Abstract: A hybrid vehicle includes: an oil passage including a common oil passage through which lubricating oil discharged from an oil pump flows, an engine lubricating oil passage extending from the common oil passage toward an engine internal space, and a transmission lubricating oil passage extending from the common oil passage toward a transmission internal space; and a variable throttle valve that can change a flow rate in the transmission lubricating oil passage. The variable throttle valve increases an opening degree of the variable throttle valve in a mode transition in which a first traveling mode in which the hybrid vehicle travels by driving power of an engine transitions to a second traveling mode in which the hybrid vehicle stops the engine and travels by the driving power of the electric motor.

Abstract: A CVT variator transmission box for using on a bicycle is provided. The CVT variator transmission box increases or decreases a speed of a rotation of pedals or hands when a form of a motion transmission is provided; and the CVT variator transmission box introduces a new variator gearbox with a CVT variator transmission mechanism capable of transmitting to a front wheel or a rear wheel by increasing or decreasing the speed from the pedals or the hands when the form of the motion transmission is provided. The CVT variator transmission box is positioned on any part of the front wheel, the rear wheel or on a frame of the bicycle.

Abstract: A control apparatus for a vehicle drive-force transmitting apparatus which includes a gear mechanism and a continuously-variable transmission mechanism and which establishes selectively a first state in which a drive force is transmitted by the gear mechanism and a second state in which the drive force is transmitted by the continuously-variable transmission mechanism. The control apparatus sets a shift-up-action permitted gear ratio of the continuously-variable transmission mechanism, which makes a state-switch-requiring shift-up action is permitted to be executed. When a running speed of the vehicle is not higher than a given value, a predetermined high gear ratio value is set as the shift-up-action permitted gear ratio. When the running speed is higher than the given value, a predetermined gear ratio range ranging from the predetermined high gear ratio value to a predetermined low gear ratio value is set as the shift-up-action permitted gear ratio.

Abstract: A variable speed drive having a rotatable drive shaft, a fixed sheave fixed relative to the drive shaft and mounted for rotation with the drive shaft, a movable sheave mounted for axial movement relative to the drive shaft, a plurality of drive fingers projecting axially from one of the sheaves, each drive finger defining a finger contact, and a plurality of recesses in the other sheave, each drive finger being movably received by a corresponding one of the recesses, and each recess defining a recess contact that slidably engages the corresponding finger contact.

Abstract: A method of controlling a continuously variable transmission includes monitoring powertrain operating conditions, and calculating, via an electronic controller, a commanded clamping force based on the powertrain operating conditions, wherein the commanded clamping force includes a commanded clamping force of an input pulley and a commanded clamping force of an output pulley on the endless rotatable device. The method also includes activating, via the electronic controller, at least one of the input actuator and the output actuator such that an axial component of the input wedge force and the axial force of the input actuator together provide the commanded clamping force of the input pulley, and an axial component of the output wedge force and the axial force of the output actuator together provide the commanded clamping force of the output pulley.

Abstract: A continuously variable speed transmission and steering differential having a central drive axle, two pairs of sheaves and two shift arms. The drive axel is driven by an external power source. The two pairs of sheaves, left and right, are mounted to the drive axel. Each pair of sheaves includes a fixed drive sheave and a movable drive sheave. Each movable drive sheave is positioned by a shift arm. Shifting the shift arms left or right varies the gear ratio between the left and right pair of sheaves thereby providing steering control. Narrowing the distance between the shaft arms increases the gear ratio and consequently puts the transmission into a higher gear, thereby providing speed control.

Abstract: The present concept is a continuously variable speed transmission and steering differential. It includes a laterally extending central drive axle driven by an external power source, two pairs of drive sheaves mounted to drive axles, and a means for transmitting rotational energy from the drive sheaves to the drive axles. There are two extended shift arms spaced apart for controlling the positioning of movable drive sheaves. Narrowing or increasing the gap between shift arms, does the same for the gap between the drive sheaves, increasing or decreasing the gear ration respectively which provides speed control. Shifting the shift arms left or right varies the gear ratio between the left and right pair of sheaves, providing differential speed between the left and right driven axles, which provides steering control.

