Abstract: The member (3) is mounted on the shaft (2) which has two flat faces (7), by means of an outer ring arrangement (9) of needles parallel to the axis (X--X) of the shaft and rolling along two half-moon shaped members (8) which complete the circular section of the shaft. Each half-moon shaped member has a longitudinally extending groove (13) which receives a row of needles (12) which are perpendicular to the axis (X--X) and roll along a face (7) and are maintained by a cage (18). Two springs (21) re-center the cages (18) in the course of the sliding motion.

Abstract: The device allows the broaching of thin-walled workpieces with high precision and an excellent surface condition. It comprises mainly a fixed support defining a radial abutment surface, a sleeve defining ramps, wedge-shaped members bearing against said ramps and against the outer surface of the workpiece. These wedge-shaped members are carried by a plate which is capable of being brought to a wedging position under the effect of springs or to a disengaged position by means of ramps.

Abstract: In one embodiment the spring comprises a coil which extends through a coiling angle which is slightly less than 360.degree.. The end portions of the coil are curved in a direction for decreasing the pitch of the helix in the working position of the spring between two surfaces. This spring assumes such position that it comes in contact at two points with each of these surfaces and the forces are distributed in an excellent manner.Application in particular to the mounting of rollers on trunnions of homokinetic tripod joints.

Abstract: This transmission shaft comprises a first transmission element having high torsional elasticity which is rigidly connected to rotate at its ends with the output shaft of the engine unit of the vehicle and a front wheel, and a second transmission element having a low torsional elasticity coaxial with the first transmission element. The second transmission element has one end rigidly connected to rotate with the wheel and another end connected to the shaft through a connection which has an angular play between two predetermined values of the torque applied to the shaft. The drag torque applied to the shaft when the engine is idling and the vehicle is held stationary by the brakes, is between these two values.

Abstract: An intermediate bearing support mounting for a sectional drive line is disclosed. The intermediate bearing support includes a cushion housing with an antifriction bearing. A coupling part, which may be a coupling flange or a jaw of a universal joint having detachable bearing pads, is fitted in the antifriction bearing and has a splined cylindrical shank telescoping in an internally splined sleeve fixed on a tubular drive section. The coupling part has, opposite the cylindrical shank, a separable connection with another drive section of the drive line, which may either be a plate with a centering bearing surface and threaded fasteners or the jaw of a universal joint having detachable bearing pads. This arrangement reduces the overhang of the universal joint in relation to the bearing support.

Abstract: A device for mounting a vehicle wheel having a hub on a support has a roller bearing comprising two rows of rolling elements and an inner unit defining raceways for the rolling elements and defining at least one end face provided with frontal radiating splines, this unit consisting of a single ring which is axially clamped between two faces, of which one face is associated with the support and the other face pertains to the wheel hub splines being provided on the face of the hub which fit and engage these splines on the single ring.

Abstract: The method permits mass-producing axially retained tripod joints having high rigidity and a given prestressing force which is reproducible from one joint to another. According to this method, after having clipped a resiliently yieldable attachment onto a tulip-shaped element of the joint while the joint is in its assembled position, the value of the gap between the shoulder of a thrust member and a bearing surface of a hub carrying the trunnions is determined for the position of the joint in which the hub and tulip-shaped member are in alignment and the thrust member is axially shifted away from the hub and there is introduced in the gap produced between the thrust member and the hub a shim the thickness of which is chosen to be slightly larger than the gap.

Abstract: In the joint, the raceways of the tulip element have the shape of a torus. The ratio of the maximum distance between the axis of the tulip element and the axis of the tori defining the raceways to the radius of said tori is between 1/4 and 3/4. This results in a considerably improved mechanical efficiency and consequently in a reduced opposition to sliding.Application of the joint to automobile vehicle transmissions.

Abstract: The transmission comprises two slidable tripod joints. In each joint, the tulip element is extended around the shaft of the tripod element by an abutment member which defines a concave part-spherical surface. A check member having a convex part-spherical surface fitting the concave surface is disposed around the shaft between the tripod element and the abutment member with a radial clearance which is at least equal to the amplitude of the orbital movement of the tripod element at the maximum angle of deviation of the joint. Each joint has a spring which is compressed between the inner end of its tulip element and the adjacent end of the shaft. In this way, the maximum extension of the transmission is distributed equally between the two joints and the shaft is constantly centered so that noise and wear of the check members is avoided. The invention is in particular applicable to transmissions for independent rear driving wheels of automobile vehicles.

Abstract: The process comprises placing on the journal the roller provided with its needles and the annular member for axially retaining the needles. Thereafter, one end of an elastically yieldable ring is engaged in a passageway provided on the journal and the ring is shifted along this passageway until it is completely received in a groove. This method is much more reliable and lends itself to a thorough automatization.

