Abstract: A friction clutch comprises a reaction plate, a friction disc (100), bearing at its outer periphery at least a friction lining (101), a pressure plate (11), a cover (12) fixed on the reaction plate, a diaphragm (13) operating between the cover (12) and the pressure plate (11) via secondary support (17) and primary support (18), a wear take-up device comprising a ramp (14) adapted to co-operate with a counter-ramp (15), a toothing (19) wherewith co-operates a tangentially arranged endless screw (23), the ramp (14) being locked in rotation with the toothing (19), ratchet wheel (20) driving in rotation the endless screw (23) consisting of a ratchet locked in rotation with the endless screw (23) and controlled via a control tab (36) whereof the travel is limited by a so-called control stop (33), the endless screw (23) and the ratchet (20) being borne by a support (22) integral with the cover (12): the control stop (33), as well as the primary support (18), is arranged on the cover (12).

Abstract: The invention concerns a clutch mechanism comprising a wear take-up device with a ramp (32) ring (330) coupled in rotation into axial mobility with an intermediate part (310) equipped with a tooting (31) engaged in an endless screw (36) integral with a cover. The invention is applicable to a motor vehicle.

Abstract: The invention concerns a friction plate (15) in particular for motor vehicle clutch, comprising a support ring-shaped disk (14) whereof the outer peripheral part is divided into radial blades (70) bearing friction linings, in particular axially on either side, each blade (70) being of the tripod type and having, by means of folds (77, 78), a central bearing zone (76) linked to the disk (14) central part (114) and two peripheral bearing zones (75), characterized in that each of the two peripheral bearing zones (75) is connected (214) to the disk (14) central part (114).

Abstract: The friction clutch comprises a cover (8) with a base (80), a pressure plate (3) with a front friction face (30) for co-operating with a clutch friction and, set between the pressure plate (3) and the base (80) of the cover (8), a diaphragm (2) with a peripheral part extended inward by fingers (23) to oppose at will, by means of a nose (11) of a clutch bearing (10), the action of said peripheral part (21), a booster elastic washer (7) acting on the fingers (23) of the diaphragm (2) in the declutching direction resting on the cover (8): the booster washer (7) is arranged between the cover (8) and the leading-edge piece or nose (11) such that it is adapted to operate on the fingers (23) of the diaphragm (2) via said leading-edge piece or nose (11).

Abstract: The friction clutch comprises a friction disc, a pressure plate (1), a cover plate (2), a diaphragm (3) working between, firstly, the cover plate (2) and secondly the pressure plate (1), the said clutch also including a wear compensating device comprising ramps (11) disposed circumferentially and adapted so as to be driven in rotation by means of a set of teeth (18) which they carry at their periphery and with which a tangentially disposed worm (13) cooperates, a ratchet wheel (20) for driving the worm (13) in rotation being provided and rendered operational by wear in the friction liners when the clutch is engaged, together with non-return catches (36) for preventing the worm (13) from turning in the direction opposite to that in which it is driven in rotation by the ratchet wheel when it is operational, the worm (13), the non-return catches (36) and the ratchet wheel (20) being carried by a support (12) fixed to the cover plate (2): the ratchet wheel (20) of the worm (13) is controlled by the diaphragm (3).

Abstract: A clutch mechanism, in particular for motor vehicles, comprising a cover (8) with a base (80), a clutch thrust plate (3) with front friction surface (30) co-operating with a clutch friction (2), and, set between the clutch thrust plate (3) rear surface (36) and the cover (8) base (80), resilient clutch means with axial action (4, 6) axially stressing the clutch thrust plate (3) in a direction opposite to the cover (8) base (80) and a declutching device (7) to counter at will the action of said resilient clutch means (4, 6): the resilient clutch means (4, 6) comprise two Belleville washers (4, 6) series-mounted between the clutch thrust plate (3) and the cover (8), and one (4) of the Belleville washers (4, 6) is in contact at its outer periphery with the clutch thrust plate (3), while the other (6) rests at its outer periphery on the cover (8), said washers (4, 6) sloping inversely, means for transmitting the force (5) carried by the declutching device (7) being incorporated between the inner peripheral zones

