Abstract: Described is a generator for an engine-driven power system. The generator having a generator shaft, a sleeve coupler, a first pulley, and a second pulley. The generator shaft, which is shaped at an end to define a first tapered surface, rotates a rotor relative to a stator. The sleeve coupler is shaped to define a bore with a second tapered surface. The bore receives the end of the generator shaft. The first pulley has a center hole to receive the sleeve coupler. The second pulley shares an axis of rotation with the first pulley and transfers a rotational force to the generator shaft and to the sleeve coupler.

Abstract: A continuously variable transmission driven pulley movable sheave comprising a beveled face disk, an elongated hollow cylindrical collar extending orthogonally from a center of the beveled face disk, and a triangular shaped tuning pocket disposed in the collar. The tuning pocket is structured and operable to control axial movement of the movable sheave on the elongated neck of the driven pulley. The tuning pocket comprises a first gear side, an acceleration side disposed at a positive angle relative to a reference point on the first gear side, and a deceleration side disposed at a negative angle relative to the reference point on the first gear side.

Abstract: Described is a generator for an engine-driven power system. The generator having a generator shaft, a sleeve coupler, a first pulley, and a second pulley. The generator shaft, which is shaped at an end to define a first tapered surface, rotates a rotor relative to a stator. The sleeve coupler is shaped to define a bore with a second tapered surface. The bore receives the end of the generator shaft. The first pulley has a center hole to receive the sleeve coupler. The second pulley shares an axis of rotation with the first pulley and transfers a rotational force to the generator shaft and to the sleeve coupler.

Abstract: A continuously variable transmission device (1) for a two-wheel, three-wheel or four-wheel motorcycle includes a cam system (20, 22; 32a, 32b) operating between a fixed bushing (11) and a mobile bushing (9). The device is configured to obstruct the approach between the active surfaces (8a, 10a) or to facilitate the approach of the active surfaces.

Abstract: A drive pulley for a CVT has a fixed sheave, a movable sheave, a spider, a biasing member biasing the movable sheave axially away from the fixed sheave, at least one centrifugal actuator and at least one slider assembly. The at least one slider assembly has a slider block connected to one of the movable sheave and the spider and abutting another one of the movable sheave and the spider. The slider block slides along the other one of the movable sheave and the spider as the movable sheave moves axially. The at least one slider assembly transfers torque between the movable sheave and the spider. A slider block for a drive pulley of a CVT is also described.

Abstract: A CVT transmission device (1) comprises a drive pulley (4) provided with a mobile bushing (9), a fixed bushing (11), a cam system (95,111; 97,113) comprising at least one driven cam portion (95) of mobile bushing (9) and a cam portion (111) of the fixed bushing (11). The mobile bushing (9) comprises a main wall (91) annular with respect to the axis of rotation (X), having an inner surface (91a) which delimits a housing compartment (91c) and said driven cam portion (95) protrudes radially internally from said inner surface (91a). The drive cam portion (111) of the fixed bushing (11) is suitable to penetrate axially in said housing compartment of the mobile bushing (9).

Abstract: An agricultural machine includes at least one processing device for harvested material and a drive train for the at least one processing device. The drive train has an output transmission stage with an output shaft for the at least one processing device. The output transmission stage includes an input gear and a grooved shaft connected in a non-rotatable manner to the input gear and the output shaft in such a manner that a drive connection between the input gear and the output shaft is achieved via the grooved shaft. The grooved shaft is provided with a ring groove defining a predetermined breaking point. The ring groove is configured in the drive flow direction between the input gear and the output shaft, and the grooved shaft is accessible through an assembly opening on an input gear side of the grooved shaft. The assembly opening is axially aligned with the grooved shaft.

