Abstract: A torsion damping device comprising guide rings, a damper plate, and a hub which is secured to a driven shaft for rotation of the latter therewith. The device includes a dynamic vibration damper attached to the hub, with this damper including a weight which is joined through a block of elastic material to a support. This support in turn is joined to the hub for rotation with the latter after a clearance has been taken up.

Abstract: The invention concerns a control system of the kind employing a clutch release bearing which, in response to a control device is adapted to act axially in a positive manner, in one direction, on a clutch release diaphram controlling the clutch. In accordance with the invention, the clutch release which is a double-acting clutch release bearing, being adapted to act axially equally well in both directions in order to absorb excess torque transmitted through the clutch.

Abstract: A torsional damper device, such as a clutch disk for an automobile vehicle, comprises at least two coaxial parts adapted to rotate relative to one another and a bearing disposed radially between them. This bearing comprises two separate parts, one on each side of a diametral plane of the device. Each is locked axially to a respective one of the coaxial parts and provides axial bearing support for the other coaxial part.

Abstract: A torsional damper device comprises at least two coaxial parts disposed to rotate relative to one another within defined limits of relative angular displacement. Circumferentially acting elastic means operative between these parts over at least part of this relative angular displacement resist same. A first coaxial part comprises a hub and an annular hub flange around the hub, constrained to rotate with the hub for one circumferential direction. A second coaxial part comprises at least one annular guide ring around the hub free to rotate relative to it in both circumferential directions. The device further comprises an annular hub counter-flange around the hub constrained to rotate with the hub for one circumferential direction. The hub flange and the hub counter-flange are each free to rotate relative to the hub in the circumferential direction opposite that in which it is constrained to rotate with it.

Abstract: A torsional damper device comprises at least three coaxial parts rotatable relative to one another in pairs within defined limits of relative angular displacement. Such rotation occurs against circumferentially acting elastic members operative between them over part at least of such relative angular displacement. A first coaxial part comprises a hub. A second coaxial part comprises at least one transverse annular hub flange around the hub. First teeth with clearance are disposed between the hub and the hub flange. A third coaxial part comprises at least one transverse annular flange around but having no direct relationship with the hub, parallel to the hub flange. The second part further comprises at least one transverse annular auxiliary flange around the hub, parallel to and associated with the hub flange. Second teeth with clearance are disposed between the auxiliary flange and the hub.

Abstract: A torsional damper suitable for use in a friction clutch plate for an automotive vehicle comprises a hub and a disk mounted so as to rotate relative to one another against the action of springs. An intermediate member responsive to centrifugal force moves reversibly between a standby position and an operative position, in order to modify the operating characteristics of the damper. The intermediate member modifies these characteristics in its standby position, and can occupy either of two operative positions, in one of which it has no effect on and in the other of which it also modifies the aforementioned operating characteristics.