Abstract: A drive clutch having a compressible torque transfer mechanism configured to transfer torque from an engine or motor to a moveable sheave and configured to reduce wear on components of the drive clutch by eliminating sliding contact between surfaces to transfer torque and change the gear ratio. The torque transfer mechanism increases efficiency and reduces wear and may comprise a torque bellows, which is configured to transfer torque from the engine to the moveable sheave upon radial compression of the torque bellows. Sliding blocks and corresponding slide tracks are concentrically positioned between the moveable sheave and the shift plate and centrifugal force provides a force for linear movement for the sliding blocks, which results in movement of the moveable sheave and the cover, which can act to compress the torque bellows. This configuration reduces costs because precise machining is not needed and reduces premature wear and tear on the drive clutch.

Abstract: An actuation device (1) comprising a threaded shaft (2) connected at one end to driving means adapted to allow the threaded shaft (2) to rotate about its longitudinal axis (a). A movable element (3) is provided with a cylindrical cavity (30) adapted to receive the threaded shaft (2), and configured so that a rotation of the threaded shaft (2) corresponds to a translation the movable element (3) along the longitudinal axis (a). The device (1) has two guiding rods (4,4?) coupled to the movable element (3) and adapted to constrain the translation of the latter along a direction parallel to the longitudinal axis (a). Element (3) comprises a first (31) and a second (32) element constrained to each other, wherein the first element (31) is coupled to the threaded shaft (2) and the second element (32) is coupled to the two guiding rods (4,4?).

Abstract: A drive clutch having a compressible torque transfer mechanism configured to transfer torque from an engine or motor to a moveable sheave and configured to reduce wear on components of the drive clutch by eliminating sliding contact between surfaces to transfer torque and change the gear ratio. The torque transfer mechanism increases efficiency and reduces wear and may comprise a torque bellows, which is configured to transfer torque from the engine to the moveable sheave upon radial compression of the torque bellows. Sliding blocks and corresponding slide tracks are concentrically positioned between the moveable sheave and the shift plate and centrifugal force provides a force for linear movement for the sliding blocks, which results in movement of the moveable sheave and the cover, which can act to compress the torque bellows. This configuration reduces costs because precise machining is not needed and reduces premature wear and tear on the drive clutch.

Abstract: In one example, a transmission is provided that includes a sheave of selectively variable configuration, a driven member configured to engage the sheave, and a plurality of drive members configured for radial movement to selectively engage the driven member. The transmission may be operable in one or more of the following modes: traction mode, integer mode, IN mode, and infinite mode.

Abstract: A continuously variable conical pulley transmission having pairs of conical pulleys which are rotationally fixedly arranged on drive input and drive output shafts and of which in each case one is fixed to the shaft and one is axially movable, and between which a traction mechanism belt for power transmission circulates. In order that it is not necessary to provide otherwise unutilized regions of the conical pulley surfaces to allow for corresponding wear, it is proposed that a stop for limiting the transmission ratio, which stop acts substantially in the radial direction on the traction mechanism belt, be provided in at least one conical pulley pair. It is intended in particular that the peripheral surface of the drive input shaft serves as a stop. It is also proposed that a chain as a traction mechanism belt be correspondingly matched to a device of said type by virtue of the contour of the links of said chain being matched to the contour of the drive input shaft.

Abstract: To obtain a compact structure and to increase at the same time the structural stiffness of an apparatus for plastically deforming and strengthening the links, which are intercoupled by rocker pins, of a complete endless transmission chain, said apparatus comprises a first and a second pair respectively of conical supporting surfaces for the ends which protrude outside said links of the rocker pins of a transmission chain, mounted thereon, said surfaces having a controllable mutual distance, the invention propose to add a third similar pair of supporting surfaces, provided for cooperation with the first and second shaft. This measure also speeds up the treatment of the transmission chain.

Abstract: A clutching mechanism (20) for a cultivating tiller. The tiller has an engine (16) mounted on a frame (12) with a rotatable output shaft (40), a rotatable working shaft (22), and a transmission (18) operatively connecting to the working shaft, the transmission having a rotatable transmission shaft (42) coaxially aligned with the output shaft of the engine. The clutching mechanism includes an upper half pulley (52) attached to the output shaft, and a lower half pulley (54) attached to the transmission shaft, wherein the upper half pulley and lower half pulley are coaxially positioned in a facing but non-contacting relationship such that the upper half pulley is able to freely rotate with respect to the lower half pulley. The clutching mechanism also includes a belt (62) positioned between the upper half pulley and the lower half pulley, and a tensioning assembly (70) configured to selectively tension the belt so that the belt transmits rotation of the upper half pulley to the lower half pulley.

Abstract: Rotational position adjuster systems that can increase the performance of CVTs that suffer from either or both transition flexing and a limited duration at which the transmission ratio can be changed by providing proper rotational adjustment.

