Abstract: An inverted tooth chain drive system includes a sprocket supported for rotation about an axis of rotation and including a plurality of teeth defined relative to respective tooth centers. The tooth centers are spaced evenly in a circumferential arrangement about the axis of rotation, and each of the plurality of teeth includes an engaging flank. An inverted tooth chain is engaged with the sprocket and includes a plurality of rows of links each structured for inside flank engagement with the sprocket, with leading inside flanks of each row of links projecting outwardly relative to the trailing outside flanks of a preceding row of links. The leading inside flanks of each row are positioned to make initial meshing contact with the engaging flank of one of the sprocket teeth. At least some of the teeth are standard teeth and other ones of the teeth are flank-relieved teeth.

Abstract: An inverted tooth chain drive system includes an inverted tooth chain structured for inside flank engagement. The chain includes link rows each including leading inside flanks that project outwardly relative to trailing outside flanks of a preceding link row. The system further includes a sprocket with which said inverted tooth chain is drivingly engaged. The sprocket includes a plurality of teeth circumferentially spaced about an axis of rotation, each tooth comprising an engaging flank and a disengaging flank. Some of the teeth are defined with a first tooth form in which said engaging flank thereof is defined with a first pressure angle and others of said teeth are defined with a second tooth form in which the engaging flank thereof is defined with a second pressure angle that is different from the first pressure angle in order to stagger or modulate the initial meshing impacts between the leading inside flanks of the chain and engaging flanks of the sprocket teeth.

Abstract: The present invention aims at a chain and chainwheel set capable of positive rotational transmission and reverse rotational sliding, in which a novel positive rotational transmission forced recessed face at chain tooth root portion (104) is formed, and a reverse rotational forced sliding chain tooth face (114) capable of sliding is formed while a reverse rotational chain tooth face being coupled with the chain, so when the chain drives the chainwheel in the positive rotational direction, a chain roller (110) sleeved on a chain connecting pivot shaft (109) is tightly engaged at the forced recessed face at chain tooth root portion for transmitting rotational kinetic power, when the chainwheel is driven in the reverse rotational direction, a sliding state is generated between the reverse rotational forced sliding chain tooth face (114) and the chain (106).

Abstract: A bracket assembly for mounting a link chain includes first and second opposed mirror image brackets each bracket having a uniformly thick base flange for mounting on a surface for support and an upstanding transverse link attachment flange which includes spaced openings symmetrically positioned for replication of a chain link plate and for attachment of the plates of a chain link to a pair of opposed spaced brackets.

Abstract: A roller chain assembly includes an attachment chain having links that carry bent leg plates extending over a frame. The leg plates each carry a number of roller pins supporting the plate against the frame at predetermined, multiple points on the plate. The chain links have connecting pins extending outwardly from the chain links that are received in grooves formed in the frame.

Abstract: A solitary chainring of a bicycle front crankset for engaging a drive chain, including a plurality of teeth formed about a periphery of the chainring, the plurality of teeth consisting of an even number. The plurality of teeth includes a first group of teeth and a second group of teeth arranged alternatingly between the first group of teeth. The first group of teeth and the second group of teeth are equal in number. Each of the first and second group of teeth include an outboard side and an inboard side opposite the outboard side and each tooth of the first group of teeth includes at least a first protrusion on the outboard side thereof and each tooth of the second group of teeth are free of the first protrusions on the outboard side and the inboard side.

Abstract: A randomized chain sprocket has a set of four tooth gaps having three different tooth gap radial locations, two different link angles, and a chain with constant link pitch.

Abstract: In chain and sprocket systems with at least two resonance modes, two or more tension reducing sprockets are oriented to cancel each other at a first resonance mode and have no effect to increase tensions at such first resonance mode. The tension reduction sprockets, however, are oriented with each other so that tensions will be reduced at a second resonance mode. Hence, two or more tension reducing sprockets are used to reduce tensions at a second resonance mode from sources outside the chain and sprocket system while minimizing tension increases at first resonance mode.

