Abstract: A mechanical rotary device for continuously variable transmission, the device comprising: a primary rotor adapted to transfer power from a rotary power source to an output shaft; a central rotating member comprising a first set of conical rollers operable by the first set of gears and a second set of conical rollers operatively connected to a second set of gears, mounted in an opposite direction to the first set of conical rollers, axially around the primary rotor. The device further comprises a power transfer ring, adapted to move axially along both sets of conical rollers to transfer power from the first set of conical rollers to the second set of conical rollers, thereby varying the rotation of the output shaft.

Abstract: A friction ring-type transmission includes two roller bodies which are arranged at a distance from each other about a gap, which correspond to each other via the friction ring and which rotate (5) on axial roller body axes. The friction ring is arranged in an adjusting bridge in such a manner that it can be axially displaced about an adjusting path along the gap and the adjusting bridge is mounted by an individual, axial guiding device.

Abstract: A variable ratio gearbox is combined with a drive motor and an interactive control system. A coaxial shaft connects to a differential gear set to power an output shaft. The transmission has a drive shaft with an inner shaft and an outer shaft. A friction disk nonrotatably mounts to said outer shaft and a shifter connected to the friction disk moves the friction disk along the outer shaft. At least two cones engage the periphery of the friction disk and a differential gear set combines the rotation of the inner and outer shaft.

Abstract: The aim of the invention is to further develop a bevel friction ring gearing. The invention thus relates to a bevel friction ring gearing in which the friction ring can be displaced by means of an adjusting device that comprises a guide on which an adjusting bridge for the friction ring is arranged in a free axially displaceable manner. The adjusting device comprises a worm-gear drive that engages with the guide.

Abstract: In order to be able to build conical-friction-ring transmissions more compactly, the invention proposes a conical-friction-ring transmission having a first friction cone, having a second friction cone, having a friction ring, and having at least one other transmission element, in which the first friction cone is mounted to rotate about a first friction-cone bearing axis by means of first friction-cone bearings, and the second friction cone is mounted to rotate about a second friction-cone bearing axis by means of second friction-cone bearings, in which the two friction cones are disposed tensioned relative to one another by means of the friction ring, in which main bearing forces that act radially, with regard to the friction-cone bearing axes, extend in a main bearing plane spanned by the two friction-cone bearing axes, in which the at least one other transmission element precedes or follows the friction cones, and in which coupling moments can be in effect between one of the friction cones and the at least

Abstract: A traction drive type continuously variable transmission, comprising a first input/output shaft (6) rotatably supported on a casing (10), a second input/output shaft (7) rotatably supported on the casing (10), a V-pulley (4) supported on the first input/output shaft (6) and having a pair of pulley members forming a V-groove with variable grove width, a ring (3) engaged with the V-pulley (4) and supported at the outer periphery thereof, and a mechanism for moving the ring (3) to the periphery of the second input/output shaft (7).

Abstract: Two continuously variable transmission parts are connected to a common driven train through a pick-off gear so as to provide an entire continuously variable transmission operating with high efficiency even at high torques.

Abstract: The following steps are performed in the control method: determining a mode of operation from amongst a permanent mode and a transient mode, as a function of a set of variables comprising said estimated values; correcting the value of the speed of rotation of the outlet shaft in such a manner that: if the mode has been determined as being the permanent mode, then the moving average (L?) of the gear ratio (L) over a period (T) of a plurality of unit time intervals lies between a first threshold value (S1) that is negative and a second threshold value (S2) that is positive; and if the mode has been determined as being the transient mode, then said moving average (L?) of the gear ratio (L) lies outside the range of values defined by the first and second threshold value (S1, S2).

Abstract: A variable speed drive for a continuously variable transmission includes a first transmission element that is rotatable about a first rotational axis and has a convexly-curved transmission surface that is rotationally symmetrical about a first rotational axis. A second transmission element is rotatable about a second rotational axis and has a concavely-curved transmission surface that is rotationally symmetrical about a second rotational axis parallel to the first rotational axis. The curved transmission surfaces face each other and a rigid transmission ring is positioned between and in contact with the curved transmission surfaces to transmit torque therebetween. The position of the ring on the curved surfaces is adjustable to vary the transmission ratio. The transmission surfaces are parallel to each other at least within the adjustment range of the transmission ring.

Abstract: The aim of the invention is to further develop a friction ring-type transmission. According to the invention, a friction ring-type transmission comprises two roller bodies which are arranged at a distance from each other about a gap, which correspond to each other via the friction ring and which rotate (5) on axial roller body axes. According to the invention, the friction ring is arranged in an adjusting bridge in such a manner that it can be axially displaced about an adjusting path along the gap and the adjusting bridge is mounted by means of an individual, axial guiding device.