Abstract: A pulley for a continuously variable transmission (CVT) and a method of controlling the pulley. The pulley has a main shaft, a fixed sheave, a mobile sheave and a cam system. The fixed sheave is fixedly mounted on the main shaft and has a fixed belt groove portion. The mobile sheave is movably mounted on the main shaft and has a mobile belt groove portion, the mobile sheave is mounted on the main shaft such that the fixed belt groove portion and the mobile belt groove portion form a riding path for a drive belt and is axially movable with respect to the main shaft such as to vary an effective diameter of the pulley by increasing or decreasing an axial space between the mobile sheave and the fixed sheave. The cam system is mounted at one end via a bearing fitted around the primary shaft to the mobile sheave. The cam system is adapted to provide an axial movement to the mobile sheave in order to increase or decrease the axial space between the mobile sheave and the fixed sheave.

Abstract: A harvester reciprocating drive balancing system may include a crop material separating member movably supported for reciprocal movement and a drive operably coupled to the crop material separating member to reciprocate the crop material separating member. The drive may include a drive crank operably coupled to the crop material separating member, a shaft operably coupled to the drive crank, a belt drive, a driven pulley, a belt wrapped about the belt drive and the driven pulley and a gear reduction mechanism operably coupled between the driven pulley and the shaft.

Abstract: A continuously variable transmission includes two pulleys (1, 2), each with two pulley discs (4, 5) that are mutually oriented at a pulley angle (?p-i; ?p-o), and a drive belt (3) with an endless carrier (31) and with a number of transverse members (32) that each arrive in contact with the pulley discs (4, 5) via contact faces thereof that are mutually oriented at a belt angle (?b). The pulley angle (?p-i) of one (1) of the transmission pulleys (1, 2) is set smaller than the pulley angle (?p-o) of the other one (2) of the transmission pulleys (1, 2) and the belt angle (?b) is set essentially equal to the larger pulley angle (?p-o) of the other one pulley (2). This transmission is capable of transmitting a particularly high driving power with a particularly high efficiency.

Abstract: A variable-speed belt drive includes at least: two substantially parallel shafts; two variably interspaced flange pulleys, one driving, the other driven, each carried by a shaft and interconnected by the belt, the flanges of the driving pulley being movably mounted in a variably interspaced manner via a speed variation device including control elements for bringing the flanges of the driving pulley closer together, and control assisting elements including a cam formed by two coaxial plates having sliding-contact inclined ramps, one plate being rotatably fixed to the movable flange of the driving pulley, the other being rotatably fixed to the shaft carrying the driving pulley, the distance between the plates becoming wider in the direction of the flanges of the driving pulley coming together under the effect of the transmitted torque; and elements formed by a simple spring for recalling the flanges of the driven pulley in the close position.

Abstract: A drive pulley for a CVT has a fixed sheave, a fixed sheave shaft fixedly connected to the fixed sheave, a movable sheave, a movable sheave shaft fixedly connected to the movable sheave, a spider and at least one centrifugal actuator. The fixed sheave shaft is disposed at least in part inside the movable sheave shaft. The movable sheave is disposed axially between the spider and the fixed sheave. A biasing member biases the movable sheave axially away from the fixed sheave. A torque transfer assembly is operatively connected to at least one of the fixed sheave and the movable sheave. The torque transfer assembly transfers torque between the fixed sheave and the movable sheave. The biasing member, the at least one centrifugal actuator and the torque transfer assembly are disposed radially outward of the fixed and movable sheave shafts.

Abstract: A torque cam device includes: a drive cam member; a driven cam member; and an intermediate cam member which includes a second drive cam surface that is formed on one end, and that is arranged to be abutted on the first drive cam surface, a second driven cam surface that is formed on the other end, and that is arranged to be abutted on the first driven cam surface, and which is arranged to be rotated relative to the driven cam member and the driven cam member, the first and second drive cam surfaces being abutted on each other when a power is transmitted from the drive cam member to the driven cam member, the first and second driven cam surfaces being abutted on each other when the power is transmitted from the driven cam member to the drive cam member.

