Abstract: A high-strength chain plate structure comprises an inner plate body and an outer plate body. The inner plate body has a first waist portion provided with a first receiving portion and a first outer side portion. The first outer side portion has a first slope. The first slope and the first waist portion form a continuous two-step structure. The outer plate body has a second waist portion provided with a second receiving portion and a second outer side portion. The second outer side portion has a second slope. The second slope and the second waist portion form a continuous two-step structure. The tensile strength, impact resistance and torsion resistance of the chain can be improved.

Abstract: A roller chain having at least one pair of offset links wherein the offset link plates are made with a steel having a high chromium content and are through-hardened using an austempering heat treatment (such as a salt bath quench). The resulting offset link plates may have a hardness in range of 44-50 HRC on the Rockwell hardness scale and a bainite metallurgical microstructure. The offset link plates may also have a greater fatigue strength than at least one of the inner link plates and the outer link plates. The inner and outer link plates may be formed out of a plain carbon steel which is heated, quenched and tempered to produce a martensite microstructure.

Abstract: A link connecting structure includes two outer link plates and two inner link plates. An inner side of each outer link plate is formed with a concave portion between two first coupling portions at two ends thereof. A connecting surface is connected between each first coupling portion and the concave portion. The connecting surface is gradually tapered inward from each first coupling portion toward the concave portion. An outer side of each inner link plate is provided with a pair of bent portions each extending from an outermost edge of each second coupling portion toward the connecting surface. A gap is defined between each bent portion and the connecting surface. The gap is less than the minimum thickness of a narrow tooth of a chainring, thereby preventing the tooth from being jammed in the gap.

Abstract: The present invention is a chain structure of bicycles, which comprises a plurality of rollers, a plurality of chain sheets and a plurality of chain rollers. Wherein the rollers define a mounting space. Each chain sheet comprises a chain body, a first pivot joint part extending from one end of chain body and to be arranged in the mounting space, a second pivot joint part horizontally extending from the other end of chain body, the second pivot joint part is installed on the roller with the first pivot joint part, wherein the first pivot joint part is in a horizontal position different from chain body, the first pivot joint part defines a rotation space for placing the second pivot joint part of another chain sheet, so that the first pivot joint part and second pivot joint part can rotate a preset angle in the rotation space.

Abstract: A bicycle chain comprises a first outer link plate. The first outer link plate comprises a first outer-link end portion, a second outer-link end portion, a first outer-link intermediate portion, and a first outer-link longitudinal centerline. The first outer-link end portion, the second outer-link end portion and the first outer-link intermediate portion define a first outer-link outer peripheral edge. The first outer-link outer peripheral edge comprises a first outer-link end edge, a second outer-link end edge, and a pair of first outer-link intermediate edges. A first radial distance is defined from a first outer-link center axis to the first outer-link end edge in a perpendicular direction. A minimum distance is defined between the pair of first outer-link intermediate edges in the perpendicular direction. The minimum distance is smaller than 200% of the first radial distance and is equal to or larger than 5 mm.

Abstract: A roller chain includes pins, bushings, rollers, inner plates and outer plates. Two bushings are connected to one another in each case by way of at least two inner plates to form a chain link. Two consecutive chain links are articulately connected to one another in each case by way of each bushing being seated on a pin projecting beyond both ends of the bushing. At least one combination, which consist of two mutually frictionally engaged components—the pin and bushing on the one hand, the bushing and roller on the other hand,—include one component consisting of austenitic stainless steel with an S-phase formed at least on the surface by way of nitriding at a temperature between about 400° C. and 500° C., and another component consisting of a stainless ferritic steel, which at least on the surface, is nitrided at a temperature between about 1000° C. and 1200° C.

Abstract: An overhead conveyor, components therefor and method for making same, in which the conveyor chain has a nominal pitch “X,” bit a maximum allowable chain pull value which is equal to or greater than the maximum allowable chain pull value for a chain having a nominal pitch of X+1. Trolleys can be attached to the chain at intervals which differ from the intervals of a chain with pitch of X+1. Fewer synchronized drives are required for driving longer chains. A lower pitch chain can be used to drive larger trolleys, without sacrificing the maximum allowable chain pull value always used in conjunction with the larger trolley.

