Abstract: A torsional vibration damper for a piston-equipped bridging clutch of a hydrodynamic clutch device includes a drive-side transmitting element for at least one damping unit, which is in working connection by way of a transmitting element on the power takeoff-side with a power takeoff component assigned to it, where at least one angle of rotation limiter is assigned to the damping unit. At least one projection is provided on one of the transmitting elements, this projection extending toward the other transmitting element and engaging in an assigned recess in the other transmitting element with predetermined play in the axial direction to form an angle of rotation limiter, where the recess is provided with an appropriate circumferential dimension for the projection to ensure the possibility of a predetermined relative deflection between the two transmitting elements.

Abstract: A dual spring includes a pair of conically-shaped spring sections, which are joined at a common fulcrum. One of the spring sections is disposed radially inward from the fulcrum and the other of the spring sections is disposed radially outward from the fulcrum. Both of the conical sections open axially in the same direction relative to the fulcrum section.

Abstract: A hydrokinetic torque converter, particularly for use in the power train of a motor vehicle, has a housing which can receive torque from the prime mover of the vehicle and drives a pump adapted to rotate a turbine on the input shaft of the change-speed transmission. The turbine can also receive torque from the housing by way of a bypass clutch and a damper borne by a hub which is mounted on the input shaft. A feature of the invention resides in the simplicity of design and low cost of several component parts of the torque converter and in a novel mode of assembling the component parts.

Abstract: A clutch disk for a friction clutch includes a friction lining carrier and at least one friction lining element, which is connected to the friction lining carrier for rotation in common with it, and which can shift in the circumferential direction relative to this carrier against the pretensioning effect of a restoring arrangement. The disk also includes a friction device, which generates a frictional force acting in opposition to the displacement of the friction lining element relative to the friction lining carrier.

Abstract: A clutch assembly for starting a vehicle without using a torque converter has a simple structure yet providing high reliability. In the clutch assembly, a clutch and a damper device are housed in a housing connected to a crank shaft of an engine. A boss serving as an output member is connected to an input shaft of an automatic transmission. An output of the engine is connected/disconnected to/from the input shaft upon engagement/disengagement of the clutch. The clutch includes a friction member and a piston fit oil tightly with the housing so as to apply pressure to the friction member. One end of the damper device is connected to a clutch hub, and the other end is connected to the output member. The clutch and the damper device are aligned on the axis of the housing.

Abstract: A powertrain for transmitting torque between a power source and a transmission includes an output shaft driven by the power source, first and second input shafts, a housing, a first flywheel rotatably supported on the housing, a second flywheel rotatably supported on the output shaft and driveably connected to the first flywheel, a first clutch for driveably connecting and disconnecting the first flywheel and the first input shaft, and a second clutch for driveably connecting and disconnecting the second flywheel and the second input shaft.

Abstract: A torque converter which has a pump wheel, a turbine wheel, and a stator, which form a hydrodynamic circuit, and also a torsional vibration damper with a primary and a secondary damper element. The primary and the secondary damper element are connected to each other in a rotationally elastic manner by at least one set of springs. The turbine wheel has a turbine wheel shell and is supported rotatably with respect to a turbine wheel hub in a first bearing, which provides axial and radial support. The secondary damper element is mounted nonrotatably on the turbine wheel hub. The turbine wheel acts by way of an intermediate element on the primary damper element. The stator is mounted on a stator hub, which is supported by an axially operative second bearing on a turbine wheel base, which is connected to the turbine wheel shell. The first bearing is located radially outside the second bearing.

Abstract: A driven disk is disclosed that includes an inner hub and an outer hub secured to at least one cover plate. The driven disk includes a predamper having a driving element and a driven element. The driving element includes the cover plate and the driven element includes a predamper driven plate fixed to the inner hub. The cover plate includes a number of apertures and the predamper driven plate includes a number of sockets at least partially aligned with the apertures in the cover plate. An energy storage member is disposed within the apertures in the cover plate and the sockets in the predamper driven plate for absorbing torque as a function of relative rotation between the inner hub and the outer hub.

