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: 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: A torsion damping device, for example for a motor vehicle fluid transmission, includes a first pair of guide rings, a second pair of guide rings fixed to a torque input element, a first hub fixed to a second pair of guide rings, a second hub, a first series of springs coupling the first pair of guide rings to the first hub, a second series of springs coupling the second pair of guide rings to the second hub, and an abutment member for limiting the relative angular displacement between the first pair of guide rings and the first hub. The first pair of guide rings is fastened to the torque input element by fastening members. These fastening members and the abutment member are both located radially inwardly of one of the two series of springs, and radially outwardly of the other series.

Abstract: A torsion damping device comprises two coaxial parts, one of which consists of a damper plate and a hub coaxial with the damper plate, the hub and damper plate having cooperating teeth defining a circumferential clearance between them so that the hub and damper plate are able to undergo a limited relative angular displacement which is defined by a circumferential clearance between the two sets of teeth.A ring extends parallel to the damper plate and has a further set of teeth, of resilient material, complementary to the hub teeth and meshing with the latter so as to define a further circumferential clearance between the resilient teeth and the hub teeth. This further circumferential clearance is smaller than that between the two sets of teeth of the damper plate and the hub themselves. In addition, the set of teeth on the hub is extended axially so that it can mesh with the teeth on both the damper plate and the ring.

Abstract: A torsion damper assembly for an automotive clutch has a first part comprising a hub, a second part comprising two hub plates and a third part, the three parts being coaxial and rotatable independently of each other against springs acting over at least a predetermined portion of the angular displacement. The assembly has two sets of additional springs. These are mounted in recesses in the hub plates and in the hub, with their recesses facing each other in the region of a loose coupling defined between the hub and the hub plates. The additional springs associated with one hub plate are mounted in one of the recesses of that hub plate and of the hub, with a different circumferential clearance from the clearance with which the springs associated with the other hub plate are mounted in the corresponding recesses of that other hub plate and of the hub.

Abstract: This invention relates to a friction clutch member of the kind having two friction pads which are fixed on annular support members which lie facing each other in the axial direction. A resilient progressive engagement member is interposed between the two friction pads, and includes a plurality of projecting bosses of resilient material, each boss being hollow in the middle and delimited at least over a major part of its periphery by a band of resilient material. The invention is especially applicable to automotive vehicles.

Abstract: A torsion damping device includes a damper plate, a hub and a guide ring, all mounted coaxially with each other, together with a draw ring and a contact ring. A resilient gripping spring associated with the draw ring is, with the latter, confined axially between the contact ring and the damper plate, by virtue of an axial protuberance which is fixed with respect to at least one of the damper plate and contact ring. The draw ring engages on one of the two elements comprising the damper plate and the contact ring under the influence of the resilient gripping spring the latter engaging on the other one of these two elements.

Abstract: This invention relates to a torsion damping device, in particular for automotive vehicles, comprising two coaxial parts with a hub and a damper plate, and also having an intervention member for modifying the operating characteristics of the torsion damping device. The intervention member is able to occupy two working positions, and comprises at least one weight, moveable radially under the influence of centrifugal force and comprising a trapezoidal tenon which is engaged in a mortice of complementary trapezoidal shape formed in the hub, the weight being biassed against the action of centrifugal force by a resilient spring bearing at one end on the damper plate so as to urge the weight towards the base of the mortice.

Abstract: The present invention relates to a friction clutch of the kind having two friction pads coaxial with each other and adhesively bonded or moulded on to annular supports which are arranged to face each other in the axial direction.In accordance with the invention, a progression element is interposed between the two friction pads, this progression element comprising a plurality of protuberances of resilient material, some at least of which are secured to the supports, with the protuberances delimiting channels between them and having a surface at their outer periphery which is of greater circumferential length than the surface with which they are provided at their inner periphery.

Abstract: A torsion damping device has a pair of guide rings, a damper plate and a hub. Resilient are confined between the two guide rings, and arranged on either side of the damper plate so as to bear on the damper plate or the hub in such a way as to exert a biassing and gripping force thereon. There is a radial clearance between the hub and whichever one of the two coaxial parts of the damper is freely mounted with respect to the hub, in such a way that the hub is floatingly mounted with respect to that coaxial part.