Abstract: A pulley assembly for a continuously variable transmission in a vehicle, comprising a shaft having an axis, a supporting element rotatable about said axis, a first half pulley rigidly and rotationally connected to said supporting element, a second half pulley facing said first half pulley for defining a seat adapted to accommodate a belt of the transmission, at least one of the first and second half pulleys being longitudinally mobile with respect to the supporting element, and a clutch comprising a second supporting element connected to the shaft, a drum connected to the supporting element and accommodating the second supporting element, and a plurality of friction elements hinged to the second supporting element about respective hinge axes to selectively cooperate with the drum. In particular, the respective centres of gravity of said friction elements are located before the respective hinge axes with respect to a direction of rotation of the shaft which defines a forward running condition of the vehicle.

Abstract: Rotational position adjuster systems that can increase the performance of CVTs that suffer from either or both transition flexing and a limited duration at which the transmission ratio can be changed by providing proper rotational adjustment.

Abstract: A torque vectoring drive system is presented for use in a motor vehicle. The torque vectoring drive system includes a differential unit having an input shaft, a first axle shaft, a second axle shaft, and a carrier, the differential rotatably driving the axle shafts while permitting the axle shafts to have independent speeds of rotation. The system includes a continuously variable transmission (CVT) having an input shaft driveably coupled to the carrier of the differential and an output shaft driveably coupled to the first axle shaft of the differential. The CVT is operable to variably control the drive torque of the first axle shaft relative to the second axle shaft to provide torque vectoring.

Abstract: In an actuator, displacement resistance in axial movement of a slider is reduced to improve durability and enhance maintainability. At each side of the actuator, a slit is made between a top cover and a side cover. Magnetic bodies are provided on the surfaces of both side walls of the slit which face a fixing block of a slider and a magnetic fluid with a viscosity, surface tension, etc. is held between the magnetic bodies. At each side, the fixing block of the slider axially moves along the slit which is closed by the magnetic bodies.

Abstract: A gear reducer having a hollow shaft is telescopically mounted on the upper end of a vertical conveyor drive shaft. The gear reducer is removed for repair by raising the gear reducer housing to separate the hollow shaft from the drive shaft while the drive shaft remains on the drive frame.

Abstract: The invention relates to a pulley, in particular for a continuously variable transmission, provided with two sheaves on a pulley shaft, the sheaves being non-rotationally fixable on the pulley shaft, and at least one sheave being axially movable relative to the pulley shaft by means of movement means.According to the invention, the movable sheave is placed on the pulley shaft in such a way that, if the movement means impose a stable position on the sheave, the sheave is fixed axially relative to the pulley shaft and that, if the movement means impose a change in the axial position of the sheave, the sheave is movable in the axial direction and/or in the direction of rotation relative to the pulley shaft.

Abstract: An adjustable sheave including at least one pair of annular belt grooves defining annular discoidal flange members relatively movable on an end threaded hub support through an annular adjusting ring threadedly mounted on the threaded hub support end, the adjusting ring including locking means cooperable with one of the pair of flange members to tighten and bind the threads of the adjusting ring to the engaged threads of the hub support end.

Abstract: In a continuously variable belt transmission wherein each of primary and secondary pulley devices consists of a stationary pulley and a movable pulley, and wherein the movable pulley is furnished with a hydraulic servo system having a cylinder which is connected at one end with the movable pulley, and a plunger which slides liquid-tightly within the cylinder; a pulley assembly for a continuously variable belt transmission (1) comprising the fact that the end (19b) of the cylinder (19) to be connected with the movable pulley (10b) of the secondary pulley device is formed with a clinch portion (19f) whose inside diameter is made larger than the outside diameter of the sliding part (16b, 18) of the plunger (16). In connecting the cylinder (19) to the movable pulley (10b) while covering the plunger (16) which is attached to the secondary shaft (5) of the transmission (1), the oil seal ring (18) of the plunger (16) is not nibbled.

Abstract: Several embodiments of snowmobiles driven by an engine and variable belt transmission mechanism wherein the variable belt transmission has its input shaft journaled for rotation in the crankcase of the engine and driven from the engine crankshaft through a gear reduction so that the transmission loads are not carried by the crankshaft and wherein the crankshaft torsional vibrations are not transmitted to the transmission input shaft.

Abstract: In a variable speed transmission of the pulley type, one of the pulley cheeks is movable axially with respect to the other which is stationary. The movable cheek faces a reaction cup which is solid with the stationary cheek. The cup and the movable cheek are formed with converging cam surfaces which define between them a chamber into which are disposed centrifugal weights having ends sliding on the cam surfaces. When the pulley and reaction cup rotate, the weights are thrown outward and force the movable cheek toward the stationary one. According to the invention, the cam surface of the reaction cup is concave, having a radius of curvature of predetermined length. On the other hand, the end edges of the centrifugal weights slidable on the cam surface of the reaction cup are convex and have a radius of curvature shorter than said predetermined length so that the ends of the weights bear only on a limited part of the cam surface of the reaction cup.

Abstract: A refrigeration system includes a compressor, a motor, variable pitch pulleys mounted on the ends of the compressor and motor shafts, and an endless belt looped around the motor and compressor pulleys for drivingly connecting the motor to the compressor. A sensor determines a variance in a refrigerant characteristic of the system from a predetermined value. An electrically powered actuator is responsive to the sensor and effects axial movement to one pulley component of the motor for thereby changing the pitch diameter of the motor pulley and to in turn vary the pitch diameter of the pulley on the compressor so as to change the speed of rotation of the compressor.