Abstract: A driving plate for a multi-plate clutch system includes a plurality of external teeth adapted to be matingly engaged within corresponding internal teeth of a housing of the clutch system. The external teeth are disposed substantially equidistantly along the circumference of the driving plate. At least one tooth of the external teeth is disposed offset in the circumferential direction from adjacent external teeth.

Abstract: A bridging clutch is installed in a fluid medium-filled housing of a hydrodynamic coupling device located between a drive shaft and a transmission input shaft, the coupling device also containing a pump wheel and a turbine wheel. The bridging clutch is provided with a piston, which, when moved into a first axial position, brings at least one friction element into working connection with at least one friction surface, and when moved into a second axial position, at least partially releases this working connection, and with a torsional vibration damper, which is designed with at least one drive element and with at least one takeoff element, at least one of which has openings for circumferential springs and actuating areas for these springs. At least one of the takeoff elements acts a carrier element for the turbine wheel, which is held otherwise without radial support in the housing.

Abstract: A torsional-vibration damper includes at least one primary element and a secondary element that can be coupled to each other by a spring device, are limited in movement in relation to each other about a rotational axis, and can be brought into frictional contact with each other by a friction device. The friction device has at least two friction-surface-carrying elements rubbing against each other to which a contact-pressure force, generated by a force-generating device, can be applied to produce a frictional engagement between the two elements. The force-generating device has a mechanical actuating mechanism for generating an actuating force and a hydraulic actuating mechanism for generating a counterforce, wherein the contact-pressure force is a vector sum of the actuating force and the counterforce.

Abstract: A hub ring for use in a clutch disk includes an inner circumference which can engage a hub; and a pair of axially opposed front sides. At least one of the front sides has means for positively engaging a structural component arranged against the respective front side so that torque can be transmitted from the structural component to the hub.

Abstract: A start-up clutch assembly (10) for translating torque between a prime mover and a transmission includes a drive member (16) and a clutch pack (30) is supported between the drive (16) and driven members (24). The clutch pack (30) is operable to move between a closed pack mode and an open pack mode to connect and disconnect the drive and driven members (16, 24) to selectively transfer and interrupt torque translation therebetween. A torque apply piston assembly (54) is operable to move between a disengaged position to connect and disconnect the drive and driven members and to provide a constant biasing force so that the clutch pack (30) normally operates in the closed pack mode to translate torque between the drive and driven members (16, 24).

Abstract: A driven disk in a clutch comprises a hub having a flange extending radially therefrom and having a spring cover affixed thereto. The spring cover defines at least one spring cavity therein and has two ends. Opposing first portions of the two ends define a first cavity length, and second opposing portions of the two ends define a second cavity length. A first spring is retained within the spring cavity wherein the first spring bears against the first end portions defining the first length. A second spring is also retained within the spring cavity wherein the second spring bears against the second end portions defining the second length.

Abstract: A damper mechanism is provided to suppress the enlargement of a prescribed angle in a damper mechanism. A clutch disk assembly 1 has an input rotary member 2, a spline hub 3, a damper section 4, a large friction mechanism 13, a friction suppressing mechanism, and an elastic member 104. The spline hub 3 is arranged to rotate relative to the input rotary member 2. The damper section 4 couples the input rotary member 2 and the spline hub 3 together rotationally. The large friction mechanism 13 can generate friction when the input rotary member 2 and the spline hub rotate relative to each other. The friction suppressing mechanism is a rotational gap ?ACp for preventing the large friction mechanism operating within a prescribed angular range. The elastic member 104 softens the impact between the members that touch against each other at the end of the prescribed angular range.

