The present invention has a mechanical rotation drive mechanism (50) that drives rotation of at least one rotation pinion sprocket (22; 23) on its axis from among a plurality of pinion sprockets (20). The mechanical rotation drive mechanism (50) drives the rotation of at least one rotation pinion sprocket (22; 23) on its axis in concert with a sprocket movement mechanism (40A) so as to eliminate a phase shift, associated with a radial direction movement of the plurality of pinion sprockets (20) by the sprocket movement mechanism (40A), of the plurality of pinion sprockets (20) with respect to a chain (6).

A segmented pulley defining an outer peripheral surface for engaging an endless member of a segmented pulley transmission is provided. The segmented pulley comprises: a plurality of pulley segments configured to be sequentially movable between an engaged region and a disengaged region to transition the endless member between the segmented pulley and a concentric pulley in the segmented pulley transmission, each of the pulley segments having a body defining a portion of the outer peripheral surface. The plurality of pulley segments includes a transition segment having an integrated support extending from the body of the transition segment, the integrated support being configured to support the endless member when transitioning the endless member between the segmented pulley and the adjacent pulley in the segmented pulley transmission. A segmented pulley transmission comprising the segmented pulley is further provided.

A continuously variable transmission including an input pulley having a first subassembly supported upon a first rotatably driven shaft and an output pulley having a second subassembly supported upon a second rotatable shaft. Each subassembly includes a plurality of left link elements extending from segmented pulley segments to a first shaft supported rotating element, along with a plurality of right link elements extending from the segmented pulley segments to a second shaft supported rotated element for positioning the segmented pulley segments in an outwardly circumferentially arrayed fashion about each of the first and second shafts. Axial displacement of a first and second pairs of said first and second shaft supporting elements in each of the input and output pulley subassemblies inversely varying a collective diameter formed by said arrangements of segmented pulley segments in order to maintain a constant circumference of a belt supported about the segmented pulley segments for each of the input and output pulleys.

A continuously variable transmission including an input pulley having a first subassembly supported upon a first rotatably driven shaft and an output pulley having a second subassembly supported upon a second rotatable shaft. Each subassembly includes a plurality of left link elements extending from segmented pulley segments to a first shaft supported rotating element, along with a plurality of right link elements extending from the segmented pulley segments to a second shaft supported rotated element for positioning the segmented pulley segments in an outwardly circumferentially arrayed fashion about each of the first and second shafts. Axial displacement of a first and second pairs of said first and second shaft supporting elements in each of the input and output pulley subassemblies inversely varying a collective diameter formed by said arrangements of segmented pulley segments in order to maintain a constant circumference of a belt supported about the segmented pulley segments for each of the input and output pulleys.

An air-cooled heat exchanger has a frame assembly, a plenum supported by the frame assembly, an engine and a fan assembly. The engine includes a drive shaft and the fan assembly includes a fan connected to a fan shaft. The fan assembly is configured to move air through the plenum. The air-cooled heat exchanger also includes a drive assembly connected between the engine and the fan assembly. The drive assembly has a fan shaft sheave connected to the fan shaft, a driver sheave connected to the drive shaft, an idler pulley, and a drive belt in contact with the fan shaft sheave, driver sheave and idler pulley. The air-cooled heat exchanger has an idler bearing adjustment mechanism that is configured to adjust tension on the drive belt by adjusting the position of the idler pulley relative to the drive belt.

An air-cooled heat exchanger has a frame assembly, a plenum supported by the frame assembly, an engine and a fan assembly. The engine includes a drive shaft and the fan assembly includes a fan connected to a fan shaft. The fan assembly is configured to move air through the plenum. The air-cooled heat exchanger also includes a drive assembly connected between the engine and the fan assembly. The drive assembly has a fan shaft sheave connected to the fan shaft, a driver sheave connected to the drive shaft, an idler pulley, and a drive belt in contact with the fan shaft sheave, driver sheave and idler pulley. The air-cooled heat exchanger has an idler bearing adjustment mechanism that is configured to adjust tension on the drive belt by adjusting the position of the idler pulley relative to the drive belt.

An improvement to continuously variable transmissions whereby power is transmitted from a driver axle to a driven axle through a variable transmission mechanism. A plurality of unidirectional sprocket wheels positioned radially around a driver axle within a set of frustoconical members is provided so that the distance from the driver axle can be adjusted. The unidirectional sprocket wheels are connected by a chain to a similar driven axle portion. This low vibration, high torque capable transmission is superior to variable transmissions that rely on friction-based power transmissions that can slip during operation.

The (VDS.Math.CVT) is a continuously variable transmission. This mechanism consists of two sets variable diameter shaft, one sun gear set. On each shaft sets are mounted a number of the guide rods on shafts, some movable sets that any of them placed on each pair guide rods, two guide disks with some curve grooves on surface, by rotation of disks, the diameters of shaft will be changes. Variation's diameters in two shaft sets are Continuous. The variations ratio of the rotational speed between two shaft sets are continuous. Secondary shaft connected with one components of sun gear set, and second component of sun gear set connected with input shaft and third component of sun gear set connected with output shaft. Because the variations of the rotational speed on the secondary shaft is continuous, the variations of the rotational speed on the output shaft will be continuously.

The (VDS.Math.CVT) is a continuously variable transmission. This mechanism consists of two sets variable diameter shaft, one sun gear set. On each shaft sets are mounted a number of the guide rods on shafts, some movable sets that any of them placed on each pair guide rods, two guide disks with some curve grooves on surface, by rotation of disks, the diameters of shaft will be changes. Variation's diameters in two shaft sets are Continuous. The variations ratio of the rotational speed between two shaft sets are continuous. Secondary shaft connected with one components of sun gear set, and second component of sun gear set connected with input shaft and third component of sun gear set connected with output shaft. Because the variations of the rotational speed on the secondary shaft is continuous, the variations of the rotational speed on the output shaft will be continuously.

The invention relates to a transmission comprising two circulating elements and a transmission element, such as a toothed belt. At least one circulating element comprises a number of contact elements for contact with the transmission element which determine a running radius of the transmission element, a radial guide for the contact elements, along which the latter are radially displaceable, displacement means for displacing the contact elements in the radial direction, wherein the transmission element has engagement elements such as teeth. Each of the contact elements comprises a base part which is in contact with the radial guide and with the displacement means, and an engagement member which is connected to the base part and is radially movable with respect to the base part, wherein the engagement member of at least one of the number of contact elements of the respective circulating element is in positive-locking contact with the transmission element.