Abstract: This invention is concerned with a torsion damping device for an automotive vehicle, of the kind comprising two coaxial parts and an intervention member for modifying the operating characteristics of the damping device. One of the two coaxial parts includes a hub, and the intervention member comprises at least one plate, resiliently deformable in the radial direction and with the hub extending through it. The intervention plate has, at its inner periphery, an inner surface which is adapted to come into engagement on an abutment surface which is fixed with respect to the outer periphery of the hub. The plate is fixed axially in at least two points to one of the said coaxial parts of the torsion damper that is not rotatable with the hub. It is moveable radially between the said abutment surface of the hub and at least one end stop abutment forming part of one of the coaxial parts of the device.

Abstract: The present invention is concerned with torsion damping devices of the kind comprising guide rings, a damper plate, a hub, and friction rings which form part of a first friction device and a second friction device, respectively. An abutment is provided for coupling together in a sub-assembly one of the friction rings and either the appropriate guide ring or the damper plate. In addition, axial retainers are provided between the two friction rings.

Abstract: In a monobloc hub of the kind having an integral hub plate formed with openings at or towards its outer periphery, the hub is also provided with a number of projections. Some of the opening are adapted to receive circumferentially acting resilient springs. The hub is preferably that of a torsion damper, particularly for a friction clutch for an automotive vehicle. The hub is formed in one piece by orbital forging. The various projections provide a local increase in the thickness of the hub plate, wherever required and especially in the region of the various peripheral openings in the hub plate.

Abstract: A torsion damping device for automotive vehicles, which comprises three coaxial parts (A, B, C) mounted rotatably with respect to each other against the action of circumferentially acting resilient springs, the second part (B) comprises two damper plates (12, 12') which, independently of each other, each comprise an annular member around the hub (10) which constitutes the first part (A), with, between them and the hub (10), relative rotational displacement devices which are arranged alternately as between one damper plate and the other. Circumferentially acting resilient springs (23, 23'), separate from each other, are interposed between, on the one hand, the hub (10) and one of the damper plates (12, 12'), and on the other hand, between the hub (10) and the other damper plate (12', 12).

Abstract: A torsion damping device comprises guide rings, a damper plate, and a viscous damping assembly of the kind confined within the interior of a two-piece housing. A coupling is provided for coupling this housing with the sub-assembly consisting of the guide rings, the hub and the damper plate, and for assuring its rotation with respect to this sub-assembly after a clearance has been taken up. This coupling is provided between firstly, one of the two parts of the housing and the guide rings, and secondly between the other part of the housing and the damper plate. The invention is applicable to automotive vehicles.

Abstract: A torsion damper which comprises a pair of guide rings connected together by spacers, a disc and a damper plate. The damper plate is mounted coaxially within a space delimited by the disc. A passageway is provided in the disc for receiving the spacers. The passageway consists of an aperture which is formed partly in an inner periphery of disc and in an outer periphery of the damper plate.

Abstract: A torsion damping device in a clutch plate is fitted with an interposing element comprising two movable centrifugal plates. According to the invention, the two movable plates are connected to one another by at least one transmission element which is rotatable relative to the plates in such a way that a radial displacement of one of the movable plates causes rotation of the transmission element and a radial displacement in the opposite direction of the other movable plate.

Abstract: A torsion damper, especially for a friction disc clutch for an automotive vehicle, comprising a hub, a main damper plate, at least one guide ring, and a ring member which is resiliently deformable. The ring member comprises at least one first part which is resiliently deformable and a second part comprising pins for centring with respect to the damping plate.

Abstract: The invention concerns a torsion damper, especially for a disc type friction clutch for an automotive vehicle. The damper comprises a lining support plate and a hub which are movable angularly with respect to each other. The support plate and the hub are coupled together by two torsion damping devices, one of which comprises guide rings and a damper plate mounted on the hub and centered with respect to the guide rings by means of a bush surrounding the hub and having a face plate with axially extending centering pins or the like, engaged in corresponding apertures in the damper plate or face plate. The invention is especially applicable to the automobile field.

Abstract: A clutch friction disc has a hub and a support for friction linings which are mounted for limited relative angular movement. Two torsion damping devices control said angular movement, comprising a predamper and a stronger principal damper. The predamper comprises an annular plate equipped with displacement springs between two guiding washers and for axial connection between these washers there are provided elastic tongues originating from one of the plates and arranged to clip onto the other, these clipping tongues passing radially to the outside of the annular plate and alternating around the periphery with spacing lugs. These clipping tongues serve only for the preassembly of the predamper and subassembly in which there is also incorporated a spring for damping the oscillations of the predamper.