending radially outwardly into the chamber. The radially inner part of the annular chamber is sealed by annular seals having annular carriers borne by the sidewalls at opposite sides of the partition, and deformable annular lips secured to the carriers and bearing upon the respective sides of the partition. The carriers and the lips consist of different materials and the seals serve to prevent penetration of impurities into and/or the escape of lubricant from the chamber.

Abstract: Apparatus for damping torsional vibrations, particularly in the power train of a motor vehicle, has first and second torque transmitting devices rotatable with and relative to each other about a common axis against the opposition of a damper having springs confined in an annular chamber of one of the two devices. The extent to which the two devices can turn relative to each other is determined, at least in part, by plastic inserts which are installed in the one device radially inwardly of the chamber and have anvils which abut each other upon completion of a preselected angular displacement of the two devices relative to each other from a neutral position.

Abstract: Apparatus for damping vibrations between the output element of the engine and the power train in a motor vehicle has flywheels which are rotatable relative to each other. One flywheel is mounted on the output element of the engine and another flywheel is connectable to the power train by a friction clutch. Vibration dampers are installed between the flywheels, and such dampers are confined in a housing which is provided on the one flywheel and contains a supply of viscous fluid lubricating medium for the parts of the dampers. The housing is the input member of the dampers, and the output member of the dampers is a flange which extends into the housing and is axially movably coupled to the other flywheel.

Abstract: Apparatus for damping torsional vibrations in the power train of a motor vehicle has two coaxial flywheels one of which is driven by the engine and the other of which can transmit torque to the input shaft of a transmission by way of a friction clutch. The flywheels are rotatable relative to each other against the resistance of a damper. Certain features of the apparatus reside in the dimensioning and distribution of its parts in the radial and axial directions of the flywheels to reduce the dimensions of the apparatus. The torque transmitting connection between at least one pair of neighboring rotary parts of the apparatus employs a slip clutch which yields when the applied torque exceeds a certain value. An intermittently or continuously active hysteresis device is utilized to operate in parallel with the energy storing springs of the damper.

Abstract: The centering unit for the primary and secondary flywheels of a torsional vibration damping apparatus for use in the power train of a motor vehicle employs a radial bearing with a sleeve which is or can be a press fit on or in one of the flywheels, and the still accessible internal or external surface of the sleeve is calibrated simultaneously with or following the press fit. The calibrated surface of the sleeve is thereupon inserted into a socket or receives an extension of the other flywheel. The centering unit further utilizes an axial bearing wherein the function of the sleeve in the radial bearing is performed by an annular collar which can extend radially inwardly or radially outwardly of the sleeve. One of the bearings can be installed radially inwardly of the fasteners which secure the primary flywheel to the output shaft of the engine, and the other bearing can be installed radially outwardly of such fasteners.

Abstract: A torsional vibration damper for use in a motor vehicle power train has an input disc part connected to the vehicle engine and an output disc part to the downstream side of the power train. The disc parts are rotatable relative to each other against the action of an energy accumulator such as a coiled compression spring. The energy accumulator is seated in a suspension device that is divided into two socket parts. The socket parts are rotatable in relation to each other as well as in relation to the input and output disc parts.

Abstract: The invention relates to a device for transmitting torque, more particularly from an internal combustion engine to a transmission on the output side in a motor vehicle, and to a method for assembling and dismantling as well as maintaining this device.

Abstract: A selected portion of a surface of a metallic workpiece such as the end surface of a tubular workpiece, is provided with one or more recesses by resorting to a tool having a preferably pointed tip and being driven into the surface to displace the material of the workpiece substantially transversely of the thus obtained recess. The latter can be used to facilitate the establishment of a separable connection between the workpiece and a substantially disc-shaped section of a cover or housing in a friction clutch for use in motor vehicles. The tool can be left in the recess to serve as a locating or centering device for the workpiece.

Abstract: A torque transmitting apparatus which can be used in the power train between the prime mover and the transmission of a motor vehicle has a first flywheel connectable to the prime mover, a second flywheel coaxial with and receiving torque from the first flywheel by way of a damper, and a friction clutch which can be engaged to transmit torque between the second flywheel and the input element of the transmission. The energy storing elements of the damper and the bearing between the two flywheels are installed radially inwardly of the friction surfaces of the second flywheel and the axially movable pressure plate of the friction clutch. This renders it possible to reduce at least the radial dimensions of the apparatus without reducing the diameters of the friction surfaces.

Abstract: Apparatus for damping torsional vibrations in the power train of a motor vehicle has two coaxial flywheels one of which is driven by the engine and the other of which can transmit torque to the input shaft of a transmission by way of a friction clutch. The flywheels are rotatable relative to each other against the resistance of a damper. Certain features of the apparatus reside in the dimensioning and distribution of its parts in the radial and axial directions of the flywheels to reduce the dimensions of the apparatus. The torque transmitting connection between at least one pair of neighboring rotary parts of the apparatus employs a slip clutch which yields when the applied torque exceeds a certain value. An intermittently or continuously active hysteresis device is utilized to operate in parallel with the energy storing springs of the damper.

Abstract: An apparatus for damping torsional vibrations between the engine and the power train in a motor vehicle has flywheels which are rotatable relative to each other. One flywheel is mounted on the output element of the engine and another flywheel is connectable to the power train by a friction clutch. Installed between the flywheels are at least two resilient dampers operating in parallel. In a first stage of relative rotation between the flywheels from a starting position, only one of the dampers is active to oppose the rotation. In a next-following second stage of relative rotation the other of the two dampers becomes active to oppose the rotation in parallel with the first damper.