Abstract: A drive sheave assembly of a continuously variable transmission is provided that includes a post, a fixed sheave, a movable sheave assembly, a sleeve and an engine braking assembly. The engine braking assembly includes an axial activation member, a one-way engagement member and a flange. The axial activation member is statically mounted within a central recess of the fixed sheave. The axial activation member is movably connected with the one-way engagement member. A central passage of the one-way engagement member is configured to engage a portion of the sleeve. The flange is coupled to the one-way engagement member to selectively engage a side of an endlessly looped member with axial movement of the one-way engagement member during an engine braking condition.

Abstract: A utility vehicle includes a plurality of ground-engaging members, a frame supported by the ground-engaging members, and a powertrain assembly. The powertrain assembly includes an engine, a shiftable transmission, a continuously variable transmission, and a charger. Additionally, the utility vehicle may include a cooling assembly fluidly coupled to at least the engine and the charger.

Abstract: A CVT clutch is provided. A fixed sheave of the CVT clutch is statically mounted on an end of the post. A movable sheave assembly is dynamically mounted on the post. The movable sheave includes a recess cavity that is defined by a movable sheave housing. A spider is statically mounted on the post within the recess cavity of the movable sheave assembly. At least one interchangeable ramp is positioned within the recess cavity so that at least one space is provided between the at least one interchangeable ramp and a sheave face of the movable sheave housing. An engagement member is positioned to engage an associated interchangeable ramp and the spider. A main bias member is configured to assert a bias force on the spider and cover to position each engagement member at a select location on the associated interchangeable ramp when a countering force is not present.

Abstract: Motor shaft adapters include a cylindrical shaft sleeve with a tubular body defined between inner and outer cylindrical surfaces, and frame adapters that include a section of structural tubing and flanges having sides aligned to the sides of the structural tubing section and fixed at respective ends of the section of structural tubing into assembly between a motor and gearhead. Key slot apertures are defined by opposing body end-walls of the tubular body and through the inner and outer cylindrical surfaces of the sleeve. A shaft key has outer sidewalls that include opposing outer sleeve aperture sidewall portions that enable the shaft key sidewall portions to fit within and to thereby engage the sleeve via the key slot aperture. The key sidewalls further include a base pair of opposing key seat engagement portions that fit within and engage opposing sidewalls of a key seat aperture defined within a workpiece shaft.

Abstract: A uniform clamp actuated shift infinitely variable transmission system is provided that includes a drive clutch and a driven clutch. Both the drive clutch and the driven clutch include torque sensitive assemblies. In particular, the drive clutch includes a drive torque sensitive assembly that is in operational communication with a movable drive sheave member of the drive clutch. The drive torque sensitive assembly is configured to move the movable drive sheave member in relation to a fixed drive sheave member based at least on torque applied to the drive torque sensitive assembly. The driven clutch includes a driven torque sensitive assembly that is in operational communication with a movable driven sheave member of the driven clutch. The driven torque sensitive assembly is configured to move the movable driven sheave member in relation to a fixed driven sheave member based at least on torque applied to the driven torque sensitive assembly.

Abstract: An automatic transmission is provided, which includes a variator having a first pulley, a second pulley and a belt wound around the first and second pulleys, a first motor configured to give a pulley thrust force for shifting the variator to the first or second pulley, a second motor configured to cause a belt clamping force to be generated in the variator, and a power transmission mechanism provided between the second motor and the variator, to transmit an output torque of the second motor to the variator. The power transmission mechanism includes a cycloid decelerator configured to decelerate an input torque from the second motor, and transmit the decelerated input torque to the variator.

Abstract: The driving pulley has a fully clutched mode of operation where a drivebelt and a driveshaft are coupled together in a torque transmitting engagement and also has an unclutched mode of operation where there is substantially no torque transmitting engagement between the drive belt and the driveshaft. The driving pulley comprises at least one transitional clutch spring that is in a first position when the driving pulley is in the unclutched mode of operation and that is in a second position when the driving pulley is in the fully clutched mode of operation. The at least one transitional clutch spring remains substantially in its second position regardless of the relative axial distance between the sheaves when the driving pulley is in the fully clutched mode of operation. A method of operating a driving pulley is also disclosed. The proposed concept provides a smoother engagement during the transition from the unclutched mode to the fully clutched mode.

