Abstract: A CVT transmission comprising a shaft journalled to a housing, a first sheave fixed to the shaft, a second sheave moveable parallel to an axis of rotation of the shaft, the second sheave locked in rotating relation with the first sheave by a first sheave member cooperatively engaged with a second sheave receiving member, the second sheave receiving member disposed at a helical angle (HA) with respect to the axis of rotation, a sprocket journalled to the housing, the sprocket threadably engaged with a movable member, a bearing disposed between the movable member and the second sheave, the movable member engaged with the housing whereby movement of the movable member is parallel with the axis of rotation, an electric actuator engaged with the sprocket, and the second sheave is axially movable upon a rotation of the sprocket.

Abstract: A hydraulic control system for a transmission is provided. The hydraulic control system provides a latching system to retain CVT clutch pressure and/or pulley pressure for one or more CVT torque transmitting mechanisms and/or CVT pulleys in a CVT transmission. Components of the hydraulic control system of the present disclosure may include blow off valves, such as ball check-valves, on the exhaust of the pulley control valves and the exhaust of the CVT clutch control valve(s), and a one-way valve, such as a supply ball check-valve, disposed adjacent to each of the fluid supply inlets of the pulley control valves and the fluid supply inlet of the CVT clutch control valve(s).

Abstract: The present invention concerns a gear assembly, suitable for a continuously variable transmission, comprising two gear tooth devices (10, 50) making up an imaginary gear wheel with variable pitch diameter, the two gear tooth devices being radially movable and also a continuously variable transmission comprising an input shaft (1), an output shaft (2), a gear-changing shaft (3) and first gearbox shaft (4) comprising a gear assembly according to the invention, a transmission chain (5) and a second gearbox shaft (6) comprising a gear assembly according to the invention or a gear wheel (7), whereby the first gearbox shaft (4) is driven by the input shaft (1), the second gearbox shaft (6) or the gear wheel (7) is driven by the first gearbox shaft (4), and the output shaft (2) is driven by the second gearbox shaft (6) or the gear wheel (7).

Abstract: A continuously variable transmission has an input pulley assembly connected to a first transfer pulley assembly with a first chain and a second transfer pulley assembly connected to an output pulley assembly with a second chain. The first transfer pulley assembly and the second transfer pulley assembly shaft a common shuttle disk that moves axially on a countershaft that carries the first and second transfer pulleys. The input pulley assembly and the output pulley assembly are generally axially aligned and a bearing carrier is positioned between the pulleys. A high pressure fluid supply system reduces or eliminates axial loading on the shafts of the transmission.

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: A speed adjusting device for a drill includes two pulley assemblies between which a belt is connected. Each pulley assembly has a fixed disk and a movable disk so that an effective diameter that the belt engages the pulley assembly can be changed by adjusting a distance between the disks. One of the pulley assembly driven by a motor shaft has a spring which is biased between the movable disk and a motor. A pressing member presses the movable disk of the other pulley assembly which is connected to an output shaft. A lifting device can be operated to adjust the pressing member to allow the spring to change the distance between the other pulley assembly so as to obtain different effective diameter in each pulley assembly.

Abstract: Disclosed is a continuously variable transmission in which when a shaft torque is secured by the belt friction force generated by externally pressing a pulley, the disablement of transmission caused by a belt rolling-in phenomenon within a pulley resulting from instability of the friction force or the friction coefficient as the pressing force is applied, or the deterioration of efficiency caused by the short or surplus of the friction force of input and output pulleys in a big ratio area are overcome, as a consequence of which the stable friction transmission with high efficiency can be achieved without depending on the kind of belts such as a tension type or a compression type.

Abstract: A continuously variable transmission has dual driving connections extending between a first shaft and a second shaft. The driving connections generally include a drive pulley, a driven pulley and a belt. The pulleys each comprise a fixed portion and an axially moveable portion. Movement between the two portions changes an effective diameter of the pulley. The moveable portions of the drive pulley are positioned next to one another on the first shaft and the moveable portions are interposed between the fixed portions of the drive pulleys. The fixed portions of the driven pulleys, on the other hand, are interposed between the moveable portions. The driven pulleys are free to rotate relative to the second shaft. A differential is positioned between the fixed portions of the driven pulleys, connects the two fixed portions and transfers the torque from the driven pulleys to the second shaft.

Abstract: In a constant-horsepower transmission having a primary pulley, a secondary pulley and a belt extended between the primary and the secondary pulley, a predetermined frictional force acting between the pulley and the belt is secured by an external instruction, and the pulley is capable of automatic alignment and shock absorption to ensure stable power transmission from the belt to the pulley. A first compressing device compresses an elastic device in response to an external instruction, a first pressing device including the elastic device applies a pressure and an elastic force produced by the compressed elastic device to the belt through the pulley. A predetermined frictional force is secured by the pressure and stable power transmission is insured by the elastic force. A first pressure application controller executes a variable pressure application control operation to apply an optional pressure to the belt by displacing or not moving the movable disk of the pulley.

Abstract: The assembly includes an input member having a radial surface and fitted integrally with a coaxial drive shaft; and a pulley fitted coaxially to and idle with respect to the drive shaft and having two half-pulleys connected to each other to rotate integrally and move axially with respect to each other, and which engage a drive belt. There is also provided a thrust-clutch member, which is connected to the drive shaft so as to rotate integrally with and move axially with respect to the drive shaft, and is located adjacent to the second half-pulley.