Abstract: A variable drive includes a rotatable drive shaft, a fixed sheave fixed axially relative to the drive shaft and mounted for rotation with the drive shaft, and a movable sheave mounted for axial movement relative to the drive shaft. A plurality of drive fingers project from one of the sheaves. A plurality of recesses are formed in the other sheave. Each drive finger is movably received by a corresponding one of the recesses. A bearing member is interposed between the drive fingers and the other sheave. The bearing member includes a plurality of bearing fingers. Each bearing finger is positioned between one of the drive fingers and a wall of a corresponding one of the recesses.

Abstract: A continuously variable transmission assembly includes a driving pulley rotatable about a driving pulley axis and a driven pulley rotatable about a driven pulley axis. An endless belt operatively connecting the pulleys defines a belt reference plane, the driving and driven pulley axes passing therethrough. A housing encloses a space, the driving pulley, the driven pulley, and the belt being disposed at least in part therein. A driven pulley inlet and outlet defined in the housing are disposed closer to the driven pulley than the driving pulley. The driven pulley inlet, disposed on a first side of the belt reference plane, is configured to direct air from outside the housing into the space toward the driven pulley. The driven pulley outlet is disposed on a second side of the belt reference plane. Air flows from the space to the outside of the housing via the driven pulley outlet.

Abstract: In a structure for coupling a V-belt type continuously variable transmission with an engine of a vehicle, the engine includes a first opening through which a crankshaft passes. A coupling plate mounted on a plate mounting surface that surrounds the first opening includes a second opening through which the crankshaft and an upper end flange of the oil pan pass. First and second seal plates are disposed on front and back surfaces of the coupling plate, and the first and second seal plates seal a space into which the upper end flange is inserted. A liquid seal agent seals gaps of various locations of the second opening.

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: The present invention is provided with a hydraulic control circuit including a hydraulic pump driven by a driving power source in order to supply an oil pressure to a hydraulic circuit, a hydraulic auxiliary unit for supplying an accumulated oil pressure to the hydraulic circuit, and a control valve for supplying at least one of oil pressures of the hydraulic pump and the hydraulic auxiliary unit to pulleys, and a control unit for executing a coast stop control to stop the driving power source while traveling and controlling, when an increase of torque inputted to the continuously variable transmission is detected or predicted during the coast stop control, the control valve so as to supply an oil pressure of the hydraulic auxiliary unit to the pulleys.

Abstract: A transmission 20 includes an input shaft 12, an output shaft 13, a primary sheave 23 that rotates together with the input shaft 12, a secondary sheave 24 that rotates together with the output shaft 13, and a belt 25 wound around both the primary sheave 23 and the secondary sheave 24. The transmission 20 includes a motor 22 that shifts a transmission ratio by driving a movable sheave 23a of the primary sheave 23. A control device (ECU 5) of the transmission 20 includes a secondary sheave rotation speed sensor 28 that detects rotation of the belt 25, and a control portion 55 of the ECU 5 performs a sheave position control (normal control of the transmission ratio) after rotation of the belt 25 is detected after starting.

Abstract: To place an electric motor, which composes a groove width adjustment mechanism, away from a heat source so that the electric motor can be cooled actively, and to improve both the protection and the maintainability of the electric motor. A primary sheave 113 and a secondary sheave 123 each forming a V-groove with a variable width for receiving a belt are provided. A case 105 for housing the primary sheave 113 and the secondary sheave 123 is formed with an opening 110 for sucking and exhausting air into and out of the case 105. An electric motor 140 for driving a groove width adjustment mechanism 141 for the V-groove of the primary sheave 113 is disposed in an airflow path outside the case 105.

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 transmission controller permits a 2-1 shift, in which a gear position of a subtransmission mechanism is changed from a second speed to a first speed, when an accelerator pedal has been depressed to or above a predetermined opening. The gear position of the subtransmission mechanism is changed from the second speed to the first speed when an actual through speed ratio passes a mode switch line from a High side to a Low side while the 2-1 shift is permitted in the subtransmission mechanism.

