Abstract: The torsion damper for a lock-up clutch (4) comprises two coaxial parts (40, 60) which are movable with respect to each other against circumferentially acting springs (50), namely an input part in the form of a guide ring (40) and an output part (60) called a damper plate, in which the guide ring (40) comprises a retaining portion (42, 142 . . . ) and engagement portions (45, 145 . . . ) for the external retention of the springs (50) and for their engagement, respectively, while the damper plate (60) also has engagement portions (65, 165 . . . ) for engagement with the springs (50). The damper plate (60) has a retaining portion (61, 161 . . . ) in the form of a half shell, the engagement portions of the damper plate (60) are carried by the said retaining portion of the damper plate (60), and the retaining portions of the guide ring (40) and of the damper plate (60) are offset axially with respect to each other.

Abstract: The starter apparatus for an internal combustion engine includes a starter motor; an axially shiftable starting gear engageable with a ring gear of the internal combustion engine; a drive train for transferring rotary motion of a drive shaft of the starter motor to the starting gear, the drive train including a plurality of parts from the starting gear to the drive shaft; a free wheel clutch coupled with the drive shaft of the starter motor; and a shock absorber spring device for damping torque shocks between the starting gear and the drive shaft occurring on operation of the starter and located in the drive train between the starting gear and the drive shaft of the starter motor.

Abstract: A torsional vibration damper for the drive line of a motor vehicle includes an input damper part rotatable about an axis of rotation, an output damper part rotatable about the axis of rotation relative to the input damper part over a limited relative angle of rotation, a spring system coupling the two damper parts together in a rotationally elastic manner, and a friction ring axially clamped between friction surfaces of the damper parts by an axial spring force. The friction ring has a carrier of substantially annular disk-shaped form and consisting substantially of fibrous-material-reinforced synthetic plastic material and friction linings affixed to the carrier. The friction linings are composed of a synthetic plastic material substantially devoid of reinforcing materials and projecting beyond the carrier on both axial sides by a distance corresponding to a predetermined abrasion volume. The carrier of the friction ring is coupled to one of the damper parts.

Abstract: A composite flywheel having coaxial primary and secondary flywheels, which can turn relative to each other against the opposition of one or more friction generating devices and/or dampers, employs a substantially cup-shaped carrier with one or more signal generators in the form of notches, recesses, grooves, holes, projections or the like. The carrier includes a radially inwardly extending washer-like portion and a sleeve-like portion, which sleeve-like portion is in one piece with the radially outermost part of the washer-like portion. The signal generator(s) is (are) provided in or on that part of the sleeve-like portion which projects outwardly beyond a sleeve-like part of the radially outer end portion of the primary flywheel. The sleeve-like part of the end portion of the primary flywheel surrounds and confines the washer-like portion and is welded to the sleeve-like portion of the carrier.