Abstract: The device comprises a resilient fastener which has branches clipped on a first of the two elements of the homokinetic joint and serves to hold the second element of the joint assembled with the first element. One of the branches of the resilient member carries an adjustable abutment device which cooperates with a second abutment device on the first element. The fastener can be made to exert a prestressing force by adjustment of the adjustable abutment device. The adjustable abutment device may be a screw which is screwthreadedly engaged in a nut carried by the corresponding branch of the fastener and has an abutment surface which abuts an abutment surface formed on the first element.

Abstract: In this device, which is particularly, but not exclusively, suitable for transmissions for vehicles, an elastomer protecting gaiter comprises a body connected by a fold to a mounting flange and by another fold to a neck portion. The latter comprises a ring forming a bearing, an arrangement for mounting the neck portion in a support, and a sealing device. The body of the gaiter is preferably rigid.

Abstract: The object of this invention is to improve the performance of the tulip members in the regions of connection or attachment between the petal portions and the adjacent shaft, this result being obtained by simple means. For this purpose, whereas the rest of the member (the raceways, bottom, cavities for the attachment of members effecting an axial retention) is carburized or carbonitrided, the connection regions are substantially devoid of any carburizing or carbonitriding.

Abstract: The homokinetic transmission device is placed between a driving shaft and a driven shaft comprising two adjacent articulated joints. The articulated joints comprise a common intermediate member and are generally homokinetic and at least one of the joints is slidable. The arrangement of the two joints is adapted to permit a relative radial displacement between the two shafts. If h and l are the respective distances between the centers of the two adjacent tripod joints and the center of gravity of the transmission device interconnecting the two shafts, and .rho..sup.2 and Io/m, where Io represents the inertia of an intermediate member about an axis perpendicular to its general axis and to the direction of lateral displacement of said member and intersecting the center of gravity G, and where m represents the mass of the intermediate member, the following conditions are at least roughly satisfied:h.times.l=.rho..sup.2.

Abstract: The bearing comprises two rows of balls which circulate between two pairs of raceways. The raceways associated with each row of balls comprise two toric bearing surfaces which are substantially symmetrical with each other with respect to a plane perpendicular to the axis of rotation of the bearing. An elementary section of each of these bearing surfaces, in a plane containing the axis of the bearing, is at least substantially part-circular and has a radius slightly larger than the radius of the balls, and is substantially symmetrical with respect to a straight line parallel to the axis of the bearing and subtends a center angle exceeding about 120.degree.. The arrangement is such that the orientation of forces of contact and the location of zones of contact between the balls and the raceways vary in accordance with the direction of application of the load to which the bearing is subjected.

Abstract: The object of the invention is to improve the performance over a period of time and ensure a constant pre-stressing force of the axial retaining device for a tripod homokinetic joint. For this purpose, surfaces carried by the tulip member, which act as bearing surfaces for part-spherical surfaces carried by the tripod of the joint, comprise recesses of concave shape and of a radius of curvature which is slightly larger than the radius of curvature of the part-spherical bearing surfaces carried by the tripod.

Abstract: The torque transmitting connecting element, for example constituted by a flange, comprises a small number of pairs of bearing planes which are angularly spaced apart. The two planes of each pair are convergent in a direction away from the connecting face of the element and constitute the two flanks of a channel or of a projection which has a constant trapezoid cross-sectional shape which is symmetrical relative to a plane containing the axis of rotation of the element. Such elements, when they are interconnected in a torque-transmitting device, cooperate solely by their pairs of bearing planes. Bolts or a nut clamp these two elements together.The invention is for example applicable to automobile vehicle transmissions.

Abstract: The method permits mass-producing axially retained tripod joints having high rigidity and a given prestressing force which is reproducible from one joint to another. According to this method, after having clipped a resiliently yieldable attachment onto a tulip-shaped element of the joint while the joint is in its assembled position, the value of the gap between the shoulder of a thrust member and a bearing surface of a hub carrying the trunnions is determined for the position of the joint in which the hub and tulip-shaped member are in alignment and the thrust member is axially shifted away from the hub and there is introduced in the gap produced between the thrust member and the hub a shim the thickness of which is chosen to be slightly larger than the gap.

Abstract: Block bearings designed to equip the trunnions of the spider of the joint are provided for fixing by lugs to a flange of the joint mounted on a shaft to be coupled. They include drive tenons clampable in a corresponding groove formed in the contacting surface of the flange, as well as centering end pieces situated at the base of said tenons, towards the inside of the cardan joint. The improved joint finds application in transmissions through block bearings, in heavy vehicles.

Abstract: The two parts of the joint are axially retained by providing at least one intermediate element between the tripod element and the bell element of the joint. The intermediate element is connected to the bell element by a ball joint and allows a sliding of the tripod element in a direction perpendicular to the axis of the shaft rigid with the tripod element. This results in a longer life and an improved performance of the tripod joint.