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 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 said sleeve and moveable axially in relation thereto, said hub supporting a second sheave member having a second face that opposes said first face such that said first and second faces define therebetween a groove adapted to receive a belt and relative axial movement between said sleeve and said hub being adapted to vary at least one of pitch diameter and grip imparted to said belt from said sheaves; and c) an actuator mechanism adapted, through control of relative axial displacement between said sleeve and said hub, to vary at least one of said pitch and grip, said actuator mechanism comprising a control rod disposed substantially perpendicularly to the line of action of said axial displacement and connected to said hub through a link mechanism, said control rod being adapted to rotate and said link mechanism being adapted to transl

Abstract: A belt type continuously variable transmission for a vehicle such as a motorcycle includes a primary sheave and a secondary sheave each having a pair of flanges axially movable relative to each other. A belt is wound around the sheaves. An actuator controlled by a control device moves the flanges. The control device includes a determination section for determining whether the actual gear ratio of the belt type continuously variable transmission has become a predetermined gear ratio for TOP or LOW, and a first correction section for correcting an operation amount of the actuator based on the determination made by the determination section. Control accuracy in a region where the gear ratio is TOP or LOW is thereby improved.

Abstract: A control system for an electronically controlled continuously variable transmission of a straddle type vehicle in which an intentional shift down operation is easily made in an AT mode. An MT mode temporarily selecting section makes the gear change mode selecting section select the MT mode temporarily and makes the gear ratio control section change the gear ratio of the transmission to a gear ratio from among a plurality of predetermined gear ratios that is positioned lower than a current gear ratio when a mode change signal is inputted in AT mode. An AT mode returning section returns the gear change mode selected by the gear change mode selecting section to AT mode when a release signal is outputted after MT mode is temporarily selected by the MT mode temporarily selecting section.

Abstract: To place an electric motor, which composes a groove width adjustment mechanism, away from a heat source so that the electric motor can be cooled actively, and to improve both the protection and the maintainability of the electric motor. A primary sheave 113 and a secondary sheave 123 each forming a V-groove with a variable width for receiving a belt are provided. A case 105 for housing the primary sheave 113 and the secondary sheave 123 is formed with an opening 110 for sucking and exhausting air into and out of the case 105. An electric motor 140 for driving a groove width adjustment mechanism 141 for the V-groove of the primary sheave 113 is disposed in an airflow path outside the case 105.

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: A belt type continuous variable transmission comprises a primary sheave, a secondary sheave, and a belt. The primary sheave comprises a first sheave body, a second sheave body that forms between it and the first sheave body a belt groove, about which a belt is entrained, a plurality of push bodies that slide the second sheave body according to centrifugal forces to change a width of the belt groove, and a plurality of stoppers that restrict movements of the push bodies by contacting with outer surfaces of the push bodies when the second sheave body reaches a position of minimum transmission gear ratio, in which the belt groove is made smallest in width. The stoppers are shaped to accelerate partial wear of the outer surfaces of the push bodies.

Abstract: For enhancement of heating performance of a vehicle, operating speed of a water pump of an engine is varied in accordance with engine operation conditions, so a speed of a coolant temperature increase can be accelerated when needed.

Abstract: A method is provided for bearing a pitch or grip of a belt running between a pair of opposing faces of respective first and second sheave members of a power transmission device. The method includes moving the second sheave member axially in relation to the first sheave member by translating to the second sheave member, in a form of linear movement, rotation of a control rod disposed substantially at right angles to a line of axial spoke of the second sheave member.

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 said sleeve and moveable axially in relation thereto, said hub supporting a second sheave member having a second face that opposes said first face such that said first and second faces define therebetween a groove adapted to receive a belt and relative axial movement between said sleeve and said hub being adapted to vary at least one of pitch diameter and grip imparted to said belt from said sheaves; and c) an actuator mechanism adapted, through control of relative axial displacement between said sleeve and said hub, to vary at least one of said pitch and grip, said actuator mechanism comprising a control rod disposed substantially perpendicularly to the line of action of said axial displacement and connected to said hub through a link mechanism, said control rod being adapted to rotate and said link mechanism being adapted to transl

