A transmission element for a transmission such as a continuously variable transmission, including an elongate flexible endless carrier element provided with a number of receiving spaces with an opening and with a passage extending through the number of receiving spaces in the longitudinal direction of the carrier element, a number of engaging elements which are each received in a receiving space for movement between an active position and a passive position and which in the active position protrude further inward than in the passive position and at least out of the opening of this receiving space so as to be able to engage in the active position with a pulley of the transmission, and a spring element for providing resistance for each of the number of engaging elements during movement from the active position in the direction of the passive position.

A split drive sprocket assembly includes: a first sprocket portion and a second sprocket portion configured to be joined along an opposing mating surface to form a cylindrical sprocket body; a series of teeth extending radially from a circumferential end of the first sprocket portion and the second sprocket portion; a first shoulder connected to the first sprocket portion and extending radially so as to extend from an axial further than the teeth extends from the axial and spaced axially apart from the teeth; a second shoulder connected to the second sprocket portion and extending radially so as to extend from the axial further than the teeth extends from the axial and spaced axially apart from the teeth. The first sprocket portion and the second sprocket portion are configured to engage a belt with the teeth and the first and second shoulder are configured to overlap with the belt while the teeth are engaged with the belt.

A sprocket (10) is capable of engaging with engaging portions (22) on an elastic endless belt (21). On a tooth face (F) of a tooth (12) of the sprocket (10), a portion of a tooth base on at least one side of a center line (O.sub.1) of the tooth (12) is a tooth base surface (12b), and the tooth base surface (12b) is inclined relative to the center line (O.sub.1) of the tooth (12) at an angle (A.sub.1) in a range of 0° or greater to 7.5° or less so as to approach the center line (O.sub.1) of the tooth (12) towards a tooth tip surface (12d).

A high torque sprocket includes a body defining an outer periphery and a hub section defining an inner surface for engaging a bushing. A continuous toothed structure is disposed on the outer periphery of the body, and a textile reinforcement embedded in the body adjacent the inner surface of the hub section. The body is formed of a castable polymer material. In some cases, one or two optional flanges are disposed on side(s) of the body immediately adjacent the continuous toothed structure, in some aspects, a textile reinforcement may be embedded in a surface of the flange(s) immediately adjacent the continuous toothed structure. In some aspects, the high torque sprocket further includes a textile reinforcement embedded in the continuous toothed structure outer surface, and the textile reinforcement is selected from nylon, cotton, aramid, PTFE, and mixtures thereof.

A sprocket system including a sprocket assembled from multiple disc sprockets coaxially aligned and secured together to provide a desired axial width for the sprocket is described. In some embodiments, the sprocket described herein is a hub-less sprocket.

A torsionally compliant sprocket system includes a first sprocket (250); a second sprocket (230) mounted in side-by-side relation to the first sprocket (250); a resilient member (270) that resiliently couples the second sprocket (230) to the first sprocket (250) to allow limited angular rotation of the second sprocket (230) with respect to the first sprocket (250); and a locking structure (300, 600, 700) that is biased toward an engaged position in which angular motion of the second sprocket (230) with respect to the first sprocket (250) is restrained and moves in response to rotation of the first sprocket (250) to a disengaged position in which angular motion of the second sprocket (230) with respect to the first sprocket (250) is permitted.

A vehicle includes a power plant, continuously variable transmission (CVT), drive wheels, sensors, and controller. The CVT achieves a fixed gear/positive engagement and friction drive modes, and includes an input member that receives input torque from the power plant, an output member, and a variator assembly having drive and driven variator pulleys. The pulleys are connected to each other via an endless rotatable drive element, and to a respective one of the input and output members. Pulley actuators change a CVT speed ratio. The controller calculates a relative slip of the pulleys using measured speeds and displacements from the sensors, reduces the relative slip until the relative slip is below a calibrated speed limit or within a calibrated speed range via actuator control signal to the pulley actuators, and commands the fixed gear/positive engagement mode via positive engagement control signals to the CVT until the relative slip reaches zero.

The present disclosure provides a sprocket structure of an engine including a crank sprocket provided in a cylinder block of an engine and driven by a crank shaft, a high pressure pump sprocket configured to receive rotational force from the crank sprocket through a timing belt, and a cam sprocket having an interior installed on a camshaft and an exterior rotatably coupled to the timing belt so as to be driven. Since a tensioner is fixed in a state in which tension is applied to the timing belt through jigs of the crank sprocket and the high pressure pump sprocket and the cam sprocket having a dual-structure, loss of tension is reduced, thus minimizing occurrence of an error of the timing belt to enhance quality of a product.

An apparatus for raising and lowering a cutting tool within a decoking drum, a decoking system and a method of raising and lowering a decoking system cutting tool. Instead of using metallic ropes, chains, or a self-propelled gear-based approach, non-metallic belts are secured at respective ends to a crosshead and one or more counterweights to enable vertical movement of the crosshead that in turn permits vertical movement of the cutting tool throughout the height of the drum. A motorized pulley system controls the movement of the belt, and preferably avoids having the motor be carried by the crosshead. The belts on each pulley are preferably arranged as cooperative sets so that within each set, both primary load belts and secondary load belts are present. Enhanced engagement between at least the primary load belts and the pulleys promotes greater load-bearing capability, while the secondary load belts are sufficiently strong to ensure positional stability of the crosshead and decoking tool upon damage to or failure of one or more of the primary load belts.

The invention relates to a chainwheel (1, 1′) for transferring a drive output from an input shaft, more particularly from a drum motor (800), onto a synthetic modular belt (900), a drum motor (800) for driving a synthetic modular belt, a semi-finished chainwheel product (10) for a chainwheel (1, 1′) and a method for producing a chainwheel (1, 1′). The chainwheel comprises at least one toothed ring and an outer ring (200, 200′) and an inner ring (300, 300′) adjoining the toothed ring, wherein the inner ring (300, 300′) and the outer ring (200, 200′) are connected to one another via bridges (410, 410′).