Abstract: The present invention relates to a sprocket for use with a bicycle, the sprocket for use with a multi-sprocket assembly and chain, wherein the sprocket is made from a light but comparatively soft material and does not have shifting aids in the form of recesses and notches on the sprocket teeth where the chain rollers are in contact with the load flanks of the teeth.

Abstract: An operation apparatus of a sunlight shielding apparatus is provided which is equipped with a fail-safe function so as not to hinder behavior of a dweller or the like, and, in usual operation, unnecessary activation of the fail-safe function is prevented, so that enhanced operability can be realized.

Abstract: Drive-train sprockets engage chains having a plurality of links joined by a corresponding plurality of pinned connections spaced longitudinally of each other along the chain. In a specific example, the links have a clevis-like portion and an arcuate segment defining a drive-surface with a characteristic outer diameter, and the arcuate segment of the first link pivotally engages the clevis-like portion of the second link to form the pinned connection. The arcuate segment extends circumferentially about only a portion of the pivot axis by an angle. The drive-train sprockets have a body having a root diameter corresponding to at least a characteristic outer diameter of the arcuate segment and the angle by which each arcuate segment extends circumferentially about the corresponding pivot axis.

Abstract: A randomized chain sprocket has a set of four tooth gaps having three different tooth gap radial locations, two different link angles, and a chain with constant link pitch.

Abstract: In a silent chain transmission, the distance between the centers of front and rear pin holes of each of the inner link plates of the chain is smaller than the length of the smallest chord obtained by dividing, by the number of sprocket teeth, the circumference of a circle having a radius extending from the center of the sprocket to the center of a pin hole of a link plate of the chain when the last-mentioned link plate is fully engaged with the sprocket.

Abstract: A belt and chain drive for vehicles or for use in drive technology with an input shaft and an output shaft supported on a frame, the input shaft and the output shaft project out of the frame, with the following features: a) gear transmissions with gear wheels, which are embodied as belt and chain drives, are located between the input shaft and the output shaft, b) all of the gear wheels are constantly in rotation during operation, c) the gear transmissions located between the input shaft and the output shaft are embodied as belt and chain drives with toothed belts as traction mechanisms and with pulleys as gear wheels, d) the traction mechanism are reinforced with aramide, Kevlar, carbon fibers or other fibrous materials, is characterized in that e) the traction mechanism is pressed into a kidney-like shape onto the pulleys by at least one component during no-load rotation, and that under the effect of load this component does not touch the traction mechanism, and f) the kidney-like shape of the traction mech

Abstract: A sprocket assembly defining a sprocket assembly width. The assembly has at least eleven sprockets and the sprocket assembly mounts to a bicycle freewheel hub that rotates about a rotation axis which defines a predetermined axial distance on the hub between a plane that is substantially perpendicular to the rotation axis. At least one point of the attachment seats for spokes closest to the freewheel body and a plane is substantially perpendicular to the rotation axis and defined in the fastening portion to the frame. The sprocket assembly width is lower than or equal to the predetermined axial distance. A chain that engages the sprockets has a maximum thickness in the direction of the rotation axis between and including 4.6 mm and 5.8 mm.

Abstract: In a timing chain drive, a hybrid driving sprocket, having roller-engaging teeth and side sprocket teeth, cooperates with a hybrid chain having rollers that mesh with the roller-engaging teeth and toothed link plates that mesh with the side sprocket teeth. A driven sprocket from which the chain travels toward the driving sprocket has a cyclically varying tooth pitch that compensates for tension variations due to cyclic variations in the rotational speed of the driving sprocket or to cyclic variations in the load applied to the driven sprocket. The driven sprocket can be a roller sprocket or a hybrid sprocket having roller-engaging teeth and side sprocket teeth for engagement with the teeth on the link plates of the chain.