Abstract: A continuously variable reversible transmission including an input shaft (2), a housing (1), an input arm (4), first and second CVT shafts (5.6), a fixed input wheel (35), a ratio selector mechanism, an overall output wheel (36) and an output shaft (24). The input arm (4) is fixed to the input shaft (2) and extends substantially perpendicular to the input shaft. At each end of the input arm, a first (5) and second (6) CVT shaft is rotatably mounted, with the axes of the CVT shafts extending parallel to the input shaft. The fixed input wheel (35) may be aligned with the axis of the input shaft. The first CVT shaft (5) is coupled with the fixed input wheel (35), the second CVT shaft (6) is coupled with the first CVT shaft (5) and the output wheel (36) which is fixed to the output shaft (24) is coupled with the second CVT shaft.

Abstract: A variable speed transmission including a housing, a drive shaft having an axis of rotation and rotatably supported in the housing, an output shaft having an axis of rotation and rotatably supported in the housing, a first pulley and a second pulley both having a common axis of rotation, a third pulley having an axis of rotation and rotatably attached to the drive shaft, and a belt. The output shaft is operatively connected to the drive shaft. The first pulley and the second pulley each have a variable pitch diameter and changes in the first and second pulley variable pitch diameters being inversely proportional. The third pulley and one of the first and the second pulleys are in engagement though the belt.

Abstract: An indexing and braking mechanism for a manual transmission having a shifting mechanism and at least one rotatable drive shaft is disclosed. The mechanism includes an indexing mechanism for controlling movement of the shifting mechanism between at least a first position and a neutral position. The indexing mechanism has a plate having a plurality of notches formed thereon, wherein one notch corresponds to the first position and another notch corresponds to the neutral position. A locking mechanism is provided for selectively limiting movement of one of the at least one rotatable drive shaft. The locking mechanism is adapted to selectively engage the plurality of notches to selectively maintain the indexing mechanism in one of the first position and the neutral position. The locking mechanism includes an indexing lever having a projection extending from one side thereof. The projection is sized to be received within one of the plurality of notches.

Abstract: An improvement relating to an infinitely variable ratio transmission having a pair of oppositely oriented conical torque input and output members is disclosed wherein the conical members include multi-angled conical surfaces. Further the conical members include longitudinal floating sprocket bars which combined with the multi angled conical surfaces compensate for the effect of an inextensible drive belt as the drive belt is axially moved along the longitudinal length of the torque input and output members.

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: 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 continuously variable transmission wherein a driving pulley comprising a fixed driving pulley piece and a movable driving pulley piece is mounted on a driving shaft, a driven pulley comprising a fixed driven pulley piece and a movable driven pulley piece is mounted on a driven shaft disposed in parallel with the driving shaft, and a belt is entrained on both the driving pulley and the driven pulley. A torque converter and a forward/reverse change-over mechanism are disposed on an input side of the driving shaft with respect to the driving pulley, and an output clutch is disposed on an output side of the driven shaft with respect to the driven pulley.

Abstract: In a pair of conical disks (pulley halves) of an infinitely variable cone-pulley transmission, in the case where the conical disks are spaced apart, a pressure compartment through channels formed in a shaft A connects to a pressure chamber that serves to move one of the conical disks. The pressure compartment is on one side delimited by a piston-like part serving to modulate the pressure inside the compartment dependent on the torque acting on the pair of conical disks. By switching on the connection to the pressure compartment, the system pressure can be modulated not only dependent on the torque but also dependent on the transmission ratio. Advantageous designs of the valve arrangement for switching the pressure compartment on and off are described.

Abstract: In a continuously variable speed transmission T in which one of two power transmission paths connecting to a planetary gear mechanism 12 is formed of a belt variable speed mechanism 9, the other power transmission path is formed of a belt power transmission mechanism 6 so as to decrease the number of casings, increase the maintainabilities of the belt speed change mechanism 9 and the power transmission mechanism constituting the other power transmission path and further accelerate the application of the continuously variable speed transmission T to vehicles. Further, both variable speed pulleys 10, 10 and a variable speed belt 11 in the belt variable speed mechanism 9 are positioned above a casing 2 for the planetary gear mechanism 12, and both pulleys 7, 7 and a power transmission belt 8 in the belt power transmission mechanism 6 are positioned below the casing 2.