Abstract: A belt-type stepless speed shifting transmission consisting of: (1) an input section having an input shaft with a rotational axis, a stationary pulley piece fixedly mounted on the input shaft, a pulley piece mounted on the input shaft and movable axially relative to the input shaft and stationary pulley piece with the stationary and movable pulley pieces cooperatively defining a groove for reception of a belt, and bearing structure for exerting an axial force on the movable pulley piece in the direction of the stationary pulley piece which axial force increases with the speed of the input shaft; and (2) an output section having an output shaft with a rotational axis, a second stationary piece fixedly mounted on the output shaft, a second pulley piece mounted on the output shaft and movable axially relative to the output shaft and second stationary pulley piece with the second stationary and movable pulley pieces cooperatively defining a groove for reception of a belt, a stop element, and cooperating cams on t

Abstract: In an infinitely variable transmission with discs (1, 2) the movable disc (2) is connected to a cylinder wall (11), which together with a piston (3) encloses a fluid filled cylinder space (4). A sealing ring (6, 15, 17) provides one or more calibrated openings (14, 16) between the piston and the cylinder wall, so that as a result of the continuous relative movement, between the piston with sealing ring and the cylinder wall, during actuation of the transmission the calibrated openings are automatically scraped clean.

Abstract: An automatic variable speed centrifugal clutch with belt tightening assembly is characterized by even transmission of rotational drive to a pair of belts and includes a rotating spindle and clutch plate having an adjustable centrifugally operable belt tightening mechanism. The belt tightening mechanism includes a clutch drum and a spacer which define recesses for receiving the belts to be driven. Slide rails slidably inserted through slide rail holes in the clutch drum and spacer, and connected at their ends to the clutch plate and spindle flange rotationally interlock the clutch assembly yet allow for longitudinal displacement of the clutch drum and spacer means relative to the spindle flange. As the spindle rotates, the clutch drum presses the spacer against a flange of the spindle to evenly drive the belts while compensating for differences in belt size.

Abstract: A device for transmitting the position of a drivebelt pulley of a continually variable automatic transmission to a valve arrangement includes a lever assembly extending between the valve and a variable displacement abutment connected to a sensor foot contacting the pulley. The position of the sensor foot is displaceable on an axial guide rod according to the position of a threaded bushing. The position of the pedal is adjustable from outside the transmission housing by rotating a tool that turns a setting sleeve rotatably fixed to the guide rod. As the guide rod turns, the bushing, engaged with threads on the sensor foot, changes the position of the abutment contacted by the lever assembly.

Abstract: Rotation speed of automotive auxiliary machines is controlled by a drive pulley provided on a crank shaft and a driven pulley communicating with the drive pulley through a V-belt. The drive pulley comprises a rigid pulley secured on a drive shaft, a guide holder to be rotated together with the drive shaft by a mount bolt, and a slide pulley axially-movably located between the guide holder and the rigid pulley. The slide pulley provides a power piston to be moved along a guide holder shaft. The power piston, the guide holder flange, and the slide pulley define a power piston chamber.Inside of the power piston chamber are located a flyweight to be moved by centrifugal force and a servo valve to be axially moved by the flyweight. The servo valve is fitted on the outer peripheral surface of the power piston.

Abstract: Infinitely variable transmission comprising a primary pulley fitted on a drive-shaft and a secondary pulley fitted on a driven shaft, both pulleys consisting of two conical opposed discs of which one is movable along the shaft on which it is fitted, a V-belt being looped over both pulleys, wherein the center lines of the pulleys are offset when the transmission is in its medium position and are in line when the transmission is the lower ratio range.

Abstract: An agricultural machine has two power transmission lines, one of which includes a disk type frictional stepless change speed apparatus and the other of which includes a belt transmission apparatus. The disk type frictional stepless change speed apparatus comprises a drive disk formed integrally with a split pulley of the belt transmission apparatus, a driven disk in pressure contact with and receiving power from the drive disk, a driven shaft slidably carrying the driven disk, and stays for supporting the driven shaft, the stays being oscillatable about an axis parallel to the driven shaft to permit the driven disk to be released from pressure contact with the drive disk. The agricultural machine further includes a mechanism for sliding the driven disk to effect speed changing.

Abstract: The present invention is directed to a lawn mower wherein a lawn mower body frame includes a motor and an operatively connected transmission. The lawn mower motor body frame is supported by front and rear wheels. At least the rear wheels are independently supported on separate shafts which are rotatably disposed with respect to the lawn mower body frame. Pulleys are positioned concentrically on each of the separate shafts in opposing, spaced apart relationship to define a gap therebetween. A belt is disposed in said gap and operatively connected to the motor through the transmission to impart rotation to the rear wheels. The pulleys, the separate shafts, and the rear wheels are positioned relative to each other to permit slippage therebetween to facilitate a change in the direction of the lawn mower.