Abstract: A variable transmission includes driving and driven cone discs respectively having two movable and pressing cone discs; a pressing mechanism having an end surface cam pressing mechanism arranged on the back of one pressing cone disc of the driving and driven pressing cone discs; a ratio control mechanism having a ratio control shaft, hollow screws and nuts, arranged on the backs of the driving and driven movable cone discs and adopt ball screw structures or sliding screw structures; the ratio control shaft and a constant ratio transmission mechanism enable the conversion relationships between the rotation of the speed control shaft and the axial sliding of the driving and driven movable cone discs are be equal to each other to ensure the transmission shafts of the driving and driven movable cone discs move axially and synchronously at the same speed and in the same direction.

Abstract: A drive pulley for a CVT has a fixed sheave, a movable sheave, a spider, a biasing member biasing the movable sheave axially away from the fixed sheave, at least one centrifugal actuator and first and second rollers rotationally connected to one of the movable sheave and the spider. The first roller rolls along the other one of the movable sheave and the spider as the movable sheave moves axially. The second roller rolls along the other one of the movable sheave and the spider as the movable sheave moves axially. The first and second rollers transfer torque between the movable sheave and the spider.

Abstract: A belt-driven continuously variable transmission adapted to prevent an occurrence of belt slippage is provided. The continuously variable transmission comprises a hydraulic actuator formed on a back side of a movable sheave to change a belt groove between a fixed sheave and a movable sheave, and a torque cam assembly adapted to convert a torque into an axial thrust force by a relative rotation between a pair of cam members contacted to each other. In the belt-driven continuously variable transmission, a piston fitted onto a shaft of the driven pulley while allowing to rotate relatively therewith and to reciprocate thereon is integrated with one of the cam members of driven side and with an output gear for outputting torque of the pulley. The cam member of drive side is fixed in an axial direction on a driven shaft to be rotated integrally therewith.

Abstract: A variable-speed belt drive includes at least: two shafts that can be positioned in a substantially parallel manner; two variably interspaced flange pulleys, one driving, the other driven, one carried by one, the other by the other of the shafts, the pulleys being interconnected by the belt; a speed-variation device controlled by the action of the flanges of the driving pulley being brought together or interspaced; and elements for recalling the flanges in a close position. The speed-variation device is manually controlled and the shaft of the driven pulley is provided with at least one idler member having an outer peripheral surface mounted on the shaft in a freely rotating manner, and around which the belt can wind at least partially in the interspaced position of the flanges of the driven pulley, corresponding to the position with the smallest diameter for the winding of the belt around the shaft.

Abstract: A drive pulley for a CVT has a fixed sheave, a movable sheave, a spider, a biasing member biasing the movable sheave axially away from the fixed sheave, at least one centrifugal actuator and at least one roller assembly. The at least one roller assembly has first and second rollers rotationally connected to one of the movable sheave and the spider and abutting another one of the movable sheave and the spider, the first roller rolling along the other one of the movable sheave and the spider as the movable sheave moves axially, the second roller rolling along the other one of the movable sheave and the spider as the movable sheave moves axially. The first and second rollers transfer torque between the movable sheave and the spider.

Abstract: A belt tension adjustment apparatus for vehicles, including a rotational shaft of a rotor; a first coupling pin and a second coupling pin protruding in a direction perpendicular to the rotational shaft; an outer pulley penetrating the rotational shaft and having a first coupling part extending toward a front direction, the first coupling part enclosing the rotational shaft and having a first slit penetrating at a point corresponding to the first coupling pin, and the first slit having an arc shape convex in the front direction. An inner pulley is disposed between the rotor and the outer pulley, to penetrate the rotational shaft, and has a second coupling part extending in a rear direction. The second coupling part encloses the rotational shaft and has a second slit penetrating at a point corresponding to the second coupling pin. The second slit has an arc shape convex in the rear direction.

Abstract: A belt-driven continuously variable transmission having a downsized torque cam assembly for creating forward thrust to push a movable sheave toward a fixed sheave. The belt-driven continuously variable transmission is adapted to output a torque while changing a speed ratio continuously by altering an effective diameter position of a driving belt.