Abstract: A transmission wheel pressurizing apparatus for always supplying, in a continuously variable transmission of a constant HP transmission type, a pressurizing force and an elastic force to one out of two transmission wheels simultaneously and only a pressurizing force to the other. For securing the desired number of revolutions and axial torque by always applying a variable pressurizing force and an elastic force of the former, an indirect pressurizing system by way of an elastic member is employed. Upon giving pressurizing control to driven transmission wheel, an elastic device and a compression device are combined so that respective pressurizing forces are superposed in series one another, and the pressurizing force to the driven transmission wheel and the number of revolutions of the transmission wheel are made in inverse proportion to one another to realize pressurizing characteristics of negative inclination.

Abstract: The present invention provides a radial drive connection between a movable flange and the shaft of an adjustable pulley. Specifically the movable flange is driven through the use of supports fixed to the shaft which radially fix the movable flange while allowing for axial movement. The supports are provided through a rigid disc splined to the shaft. The disc has an annular extension extending therefrom. Attached at one end to the disc and at the opposite end to the extension is at least one guide. Each guide includes a bolt or pin and an annular sleeve. The movable flange is configured to have a foot which has an annular wall to it. Through this wall the movable flange slidably engages the guide and provides a radial drive connection. Because the wall and guide slide, however, the movable flange is permitted to move in the axial direction.

Abstract: The present invention provides a radial drive connection between a movable flange and the shaft of an adjustable pulley. Specifically the movable flange is driven through the use of supports fixed to the shaft which radially fix the movable flange while allowing for axial movement. The supports are provided through a rigid disc splined to the shaft. The disc has an annular extension extending therefrom. Attached at one end to the disc and at the opposite end to the extension is at least one guide. Each guide is made from a bolt or pin and an annular sleeve. The movable flange is designed to have a foot which has an annular wall to it. Through this wall the movable flange slidably engages the guide and provides a radial drive connection. Because the wall and guide slide, however, the movable flange is permitted to move in the axial direction.

Abstract: A continuous V-belt transmission comprising: a primary pulley and a secondary pulley individually including two sheaves supported on shafts and made axially movable relative to each other; a belt made to run on the two pulleys; mechanical actuators individually including first members and second members for moving the movable sheaves of the two pulleys on the basis of the relative rotations of the two members: and pressure regulating mechanisms for applying an axial force corresponding to a transmission torque to at least one of the pulleys. In an unshifted state, the rotations of the pulleys are transmitted from the externally threaded portions integrated with the movable sheaves to the carriers of the planetary gear mechanisms so that they are transmitted through the ring gears to toe internally threaded portions on the basis of the sun gears being stopped. At this time, the externally threaded portions and the internally threaded portions are rotated integrally with the pulleys at the same r.p.m.

Abstract: A system and several strategies for controlling a continuously variable transmission with an improved secondary servo arrangement in order to efficiently provide sufficient clamping forces under high torque conditions. The valving means allowing for the relative movement of the second variable pulley's movable sheave includes a valving arrangement operative to regulate the secondary apply pressure at or below the hydraulic source pressure and distinct from the primary line pressure. Control signals are developed to prevent belt slip and to efficiently launch a vehicle, maintain the necessary primary to secondary clamping force ratio in overdrive conditions, and avoid overpressurization of the secondary servo for many vehicle operating conditions.

Abstract: An improvement in a bait cast reel of the type having a line-carrying spool, a rotatable crank handle with an associated crank shaft for imparting rotation to the spool to wind line thereon, a line guide, and a worm bear operable in response to rotation of the crank shaft for causing reciprocative movement of the line guide across the spool as the spool is rotated to thereby evenly distribute line on the spool. The improvement is a drive pulley element that follows rotation of the crank shaft and frictionally engages a shaft carrying the worm gear to impart rotation thereto. Slippage can occur between the drive element and the worm gear shaft when a predetermined resistance to rotation of the worm gear shaft is encountered, i.e. when a user's finger jams the line guide.

Abstract: Pulleys are provided with load cam mechanisms which exert axial forces corresponding to transmitted torque, and actuator means such as ball screw mechanisms which shift the movable sheaves of both pulleys in axial direction, wherein the axial forces occuring at the pulleys are carried by their shafts and do not act on the housing. A counter shaft is located between the primary and secondary shafts, the countershaft being rotated to drive the actuator means through gearing such as gearwheels, to alter the drive ratio. During power transmission, the axial forces acting on the movable sheaves of primary and secondary pulleys are converted into torque by the actuator means, where the torques are transmitted to the counter shaft in the form of counteracting torques, so that alteration of drive ratio can be made with slight effort on the counter shaft, equivalent ot the difference between the counteracting torques.

Abstract: A continuously variable transmission incorporating a variator having first and second sheaves of adjustable effective diameter by moving one pulley half axially with respect to another to vary the effective diameter of each sheave for engagement with a flexible drive band has a fixed pulley half of one sheave facing the moveable pulley half of the other sheave to maintain alignment of the drive band in the usual way. Both adjustable pulley halves are operated from adjustment means on the same side of the drive band, one adjustment means being connected through the center of the fixed pulley half to the moveable pulley half and that fixed pulley half being mounted by its outer periphery.

Abstract: A variable ratio belt drive in which a pair of pulleys each having axially movable flanges are driven by a belt and in which the ratio of the pulleys can be changed and for all ratio changes, the load between the pulley and the belt is proportional to the useful tangential force at the belt and its friction coefficient with the pulley to produce only the necessary pressure between the pulley flanges and the belt to transmit the power applied to one pulley to the other pulley. The force on the flanges of the pulleys results from control plates having opposed control surfaces of a particular configuration which are forced apart in response to the application of torque to move the pulley flanges axially toward each other with the required force. One embodiment uses a plurality of control surfaces to increase the movement of pulley flanges and thereby the maximum ratio that can be obtained.