Abstract: A clutch disk assembly 1 has a pair of axially facing plates 12 and 13. A relatively rotatable flange 8 is provided between the plates 12 and 13. A first elastic member 30 exhibits high rigidity on the positive side of the torsional characteristics. A second elastic member 31 is provided to operate in parallel with first elastic member 30 to realize a low rigidity on the negative side of the torsional characteristics. The stop pins 22 affix plates 12 and 13 together. The stop pins 22 and notches 8c are provided on the outer periphery of the flange 8 constitute a stopper mechanism 86 for regulating the relative rotation between the plates 12 and 13 and the flange 8. The stopper mechanism 86 is located on radially outside the second elastic members 31. The stop pins 22 are movable on the outer periphery of the second elastic members 31.

Abstract: A hydraulic clutch has an impeller wheel, a turbine wheel with a turbine wheel shell, a turbine torsional vibration damper and a lockup clutch. The turbine wheel shell receives a connection element with which it acts on the torsional vibration damper. The lockup clutch has at least one clutch disk arranged at a disk carrier. The turbine wheel shell is connected on the radial inner side with the connection element. The disk carrier passes into a holding clamp which is connected to the turbine wheel shell in a radially eccentric manner. The disk carrier is connected with the connection element so as to be fixed with respect to rotation relative to it.

Abstract: A multi-clutch arrangement, especially a dual clutch for motor vehicles, comprising a first clutch area with a first pressure plate arrangement, with a first opposing support arrangement, and with a first clutch disk arrangement, which can be clamped between the first pressure plate arrangement and the first opposing support arrangement to transmit torque via the first clutch area; and a second clutch area with a second pressure plate arrangement, with a second opposing support arrangement, and with a second clutch disk arrangement, which can be clamped between the second pressure plate arrangement and the second opposing support arrangement to transmit torque via the second clutch area. A torsional vibration damper arrangement is assigned to at least one of the clutch areas, and where—relative to an axis of rotation (A)—the torsional vibration damper arrangement is arranged at least partially in the axial area of the first clutch area and/or of the second clutch area.

Abstract: A dry multiple-disk clutch for transmitting power from the crankshaft of a motorcycle to a transmission input shaft and cutting off power transmission includes an outer clutch member interlocked with the crankshaft so as to be driven for rotation, a plurality of driving friction disks interlocked with the outer clutch member, a plurality of driven friction disks alternated with the driving friction disks and interlocked with the transmission input shaft, and a pressure member disposed opposite to the outer clutch member with the driving and the driven friction disks arranged alternately between the outer clutch member and the pressure member, and capable of moving in opposite axial direction to compress the driving and the driven friction disks together and to disengage the driven friction disks from the driving friction disks.

Abstract: In a clutch device 1, a clutch cover assembly 8 is attached to a second flywheel assembly 5 to bias elastically a frictional connection portion 54 against a friction surface 21a of a flywheel 21. A release device 10 releases the bias toward the frictional connection portion 54 by applying a load to the clutch cover assembly 8 in an axial direction toward the engine. A support plate 39 elastically supports the second flywheel assembly 5 such that the second flywheel assembly 5 can move in a bending direction. A bending direction movement suppression mechanism 24 suppresses bending movement of the second flywheel 5 by connecting the second flywheel assembly 5 to a disk-like member 13 when the clutch cover assembly 8 receives a load toward the engine in the axial direction.

Abstract: A clutch disk arrangement for a multi-disk clutch includes a hub element connectable to a shaft for rotation with the shaft about an axis of rotation. A carrier arrangement has a first carrier element and a second carrier element. The first carrier element is connected to the hub so that the first carrier element rotates with the hub. The second carrier element is connected to the first carrier element such that it is foxed with respect to rotation and axially movable relative to the first carrier element. The clutch disk arrangement further comprises at least two friction lining units. On of the friction lining units is firmly connected to the first carrier element and a second one of the friction elements is firmly connected to the second carrier element. Accordingly, the friction lining units are fixed with respect to rotation and axially movable relative to the hub element via the carrier arrangement.