Abstract: A belt-type stepless transmission is provided with: an input shaft; an input pulley having a stationary sheave and a movable sheave; a transmission shaft disposed parallel to the input shaft; an output pulley having a stationary sheave and a movable sheave; a belt wound around the input pulley and the pulley; an output shaft disposed coaxially with the transmission shaft; and a cam mechanism having a sheave-side cam which is provided and affixed to the movable sheave and a shaft-side cam which is provided and affixed to the output shaft and causing the sheave-side cam and the shaft-side cam to make contact with each other to thereby enable the transmission of torque between the movable sheave and the output shaft and apply an axial pressing force corresponding to the torque to the movable sheave.

Abstract: A driven clutch for continuously variable transmission for a vehicle, the driven clutch permitting engine braking. The clutch includes an output shaft with first and second sheaves. The first sheave is substantially inhibited from moving axially along the output shaft but may be relatively unrestrained rotationally. The second sheave is axially and rotationally movable with respect to the shaft. A slot is formed in the output shaft and adapted to engage with second sheave for providing torque transmission between the second sheave and the output shall. A compression spring is disposed between the helix and the second sheave for biasing the second sheave toward the first sheave.

Abstract: The driven pulley is part of a continuously-variable transmission (CVT). The driven pulley comprises two coaxially-disposed sheaves defining between them a belt-receiving groove. It also has at least two axisymmetric ramp surfaces attached to one of the sheaves and at least two axisymmetric followers attached to the other sheave, each ramp surface being engageable by a corresponding one of the followers. At least some of the ramp surfaces are provided on corresponding ramp holders that are independent from the sheaves. A method of modifying the settings of a driven pulley and a method of assembling a driven pulley also disclosed.

Abstract: A continuous variable clutch is provided. The continuous variable clutch includes a first sheave member and a second sheave member. The first sheave member includes a first central hub and a first conical-faced surface extending radially from the first central hub. The second sheave member includes a second central hub and a second conical-faced surface that extends radially from the second central hub. The second central hub of the second sheave member is received in a cavity of the first central hub such that the first conical-faced surface of the first sheave member facing the second conical-faced surface of the second sheave portion. The second central hub moving axially within the first central hub based on an amount of torque on the continuous variable clutch. The first sheave member and the second sheave member further forming a central passage to receive an input shaft of a transmission.

Abstract: A variable-speed drive unit, in particular for a variable-speed drive device, such as a riding mower, includes at least one belt transmission between two pulleys, each mounted on a shaft, each pulley including variably-spaced flanges. In this variable-speed drive unit, each pulley has a flange that equipped with a loading device that tends to exert, in a permanent manner and in the active state of the transmission, an axial effort in the direction in which the flanges move toward the pulley to clamp the belt between the flanges, whereby one of the pulleys has a loading device that exerts a lesser axial effort than the other device, and whereby one of the pulleys also includes, independently of the loading device, a manual control element for drawing together or separating flanges that can exert on the flange a slight control effort corresponding essentially to the power difference of the loading devices.

Abstract: A generator system includes a prime mover having a drive shaft and a throttle, a driven member having a rotor disposed on a rotor shaft, and a continuously variable transmission pulley system. The transmission pulley system includes a drive pulley coupled to the drive shaft and having a variable drive pulley effective diameter. A driven pulley coupled to the rotor shaft has a variable driven pulley effective diameter responsive to varying torque on the rotor shaft. A belt configured to engage the drive pulley and the driven pulley has a belt tension, wherein the drive pulley effective diameter varies in response to the belt tension.

Abstract: Methods and devices for tailoring the functional relationship between the shift ratio of a CVT and the radial force (FR) into the cam surfaces of a CVT's helix. Such tailoring may effect downshifting, and the separation of the design of the upshift function from the design of the backshift function. Such tailoring may be effected by schemes that include the use of a helix with other than a constant distance from the rotational axis to the touch point (touch-point radius), a touch-point radius that is a monotonic function of the shift ratio, or a touch-point radius that is a meandering function of the shift ratio.