Abstract: Provided are a chain and a connecting pin that enable reduction in the number of components and the workload involved in chain assembly, and that enhances the strength of a connecting pin. A chain 100 has inner plates 110, outer plates 120 and connecting pins 130. Each connecting pin 130 has a pair of outer shaft sections 131 formed on both end sides of the pin and fixed into pin holes 121 of the outer plates 120; a pair of inner shaft sections 132 formed inward of the pair of outer shaft sections 131 in the pin longitudinal direction and freely fitted into pin holes 111 of the inner plates 110; and a movement restricting section 133 formed inward of the left-right pair of inner shaft sections 132 in the pin longitudinal direction and restricting the movement of the inner plates 110 in the chain width inward direction.

Abstract: In a roller or bushing chain, inner link plats have an oval shape, with a guide-contacting surface continuous with arc-shaped ends, and in the form of an arc having end points that are spaced from each other by a distance greater than the chain pitch but less than the greatest distance between parts of bushing holes in the inner link plates. The outer link plates have straight parallel edges parallel to the direction of chain elongation and semicircular ends continuous with the straight edges. The configuration of the inner link plates prevents the outer link plates from coming into contact with a chain guide.

Abstract: An inner link plate is provided for a chain. The inner link plate has a longitudinal centerline, an inside surface arranged to face another inner link plate when the chain is assembled, an outside surface opposite to the inside surface, and an outer peripheral edge disposed between the inside and outside surfaces. The bicycle inner link plate basically has a first end portion, a second end portion and a connecting portion. The first and second end portions are each provided with a connecting opening. The connecting portion includes a recess disposed on the inside surface of the connecting portion. The recess has a maximum longitudinal width on the outer peripheral edge, and a minimum longitudinal width in a region adjacent the longitudinal centerline. The recess at least extends from the outer peripheral edge to the longitudinal centerline.

Abstract: A leaf chain comprises a plurality of links connected together, each of which includes two aligned rollers, at least one first inner plate provided with apertures to pivotally receive the rollers, and two outer plates fixed to the respective rollers and respectively positioned at external sides of the first inner plate. Wherein, two spacers are respectively disposed at both peripheries of the aperture on the first inner plate and annularly disposed on the rollers so as to block a leakage of a lubricant distributed over an interstice formed between each roller and each aperture.

Abstract: The invention refers to a toothless link chain with alternating chain links, wherein inner and outer link plates of the chain links have a substantially identical height profile. The link plate backs of the inner or outer link plates, which are brought into contact with a guide rail, have an at least partial height offset to the link plate backs of the other link plates. A connecting line through the center points of the joint openings of each link plate divides the corresponding link plate into a first link plate section located above and a second link plate section located below the connecting line, where said second link plate section is asymmetric to the first link plate section, at least with respect to the height profile, and wherein the inner link plates are assembled at a 180° rotation.

Abstract: The invention relates to an engagement chain type driving device including a pair of driving sprockets, which rotate positively and reversely in opposite directions about a pair of rotating shafts, a pair of engagement chains, which engage with each other by the pair of driving sprockets so to be integrated together, and a driving source, which drives the pair of driving sprockets, wherein the engagement chain includes inner tooth plates and outer tooth plates, which each include buckling limiting flat surfaces, the inner tooth plates and outer tooth plates being brought opposite to each other and into contact with each other when the engagement chains are integrated by the pair of driving sprockets, such that the flat surfaces hold the chain engagement position.

Abstract: An inner link plate is provided for a chain. The inner link plate has a longitudinal centerline, an inside surface arranged to face another inner link plate when the chain is assembled, an outside surface opposite to the inside surface, and an outer peripheral edge disposed between the inside and outside surfaces. The bicycle inner link plate basically has a first end portion, a second end portion and a connecting portion. The first and second end portions are each provided with a connecting opening. The connecting portion includes a recess disposed on the inside surface of the connecting portion. The recess has a maximum longitudinal width on the outer peripheral edge, and a minimum longitudinal width in a region adjacent the longitudinal centerline. The recess at least extends from the outer peripheral edge to the longitudinal centerline.

Abstract: In a roller or bushing chain, inner link plats have an oval shape, with a guide-contacting surface continuous with arc-shaped ends, and in the form of an arc having end points that are spaced from each other by a distance greater than the chain pitch but less than the greatest distance between parts of bushing holes in the inner link plates. The outer link plates have straight parallel edges parallel to the direction of chain elongation and semicircular ends continuous with the straight edges. The configuration of the inner link plates prevents the outer link plates from coming into contact with a chain guide.