Abstract: A sprocket includes a plurality of teeth spaced about its periphery, roots located between pairs of adjacent teeth, and a cushion ring contacted by a chain engaging the sprocket teeth. The roots have root radii defined as the distance between the center of sprocket and the point along the root closest to the sprocket center in the radial direction. In some embodiments, the roots have three distinct radii. The cushioning material of the cushion ring receives the impact while engaging the chain. In some embodiments, the cushion ring has a contour substantially following the contours of the sprocket teeth geometry. In some embodiments, the cushion ring has a randomized contour to provide predetermined cushioning that varies from tooth to tooth around the sprocket.

Abstract: A bicycle hub assembly comprises a shaft, a first load bearing adjacent said shaft, a hub main body surrounding said shaft, and a cogset. The cogset can define an inner surface, and the inner surface can define a seat configured to receive the first load bearing. Further, the inner surface can define an opening of variable size. The cogset can also define an inner end and an outer end, and the opening can generally increase in size from the outer end to the inner end.

Abstract: A bicycle sprocket is provided with a sprocket body and a chain engagement structure. The chain engagement structure includes sprocket teeth defining chain rollers receiving troughs. At least two consecutive ones of the troughs include a driven-side surface and a non-driven-side surface. The driven-side surfaces each have a first chain roller contact points corresponding to a first radius of a first minimum contact circle when one of the chain rollers is positioned to fittingly contact the driven-side surface. The non-driven-side surfaces each have a second chain roller contact points disposed at a second position corresponding to a second radius of a second minimum contact circle when one of the chain rollers is positioned to fittingly contact the non-driven-side surface. The first radius is larger than the second radius. The driven-side surfaces have effective concavities that are equal to or less than the curvatures of the chain rollers.

Abstract: The invention concerns a chain for a chain transmission with chain links coupled by a parallel chain pins, each chain link having at least one link plate, the chain pins forming pivot axes for the link plates at a pitch distance whereby a chain link axis perpendicularly intersects the two pivot axes, said link plates having towards at least one end side of the link plate a cam surface for supporting the link plate on a cylindrical support surfaces of a sprocket wheel with a pitch angle. In accordance with the invention the cam surface ends in a convex curved plane with near the end side an increasing slope angle with the link axis whereby the slope angle increases to at least half of the pitch angle or to at least seven degrees.

Abstract: When disposing pins of different shapes at random, pins of small involute base circle radius are made not to be arranged contiguously, pins of relatively small length are made not to be arranged contiguously, and pins of relatively outward offset are made not to be arranged contiguously.

Abstract: A cushion ring sprocket assembly and chain drive system are designed to prevent roller-to-root radial contact. Hard contact between the chain link plates and the cushion rings, and corresponding hard contact between the cushion rings and the sprocket hubs limit radial inward movement of the chain rollers/bushings, while the root surfaces of the tooth spaces are undercut so that the rollers cannot contact the root surfaces.

Abstract: A sprocket is provided having a plurality of teeth around its circumference. Adjacent teeth are separated by roots each having a root radius defined as the distance between the center of the sprocket and a point along the root closest to the sprocket center in a radial direction. In one aspect of the invention, the sprocket comprises at least two different root radii arranged in a pattern effective to redistribute tensions imparted to a chain by the sprocket at one or more predetermined sprocket orders.

Abstract: A sprocket includes teeth defined relative to respective tooth centers spaced evenly about an axis of rotation. An inverted tooth chain includes rows of links each structured for inside flank engagement with the sprocket, with leading inside flanks of each row projecting outwardly relative to the trailing outside flanks of a preceding row. The leading inside flanks of each row are positioned to make initial meshing contact with an engaging flank of one of the sprocket teeth. At least some of the teeth are standard teeth and other ones of the teeth are flank-relieved teeth. The engaging flanks of the flank-relieved teeth are negatively offset as compared to the engaging flanks of the standard teeth measured relative to their respective tooth centers. The root surfaces leading the flank-relieved teeth are raised relative to the root surfaces leading the standard teeth.