Abstract: A damper mechanism is provided to suppress the enlargement of a prescribed angle in a damper mechanism. A clutch disk assembly 1 has an input rotary member 2, a spline hub 3, a damper section 4, a large friction mechanism 13, a friction suppressing mechanism, and an elastic member 104. The spline hub 3 is arranged to rotate relative to the input rotary member 2. The damper section 4 couples the input rotary member 2 and the spline hub 3 together rotationally. The large friction mechanism 13 can generate friction when the input rotary member 2 and the spline hub rotate relative to each other. The friction suppressing mechanism is a rotational gap &thgr;ACp for preventing the large friction mechanism operating within a prescribed angular range. The elastic member 104 softens the impact between the members that touch against each other at the end of the prescribed angular range.

Abstract: Each clutch disk has a hub area designed to be connected nonrotatably to a power takeoff element and a friction surface area designed to be clamped between opposing friction surfaces. Each clutch disk has a torsional vibration damper arrangement including two cover disk elements connected to the hub area for rotation in common, and a central disk element connected to the friction surface area for rotation in common. The central disk element is or can be brought into torque-transmitting connection with the cover disk elements via a damper element arrangement. The central disk element has a damper element interaction area and, radially outside the damper element interaction area, a friction surface carrier area, which is offset with respect to the damper element interaction area in the direction of an axis of rotation.

Abstract: A driven disk in a clutch comprises a hub having a flange extending radially therefrom and having a spring cover affixed thereto. The spring cover defines at least one spring cavity therein and has two ends. Opposing first portions of the two ends define a first cavity length, and second opposing portions of the two ends define a second cavity length. A first spring is retained within the spring cavity wherein the first spring bears against the first end portions defining the first length. A second spring is also retained within the spring cavity wherein the second spring bears against the second end portions defining the second length.

Abstract: A start-up clutch assembly (10) for translating torque between a prime mover and a transmission includes a drive member (16) and a clutch pack (30) is supported between the drive (16) and driven members (24). The clutch pack (30) is operable to move between a closed pack mode and an open pack mode to connect and disconnect the drive and driven members (16, 24) to selectively transfer and interrupt torque translation therebetween. A torque apply piston assembly (54) is operable to move between a disengaged position to connect and disconnect the drive and driven members and to provide a constant biasing force so that the clutch pack (30) normally operates in the closed pack mode to translate torque between the drive and driven members (16, 24).

Abstract: A flywheel device for a prime mover can be made compact in axial size and has an effectively increased inertial mass. The flywheel device includes a drive plate and a mass ring. The drive plate has an annular projection and is attached to a crankshaft concentric with the crankshaft. The mass ring has an annular recess and is concentrically attached to the drive plate by the annular recess being fitted on the annular projection of the drive plate. The flywheel device transmits torque from an engine as the prime mover to the input shaft of an automatic transmission while reducing variation in the torque.

Abstract: A clutch disk for a friction clutch includes a friction lining carrier and at least one friction lining element, which is connected to the friction lining carrier for rotation in common with it, and which can shift in the circumferential direction relative to this carrier against the pretensioning effect of a restoring arrangement. The disk also includes a friction device, which generates a frictional force acting in opposition to the displacement of the friction lining element relative to the friction lining carrier.

Abstract: A damper mechanism is provided to suppress the enlargement of a prescribed angle in a damper mechanism. A clutch disk assembly 1 has an input rotary member 2, a spline hub 3, a damper section 4, a large friction mechanism 13, a friction suppressing mechanism, and an elastic member 104. The spline hub 3 is arranged to rotate relative to the input rotary member 2. The damper section 4 couples the input rotary member 2 and the spline hub 3 together rotationally. The large friction mechanism 13 can generate friction when the input rotary member 2 and the spline hub rotate relative to each other. The friction suppressing mechanism is a rotational gap &thgr;ACp for preventing the large friction mechanism operating within a prescribed angular range. The elastic member 104 softens the impact between the members that touch against each other at the end of the prescribed angular range.