Abstract: A bicycle chain having an alternating succession of outer links and of inner links, connected to each other at respective connection ends, each link, outer and inner. The chain has two respective plates, outer and inner, arranged parallel and spaced apart to define a space for receiving a tooth of a sprocket of a sprocket assembly of a rear wheel of a bicycle. The chain has a maximum thickness comprised between and including 4.6 mm and 5.8 mm.

Abstract: An articulated driving mechanism for a dispenser which in one embodiment is a caulking gun has a series of rigid links that are secured to one another by pins. The pins can slide in a slot which allows the links to space away from one another in a first position or be squeezed side by side which then prevents any rotation in a second position. The links all have ratchet teeth to engage two different driving wheels. The two driving wheels rotate at different speeds which allows the links to be consistently opened before reaching a circumferential wheel so that then the spaced links can rotate and safely and reliably rotate as they follow the circumference of the wheel. The articulated driving mechanism is used as a substitute for a push rod in a caulking gun in at least one embodiment.

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: The invention relates to a link chain having two or more rows of chain elements, wherein the chain elements of one row are rotatably connected to those of the adjacent row in the chain plane in such a way that each chain element has two rotational axes, of which in each case one of the two rotational axes belongs to two different chain elements in adjacent rows, and that the chain elements of one row are connected to one another by means of toothed devices at their ends in such a way that the chain is flexible in the chain plane. The chain elements at one end of the link chain are likewise provided, at their outer side, with a toothed device, which is in engagement with an actuator. The actuator is a pneumatic actuator, a hydraulic actuator, an electromotive actuator or a manual drive actuator. The actuator may have a latching fitting, wherein the latching fitting is provided with a toothed surface that is in engagement with a toothed surface of a chain element in one row.

Abstract: A power transmission chain (1) has links (11), pins (14), and interpieces (15). The links (14) each have a front and a back insertion parts (12, 13) through which the pins are inserted. The pins (14) and the interpieces (15) connect links (11) that are arranged side by side in the lateral direction of the chain such that the front insertion part (12) of one of the links (11) and the rear insertion part (13) of the other link (11) correspond to each other, and the connection is made such that that the links (11) are bendable in the longitudinal direction. The locus of a contact position of a pin (14) and an interpiece (15) is an involute of a circle. Two or more kinds of sets of a pin (14) and an interpiece (15) having different radii of base circles of involutes are formed, and these sets of a pin (14) and an interpiece (15) are randomly arranged.

Abstract: A link for a chain, which is used in a linear actuator, comprises a base member and a plate pivotably mounted on the base member. An arm extends from the plate. A first connecting means is disposed on a distal end of the arm to connect the link with a first adjacent link. The plate has a protrusion for releasably engaging a second adjacent link. A second connecting means is disposed on the base member to connect the link with the second adjacent link.

Abstract: A plate-link chain composed of a plurality of plates that form plate sets, which are connected to an adjacent plate set with a hinge joint. At least some of the plates have a stopping means that limits bending of the plate-link chain in a direction opposite to the bend direction the chain undergoes when it passes over and around a pulley or a gear with which the chain comes into contacting engagement when the pulley or gear rotates.

Abstract: A hoisting and lowering driving engagement multi-row chain is disclosed, in which bending of the connecting pins in the chain is suppressed to avoid fatigue failure. Additionally, the load carrying balance in the chain width direction is improved, and contact vibrations and contact noises generated between the chain and the hoisting and lowering sprockets are suppressed. Endurance of the bush in the chain is thereby improved. Bending of connecting pins is avoided by press-fitting bushes, through which connecting pins pass, into intermediate tooth plates. This also improves load carrying balance widthwise. Contact noises and vibrations between the bushes and sprockets are suppressed by providing bushes with a separate sprocket engagement portion having a larger diameter than the press-fitting portion of the bushes.

Abstract: An outer chain plate is configured to aid in downshifting such that a chain moves more smoothly from an outer chain ring (sprocket) to an inner chain ring (sprocket) with either no downshifting recess being provided on the outer chain ring or at least a shallower than normal downshifting recess being provided on the outer chain ring. At least a bottom part of the outer chain plate that faces a center axis of a sprocket when in use has a portion removed to minimize contact with outer chain ring when downshifting. Preferably, the bottom part of the outer chain plate has a chamfered outer edge portion along a cutout portion that defines a reduced area portion.

Abstract: A leaf chain comprises a plurality of links connected together, each of which includes two aligned rollers, at least one first inner plate provided with apertures to pivotally receive the rollers, and two outer plates fixed to the respective rollers and respectively positioned at external sides of the first inner plate. Wherein, two spacers are respectively disposed at both peripheries of the aperture on the first inner plate and annularly disposed on the rollers so as to block a leakage of a lubricant distributed over an interstice formed between each roller and each aperture.