Abstract: Pulley assembly for a continuously-variable vehicle transmission, comprising a support element having an axis, a first half-pulley rotationally connected to the support element, a second half-pulley facing the first half-pulley to define a seating adapted to house a drive belt, the second half-pulley being axially and circumferentially mobile in relation to the support element, and cam means functionally inserted between the second half-pulley and the support element to control the position of the second half-pulley. The cam means define a plurality of circumferential cavities carried by a peripheral portion of the second half-pulley, said cavities being defined by the first and second sides which are transverse to axis, and comprise a plurality of cam-followers which are connected to the support element and housed in the corresponding circumferential cavities to cooperate selectively with the first and second sides.

Abstract: A belt-type continuously variable transmission (CVT) with reduced vibration at high engine speeds. A secondary sheave includes a fixed sheave member, a moving sheave member, a compression coil spring, and an outside spring guide. The compression coil spring urges the moving sheave member toward the fixed sheave member. The outside spring guide prevents the compression coil spring from buckling during compression.

Abstract: A simplified continuously variable transmission system control provides a variable clamping force and a differential cylinder pressure manipulation to change sheave ratios. The system control uses two pumps. The first pump provides the variable clamping force. The second pump provides pressure changes to effect ratio changes. The clamping force can be varied based upon operator demand on an associated engine.

Abstract: A stable and play-free pivot connection of a bicycle derailleur between a parallelogram link and either a base member or a chain cage. The pivot points are formed with first and second bushings that are arranged as far from one another as possible. The parts are connected by pivot pins having a anti-rotation contour for preventing rotation of the pin within an inner pivot part. The axial displacement of the pivot pin is prevented by a securing element or by a deforming element engaging a holding contour on the pivot pin. One of the first and second bushings is protected and arranged in a blind hole and the other of the first and second bushings is covered on the outside by a pin head of the pivot pin.

Abstract: Methods are disclosed for controlling a variable-speed transmission utilizing a pulley structure including first and second pulley members coupled for free rotation together about a shaft. The second pulley member can be axially movable relative to the first pulley member, and can include a pulley contact surface disposed generally opposite to the first pulley member. A coupling member is provided for communicating with the shaft to rotatably drive the shaft. The coupling member includes a coupling member contact surface disposed for selective frictional engagement by the pulley contact surface. Torque can be selectively coupled and decoupled to a transmission, as well as vary a speed of the transmission.

Abstract: A control device includes an arrangement for deriving an input torque input to a belt-type continuously variable transmission based on a control amount of a first actuator. The continuously variable transmission includes a first actuator that is provided on a one movable sheave side, that presses the one movable sheave toward one fixed sheave, and that can generate a belt pinching pressure on the one movable sheave side, and a second actuator and a torque cam that are provided on the other movable sheave side, that press the other movable sheave toward the other fixed sheave, and that can generate a belt pinching pressure on the other movable sheave side.

Abstract: The driven pulley (10) comprises a first sheave (12) and a second sheave (40) coaxially mounted around a main shaft. The first sheave (12) is fixed with reference to the main shaft while the other sheave (40) is allowed to slide and rotate with reference to the main shaft. The driven pulley (10) is designed with a roller mounting unit (74) facilitating the assembling or the replacement of the rollers (70).

Abstract: In a V-belt continuously variable transmission (CVT) of an ATV, a movable sheave half of a primary sheave is disposed on the outer side in the vehicle width direction with respect to a fixed sheave half, and a sheave drive mechanism for controlling the respective groove widths of the primary sheave and a secondary sheave through a driving force by an electric motor is located on the outer side in the vehicle width direction with respect to the movable sheave half of the primary sheave. A footboard of the ATV is located on the outer side of the V-belt CVT in the vehicle width direction and below a primary sheave shaft and a secondary sheave shaft. A portion of the electric motor is located above and in front of the primary sheave shaft as viewed in the sheave shaft direction. A straddle-type vehicle having the compact, yet durable V-belt continuously variable transmission achieves a speed change operation highly responsive to the vehicle running condition.

