Abstract: A damper pulley assembly has a hub; a seismic mass connected to the hub to define a dynamic torsional vibration damper; a pulley connected to the hub; elastic means for connecting the pulley in torque-transmitting mode to the hub; and one-way stop means for arresting the pulley in a first stop position with respect to the hub or the seismic mass in a first direction, when the elastic means reach a predetermined torsional load.

Abstract: A pulley assembly for a flexible motor vehicle transmission, comprising a supporting member rotatable about an axis, a pulley adapted to cooperate with a belt and connected to the supporting member to be rotatable about said axis with respect to the supporting member, elastic spiral means interposed between the supporting element and the pulley and comprising a sliding portion elastically loaded in radial direction against a sliding wall carried by one of either the supporting members or the pulley for tangential force drive coupling pulley to the supporting member. In particular, the elastic spiral means comprise a supporting element and sliding portion comprising at least one runner carried by the supporting element and sliding along the sliding walls.

Abstract: A pulley assembly for flexible motor vehicle transmission, comprising a supporting member rotatable about an axis, a pulley adapted to cooperate with a belt and connected to the supporting member to be rotatable about said axis with respect to the supporting member, a spiral spring interposed between the supporting element and the pulley and comprising a sliding portion elastically loaded in radial direction against a sliding wall carried by one of either the supporting members or the pulley for coupling by a tangential force transmission the hub to the supporting member. In particular, the sliding portion defines a first contact zone and a second contact zone in which is concentrated the contact pressure exchanged between the sliding portion and the sliding wall, the first and second contact zone being reciprocally and angularly distanced.

Abstract: Described herein is a pulley assembly for a start-stop belt drive, comprising a hub having an axis and designed to be connected to a crankshaft of an internal-combustion engine, a pulley, which is designed to co-operate with a belt of a belt drive and is connected in a rotatable way on the hub, and a seismic mass, which is connected to the hub so as to rotate with respect to the hub so as to define a damping device for damping torsional vibrations. The pulley assembly comprises a band clutch co-operating selectively between the hub and the pulley and comprising a coil element and electromagnetic actuation means for governing clutching and de-clutching of the coil element.

Abstract: Described herein is a pulley assembly for a start-stop belt drive, comprising a hub having an axis and designed to be connected to a crankshaft of an internal-combustion engine, a pulley, which is designed to co-operate with a belt of a belt drive and is connected in a rotatable way on the hub, and a seismic mass, which is connected to the hub so as to rotate with respect to the hub so as to define a damping device for damping torsional vibrations. The pulley assembly comprises a band clutch co-operating selectively between the hub and the pulley and comprising a coil element and electromagnetic actuation means for governing clutching and de-clutching of the coil element.

Abstract: A damper pulley assembly has a hub; a seismic mass connected to the hub to define a dynamic torsional vibration damper; a pulley connected to the hub; elastic means for connecting the pulley in torque-transmitting mode to the hub; and one-way stop means for arresting the pulley in a first stop position with respect to the hub or the seismic mass in a first direction, when the elastic means reach a predetermined torsional load.

Abstract: A pulley assembly for a flexible motor vehicle transmission, comprising a supporting member rotatable about an axis, a pulley adapted to cooperate with a belt and connected to the supporting member to be rotatable about said axis with respect to the supporting member, elastic spiral means interposed between the supporting element and the pulley and comprising a sliding portion elastically loaded in radial direction against a sliding wall carried by one of either the supporting members or the pulley for tangential force drive coupling pulley to the supporting member. In particular, the elastic spiral means comprise a supporting element and sliding portion comprising at least one runner carried by the supporting element and sliding along the sliding walls.

Abstract: A pulley assembly for flexible motor vehicle transmission, comprising a supporting member rotatable about an axis, a pulley adapted to cooperate with a belt and connected to the supporting member to be rotatable about said axis with respect to the supporting member, a spiral spring interposed between the supporting element and the pulley and comprising a sliding portion elastically loaded in radial direction against a sliding wall carried by one of either the supporting members or the pulley for coupling by a tangential force transmission the hub to the supporting member. In particular, the sliding portion defines a first contact zone and a second contact zone in which is concentrated the contact pressure exchanged between the sliding portion and the sliding wall, the first and second contact zone being reciprocally and angularly distanced.

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 device for driving a piece of equipment from a driving shaft has a torsional vibration damper and comprises a primary element for connection to the driving shaft and a secondary element for connection to the piece of equipment. A first elastic member surrounds the primary element and an inertia ring surrounds the first elastic member. The secondary element has a rim extending parallel to the longitudinal axis of the device, and the rim partly covers the inertia ring. A cylindrical ring is located between the rim and the inertia ring for providing friction and a radial guide bearing. The secondary element has a transverse covering integral with the rim extending radially inwardly toward the longitudinal axis of the driving shaft. A second elastic member is located between the transverse covering and the primary element.