Abstract: Actuator adapted to cooperate with a drive of an endothermic engine including power source and a releasable accessory, the actuator including a box-shaped casing, a motorized eccentric group housed inside the casing and including a reduction gearing, an arm cooperating with the eccentric group and supporting a friction wheel adapted to cooperate with the accessory and with the power source, the arm being mobile between an engaged position and a disengaged position of the accessory.

Abstract: In a belt drive of an internal combustion engine, a two-arm belt tensioner has a fixed tubular supporting portion; a first and a second arm fitted to the tubular supporting portion to rotate about a common hinge axis, and supporting respective idle wheels cooperating with respective branches of the drive belt; and an elastic device for forcing the arms towards each other; the elastic device having a torsionally elastic elongated member extending through the tubular supporting portion, coaxially with the hinge axis, and having respective opposite end portions projecting outwards of the tubular supporting portion; the end portions being fitted with respective end caps, one of which is fitted directly with one of the arms, and houses one end, connected integrally to the other cap, of the other arm.

Abstract: A tightener (1) cooperating with a belt in the presence of oil, and having a pin (2) having a first axis (A); a base plate (15) integral with and substantially perpendicular to the pin (2); a cam arm (3) connected in rotary manner to the pin (2) and movable with respect to the base plate (15); a contact member (5) carried by the cam arm (3); and an elastic member (4) connected to the cam arm (3) to activate the contact member (5) against the belt. The tightener (1) also has a friction member (16) made of oil-resistant material and axially supporting the cam arm (3) on the base plate (15); and axial elastic means (24) for loading the friction member (16) against the base plate (15).

Abstract: Poly-V belt, particularly for driving accessories of an internal combustion engine, comprising a cord realised from a yarn composed of a plurality of filaments by means of a first twisting in which are formed at least two plied yarns each composed of at least one yarn and a second twisting in which the plied yarns are twisted together to form the cord; the first twisting and the second twisting are made in opposite directions, and the numbers of twists per metre of the two twisting steps are calculated so that in the finished cord the filaments form with the axis of the cord an angle smaller than 3.3°.

Abstract: The present invention relates to an electrical motor reducer for operating an eccentric cam which adopts an epicyclic reducer housed inside the eccentric cam supporting pin, where is also provided a housing compartment for the electrical motor, whose pinion is perfectly coaxial with the axis of the epicyclic reducer and with the axis of said supporting pin.

Abstract: An integrated pulley-torsional damper assembly (1) comprises a hub (2) designed for being rigidly connected to a drive member (3), a pulley (4) connected to the hub (2) by means of a first ring (5) made of elastomeric material having the function of filter for the torsional oscillations, and an inertia ring (6), connected to the hub (2) by means of a second ring (7) made of elastomeric material, which defines with the inertia ring (6) a damping system. The first elastomeric ring is connected to the hub by mans of a coupling flange (25), which can be pack-tightened between an internal annular flange (10) of the hub and the drive member (3), the hub (2) comprising a first cylindrical wall (11) and a second cylindrical wall (12), which are coaxial with respect to one another and define between them an annular cavity (9) housing the first elastomeric ring (5), the external cylindrical wall (12) defining a support for the second elastomeric ring (7).

Abstract: A pulley for a continuously variable transmission is provided with a fixed half-pulley fitted on a supporting shaft and a mobile half-pulley, which is able to slide towards the fixed half-pulley under the thrust of a spring, so as to define a V-shaped race of variable amplitude. The pulley is further provided with a device for compensating the axial thrust, said device being constituted by a cam and a cam follower, which are coupled in contact with one another to impart an additional axial thrust on the mobile half-pulley in response to a torque acting on the pulley. The cam is defined by a tubular body made of plastic material co-moulded on the supporting shaft, whilst the cam follower is made of a single piece with the mobile half-pulley.

Abstract: A toothed belt comprising a body made of elastomeric material, embedded in which is a plurality of longitudinal filiform resistant inserts, and comprising a toothging coated with a coating fabric; on top of the coating fabric a resistant layer is made to adhere, which increases the resistance to wear of the toothed belt and which comprises a fluorine-based plastomer with elastomeric material added, in which the plastomer is present in an amount greater than that of the elastomeric material. Preferably, the plastomer is polytetrafluoroethylene, and the elastomeric material comprises HNBR. Advantageously, the resistant layer has a thickness of between 0.01 and 1.5 mm, and between the coating fabric and the resistant layer is set an adhesive material.

Abstract: A continuously-variable-ratio transmission belt includes a beltlike continuity element having a body made of elastomeric material and in turn having inner teeth and outer teeth and a number of threadlike longitudinal inserts embedded inside the body; and a number of separate friction blocks which are made of plastic material, are co-molded onto the continuity element so as to each incorporate one tooth of the inner teeth and one tooth of the outer teeth, and are each defined by two lateral surfaces converging inwards of the belt and cooperating with respective sides of a groove of a trapezoidal-grooved pulley.

Abstract: A toothed belt wherein the toothed portion is covered with a cover cloth consisting of a weft and a warp. The weft consists of weft yarns defined by an elastic core yarn and by at least one composite yarn wound about the elastic yarn; and each composite yarn comprises a high thermal and mechanical resistance yarn and at least one covering yarn wound about the high thermal and mechanical resistance yarn. To improve adhesion of the cloth to the elastomeric material of the belt body and teeth, to improve abrasion resistance and to extend the average working life of the belt, according to the present invention, the cloth is treated with an adhesive composition comprising resorcinol, formaldehyde, a highly saturated and carboxyl groups containing nitrile and conjugated diene copolymer latex, and epoxy resins.

Abstract: A multilayer pipe for conducting fuel, in particular from a vehicle pump to the engine, and which is capable of withstanding pressures of over 100 bar, is impermeable to hydrocarbon vapors, and includes at least one inner layer of elastomeric material, preferably acrylonitrile/butadiene and hydrogenated acrylonitrile/butadiene; a barrier layer having at least one polyamide, preferably nylon 6/6.6 or mixtures of nylon and polypropylene; a reinforcing layer defined by a spun fabric having aramidic fibers, preferably TWARON® or KEVLAR®; and a cover layer of elastomeric material, preferably chlorinated polyethylene.

Abstract: Toothed belt in which the toothed part is covered with a fabric consisting of a warp and a weft consisting of weft threads formed by an elastic thread, preferably made from polyurethane, acting as the core, and by at least a pair of composite threads wound on the elastic thread. Each composite thread comprises a thread with high heat resistance and high strength, preferably made from para-aromatic polyamide, and a covering thread, preferably made from nylon, wound on the thread with high heat resistance and high strength. The structure of the weft of the toothed belt is such that each thread with high heat resistance and high strength can be completely isolated in such a way that it is not damaged by the friction of the belt against the teeth of the pulley, ensuring a greater durability of the belt. The structure with a pair of composite threads also makes it possible to increase the breaking load of the fabric.