Abstract: A bicycle multi-gear cassette mountable to a wheel hub that generally includes a truncated conical shell and a plurality of toothed sprockets having different numbers of teeth. The shell includes a plurality of coaxial annular cylinders of variable diameter extending along an axis of the shell and a plurality of coaxial annular discs of variable diameter extending radially of the axis. The cylinders and discs are alternatingly arranged in a stepped sequence. The toothed sprockets are disposed on the shell and extend radially of the shell axis. At least one of the toothed sprockets includes a recess on a side facing an adjacent toothed sprocket having a smaller number of teeth. The recess includes a first region having a first depth and a second region having a second depth. The first depth is greater than the second depth. The shell and the plurality of toothed sprockets embody a single piece.

Abstract: A cushion ring sprocket assembly includes a sprocket body with a plurality of teeth arranged in a row. The sprocket body includes first and second opposite axial tooth faces and first and second hubs that extend axially outward relative to the first and second tooth faces. First and second sets of cushion rings are captured on said first and second hubs, respectively. The first set of cushion rings includes at least a first inner cushion ring eccentrically located on the first hub and a first outer cushion ring eccentrically located on the first inner cushion ring. The second set of cushion rings includes at least a second inner cushion ring eccentrically located on the second hub and a second outer cushion ring eccentrically located on the second inner cushion ring. The first and second outer cushion rings are adapted to be contacted and deflected by link plates of an associated chain, so that the first and second outer cushion rings contact and deflect the respective first and second inner cushion rings.

Abstract: A randomized chain sprocket has a set of four tooth gaps having three different tooth gap radial locations, two different link angles, and a chain with constant link pitch.

Abstract: In a chain and sprocket assembly, the order of the sprocket and the wrap angle of the chain are selected such that the resonance tension of the chain and sprocket assembly is minimized.

Abstract: An improved sprocket profile for engaging a roller or bush chain smoothly and preventing radial impact with the root of the tooth during engagement. Contact between the sprocket teeth and the roller chain is altered by providing teeth with a root radius equivalent to that of the chain engaging component, with the center point of the root radius located one chordal distance inside the sprocket's pitch circle. This profile allows chain rollers or bushings to impact sprocket teeth tangentially on their flanks rather than radially on their tooth root.

Abstract: In a chain transmission having a sprocket with an elastic ring sandwiched between a central hub and an annular toothed outer member, the tooth form is such that the root diameter, that is, the diameter of the tooth gap bottom circle, is greater than the root diameter in a sprocket having a standard ISO tooth form.

Abstract: In a chain transmission, vibration reduction is improved by an elastic member, sandwiched between an inner hub of a sprocket and a toothed outer circumferential member, in combination with a sprocket tooth configuration in which two or three different tooth form pitch angles are arranged irregularly along the sprocket's pitch circle.

Abstract: In a roller or bushing chain transmission a standard roller or bushing chain having a uniform chain pitch meshes with a sprocket having at least two different tooth form pitches.

Abstract: A sprocket is provided having a plurality of teeth around its circumference. Adjacent teeth are separated by roots each having a root radius defined as the distance between the center of the sprocket and a point along the root closest to the sprocket center in a radial direction. In one aspect of the invention, the sprocket comprises at least two different root radii arranged in a pattern effective to redistribute tensions imparted to a chain by the sprocket at one or more predetermined sprocket orders.

Abstract: There is provided a double-face driving silent chain wherein the size of each inner link plate of an exterior driving link train to a back face thereof is set to be equal to or greater than the size of each link plate of an interior driving link train. Thereby, inner side planes of the back face of the inner link plate abut against the both side planes of an interior driving sprocket and guide and prevent the silent chain from engaging with the sprocket in twist. All the link plates, other than the inner link plates of the exterior driving link train, have the same shape when seen from the side and the outermost link plate of the interior driving link train is thin as compared to the other link plates.