Abstract: A limited slip differential transmission of the closed type in which a pressurized lubricant is fed to the rotating gears and a series of limited slip clutch plates. The clutch plates are engaged by pressurized control fluid. A valve assembly having a spool valve is responsive to engagement pressure to permit discharge of a portion of pressurized fluid from the clutch plates to a sump chamber and the transmission to purge debris that may have accumulated in the clutch plates. The spool valve is arranged so that fluid is passed only during an intermediate movement of the valve to minimize any pressure loss from the lubricating fluid for the transmission and limited slip clutches.

Abstract: A bicycle chain connecting link basically has a first link plate, a second link plate, a first link pin and a second link pin. The first link plate has a longitudinal slot. The second link plate has a pair of pin attachment openings. The first and second link pins each have a first pin end retained to the first link plate and a second pin end releasably coupled in the pin attachment openings of the second link plate to be separated from the second link plate and reattached to the second link plate. At least one of the first pin ends of the first and second link pins is slidable within the longitudinal slot of the first link plate in a longitudinal direction of the longitudinal slot of the first link plate.

Abstract: A power transmission chain includes a plurality of links aligned in a chain travel direction and a coupling member that includes a first power transmission member and a second power transmission member. The first power transmission member includes an opposing portion that opposes the corresponding second power transmission member and contacts the corresponding second power transmission member on a contact portion that undergoes displacement in association with a change of a bending angle between corresponding links in a contact state including at least one of rolling contact and sliding contact. The opposing portion includes an arc-shaped portion having a predetermined radius of curvature and a rate-of-change increasing portion. The arc-shaped portion includes a portion that forms the contact portion when the bending angle is equal to or greater than zero and equal to or smaller than a predetermined boundary angle.

Abstract: Manufacture method and manufacturing apparatus for power transmission chain according to the invention are adapted to accomplish exact positioning of pin members and link plates. This permits the pin members to be positively press-inserted into pin holes of the link plates and hence, the fabrication of the power transmission chain is facilitated.

Abstract: A device for inserting an articulation pin (28) to pivotally connect the outer plates (12) and the inner plates (14) of a chain, particularly a bicycle chain. The device comprises an articulation pin (28) and a guide element (30) which is to be separated from the pin (28) after the insertion of the pin (28) within aligned holes (16, 18) of the plates (12, 14). The pin (28) is provided at one end thereof with a snap engaging portion (38) shaped so as to expand the holes (16) of the outer plates (12) in a radial direction during the insertion of the pin.

Abstract: A silent chain with bushings comprises outer and inner links interconnected in alternating relationship. Each outer link comprises outer plates and connecting pins press-fit into the pin holes in the outer plates. Each inner link comprises a center guide plate disposed at a location midway between the sides of the chain, and toothed inner link plates on both sides of the center guide plate. Bushings are press-fit into bushing holes in the guide plate and the toothed inner link plates. The connecting pins of the outer links extend through bushings of the adjacent inner links, thereby connecting the outer and inner links of the chain are in alternating relationship.

Abstract: A method of manufacturing a link plate for a roller chain, and the resulting link plate in which (1) the link plate has a shape comprising a pair of right and left pin holes, a pair of right and left half arcs, which are spaced outwardly from the pin holes respectively, and a pair of upper and lower straight line portions connecting both ends of the pair of right and left half arcs. There are shaved lengths along the pair of upper and lower straight line portions extending into the half arcs, the shaved length extending between the outermost positions of both ends of said pin holes.

Abstract: Transmission chain with links coupled by rocker assemblies with each two longitudinal pins which roll over each other and of which one cooperates in a force transmitting way with the opposite pulleys of a pair of cone-shaped pulley sheaves, and these pins have a first dimension (b) in the longitudinal direction, a second dimension (h) perpendicular to the longitudinal direction and to the running direction of the chain and a third dimension (d) cross-wise to the longitudinal direction and in the running direction, in which for each value of the first dimension (b) both other dimensions (h) and (d), respectively, are such that the ratio between this dimension (b) and each of the other dimensions, is, taking into account the expected loading of the chain, as small as possible.