Abstract: The friction clutch, for a vehicle, comprises a friction disc, a pressure plate (1), a cover plate (2), and an axially acting diaphragm (3) working between the cover plate (2) and the pressure plate (1), the pressure plate (1) being fixed to the cover plate (2) for rotation with it, while being displaceable axially with respect thereto and being subjected to the action of biassing tongues (9) for returning the pressure plate (1) axially towards the cover plate (2), the said clutch further comprising a wear compensating device which includes circumferentially disposed ramps (11) adapted to be driven in rotation by a set of teeth (18), which they carry at their periphery and with which a worm (13) cooperates, a ratchet wheel (20) being provided for driving the worm (13) in rotation: the ramps (11) have ventilating apertures (16A).

Abstract: A device for taking up clearance designed to equip a diaphragm friction clutch, having circumferentially distributed ramps designed to cooperate with the thrust plate of the clutch, support areas designed to receive the axial force of the diaphragm of the clutch and a toothing designed to drive them in rotation: the device consists of a ring having on one of its faces ramps alternating circumferentially with support areas constituting the support area.

Abstract: The friction clutch includes a device for taking up clearance comprising a ramp device disposed circumferentially and adapted to be rotated by a toothing which they carry at their periphery and with which cooperates a worm disposed tangentially: the worm is mounted so as to slide along its axis while being subject to the action of a so-called taking-up elastic spring and it is when it is moved along its axis that it rotates ramps; the load of the taking-up spring increasing with the wear on the linings the axial movement is obtained when the load is sufficiently high to overcome the axial force due to the return device to which the ramps are subject, with the clutch released; driving of the worm in rotation is provided and made operational by the wear on the friction linings when the clutch is engaged; non-return devices prevent the worm from turning in the direction opposite that in which it is driven by the driving devices.

Abstract: The friction clutch comprises a pressure plate (120) consisting of two half plates (120A, 120B), which are displaceable axially with respect to each other under the action of a device (111) for taking up clearance due to wear, in which this device includes at least one pair of complementary ramps (190, 191), an arming piece (101) which is mounted for rotation, with respect to a ramp (190) called an adjusting ramp, between two positions, one of which corresponds to a state of wear in the friction liners (130), with a resilient arming device biassing the arming piece (101) towards the said position, a first locking device (112), adapted to immobilise the arming piece (101) against rotation with respect to the pressure plate (120), being able to be made inoperative under the action of a second locking device (212) which is adapted to immobilise the said adjusting ramp (190) against rotation with respect to tie pressure plate (120), and being able to be made inoperative under the action of the trigger member (103

Abstract: A liner support disc for supporting friction liners, adapted to constitute a clutch friction wheel, especially for a motor vehicle, of the kind comprising a central portion and a peripheral portion divided into radial blades for receiving the friction liners, with each of the blades being joined integrally to the central portion through a foot, and comprising at least one support zone which is generally parallel to the mean plane of the central portion, for contact with at least one of the friction liners and for fastening of the latter. In a clutch friction wheel, the liners lie on either side of the peripheral portion.

Abstract: The clutch mechanism comprises a hollow cover plate (1) having at its outer periphery an annular skirt (3), at least one pressure plate (20), and a diaphragm (30), the outer periphery of which defines a Belleville ring (31), which, firstly, bears at its outer periphery on a deflection abutment (6, 60, 61, 62) carried by the cover plate (1) and, secondly, at its inner periphery it bears on a projecting element (22) of the pressure plate (20) so as to urge the plate (20) in a direction in which it is displaced away from the cover plate (1). The deflection abutment (6, 60, 61) is of resilient material and carries an integral centring extension (7, 71), oriented generally axially and interposed radially between the inner periphery of the skirt (3) of the cover plate (1) and the outer periphery of the diaphragm ( 30).