Abstract: A cone ring transmission, especially for motor vehicles with a front, transverse drive is proposed, having two cones in opposed alignment to one another, rotating on two shafts, the cones being, namely a primary cone and a secondary cone, with an adjustment ring engaging both cones therebetween, the ring contacting one cone and circumferentially encompassing the other cone, with a mechanism to provide ratio adjustment for the adjustment ring, having an arrangement which binds the output drive shaft, i.e. the shaft of the secondary cone with a differential of the motor vehicle and with a start-up element, which binds one of the cones with the motor of the motor vehicle, whereby the torque from the output drive shaft is transmitted to a differential by way of a gear train.

Abstract: In a conical friction ring gear having at least two conical friction wheels mounted on parallel axles and opposite one another, and a friction device effectively connecting both conical friction wheels, the risk of juddering is reduced when a torque acts on the friction device with a component which lies vertically on a plane set by both conical friction axles.

Abstract: Transmission with a ring or belt nipped between two rotating elements of which at least one is cone-shaped. The rotating elements have two parallel lines at their closest point. The ring encompasses one of the rotating elements and directly transfers the power from the drive to the driven element by means of friction. The ring remains in a plane orthogonal to the parallel lines on the rotating elements and that plane can shift to a new point along the parallel lines by a controlling mechanism which travels in back and forth on a line parallel to those parallel lines. Thus the ratio of the cross section of the two rotating elements changes and the device constitutes an infinite speed transmission. If one of the rotating elements is cylindrical instead of cone-shaped, there is the possibility of achieving better traction on the side of the ring which touches the cylinder through a wider contact surface or else through a geared tooth contact instead of a friction contact.

Abstract: A friction cone gearing assembly for transmitting power from a driving unit to a driven unit includes a housing, a friction cone gearing comprised of first and second bevel wheels rotatable about parallel rotational axes and having same taper angles, and a friction ring operatively engaged with the bevel wheels and encircling one of the bevel wheels, with the friction ring being guided along a generatrix of both bevel wheels, whereby the friction cone gearing is so positioned in a compartment of the housing as to be separated from the driving unit and driven unit.

Abstract: A continuously adjustable transmission has two sets of cone pulleys disposed concentrically with respect to each other on a transmission input shaft. Between the two sets of cone pulleys a rigid ring acts as a torque transmitting member for transmitting torque from one set of cone pulleys to the other. This arrangement provides a compact and lightweight transmission producing the best transmission efficiency levels, especially at high and medium gear ratios.

Abstract: A friction cone gearing includes a housing, first and second bevel wheels received in the housing and rotatable about parallel rotational axes, with the bevel wheels having a same taper angle, a friction ring operatively engaged with the bevel wheels and encircling one of the bevel wheels, whereby the friction ring is guided along a generatrix of both bevel gears, and a cage for retaining the friction ring, with the cage being guided along the generatrix of both bevel gears and swingably mounted to the housing for pivoting about a pivot axis by means of a suitable drive mechanism.

Abstract: The present invention is a self-aligned continuously variable transmission between an input shaft having a first axis of rotation and an output shaft having a second axis of rotation which is parallel to the first axis of rotation. The CVT comprises a first set of cones tapered in a first direction and a second set of cones tapered in a second direction opposite to the first direction. Each cone of the first and second sets of cones has an axis of rotation oriented such that a portion of a surface thereof is parallel to a portion of the surface of each of the other cones in the same set. A power transfer ring tractionally engages the first and second sets of cones on the parallel portions thereof to transfer power from said first set of cones to the second set of cones. The power transfer ring is movable axially of said first and second sets of cones along the parallel portions to vary the speed ratio from the first set of cones to the second set of cones.

Abstract: A variable-speed drive (1) having an input shaft (3), at least one output shaft (4), and a system (5) for connecting the input shaft (3) to the output shaft (4) and enabling the velocity ratio of the shafts (3, 4) to be varied continuously; which system is defined by a first truncated-cone-shaped rotary body (6) angularly secured to the output shaft (4) and defined laterally by a curved convex surface (7) having a given radius of curvature and by a number of second truncated-cone-shaped rotary bodies (8) angularly secured to the input shaft (3) and arranged in a ring about the first rotary body (6). Each second rotary body (8) is defined laterally by a curved concave surface (9) having a radius of curvature greater than that of the convex surface (7) defining the first rotary body (6).