Abstract: A chain and a chain and sprocket assembly for a roller, bush, or inverted tooth chain is disclosed. The chain has at least two types of link plates having different profiles, with at least one type of link plate having a leading corner for interaction with a contact ring on the sprocket, thereby reducing noise by reducing chordal action and by breaking up the regular timing of roller-sprocket (or bushing-sprocket) and link plate-sprocket impact. A method of reducing noise in a chain and sprocket assembly is also disclosed.

Abstract: A bicycle chain connecting pin comprises a pin body dimensioned to fit within an opening in a link plate of a bicycle chain, wherein the pin body has an intermediate part and first and second ends. At least one of the first and second ends has a corresponding first or second recess defining a floor that faces in a longitudinal direction of the pin away from the pin. The floor has a floor diameter of from approximately 60% to approximately 90% of an outer diameter of the intermediate part.

Abstract: A transmitting multi-row chain having easy disassembling or assembling such as dismounting or mounting a chain on its sprockets and, when even high load chain tension is applied, the high load is dispersed to each inner plate so that the load balance in the chain width direction is improved. A transmitting multi-row chain in which inner link units each comprising inner plates into which bushes are press-fitted are coupled in parallel with each other through intermediate plates in a width direction of the chain. The coupled inner link units are connected to each other in a large number by connecting pins having a diameter smaller than the diameters of the pin holes of the intermediate plate. The connecting pin is inserted into the pin hole 121 of the intermediate plate whose pitch between pin holes is narrower than the pitch between pin holes of the outer plate, the pin having a medial bend directed toward the pitch zone of the outer link in a state where chain tension is not generated.

Abstract: In a silent chain comprising interleaved and relatively pivotable rows of link plates, protrusions formed in the link plates contact relatively pivotable link plates in adjacent rows so that the area of contact is reduced. The protrusions can be annular, or they can be in the form of arcs that are of a size and position such that the arcuate protrusions of each plate do not interfere with the arcuate protrusions of an adjacent plate as the chain bends during use. The plates can have rectangular protrusions, or arcuate protrusions each consisting of an arc-shaped collection of dot-shaped protrusions.

Abstract: A linear actuator comprises a pair of chains. Each chain has a first link and a second link. The second link of each chain is adjacent to the first link of the chain. A pivotal connection pivotally connects the first and second links. The first link is pivotable about a pivot axis which is non-perpendicular to a longitudinal axis of the first link. A chain connecting member connects the chains at distal ends thereof. A drive mechanism moves the chains between an extended position and a retracted position. At least a portion of each chain is helically wound when the chains are in the retracted position.

Abstract: A hybrid roller/silent chain of the present invention has the wear resistance of a roller chain combined with the noise performance of a silent chain. This is accomplished with the use of transverse load-bearing elements that allow increased bearing area for the articulating members of the chain by allowing load to be transmitted through both the inside and outside diameter of the element in the same plane. In some embodiments, the transverse load-bearing elements are bushings. In other embodiments, the elements are projections extending from non-guide row inside links.

Abstract: A bicycle chain has an outer link with two outer link plates, an inner link formed with two inner link plates and a link pin connecting adjacent ones of the together. The link plates are configured to aid in smoothly shifting a chain moves between sprockets. The outer link plates have the outer link peripheral edges that are shaped differently. One of the outer link plates has an exteriorly facing surface with a first chamfered outer edge portion extending along a section of its outer link peripheral edge at a first end portion and a first reduced area part having a reduced radial dimension with respect to a radial dimension of the first end portion lying along a longitudinal axis. The inner link plates have center connecting portions with different minimum widths.

Abstract: A transmitting multi-row chain in which the chain strength is high, the chain is lightweight, and the disassembly and assembly operation of the chain such as disconnecting and connecting of the chain and the like is simple. A transmitting multi-row chain has inner link units, each comprising a pair of right and left inner plates into which a pair of front and rear bushes is press-fitted. The inner link units are connected in rows to each other in large numbers in the longitudinal direction of the chain by connecting pins and the rows are disposed in parallel with each other through intermediate plates in a width direction of the chain. The connecting pins are press-fitted into outer plates disposed on the outermost sides in the width direction of the chain and are loosely fitted into pin holes of the intermediate plates. The intermediate plates are each formed in a plate height dimension smaller than the plate height dimension of each of the inner plate and the outer plate.

Abstract: A bicycle chain includes a plurality pairs of outer plates and inner plates. Each pair of the outer plates is connected at two opposite ends to two pairs of the inner plates by connectors connected to the inner plates. Each connector has a rivet extending therethrough and two ends of the rivet are respectively connected to the two opposite ends of the outer plates. Each rivet has a protrusion extending radially outward from the outer periphery thereof and the protrusion is in contact with an inner periphery of a central passage of the connector corresponding thereto. There is a gap defined between the rivet and the inner periphery of the central passage so that the chain has more flexibility.