Abstract: In the liner support disc adapted to constitute a clutch friction wheel, especially for a motor vehicle, of the kind comprising a central portion (16) and a peripheral portion divided into radial blades (672) alternating in the circumferential direction with a series of radial tongues (671) in the same plane as the central portion (16) of the liner support disc, in which the blades (672) have, joined by bent portions (421), a central support zone (423) and two peripheral support zones (422) on either side of the zone (423), the peripheral zones (422) being offset axially with respect to the central zone (423), at least some of the tongues (671) have at least one support zone (622) offset axially towards the central zone of the blades (672) by virtue of a connecting bent portion (621).

Abstract: The clutch mechanism comprises a cover plate (3), at least one pressure plate (100), a diaphragm (4) bearing on the cover plate (3), in which assembly means (5), having primary (54, 61) and secondary (60) abutments, are arranged to mount the diaphragm (4) for its deflection. The secondary abutment (60) is defined by a ring of elastic material capable of being hard and adherent after being deposited.

Abstract: A friction clutch, especially for a motor vehicle, has a clutch friction wheel which includes a liner support disc having a central portion and a peripheral portion which is divided into blades, with friction liners being carried on both sides of the support disc and secured to these blades. At least some of the blades of the liner support disc are of tripod type, having at least one central support surface zone and two peripheral support surface zones. The central zone is connected firstly to the central portion of the support disc through a tangential fold, and secondly to the peripheral zones of the blade through oblique folds.

Abstract: A clutch friction wheel for a motor vehicle clutch comprises a support having slotted lobes projecting radially from an inner portion of the support. Friction pads are arranged back-to-back on either side of each lobe. Springs are interposed between two associated friction pads. The springs consist of profiled fins such as to define a wavy support having, for contact with one friction pad of each pair, a central zone having free circumferential end portions, and, for contact with the other friction pad of the same pair, marginal portions. One of these marginal portions projects from and is integral with the inner portion of the support.

Abstract: A friction liner for a motor vehicle clutch friction plate comprises a metallic support plate overlaid with a pad of friction material. The surface of the metallic support plate on which the pad of friction material is overlaid is smaller than the working surface of the pad, thus reducing the detrimental effects of deformation of the friction liner resulting from its heating.

Abstract: A clutch wheel for a plate type friction clutch comprises a clutch disc carrying a plurality of friction pads spaced coaxially around it. Each friction pad consists of two pad elements arranged back to back and movable axially with respect to each other against the action of a Belleville ring inserted between them. This axial movement is controlled within predetermined limits by abutment means consisting of cooperating elements of the two friction pads, or of at least one of the friction pads and the clutch disc. The Belleville ring is precompressed in such a way that, within the limits of the axial movement defined by the abutment means, it works only on a part of its characteristic curve in which the reaction force which it exerts is substantially constant.

Abstract: A friction disc comprises a circular clutch plate with a plurality of friction liners distributed around the clutch plate coaxially with the latter. Each friction liner is retained on the clutch plate, and comprises two pads. One of these pads is on one side of the clutch disc, and the other pad is on the other side. At least one of the pads of each friction liner has a rolling surface for engagement with the corresponding side of the clutch disc, such that the pad concerned is able to tilt with respect to the clutch plate.

Abstract: It is a matter of a variable speed drive pulley with which is associated a regulating chamber adapted to be connected to a source of fluid, this regulating chamber being sealed in particular by a seal which, coupled axially to the mobile flange, is disposed in line with an abutment spacer also defining one of the extreme positions of the mobile flange. The abutment spacer is carried by the bush of the mobile flange on the side of the bush facing the other flange, it features a transverse collar which is directed radially towards the axis of the assembly and by which it delimits, for its part, a housing in which is disposed the associated seal and, conjointly, passages are provided in a generally radial direction in said bush and the hub of the assembly.