Abstract: A lockup device 1 is disposed inside a fluid chamber between a front cover 3 and a turbine 4 and provided with a clutch-purpose friction plate 12, a pair of drive the plates 13 and 14, a driven plate 15, and coil springs 16. The friction plate 12 can be coupled with the front cover 3. An extended part 18 extends from one of the plates 13 and 14 toward the other and engages with the inside circumferential edge of the friction plate 12 such that the friction plate cannot rotate but can move in the axial direction relative to the extended part. The driven plate 15 is fixed to the turbine 4. The coil springs 16 are compressed between pair of drive the plates 13 and 14 and the driven plate 15 when the pair of drive plates and the driven plate rotate relative to each other.

Abstract: A torsion damping mechanism with a torsion damper with an input side and an output side, where the input side and the output side are connected elastically to each other by spring-type stored energy elements for rotation in common auxiliary mass which can rotate coaxially to the torsion damping mechanism is connected frictionally to the torsion damping mechanism by way of a friction area, where the frictional connection between the torsion damping mechanism and the auxiliary mass has a predetermined frictional moment. When this moment is exceeded during the occurrence of peaks in the torque being applied to the torsion damping mechanism, the auxiliary mass can slip or slips.

Abstract: A bridging clutch is installed in a fluid medium-filled housing of a hydrodynamic coupling device located between a drive shaft and a transmission input shaft, the coupling device also containing a pump wheel and a turbine wheel. The bridging clutch is provided with a piston, which, when moved into a first axial position, brings at least one friction element into working connection with at least one friction surface, and, when moved into a second axial position, at least partially releases this working connection, and with a torsional vibration damper, which is designed with at least one drive element and with at least one takeoff element, at least one of which has openings for circumferential springs and actuating areas for these springs. At least one of the takeoff elements acts a carrier element for the turbine wheel, which is held otherwise without radial support in the housing.

Abstract: A driving plate for a multi-plate clutch system includes a plurality of external teeth adapted to be matingly engaged within corresponding internal teeth of a housing of the clutch system. The external teeth are disposed substantially equidistantly along the circumference of the driving plate. At least one tooth of the external teeth is disposed offset in the circumferential direction from adjacent external teeth.

Abstract: A torque-transmitting apparatus for motor vehicles includes a hydrokinetic torque converter with a housing connected to the driving shaft of an engine. The housing contains a pump and a turbine, the latter arranged to drive an input shaft of a power train. At least one damper is arranged in the power flow path between the turbine and a rotary output element of the apparatus. The damper has an input member constrained to rotate with the turbine and an output member connected to the rotary output element. The input member and the output member are rotatable relative to each other against the opposing forces of energy-storing devices arranged between the input member and the output member. The input member has a radially outer portion in form-locking engagement with the turbine.

Abstract: A hub ring for use in a clutch disk includes an inner circumference which can engage a hub; and a pair of axially opposed front sides. At least one of the front sides has means for positively engaging a structural component arranged against the respective front side so that torque can be transmitted from the structural component to the hub.

Abstract: A dual mass flywheel and clutch system for minimizing torsional vibration levels during engine start-up and during low speed engine operation where the rotational moment of inertia of a clutch input assembly is minimized to raise the torsional natural frequency of the dual mass clutch system above the engine firing frequency when the clutch is disengaged to reduce the level of torsional vibration during engine start-up. After engine start-up, the dual mass clutch system is engaged and the torsional natural frequency of the clutch system returns to a lower frequency due to the rotation of the clutch output assembly thereby effectively reducing the torsional vibration levels in the vehicle driveline in a normal manner.

Abstract: A clutch disk assembly 1 has a pair of axially facing plates 12 and 13. A relatively rotatable flange 8 is provided between the plates 12 and 13. A first elastic member 30 exhibits high rigidity on the positive side of the torsional characteristics. A second elastic member 31 is provided to operate in parallel with first elastic member 30 to realize a low rigidity on the negative side of the torsional characteristics. The stop pins 22 affix plates 12 and 13 together. The stop pins 22 and notches 8c are provided on the outer periphery of the flange 8 constitute a stopper mechanism 86 for regulating the relative rotation between the plates 12 and 13 and the flange 8. The stopper mechanism 86 is located on radially outside the second elastic members 31. The stop pins 22 are movable on the outer periphery of the second elastic members 31.