Abstract: In a chain transmission in which a roller chain transmits power from a driving sprocket to one or more driven sprockets, the sprocket teeth are shaped so that at a location radially outward from the sprocket pitch circle, the distance between the front surface of each sprocket tooth to a radial reference line from the sprocket center through the center of the tooth root, is at least as great as the distance from the centerline to the front tooth surface at the pitch circle. The tooth faces merge smoothly with the tooth gap bottom, the sprocket root diameter is smaller than the root diameter according to ISO standards, and the radius of the arcuate tooth gap bottom is greater than the radius of the chain roller.

Abstract: In a chain transmission using a hybrid chain having inner and outer links with bushings, or with bushings and rollers, the rollers mesh with a central sprocket, and the link plates have teeth that function as a silent chain, meshing with side sprockets fixed to the central sprocket. The teeth of the link plates of the inner links have a shape different from that of the teeth of the link plates of the outer links. The outer flanks of the teeth can all have the same shape, and the shape difference can be in the shapes of the inner flanks.

Abstract: A transmission chain for a transmission having a drive sprocket and a driven sprocket with chain guides between the sprockets, at least one of the guides having a curved surface on which one of the runs of the chain slides in its travel between the sprockets. The chain has inner and outer link plates which respectively mount bushings and connecting pins which pass through the bushings with a clearance. The link plates have sliding surfaces which slide on the guide. The transmission chain has a chain pitch defined as P1, and the maximum clearance formed between the connecting pins and the bushings is defined as C. The sliding surfaces are curved like the guide and the curved surfaces of one of the outer and inner link plates, has a curve width X, and the curved surface of the other of the inner and outer link plates, has a curve width Y.

Abstract: A sprocket for a chain drive using a roller or bushing chain has a plurality of different pitch angles, including both pitch angles larger than the standard pitch angle, and pitch angles smaller than the standard pitch angle. The number of pitch angles in the sprocket larger than the standard pitch angle is greater than the number of pitch angles in the sprocket smaller than the standard pitch angle.

Abstract: A chain drive, especially to a camshaft/camshaft drive for a motor vehicle engine, comprising at least two chain wheels and one drive chain. The gear rims of the at least two chain wheels are arranged to be laterally offset to each other in the axial direction. The chain drive is performed as a multiple chain, wherein each of the offset gear rims of the chain wheels have their own track of the multiple chain due to the lateral displacement of the gear rims. The tip diameters of the offset gear rims and the chain wheels are overlapping. At least one support wheel is provided laterally next to a gear rim of an associated chain wheel, which engages into the empty track of the multiple chain not engaged with the gear rim of the associated chain wheel and is driven together with the associated chain wheel.

Abstract: In a sprocket for a chain transmission, teeth are disposed around the circumference of the sprocket at intervals. Arc-shaped tooth gap bottoms are formed between adjacent teeth, and each tooth gap bottom is continuous with the facing tooth surfaces of its adjacent teeth. Each tooth is formed so that its thickness is greater than the thickness of an ISO tooth form and gradually becomes thinner from the pitch line toward the tooth head. At engagement of the chain with the sprocket, a roller first comes into contact with a back tooth surface so that polygonal movement is suppressed.

Abstract: A hybrid chain comprises outer links composed of link plates connected in side-by-side relationship by two connecting pins fitted to holes in the outer plates, and inner links composed of link plates in spaced, side-by-side relationship and connected by two bushings on which rollers are mounted, the bushings being fitted to holes in the inner plates. The inner and outer links are connected in alternating, overlapping, relationship, with each pin of an outer link extending through a bushing of an adjacent overlapping inner link. The chain meshes with a sprocket composed of a central sprocket engaged by the rollers, and two side sprockets. The inner link plates, the outer link plates, or both, have two teeth, with outer flanks in the form of arcs each centered on the more remote pin or bushing hole. The inner link plates, outer link plates, or both, can be double-sided link plates.

Abstract: When disposing pins of different shapes at random, pins of small involute base circle radius are made not to be arranged contiguously, pins of relatively small length are made not to be arranged contiguously, and pins of relatively outward offset are made not to be arranged contiguously.

