Abstract: A bicycle sprocket assembly comprises a plurality of sprockets and a first support element. The plurality of sprockets is arranged coaxially about a rotational center axis of the bicycle sprocket assembly. The plurality of sprockets includes a first sprocket. The first sprocket includes a first toothed ring and a first sprocket body at least partly disposed radially inwardly of the first toothed ring with respect to the rotational center axis. The first toothed ring is made of a first material. The first sprocket body is made of a second material that is different from the first material. The first support element extends from the first sprocket to a second sprocket adjacent to the first sprocket in an axial direction with respect to the rotational center axis. The first support element is made of a first additional material that is different from the second material.

Abstract: A drive disk with rim segments which are located at a distance from each other and are embodied in the form of segments of the groove track which are made from the same or different material and high-powered magnets are introduced in between the grooves in the drive disk rim and the cable along the peripheral line of the drive disk rim. Foamed steel or fiber composite ceramics or similar, respectively with increased friction values, are used as materials for the rim segments.

Abstract: An elevator hoisting rope set (3) suspends a counterweight (2) and an elevator car (1). The elevator has one or more rope pulleys provided with rope grooves, one of said rope pulleys being a traction sheave (7) that moves the hoisting ropes (3). At least the traction sheave (7) has against the hoisting rope (3) a coating adhesively attached to it and increasing the coefficient of friction. At least the traction sheave (7) and the hoisting ropes (3) together form a material pair in which the hoisting ropes (3) bite into the traction sheave (7), maintaining a grip sufficient for the operation of the elevator even in an exceptional situation where the coating (102) increasing the coefficient of friction on the surface of the traction sheave (7) is lost.

Abstract: A window treatment support, such as a support for a cellular shade and other kinds of shades, includes a head rail, a clutch mounted on the head rail to support and operate a window treatment; and a cord engaging the clutch for selectively raising and lowering the window treatment. The clutch includes a pulley having a plurality of radial teeth defining a space sized to receive the cord. At least some of the teeth including a flexible projection forming an interference fit with the cord. The head rail is a bottom wall shaped to maximize the size of the clutch without substantially affecting the size of the head rail.

Abstract: A pulley plate, a pulley and a belt drive system are disclosed. Each include a pulley plate or a pulley having an inner surface adapted to be driven about an axis of rotation and having a perimeter. The inner surface additionally includes a plurality of belt-wiping grooves at least partially between the axis and the perimeter. The plurality of belt-wiping grooves are located or patterned in the inner surface so as to contact the belt in different locations to reduce wear on the wall of the belt. In one embodiment, the plurality of belt-wiping grooves are centered about the axis and are unequally circumferentially spaced from one another. In another embodiment, the plurality of belt-wiping grooves are centered about a center offset from the axis.

Abstract: This invention relates to a chain driving means of round shaped stick comprising a chain of round shaped stick and a chain sprocket which is mutually geared to chain driving means of round shaped stick for its driving force, thus ensuring better durability and tensile strength.

Abstract: Pulley with automatic emergency brake including a disk (1) guiding the rope (3) having a pull (7) and a load leg (8), rotary supported by a suitable yoke (5), this pulley being provided with a double walled rocker arm (9), the outer walls of which are mounted on the yoke (5) by means of transverse pivot pins (10) off-centered with respect to the shaft axis (4) of the above disk (1) in the direction of the pull leg (7) of the rope.

Abstract: A pulley plate for use with an opposing pulley plate wherein the plates are configured so as to receive a belt therebetween. The pulley plate includes an inner surface and an outer surface. The inner surface is opposite the outer surface and is adapted for facing the opposing pulley plate. A belt-wiping surface obliquely extends from the inner surface and is located so as to engage the belt. The belt-wiping surface wipes the edges of the belt to increase the friction between the pulley plate and belt and so increase the efficiency of the pulley.