Abstract: The proposal is for a device for controlling a CVT (3) driven by a drive unit (1) in which an emergency running unit is activated on the breakdown of the electronic control device (15). It sets a constant compression or power ratio between the primary (S1) and secondary (S2) pulleys.

Abstract: In an infinitely variable speed transmission T of this invention, a belt variable speed mechanism 4 is arranged between a first rotatable shaft 1 and a second rotatable shaft 2. A planetary gear mechanism 81 is provided which comprises a first, a second, and a third element. The first element is drivingly coupled to the second rotatable shaft 2. The second and third elements are drivingly coupled by way of different power transmission lines to the first rotatable shaft 1. An enclosed gear housing space 78 is defined at the back of a fixed sheave 14 of a second variable speed pulley 13 of the belt variable speed mechanism 4, to house therein the planetary gear mechanism 81. A belt transmission mechanism 55 is arranged between the first and second rotatable shafts 1 and 2. Supported on a flange 82 integral with the second rotatable shaft 2 is a planetary gear 84 having a first gear part 85 that engages with a first sun gear 88 and a second gear part 86 that engages with a second sun gear 90.

Abstract: A pulley brace for mounting between a variable diameter driving pulley which is belt-coupled to a variable diameter driven pulley, the pulley brace consisting of an elongated body having first and second body ends and a central body portion therebetween, a first bearing connection on the first body end for coupling the elongated body to the driving pulley and a second bearing connection on the second body end for coupling the elongated body to the driven pulley and a turnbuckle arrangement at the central body portion for varying the distance between the first and second connections.

Abstract: A continuously-variable-ratio transmission ("CVT") of the band-and-sheave type capable of "torque control", so that what the operator demands, by movement of the accelerator pedal or other control member, is a particular driving torque applied to the ratio-varying components ("variator") A connection (21, 22) between at least one of the variator sheaves (3, 4) and its shaft (5) is torque-sensitive, so that torque at that sheave generates an axial force which is a function of the magnitude and direction of the torque to which the sheave is subjected. Examples are described in which the operating axial load, applied to the variator pulley units, comprises two parts--a first part to maintain traction between sheaves and band, and a second part related to the applied torque--and a variator using more than one band.

Abstract: A multi-speed transmission is provided which employs inflatable diaphragms to alter drive ratio. Particularly applicable to bicycles, the transmission is composed of a diaphragm mounted at the pedal axis and another mounted at the drive wheel axis, with a nylon drive belt connecting the two. These diaphragms are each inflated and deflated by way of pressurized cylinders mounted on the bicycle. Pedaling of the bicycle turns the pedal axis diaphragm which, in turn, drives the rear wheel diaphragm via a nylon drive belt. Pressure tubes carry the pressurized fluids from each of the cylinders to their respective diaphragm. Standard shifter mechanisms are used each of which, when moved, moves a piston within one of the cylinders, changing the pressure in that cylinder and the inflation of its respective diaphragm.

Abstract: A drive system suitable for a bicycle and capable of providing various drive ratios comprising first and second pairs of conical members, each pair including primary and secondary conical members, both of which are rotatable about a first or second transverse axis. The conical members each comprise a series of evenly spaced sectors with the sectors of the primary conical member being slidable between the sectors of the secondary conical member in each pair. There is a first shaft for rotating the first pair of conical members. The primary conical member of the first pair is slidably mounted on the first shaft. The secondary conical member of the first pair is fixedly mounted on the first shaft . The conical members of the second pair are mounted on a second shaft. The secondary conical member of the second pair is mounted for axial sliding movement relative to the primary conical member. A continuous V-shaped drive belt extends about both pairs of conical members.

Abstract: A set of interlocking sheaves having fan-shaped protruding curved surfaces of different conical angles and capable of varying their degree of interlock is used in conjunction with a drive line to provide a variable drive transmission system having a positive gear-like gripping action between the drive line and the sheaves, the improvement allowing increased drive line traction and noise reduction.