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: Apparatuses and methods are disclosed for controlling a variable speed transmission including an actuator, a cam follower, and a speed adjustment cam. The actuator is rotatable through a first phase and a subsequent second phase, and includes an actuator cam surface and a variator. The cam follower is movable in response to contact with the actuator cam surface during rotation through the first phase, for actuating a coupler of the transmission between a disengaged position and an engaged position. The variator is movable along the speed adjustment cam during rotation through the second phase for enabling adjustment of a torque transfer mechanism associated with the transmission. By this configuration, control over the coupling of the transmission to a torque input such as a motor and control over the speed of the transmission are both enabled through rotation of a single actuator, and thus can be implemented in a self-propelled machine such as a lawnmower using a single operator-manipulated control.

Abstract: A stationary sheave half of a V-belt type continuously variable transmission (CVT) comprises a primary sheave mounted to a primary sheave shaft and a secondary sheave mounted to a secondary sheave shaft. The stationary sheave half of the secondary sheave comprises a sheave body, which is substantially in the form of a doughnut plate and around which a V-belt is wound, and a substantially cylindrical-shaped boss portion extending rightward from a right side of the sheave body. The sheave body and the boss portion are formed separately.

Abstract: A variable speed transmission of the continuously variable type. The transmission includes an input pulley having primary and secondary sheaves and an output pulley having primary and secondary sheaves. The primary and secondary sheaves of the input pulley are mounted on a first axle shaft carried by an actuator plate and the primary and secondary sheaves of the output pulley are carried on a second axle shaft carried by the actuator plate. The input shaft of the transmission carries pin mounted roller bearings which are received in skewed slots in an actuator sleeve so that the actuator sleeve is moved axially along the input shaft in response to variations in torque loading. The actuator plate is annular and includes a central circumferential groove receiving pin mounted roller bearings carried by the actuator sleeve so that the actuator plate, and the axle shafts carried thereby, undergoes the same axial movement as the actuator sleeve in response to variations in torque loading.

Abstract: A continuously variable transmission driven-pulley cam having a third cam surface which decreases the travel distance of the roller preventing the drive belt from dropping to a lower radius, thus preventing the transmission from going into a higher gear ratio upon inversion of torque transmitted to the driven pulley. The cam further includes a locking surface which prevents the roller from travelling axially to the cam, thus prevents the inner sheave from moving away from the outer sheave when the driven pulley is operating in the reverse direction. A continuously variable transmission driven-pulley cam roller assembly includes an inner roller and an outer roller wherein the diameters of the inner and outer rollers are different.

Abstract: A torque sensing assembly includes an axially fixed sheave having an axis of rotation, and an axially movable sheave movable along the axis in relation to the axially fixed sheave. A compression spring has a first end and a second end, with the first end being positioned to engage the axially movable sheave. A dual stage spring compression mechanism has a spring retainer that engages the second end of the compression spring. The dual stage spring compression mechanism is connected to the axially fixed sheave. The dual stage spring compression mechanism has a first stage compression device that compresses the compression spring by a first preload amount and a second stage compression device that compresses the compression spring by a second preload amount.

Abstract: Pulley assembly for a continuously-variable vehicle transmission, comprising a support element having an axis, a first half-pulley rotationally connected to the support element, a second half-pulley facing the first half-pulley to define a seating adapted to house a drive belt, the second half-pulley being axially and circumferentially mobile in relation to the support element, and cam means functionally inserted between the second half-pulley and the support element to control the position of the second half-pulley. The cam means define a plurality of circumferential cavities carried by a peripheral portion of the second half-pulley, said cavities being defined by the first and second sides which are transverse to axis, and comprise a plurality of cam-followers which are connected to the support element and housed in the corresponding circumferential cavities to cooperate selectively with the first and second sides.

Abstract: The driven pulley (10) comprises a first sheave (12) and a second sheave (40) coaxially mounted around a main shaft. The driven pulley (10) comprises an inverted cam plate (100) connected to the first sheave (12). The inverted cam plate (100) comprises ramps (104), each having a notch (108) to be engaged by projecting portions (106b) of corresponding followers (106). These parts are configured and disposed to prevent the driven pulley (10) from upshifting in a reverse mode.