Abstract: A continuously variable transmission of an automotive vehicle comprises a primary pulley disposed on a power input shaft, and a secondary pulley disposed on a power output shaft. Each of the primary and secondary pulleys includes a fixed wheel counterpart having a first sheave surface, and a movable wheel counterpart having a second sheave surface. The first and second sheave surfaces face each other to form a pulley groove whose width is changeable with axial movement of the movable wheel counterpart. An endless belt is wound on the primary pulley and the secondary pulley so that the secondary pulley is drivably connected to the primary pulley. The belt includes a steel belt portion, and a plurality of steel elements supported on the steel belt portion and aligned along the steel belt portion. The respective steel elements are engageable in the pulley grooves of the primary pulley and the secondary pulley.

Abstract: A rear derailleur for a bicycle includes a base member for fixing to a bicycle frame, a movable member for supporting a chain guide, and a linkage mechanism coupling the base member to the movable member so that the movable member is capable of movement relative to the base member. A roller is coupled to the base member for rotation about a rotation axis, wherein the roller includes a cable guiding surface for guiding an inner wire of a control cable. A casing support is provided for supporting an outer casing of the control cable, and a pivot coupling pivotally supports the casing support to the base member so that the casing support pivots around a pivot axis that is spaced apart from the rotation axis.

Abstract: An accessory drive system for an internal combustion engine includes a multi-ribbed belt and pulley system. Shear generators are machined, formed or molded and extend axially from the driving pulley's faces such that the shear generators expand the drive belt in a plurality of regions. The shear generators are formed as either spheroids projecting into the V of the V-pulley such that the spheroids extend from two faces of adjacent grooves at approximately the midpoint between the root and apex of the V, or as shifted circumferential grooves of a multi-ribbed pulley having a continuous wave pattern. These shear generators cause a plurality of localized high tension regions at the highest pressure zone of the belt/pulley friction interface, improving circumferential friction, and therefore torque capacity, with minimal effect on belt wear due to their smoothness.

Abstract: A drive power transmission element in which a wheel has a peripheral surface provided with a unique groove structure for receiving a power transmission element such as a drive belt, rope, cable, or other compressible element. The wheel is provided with a groove having a particular configuration in the shape of a trochoidal curve. Since the compressible element or belt is of a compressible material, the drive belt or compressible element will be compressed into the groove of the drive wheel so that it is driven by compression of the belt or element, not friction.

Abstract: A hauling block 20 having a sheave 30 comprising two identical halves 32 and 34. The hauling surfaces 40 and 42 of the sheave 30 carry outwardly extending, cleat receiving pockets 54. Reinforced cleats 50 are seated in the pockets 54 and releasably fastened to the sheave 30.

Abstract: A pulley is described for hauling strands of rope or chain and for engaging a splice coupling a strand of rope to a strand of chain. A plurality of pockets are arranged about the periphery of the pulley for positively engaging every other chain link. A plurality of pairs of rope-engaging surfaces are located between adjacent pockets and within the pockets. Rope and chain occupy substantially the same diameter of the pulley resulting in substantially the same speed and torque characteristics whether rope or chain is being hauled.

Abstract: A pulley is constructed from a pair of identical pulley halves, each having a central opening with a series of notches extending therefrom. A hub member extends through the pulley half openings, and outwardly deformed rings are formed in a side wall of the hub member to sandwich portions of the pulley halves thererbetween adjacent the openings in the pulley halves. The rings are formed in a bulging process. The rings deflect inwardly into the notches, to prevent the pulley halves from rotating relative to each other when the pulley halves are assembled together.

Abstract: A sheave for engaging strand materials such as textile fabric yarns and the like. The sheave has spoke members transferring torques to and from a hub under compression and tension loading. The sheave also has an annular strand engaging groove with abutments for enhancing gripping engagement with a strand.

Abstract: A ball chain positive drive stepless transmission comprising two V sheaves deployed on a pair of parallel shafts and an endless ball chain serving as transmission medium therebetween and characterized in, each sheave having a V shaped groove formed by two opposite bevel members with an undulating surface readily disposed thereon. Each link of the chain has a ball set adapted to be positively engaged with the undulating surface and also to enable the stepless change of speed while the unit is at rest.