Abstract: The present invention provides a driven-side pulley including a fixed sheave supported by a driven shaft that is relatively rotatable around an axis line and immovable along the axis line, a movable sheave supported by the driven shaft that is relatively rotatable around the axis line and movable along the axis line, a spider supported by the driven shaft that is relatively non-rotatable around the axis line and immovable along the axis line, a biasing member that presses the movable sheave in a direction toward the fixed sheave, a main torque-cam mechanism that presses the movable sheave in the axis line in accordance with a relative difference in a rotational angle between the spider and the movable sheave, and a sub torque-cam mechanism that presses the movable sheave in the axis line in accordance with a relative difference in a rotational angle between the fixed sheave and the movable sheave.

Abstract: A continuously variable transmission configured to transmit a rotational driving force of one pulley to another pulley by a driving-force transmitting means wound between the two pulleys, wherein each of the two pulleys is configured to vary a groove width thereof, the continuously variable transmission including: an engagement-receiving portion provided to the driving-force transmitting means, in a side of the driving-force transmitting means on which the driving-force transmitting means is wound on the pulleys; and a movable engaging portion provided to a shaft portion of at least one of the two pulleys, wherein the movable engaging portion is movable in a radial direction of the shaft portion to protrude from and escape into the shaft portion, wherein the movable engaging portion is configured to protrude from the shaft portion so as to engage with the engagement-receiving portion at least one of when a pulley-ratio region is in a setting for highest speed and when the pulley-ratio region is in a setting f

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: Adjustable pulley (7), in particular for a continuously variable transmission, with a pair of pulley sheaves (9), whereof a first pulley sheave (9) is attached to a pulley shaft (6) of the adjustable pulley (7) and whereof a second pulley sheave (8) is attached to a sleeve (25) of the pulley shaft (6) that is axially displaceable relative to such shaft (6). The adjustable pulley (7) being provided with a conically shaped coil spring (101) that is placed between the second, displaceable pulley sheave (8) and the pulley shaft (6) or a component (26) of the adjustable pulley (7) that is fixed to such shaft (6).

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 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: An electric-control belt-type continuous variable-speed transmission mechanism includes a driving-shaft, a driven-shaft, a driving-wheel, a driven-wheel, a transmission belt, a force-exerting device, an electric-control motor speed-adjusting device and an idle wheel. The electric-control motor speed-adjusting device operates along with the driving-wheel and the driven-wheel to dynamically control and adjust the overall configuration position of the transmission belt to thereby achieve effects of variable speeds, separation and restoration of dynamics. The idle wheel is rotatably disposed on the driving-shaft or the driven-shaft to axially support the transmission belt during the state of separate dynamics to prevent friction therebetween.

Abstract: An electrical control belt continuously variable transmission system controls a movable driving half-pulley or movable driven half-pulley initiatively, by changing a driving interval between the movable driving half-pulley and a fixed driving half-pulley or a driven interval between the movable driven half-pulley and a fixed driven half-pulley, respectively, depending on different statuses, in order to adjust a velocity ratio. By manipulating the movable driving half-pulley or the movable driven half-pulley, the system may further form a driving gap between the movable driving half-pulley and a transmission belt or a driven gap between the movable driven half-pulley and the transmission belt, such that the power is cut off. Clamping the movable driving half-pulley or the movable driven half-pulley to the transmission belt may restore the outputting of the power.

Abstract: A continuously variable belt transmission for a vehicle which can generate a cancellation hydraulic pressure for cancellation with a simple construction, as well as urge a movable sheave in the direction for producing a belt pressing force even at the time a vehicle is towed. A member to form a first hydraulic chamber P1 where a pressing force acting on the movable sheave is generated and a circular member forming a part of a second hydraulic chamber P2 where a hydraulic pressure is generated to cancel a centrifugal hydraulic pressure generated in the first hydraulic chamber P1 are provided, wherein the circular member is formed of an elastic member urging the movable sheave in the direction for generating the belt pressing force at a position of the movable sheave in a predetermined gear ratio.

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 clutch includes a stationary sheave, a cam attached to the stationary sheave, and a movable sheave that is axially movable relative to the stationary sheave along the cam. A thrust bearing includes an outer race and an inner race, wherein the outer race is attached to the cam. A first radial spring includes a radially outward annular portion and an radially inward finger portion, wherein the radially outward annular portion is mounted on the movable sheave and wherein the radially inward finger portion bears against the inner race. In another aspect, a clutch includes a stationary sheave, a cam attached to the stationary sheave, and a movable sheave that is axially and rotationally movable relative to the stationary sheave along the cam.