Abstract: In a roller chain, the outside diameters D of the rollers and the outside diameters d of the pins extending through bushings on which the rollers are disposed satisfy the relationships 0.72P?D?0.79P and 0.40P?d?0.44P where P is the pitch of the roller chain. The height H of the inner plates of the chain satisfies the relationship 0.96P?H. The elongation ratio of the chain is significantly reduced, and improvements in breaking strength of the pin and in the rotational fatigue of the chain are realized. Consequently wear resistance, strength, and endurance of the chain are significantly improved, making the chain suitable for use as a timing chain in an engine that rotates at high speed.

Abstract: A Hybrid Roller/Silent chain that has the wear resistance of a roller chain combined with the noise performance of a silent chain. This is accomplished with the use of bushings that allow increased bearing area for the articulating members of the chain, specifically by allowing load to be transmitted through both the inside and outside diameter of the bushing in the same plane.

Abstract: In a roller chain transmission, the diameter D of the rollers, the outer diameter d of the pins, and the height H of the inner plates satisfy the relationships 0.72P≦D≦0.79P, 0.40P≦d ≦0.44P, and 0.96P≦H , with respect to the chain pitch P. The radius r of the arc of the tooth gap bottom of the sprocket teeth satisfies the relationship 0.505D≦r≦0.505D+0.069{cube root}{square root over ( )}D. The transmission chain exhibits high durability due to improved strength and wear resistance under high loads.

Abstract: In a roller chain transmission, the diameter D of the rollers, the outer diameter d of the pins and height H of the inner plates satisfy the relationships 0.72P≦D≦0.79P, 0.40P≦d≦0.44P, and 0.96P≦H, with respect to the chain pitch P. The sprocket teeth are asymmetric in that the chain entering side and the chain leaving side differ, and the radius R1 of an arc of the tooth gap bottom, the radius R2 of the chain entering side tooth flank and the radius R3 of the chain entering side tooth head portion satisfy the relationships 0.505D≦R1≦0.505D+0.069{cube root}D, P−(0.505D+0.069{cube root}D)≦R2≦P−0.505{cube root}D, and 0.08≦R3≦0.13P. The transmission chain exhibits improved endurance and quietness, smooth operation, and resistance to elongation due to wear.

Abstract: A chain link assembly including a first link pivotally joined to a second link by a pin. The first link has a pair of first sidebars joined by a first barrel. Each first sidebar includes first and second ends joined by an inner surface and an outer surface. The first ends of each sidebar define coaxial first apertures coaxial with the first barrel, and the second ends define coaxial second apertures. A second link has a pair of second sidebars joined by a second barrel. Each second sidebar includes first and second ends joined by an inner surface and an outer surface. The second sidebar first ends define coaxial first apertures coaxial with the second barrel and the second apertures of the first link, and the second ends of the second sidebars define coaxial second apertures. A pin extends through the first apertures and first barrel of the second link and the second apertures of the first link to pivotally join the first link to the second link.

Abstract: A substantially cylindrical bushing for a roller chain formed from a substantially parallelogram blank wherein the lateral sides of the blank are obliquely related to the ends of the blank such that rolling of the blank to form the cylindrical bushing results in a helical bushing seam line. The helical bushing seam line provides improved joint wear and bushing endurance, reduced socket wear, smoother chain and socket engagement, reduced vibration and noise levels, and a reduced need for seam orientation during assembly.

Abstract: The present invention relates to an articulated chain comprising chain links interconnected at chain hinges, wherein each chain hinge comprises a hinge pin and a hinge bearing surrounding said hinge pin, and wherein the hinge pins are provided with a borided layer on the outer circumferential surface thereof and the hinge bearings are produced from a sintered material, the layer bottom of the borided layer, which faces the base material, being provided with teeth.

Abstract: A device for inserting an articulation pin (28) to pivotally connect the outer plates (12) and the inner plates (14) of a chain, particularly a bicycle chain. The device comprises an articulation pin (28) and a guide element (30) which is to be separated from the pin (28) after the insertion of the pin (28) within aligned holes (16, 18) of said plates (12, 14). The pin (28) is provided at one end thereof with a snap engaging portion (38) shaped so as to expand the holes (16) of the outer plates (12) in a radial direction during the insertion of the pin.