Abstract: The present invention refers to a mechanism for mechanical speed reducer or in some cases for speed increase, in which for each reducing stage there are two sprockets disposed laterally and in parallel position between themselves, moreover one of them in orbital motion provided by a eccentric cam reciprocal to the reducer input element and the other sprocket disposed concentric with the input element and the torque transmission between the sprockets is done through a chain.

Abstract: In a slat conveyor, slats for supporting conveyed articles and personnel extend between two side-by-side, spaced, endless roller chains engaged with driving sprockets at one end of the conveying path and driven sprockets at the other end. At a location radially outward from the pitch circle, the distance between the front surface of the sprocket teeth to the tooth center line is at least as great as the distance from the centerline to the front surface at the pitch circle. The tooth faces merge smoothly with the tooth gap bottom, and the root diameter is smaller than the root diameter according to ISO standards.

Abstract: In a chain transmission, vibration reduction is improved by an elastic member, sandwiched between an inner hub of a sprocket and a toothed outer circumferential member, in combination with a sprocket tooth configuration in which two or three different tooth form pitch angles are arranged irregularly along the sprocket's pitch circle.

Abstract: A method is described for the operation of a transmission device (3) with several shift elements (5, 6) actuated hydraulically by a pressure source (4) for engaging and disengaging various transmission ratios and with several electric actors (7, 8) of a hydraulic system of the transmission device (3) for the adjustment of actuating pressures for the shift elements (5, 6). When an engine start-stop function calls for a combustion engine (2) of a drivetrain comprising the transmission device (3) to be switched off, the energizing current of the actors (7, 8) is adjusted from an operating level (I_B) in which the respective actors (7, 8) are energized with a current appropriate for producing an operating-situation-dependent actuation pressure in the shift elements (5, 6), to a standby level (I_S). When the engine start-stop function calls for the combustion engine (3) to be switched on, the energizing current of the actors (7, 8) is adjusted from the standby level (I_S) to the operating level (I_B).

Abstract: In a roller chain transmission, the chain has rollers which are tapered from a central region toward their ends, and the teeth of the sprockets in driving and driven relationship with the chain have concave surfaces that contact the tapered parts of the rollers on both sides of a central region. However, there is no contact between the rollers and the sprockets in the central region. The central regions of the rollers can be provided with compressible external resin rings that cushion the impact on engagement of a roller with a sprocket tooth.

Abstract: An over-molded beaded driving cable which has an inner core, a plurality of inner core structures. An outer jacket may encompass the inner core and inner core structures. Each of a plurality of outer beads concentrically surrounds an inner core structure. The outer beads are over-molded in this position, forming an interlocking inner core structure and outer bead configuration capable of high load and high flexible performance. An end fitting placed at each end portion of the inner core provides for a driving cable assembly with a variety of end fitting configurations, including a closed loop connection, for automotive and non-automotive applications. Alternatively, the over-molded beaded driving cable has a plurality of clamps and/or pins surrounded by the outer beads respectively. The cables may also be provided with seamless connection structure for forming closed loops.

Abstract: A method for installing a cushion ring on a sprocket body to construct a sprocket assembly includes applying a deforming force to a cushion ring so that an opening therein is deformed to a shape that accommodate passage of a non-circular flange of a sprocket body therethrough. When the cushion ring is deformed, the non-circular flange of the sprocket body is inserted through the opening of the cushion ring. The deforming force is then released from the cushion ring so that the cushion ring is trapped between the flange and another portion of the sprocket body. The sprocket assembly includes at least one and typically two cushion rings trapped by respective non-circular flanges.

Abstract: A sprocket is provided having a plurality of teeth around its circumference. Adjacent teeth are separated by roots each having a root radius defined as the distance between the center of the sprocket and a point along the root closest to the sprocket center in a radial direction. In one aspect of the invention, the sprocket comprises at least two different root radii arranged in a pattern effective to redistribute tensions imparted to a chain by the sprocket at one or more predetermined sprocket orders.