Abstract: A snowmobile is disclosed having improved drive train including a continuously variable transmission (CVT) having a drive belt looped around a driving pulley and a driven pulley, and a transversely arranged jackshaft wherein the driven pulley is connected directly onto the outer surface of one end of the jackshaft. The transverse jackshaft is preferably made from a thin-walled hollow tube and the driven pulley is preferably press fitted thereon. A method of assembling a snowmobile drive train is also disclosed.

Abstract: The driving pulley has a fully clutched mode of operation where a drivebelt and a driveshaft are coupled together in a torque transmitting engagement and also has an unclutched mode of operation where there is substantially no torque transmitting engagement between the drive belt and the driveshaft. The driving pulley comprises at least one transitional clutch spring that is in a first position when the driving pulley is in the unclutched mode of operation and that is in a second position when the driving pulley is in the fully clutched mode of operation. The at least one transitional clutch spring remains substantially in its second position regardless of the relative axial distance between the sheaves when the driving pulley is in the fully clutched mode of operation. A method of operating a driving pulley is also disclosed. The proposed concept provides a smoother engagement during the transition from the unclutched mode to the fully clutched mode.

Abstract: In a speed ratio control device for a belt continuously variable transmission according to this invention, when a speed ratio is subjected to feedback control on the basis of a difference between an actual speed ratio and a target speed ratio, pressure supplied to a primary pulley is corrected through feedforward (S17, S18) in order to suppress variation in the groove width of the primary pulley caused by a rapid variation in an input torque into the primary pulley (S17) while traveling in a fixed speed ratio mode (S14) in which the target speed ratio is held at a fixed value.

Abstract: A continuously variable transmission configured to transmit a rotational driving force of one pulley to another pulley by a driving-force transmitting means wound between the two pulleys, wherein each of the two pulleys is configured to vary a groove width thereof, the continuously variable transmission including: an engagement-receiving portion provided to the driving-force transmitting means, in a side of the driving-force transmitting means on which the driving-force transmitting means is wound on the pulleys; and a movable engaging portion provided to a shaft portion of at least one of the two pulleys, wherein the movable engaging portion is movable in a radial direction of the shaft portion to protrude from and escape into the shaft portion, wherein the movable engaging portion is configured to protrude from the shaft portion so as to engage with the engagement-receiving portion at least one of when a pulley-ratio region is in a setting for highest speed and when the pulley-ratio region is in a setting f

Abstract: In a motorcycle having a V-belt type continuously variable transmission, a resin washer made of a nylon resin is interposed between a boss fixed to a moving sheave half of a secondary sheave and a spring bearing member. The boss contacts the spring bearing member through the resin washer, whereby the moving sheave half is restricted to a Top position, in which a spacing between it and a stationary sheave half becomes maximum. In this manner, the maximum speed is not changed by exchange of the V-belt, the V-belt does not slip or become considerably abraded or deteriorated, and noise generation is suppressed.

Abstract: A continuously variable transmission has a primary pulley having a primary movable sheave that is capable of moving to change a groove width of the primary pulley, and a secondary pulley having a secondary movable sheave that is capable of moving to change a groove width of the secondary pulley. Endless flexible members are engaged with the primary pulley and the secondary pulley to transmit torque therebetween. At least one of the pulleys has a thrust applying mechanism that is capable of applying spring force and first fluid pressure force to the movable sheave of the pulley so as to narrow the groove width thereof and generating second fluid pressure force opposite to the spring force and the first fluid pressure force.

Abstract: A fixed pulley face of a drive V-pulley of a V-belt type continuously variable transmission includes a belt sliding contact disc having a conical belt sliding contact surface and fixed to a crankshaft so as to be integrally rotated, and a cooling fan fixed to the crankshaft so as to be integrally rotated in adjacent to a side surface opposite to the belt sliding contact surface of the belt sliding contact disc, and a starter driven gear is formed in an outer peripheral portion of the cooling fan.

Abstract: The invention relates to an adhesive gun which can be handled by individuals and can be used for applying in particular a two-component adhesive, which enables a large mixing ratio between a relatively viscous adhesive component and a relatively liquid adhesive component in an adhesive gun in a simple manner. In addition, the invention relates to a holder for a relatively liquid adhesive component, a mixing unit and a connecting piece for use in an adhesive gun of this type. The invention furthermore provides a method for applying a multi-component adhesive using an adhesive gun of this type.