Abstract: The present invention provides a starting clutch in which an input side element and an output side element are joined together by applying an axial load thereby to transmit a power, which clutch comprises an urging device for always providing the axial load, and a releasing device for releasing the input side element and the output side element from the axial load.

Abstract: The torque transmitting connection between the output shaft of the prime mover and the input shaft or shafts of the transmission in the power train of a motor vehicle is established by a torsional vibration damper and a clutch assembly. The damper has an input member affixed to the output shaft and an output element separably coupled to a counterpressure plate of a single friction clutch or of one of two friction clutches of the clutch assembly by an axial plug-in connection. The output element(s) of the clutch(es) is or are connected to a single input shaft or to discrete input shafts of the transmission. The plug-in connection renders it possible to assemble the torsional vibration damper with the prime mover and to assemble the clutch assembly with the transmission prior to the establishment of a torque transmitting connection between the damper and the clutch assembly.

Abstract: A multiple clutch arrangement includes a drive member, first and second output members, a first clutch arrangement for selective activation of a first torque transmission path between the drive member and the first output member, and a second clutch arrangement for selective activation of a second torque transmission path between the drive member and the second output member. A torsional vibration damper arrangement is arranged in at least one of the first and second clutch arrangements in the associated torque transmission path.

Abstract: A clutch disk including a hub area and a plurality of friction lining elements carried on the hub area, which are arranged in sequence around the circumference relative to the clutch disk rotational axis, and provide at least part of the friction surface area, where the friction lining elements are designed to make frictional contact with the associated opposing friction surface of a flywheel, a pressure plate, or the like. At least one friction lining element is carried on the hub area with freedom to shift position essentially in the circumferential direction relative to the rotational axis.

Abstract: An object of the invention is to suppress an increase in an inner diameter of a friction facing of a clutch disk assembly, which may be caused by fixing portions of a plate member pair of a clutch disk assembly 1. The clutch disk assembly 1 is provided to couple to a flywheel 2 of an engine. The clutch disk assembly 1 includes a friction facing 20, a pair of plates 15 and 16, a hub 8, and coil springs 11. The plates 15 and 16 have fixing portions 34 fixing their outer peripheral portions together. The coil springs elastically couple the paired plates 15 and 16 to the hub 8 in the rotating direction. The fixing portions 34 project radially outward beyond the inner periphery of the friction facing 20.

Abstract: A lockup device 1 is disposed inside a fluid chamber between a front cover 3 and a turbine 4 and provided with a clutch-purpose friction plate 12, a pair of drive the plates 13 and 14, a driven plate 15, and coil springs 16. The friction plate 12 can be coupled with the front cover 3. An extended part 18 extends from one of the plates 13 and 14 toward the other and engages with the inside circumferential edge of the friction plate 12 such that the friction plate cannot rotate but can move in the axial direction relative to the extended part. The driven plate 15 is fixed to the turbine 4. The coil springs 16 are compressed between pair of drive the plates 13 and 14 and the driven plate 15 when the pair of drive plates and the driven plate rotate relative to each other.

Abstract: A multi-clutch arrangement, especially a dual clutch for motor vehicles, comprising a first clutch area with a first pressure plate arrangement, with a first opposing support arrangement, and with a first clutch disk arrangement , which can be clamped between the first pressure plate arrangement and the first opposing support arrangement to transmit torque via the first clutch area; and a second clutch area with a second pressure plate arrangement, with a second opposing support arrangement, and with a second clutch disk arrangement, which can be clamped between the second pressure plate arrangement and the second opposing support arrangement to transmit torque via the second clutch area. A torsional vibration damper arrangement is assigned to at least one of the clutch areas, and where—relative to an axis of rotation (A)—the torsional vibration damper arrangement is arranged at least partially in the axial area of the first clutch area and/or of the second clutch area.

