Abstract: A fly-wheel includes a first part and a second part. Both parts are rotatably mounted with respect to the other. Torsional springs are provided in torque-transmitting engagement between the two parts of the fly-wheel. Further, a friction device is provided between the two parts. This friction device is controlled by fly weights and a biasing spring such that below the idling rpm of an internal combustion engine driving the fly-wheel the friction device maintains an increased frictional torque-transmission between the two part.

Abstract: In a torque transmitting torsional vibration damper device for use in a torque transmission path of a motor vehicle between the engine and the gear box a central plate is provided. Two sides plates are provided on both sides of the central plate. The side plates are interconnected for common rotation. Each of the central plate and the side plates is provided with at least two circumferentially extending windows. Respective windows of the central plate and the side plates are aligned in axial direction. Each group of mutually aligned windows receives a pair of torque transmitting compressional springs arranged in series and spaced in circumferential direction. Said discs are provided between the central plate and the side plates. These sides discs are used for circumferential torque transmission between mutually adjacent ends of the compressional springs of each pair. The side discs are supported in radial direction only by engagement with the compressional springs.

Abstract: In a fly-wheel unit of any desired construction type including two separate fly-wheel members, the torsion springs are housed in a liquid receiving chamber which is at least partially filled with a lubricant or with a coolant. In this way inherent noises and excess wear can be damped and heat generation can be uniformly distributed.

Abstract: The clutch disc for a motor vehicle friction clutch comprises a friction lining carrier mounted rotatably on a hub, a torsional vibration spring means and a torsional vibration friction damper. The friction damper is arranged between side discs of the friction lining carrier and includes a spring of annular disc form and at least one friction ring seated in the support path. The installation height of the axially acting spring is variable after the assembly of the clutch disc, by an adjusting device. The adjusting device can be two adjusting elements rotatable in relation to one another, which vary the installation height of the spring by steps or steplessly. The adjusting device can also comprise permanently deformable adjusting elements or adjusting elements seated with press fit on the hub.

Abstract: Clutch disc for a motor vehicle friction clutch comprises a hub and a disc part enclosing the hub and coupled with predetermined play in rotation but otherwise non-rotatably with the hub. Side discs on axially opposite sides of the disc part form one unit mounted on the hub rotatably through a limited first angle relative to the disc part. The disc part is coupled rotationally elastically with the hub through at least one spring of an idling vibration damper. Several springs of an under-load vibration damper, arranged in windows of the disc part and of the two side discs, couple the side discs rotationally elastically with the disc part. The under-load vibration damper comprises a friction device having two control discs arranged on axially opposite sides of the disc part between the disc part and one each of the two side discs. The control discs are connected non-rotatably with one another.

Abstract: The clutch disc for a motor vehicle friction clutch comprises a friction damper with friction linings resiliently braced in axially between disc parts. The friction linings have surface regions with different coefficients of friction which can be brought into operative engagement according to choice by control means for the adjustment of the friction torque of the friction damper. In this way the friction torque can be adjusted for the compensation of construction tolerances of the clutch disc, without variation of the spring stress of the friction damper.

Abstract: The clutch disc for a motor vehicle friction disc clutch comprises a hub part from which a hub flange provided with radially outwardly protruding teeth protrudes radially. A disc part provided with clutch friction linings which comprises an annular disc provided with radially inwardly protruding teeth is mounted rotatably on the hub part. The teeth of the hub flange and the annular disc engage in one another with play in the circumferential direction. The annular disc and the hub flange comprise at least one pair of mutually radially opposite apertures each having two stop faces directed towards one another in the circumferential direction. The stop faces, preferably of the annular disc extend over substantially the entire radial height of a spring arranged in the aperture of this part. The spring is supported on the stop faces of the other part through a retaining stirrup piece which is U-shaped seen in the circumferential direction.

Abstract: The clutch disc for a motor vehicle friction clutch comprises a hub and a friction lining carrier mounted rotatably on the hub. A torsional vibration spring means is arranged in the torque transmission path between the friction lining carrier and the hub. A torsional vibration damper comprises at least two friction elements lying axially resiliently flat against one another. One of the friction elements is connected non-rotatably with the hub and the other friction element is connected non-rotatably with the friction lining carrier. One of the friction elements is held displaceably in the radial direction, along the friction face of the other friction element, on the hub or the friction lining carrier. By radial adjustment of the friction element the friction torque can be adjusted and construction tolerances of the clutch disc can be compensated.

Abstract: The clutch disc for a motor vehicle friction disc clutch comprises a hub provided with an external toothing, and two hub discs of which a first hub disc carries on its internal circumference an internal toothing meshing with play in rotation in the external toothing and the other hub disc is connected non-rotatably and without play in rotation with the hub. Axially on both sides of the first hub disc, side discs are connected with clutch friction linings to form a unit mounted rotatably on the hub. Radially within a zone defined by damping springs of the under-load vibration damper, there are provided, axially between the side discs, damping spring of an idling vibration damper which couple the hub disc through the damping springs with the second hub disc.