Abstract: During Low return control, in which a speed ratio determined by a contact radius of a V-belt (4) with a non-rotating primary pulley (2) and a non-rotating secondary pulley (3) is shifted toward lowest speed ratio while the vehicle is stationary, an estimated speed ratio (ic) is calculated on the basis of a secondary pulley pressure (Psec). When a start request is issued to the vehicle while Low return control is underway, a primary pulley pressure (Ppri) and the secondary pulley pressure (Psec) are controlled on the basis of the estimated speed ratio (ic).

Abstract: A hybrid clamping mechanism for a belt continuously variable transmission (CVT) is disclosed. A pulley having adjustable belt-engagement surfaces allow for a variable effective diameter of the belt when about the pulley. A clamping spring disposed to bias the belt-engagement surfaces closer together exert a clamping force on the belt. A first hydraulic drive is disposed to assist the clamping force of the clamping spring, and a second hydraulic drive is disposed to oppose the clamping force of the clamping spring. The total clamping force at the belt results from the clamping spring, the first hydraulic drive, the second hydraulic drive, or any combination comprising at least one of the foregoing.

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: A continuously variable transmission having an input cone pulley pair and an output cone pulley pair linked by and an encircling mechanism. One pulley of each pair is axially fixed and one pulley is axially displaceable to control the transmission ratio of the transmission. A recoil spring engages between the input moveable pulley and an axially fixed contact surface only when the transmission is in the low transmission ratio range for exerting a force to displace the input moveable cone pulley to a high transmission ratio to avoid damage to the transmission or starting clutch during towing.

Abstract: A vehicle transmission includes a crankshaft extending through a seal cover and into an oil-storing end portion of a driven shaft. The oil-storing end portion of the driven shaft defines a lubricating space filled with lubricating oil, and extends into the seal cover. A unidirectional clutch is disposed in the lubricating space and outwardly of the seal cover.

Abstract: A continuously variable transmission or clutch device (10) includes at least one pulley (18) rotatable on a pivot (28) and having a pair of adjustable sheaves (30, 34) including a movable sheave (30) movable along the pivot. An ortho-planar compliant mechanism (14) is capable of elastic deformation and operatively coupled to the movable sheave to bias the movable sheave towards or away from the other sheave. The ortho-planar compliant mechanism includes a substantially flat configuration and is deflectable therefrom as the movable sheave moves. The ortho-planar compliant mechanism can include a center platform (38) disposed on the pivot and a plurality of arms (42) extending from the platform to distal ends (46) coupled to the movable sheave.

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: An engine for an offroad vehicle including a crankcase, a transversely extending crankshaft, and a transmission connected to the crankshaft. The transmission includes a drive pulley, a driven pulley, and a drive belt connecting the drive pulley and the driven pulley. The driven pulley includes a fixed half and a movable half. A spring is adapted to bias the movable half toward the fixed half. A transmission primary shaft is connected to the drive pulley and is coaxial to the crankshaft. A transmission main shaft is connected to the driven pulley. A transmission case is connected to the crankcase. The crankcase includes a cavity and the transmission case includes an opening that corresponds with the cavity such that the main shaft extends through the cavity and the opening. The spring is at least partially positioned within the cavity.

Abstract: A continuously variable belt drive system including a driving pulley assembly, a driven pulley assembly, and a V-shaped belt engaged to transfer rotary power therebetween is disclosed herein. The driving pulley assembly includes an idler pulley portion. As the belt speed decreases, the belt migrates downward within the driving pulley assembly until it falls within the idler pulley portions, thereby isolating the belt from the rotation of the driving pulley assembly. The driving pulley assembly also includes a belt tensioning mechanism that maintains proper belt tension at all speeds and drive ratios. The tensioning mechanism relies upon a pivotably mounted centrifugal weight arm to provide tensioning as a function of speed. A compression spring provides axial pressure to maintain belt tension over all drive ratios. The spring, acts against a curved cam edge on a pivoting lever arm, which arm transfers an axial force to the rear sheave of the driven pulley assembly.