Abstract: A clutch disk arrangement for a multi-disk clutch includes a hub element connectable to a shaft for rotation with the shaft about an axis of rotation. A carrier arrangement has a first carrier element and a second carrier element. The first carrier element is connected to the hub so that the first carrier element rotates with the hub. The second carrier element is connected to the first carrier element such that it is foxed with respect to rotation and axially movable relative to the first carrier element. The clutch disk arrangement further comprises at least two friction lining units. On of the friction lining units is firmly connected to the first carrier element and a second one of the friction elements is firmly connected to the second carrier element. Accordingly, the friction lining units are fixed with respect to rotation and axially movable relative to the hub element via the carrier arrangement.

Abstract: A lock-up clutch of a torque converter includes an annular clutch outer mounted in a side cover, a clutch inner connected to a turbine impeller, a driving friction plate axially movably connected to the clutch outer, first and second follower friction plates connected to the clutch inner for movement toward and away from each other with the driving friction plate interposed therebetween, an inner chamber defined between the first and second follower friction plates, and an outer chamber faced by outer sides of the first and second follower friction plates. When the inside of the outer chamber is put at a pressure higher than that in the inner chamber, the follower friction plates are brought into pressure contact with the driving friction plate, and an urging force on the follower friction plates is not applied to the side cover.

Abstract: A motor vehicle drive train with a clutch device installed between a drive unit and a transmission having at least one transmission input shaft to transmit torque between the drive unit and the transmission. The clutch device comprises at least one clutch arrangement assigned to a respective transmission input shaft, where an input side of the clutch device is connected directly or indirectly by way of a torque-transmitting arrangement to a connecting end of a power takeoff shaft of the drive unit.

Abstract: Each clutch disk has a hub area designed to be connected nonrotatably to a power takeoff element and a friction surface area designed to be clamped between opposing friction surfaces. Each clutch disk has a torsional vibration damper arrangement including two cover disk elements connected to the hub area for rotation in common, and a central disk element connected to the friction surface area for rotation in common. The central disk element is or can be brought into torque-transmitting connection with the cover disk elements via a damper element arrangement. The central disk element has a damper element interaction area and, radially outside the damper element interaction area, a friction surface carrier area, which is offset with respect to the damper element interaction area in the direction of an axis of rotation.

Abstract: A pressure plate assembly for a friction clutch, which assembly includes a housing; a pressure plate connected to the housing for rotation in common around an axis of rotation and which is free to move axially with respect to the housing; a stored-energy device, which pretensions the pressure plate in the axial direction with respect to the housing; a wear-compensating device which acts in the path of support between the stored-energy device and at least one of the housing and the pressure plate and comprises at least one wear-compensating element which is free to move when wear occurs and/or when wear is compensated; an indicator arrangement, comprising at least one indicator opening in the housing and at least one indicator element on a wear-compensating element.

Abstract: A torsion damping device is mounted between two coaxial rotating members for transmitting a rotary toque from one member to the other with damping of vibrations and torque oscillations the damping device comprising, two rings coaxial with the rotating members, rotational coupling means between the two rotating members and the rings, circumferentially acting resilient members mounted between the rings in housing which are formed in the rings and which include a device for abutment of the ends of the resilient members, the two rings are rotatable with respect to each other and with respect to the two rotating members with a limited angular displacement, and are urged in opposite directions of rotation by the resilient members and toward abutment on the device for coupling them to the respective ones of the rotating members.

Abstract: A torsion damping apparatus between the crankshaft of the engine and the input shaft of the change-speed transmission of a motor vehicle has two flywheels one of which is driven by the crankshaft and the other of which drives the input shaft by way of a friction clutch which generates heat. In order to prevent the transfer of heat from the friction clutch to the antifriction bearing between the flywheels, which are rotatable relative to each other against the opposition of a damper, the bearing is at least partially surrounded by a thermal barrier of synthetic plastic, ceramic or metallic material which prolongs the useful life of the bearing and enhances the torsion damping action of the damper. The thermal barrier can constitute or form part of the damper.