Abstract: This invention relates to a coiler using tongue and groove rollers preferably for measuring sliver thickness and guiding sliver emerging from between these rollers, using guide means such as a pair of calender rollers driven for rotation in the same conveying direction.Optionally the sliver between the conveying nip at the tongue and groove rollers and the guide means (when embodied as calender rollers) is severed by intermittent operation of the conveying and guiding nips.

Abstract: A variable diameter belt type power transfer assembly having a drive sheave and a driven sheave, both of which are adjustable and include a pair of opposing coaxial flanges, one of which is axially movable relative to the other, is disclosed wherein both flanges of the drive sheave are provided with first and second belt engaging surfaces flaring radially outwardly with respect to each other so as to define first and second variable diameter belt receiving grooves therebetween. A dual range of velocity ratios between the drive sheave and the driven sheave is obtainable by selectively positioning a drive belt in the respective variable diameter belt receiving grooves.

Abstract: A variable diameter belt type power transfer assembly having a drive sheave and a driven sheave, both of which are adjustable and include a pair of opposing coaxial flanges, one of which is axially movable relative to the other, is disclosed wherein both flanges of the drive sheave are provided with first and second belt engaging surfaces flaring radially outwardly with respect to each other so as to define first and second variable diameter belt receiving grooves therebetween. A dual range of velocity ratios between the drive sheave and the driven sheave is obtainable by selectively positioning a drive belt in the respective variable diameter belt receiving grooves.

Abstract: A transmission provided in a power transmitting system and having at least a transmission mechanism and a forward/reverse rotation changeover mechanism controlled on the basis of signals from a control section. The transmission includes a plurality of mechanical actuators (e.g., ball screw mechanisms) capable of converting torques into thrust forces to operate the transmission operation mechanisms by the thrust forces, a motor (e.g., an electric motor) serving as a common torque generation source for the mechanical actuators, a divergence mechanism for distributing and transmitting a torque from the motor to the mechanical actuators, and a changeover mechanism for transmitting the torque distributed from the divergence mechanism to at least one of the mechanical actuators.

Abstract: A continuously variable power transmission comprising rotatable input shaft attachable to rotating power means; rotatable output shaft providing driving axle means; and planetary power transmission train interconnecting said input shaft and said output shaft, said planetary power transmission train including a drive input assembly, a variable pulley assembly and a power control mechanism interconnected in such a manner as to permit alteration of the direction and speed of rotation of said output shaft by varying the drive ratio of the pulleys and the driving-driven relationship of the pulleys.

Abstract: A variable ratio power transmission comprising a variator and a geared drive operable in parallel along respective loading paths which unite at at least one gearset. In a first embodiment, the variator is rewindable between its ratio extremities of operation to begin a successive variable mode, while full power drive is maintained through an associated geartrain at substantially the same overall transmission ratio, thereby facilitating substantially stepless transition between successive modes. In a second embodiment, the input to a variator is switchable between its drivable elements at the ratio extremities of operation thereof to begin a successive variable mode, while full power drive is maintained through an associated geartrain at substantially the same overall transmission ratio, again facilitating substantially stepless transition between successive modes.

Abstract: A variable speed power transmission pulley and system are disclosed. The system includes a pair of spaced shafts each having a pulley keyed thereto, the effective diameter of which is adjustable. A flat band belt is entrained about annular elastomeric members carried on the surfaces of the pulleys to drivingly interconnect the pulleys. Each pulley includes a pair of slotted, interengaging conical pulley sections and the effective outer diameter of the pulley is variable by moving the conical sections axially toward or away from one another.

Abstract: A two belt drive system is disclosed for lawn and garden tractors and other vehicles especially of the type including a variable speed transmission/transaxle having a constant speed rotational input, a variable speed rotational input, and an output speed dependent on the rotational speed of the variable input. A first drive belt is mounted for rotation in one direction on an engine drive pulley, a first pulley on one of the transmission/transaxle inputs, and one pulley of a variable diameter pulley assembly. A second drive belt is mounted for rotation in the same direction as the first belt on a second pulley on the other transmission/transaxle input and the other pulley of the variable pulley assembly.