Abstract: A hydraulically controllable constant speed drive, includes an input shaft (10) provided with an input pulley (1), an output shaft (20) provided with an output pulley (2) and a drive belt (3). Each pulley (1; 2) is provided with two pulley sheaves (11, 12; 21, 22) that are mutually axially displaceable under the influence of a hydraulic pressure to be exerted in a piston-cylinder assembly (14, 15; 24, 25) associated with the pulley (1, 2) and that define a tapered groove of variable axial width wherein the drive belt (3) is accommodated. An input spring (17) is provided that realizes an axial force urging the pulley sheaves (11, 12) of the input pulley (1) towards each other to prevent slip of the drive belt (3) when the hydraulic pressure is negligible.

Abstract: In a constant horse-power type continuously variable transmission, a pressing force supply path using for a rotation-speed control is supplied to one of an input pulley d an output pulley, and an elastic force supply path using for an axial torque control to the then. However, the one pulley is applied only the pressing force as a control element, although the torque of the other pulley can be regulated by the elastic force, so that the frictional force applied to said one pulley cannot be positively regulated, and consequently, axial torque controls of an input shaft and an output shaft cannot be achieved sufficiently. This effect causes the transmission efficiency to deteriorate at both end ranges of a variable speed range.

Abstract: A driven pulley system for use in a torque converter of a vehicle is disclosed. The driven pulley system includes relatively axially movable first and second flanges arranged to squeeze a belt of the torque converter therebetween. The driven pulley system also includes a spring positioner that includes a worm gear and a worm arranged to rotate the worm gear to wind or unwind a spring to cause relative axial movement between the first and second flanges to adjust the squeeze of the belt by the first and second flanges.

Abstract: An automotive V-belt nonstage transmission includes a drive pulley having a fixed sheave fixedly mounted on a drive shaft, a movable sheave mounted on the drive shaft, a return coil spring, a flyweight mechanism, a collar being rotatable relative to the fixed and movable sheaves is mounted rotatably on the drive shaft, and a one-way clutch mounted between the collar and the drive shaft interlocks the collar and the drive shaft so that only the rotation of the collar in the normal rotating direction is transmitted to the drive shaft. The collar has an outer surface serving as a bottom surface of a V-groove defined by the respective conical pressure surfaces of the fixed and the movable sheave of the drive pulley, and a conical surface forming a central part, around the drive shaft, of the conical pressure surface of the fixed sheave of the drive pulley.

Abstract: A method and a control system for supplying a working medium to a hydraulically-operated device. The working medium pressure is adjusted as a function of a control variable provided by a pressure control valve or a pressure reduction valve, both within a nominal working pressure range and also within a maximum working pressure range that lies between the nominal range and a system pressure value. For the same change in the control variable, the working medium pressure is changed by a greater amount in the maximum pressure range than it is in the nominal pressure range. Thus, in the nominal pressure range a precise adjustment of the working pressure can be made, and in the maximum pressure range a larger working pressure adjustment can be made to respond to suddenly increased external forces that act on the hydraulic device.

Abstract: Since a pressing force applied to a pulley has the ability to regulate a rotation speed and an elastic force applied to the pulley has the ability to regulate torque, by independently applying the pressing force and/or the elastic force to the single pulley, and externally regulating the pressing force and/or elastic force to arbitrary values independently, a practical speed-change range is widened irrespective of a type of belt and high effective transmission is achieved. The pulley pressure control system comprises pressure application means for applying at least one of a pressing force and an elastic force to each movable disk, in which the pressing force applied to the movable disk regulates a rotation speed of each pulley by shifting a position of the endless belt on the pulley and the elastic force applied to the movable disk regulates torque using a frictional force.

Abstract: Since a pressing force applied to a pulley has ability to regulate a rotation speed and an elastic force applied to the pulley has ability to regulate torque, by independently applying the pressing force and/or the elastic force to the single pulley, and externally regulating the pressing force and/or elastic force to arbitrary values independently, a practical speed-change range is widened irrespective of a type of belt and high effective transmission is achieved. The pulley pressure control system comprises pressure application means for applying at least one of a pressing force and an elastic force to each movable disk, in which the pressing force applied to the movable disk regulates a rotation speed of each pulley by shifting a position of the endless belt on the pulley and the elastic force applied to the movable disk regulates torque using a frictional force.