Abstract: A belt drive includes first and second sheave halves disposed on a pinion that slide axially with respect to each other when a load on the v-belt increases or decreases but do not rotate with respect to each other.

Abstract: A power transmission device for utility machinery is disclosed, the device including: a) a sleeve supporting a first sheave member having a first face; b) a hub received through the sleeve and moveable axially in relation thereto, the hub supporting a second sheave member having a second face that opposes the first face such that the first and second faces define therebetween a groove adapted to receive a belt and relative axial movement between the sleeve and the hub being adapted to vary at least one of pitch diameter and grip imparted to the belt from the sheaves; and c) an actuator mechanism adapted, through control of relative axial displacement between the sleeve and the hub, to vary at least one of the pitch and grip, the actuator mechanism comprising a control rod disposed substantially perpendicularly to the line of action of the axial displacement and connected to the hub through a link mechanism, the control rod being adapted to rotate and the link mechanism being adapted to translate rotation of t

Abstract: Apparatuses and methods are disclosed for controlling a variable-speed transmission utilizing a pulley structure including first and second pulley members coupled for free rotation together about a shaft. The second pulley member can be axially movable relative to the first pulley member, and can include a pulley contact surface disposed generally opposite to the first pulley member. A coupling member is provided for communicating with the shaft to rotatably drive the shaft. The coupling member includes a coupling member contact surface disposed for selective frictional engagement by the pulley contact surface. Torque can be selectively coupled and decoupled to a transmission, as well as vary a speed of the transmission.

Abstract: A clutch for a belted transmission comprises a sheave, a first torque ramp member, a second torque ramp member, a drive ring and an electromagnet. The first torque ramp member is attached to the sheave and has a ramp face. The second torque ramp member is spaced apart from the first torque ramp member and has a ramp face opposing the ramp face of the first torque ramp. A drive ring is disposed between the first and second torque ramp members and has a button slider engaged between the ramp face of the first torque ramp member and the ramp face of the second torque ramp member. The electromagnet is configured for one of repelling the first torque ramp member from the second torque ramp member along a reference axis and attracting the first torque ramp member toward the second torque ramp member along the reference axis.

Abstract: A cone disc infinitely-variable gearbox including a shaft, a cone disc preferably embodied in one piece with the shaft, a cone disc connected to the shaft in a non-rotating axially-displaceable manner, a bearing ring axially fixed onto the shaft at a separation from the rear face of the displaceable cone disc, a radial inner pressure chamber formed between the cone disc and the bearing ring, which may be altered in the axial direction and which may be pressurized with pressure medium, through an opening embodied in the shaft, for displacement of the cone disc and a radial outer pressure chamber which may be altered in the axial direction and which may be pressurized with pressure medium, through a further opening embodied in the shaft, for displacement of the cone disc.

Abstract: A bidirectional continuous power transmission system, characterized by a projecting bolt moving within a guiding opening with a rear wall and a front wall. Upon a rotating movement, the projecting bolt exerts a force on the rear wall or the front wall, depending on the orientation of the rotating movement. The force has a component parallel to an axis of rotation, causing two halves of a driven wheel to be pressed together and against a transmission belt. By providing the rear wall and the front wall of the guiding opening with defined curvatures, well-defined forces are exerted at any speed in both orientations of the rotating movement, so that torque is continuously transmitted effectively in both directions.

Abstract: A pulley for a continuously-variable-ratio drive, having a fixed half-pulley fitted to a shaft of the drive; a movable half-pulley mounted to slide axially with respect to the fixed half-pulley to define with it a V groove of variable size for a V belt; and a torque-sensitive, axial thrust compensating device having an acceleration cam and a deceleration cam, which are interposed between the fixed half-pulley and the movable half-pulley to generate thrust on the movable half-pulley in the compression direction of the belt in response to both a drive torque and a braking torque.