Abstract: The invention relates to a speed transmission for a mower, in particular a lawnmower, comprising a speed changer. This transmission is characterized in that the speed changer is constituted by a transmission with a belt (5) between a drive pulley (6) mounted on the motor shaft (1) that bears the blades and a driven pulley (7) mounted on the input shaft (2) of the reducer (4), the drive pulley (6) and the driven pulley (7) each having flanges (6A, 6B) (7A, 7B) that are movable, the movement of the flanges (6A, 6B) of the drive pulley (6), ensuring continuous tensioning of the belt, being controlled automatically as a function of the couple transmitted between said pulleys by means of a member (8) for the continuous adjustment of the tension of the belt (5) while the movement of the flanges (7A, 7B) of the driven pulley (7), ensuring the speed change, is controlled manually by means of a control member (12).

Abstract: Disclosed is a continuously variable transmission in which when a shaft torque is secured by a belt friction force generated by externally pressing a pulley, difficulties of transmission and deteriorations of efficiency caused by short or surplus of the friction force of input and output pulleys are overcome, as a consequence of which the stable friction transmission with high efficiency and widened ratio range can be achieved. The continuously variable transmission includes a first transmission device performing higher efficiency in a big ratio range of the transmittable range than a second transmission device, the second transmission device performing higher efficiency in a small ratio range of the transmittable range than the first transmission device, and a switching device changeably selecting in the alternative the first and the second transmission devices, to combine with the big and small ratio ranges to enlarge an entire transmittable range while keeping high efficiency.

Abstract: The invention concerns a continuously variable belt-drive transmission, especially for motor vehicles. In the pressure less state of the transmission, the axially displaceable cone pulley of the input shaft is loaded with an axial force by a spring system in a manner such that the contact pressure increases on the belt-drive mechanisms and the ratio of the transmission is reduced.

Abstract: The invention concerns a continuously variable transmission especially for a motor vehicle. During a zero pressure condition of the transmission, the axially slidable conically tapered disk, on the input shaft, is subjected to a spring force, by a spring arrangement, so that the pressure on the V-belt is increased and the gear ratio of the transmission is lowered to an acceptable level to prevent inadvertent damage to the transmission.

Abstract: A variable speed transmission includes an actuator mechanism that can be remotely activated to cause engagement of a drive unit and to subsequently vary the speed of the drive unit using the same activation mechanism. The variable speed transmission can include a first pulley that has a first and second face that are movable relative to each other by activation of the actuator mechanism. When the first and second faces of the first pulley are located in a first position, a belt located on the first pulley remains motionless. The first and second faces can be moved by the actuator mechanism into a second position where the first and second plates engage the belt with enough frictional force to cause the belt to start moving about the first pulley. The first and second faces of the first pulley can also be moved between the second position and a third position such that the space between the faces becomes smaller.

Abstract: A variable speed transmission includes an actuator mechanism that can be remotely activated to cause engagement of a drive unit and to subsequently vary the speed of the drive unit using the same activation mechanism. The variable speed transmission can include a first pulley that has a first and second face that are movable relative to each other by activation of the actuator mechanism. When the first and second faces of the first pulley are located in a first position, a belt located on the first pulley remains motionless. The first and second faces can be moved by the actuator mechanism into a second position where the first and second plates engage the belt with enough frictional force to cause the belt to start moving about the first pulley. The first and second faces of the first pulley can also be moved between the second position and a third position such that the space between the faces becomes smaller.

Abstract: The invention concerns a device in a continuously variable belt transmission system for guiding a conical pulley (3) of a variator on a variator shaft (1). The movable conical pulley (3) is fitted onto two bearing sections (4, 5) of the variation shaft (1). To transfer torque between the movable conical pulley (3) and the variator shaft (1), at least one cylindrical pin (6) is provided, which is fitted into an axial guide groove (7) in the variator shaft (1) and an axial guide groove (8) of the movable conical pulley (3).

Abstract: Since a pressing force applied to a pulley has ability to regulate a rotation speed and an elastic force applied to the pulley has ability to regulate torque, by independently applying the pressing force and/or the elastic force to the single pulley, and externally regulating the pressing force and/or elastic force to arbitrary values independently, a practical speed-change range is widened irrespective of a type of belt and high effective transmission is achieved. The pulley pressure control system comprises pressure application means for applying at least one of a pressing force and an elastic force to each movable disk, in which the pressing force applied to the movable disk regulates a rotation speed of each pulley by shifting a position of the endless belt on the pulley and the elastic force applied to the movable disk regulates torque using a frictional force.