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 roller chain transmission comprises a sprocket having at least first teeth and second teeth having different tooth forms, the first teeth and second teeth being randomly arranged, and the number of the second teeth not exceeding four times of the number of the first teeth. The roller chain may also have pins of slightly differing diameters, randomly arranged along the length of the chain.

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{square root over (D)}. The transmission chain exhibits high durability due to improved strength and wear resistance under high loads.

Abstract: A chain having a plurality of inside links and guide links. The plurality of inside links each have a pair of apertures and are interleaved and connected to form rows. The plurality of guide links each have a pair of apertures and are placed outside of alternate rows of interleaved inside links to form guide rows. Connecting pins are received in the apertures and extend across the rows of the chain securing the links together. Spacing elements are found on opposite side of the chain, specifically between the guide links and the adjacent outermost inside links. The spacing elements act to maintain a spaced relationship between each of the guide link sand adjacent outermost inside links. At least one of the spacing elements on one side of the chain is a spring link holding the inside links in compressive frictional contact therebetween.

Abstract: The present invention relates to a toothed chain comprising plates interconnected on chain joints, in particular tooth plates, each of the chain joints comprising a pin bolt and at least two substantially directly adjacently arranged tooth plates whose aligned joint openings surround a respective pin bolt. The wear characteristics of such a toothed chain shall be improved. To this end, the edge portions of the joint openings are rounded at the opposite sides of at least the outer ones of the adjacently arranged tooth plates for a wear-reducing nestling of the pin bolt in case of load. Furthermore, the invention relates to a method of producing a toothed chain.

Abstract: A chain with links made of plates connected with hollow pins containing a reserve of lubricant connected with the chain parts to be lubricated. The lubricant reserve is contained in replaceable cartridges inserted removably in the pins through an appropriate end passage. The cartridge can be made with an enlarged section to constitute a plug of the pin in which it is received.

Abstract: A roller chain incorporates a plurality of rolling members between a roller and a bushing. A thrust bearing plate is provided between the end surfaces of the roller and inside surfaces of inner link plates. The outer diameter of the roller is smaller than the widths of the inner link plates and the outer link plates and the roller is accomodated in a projected area of the widths of the inner link plates and the outer link plates.

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

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: 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, 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 roller chain for moving a web of textile material in a tenter frame. The roller chain has inner members flexibly joined to outer members in an alternating manner with a sleeve and a bolt. A running roller having an inner ring; an outer ring and sealing rings forming a ball bearing assembly is mounted on the sleeve. The sealing rings substantially seal ball bearings enclosed in the running roller. The sealing ring has a spacing element consisting of individual metallic inserts distributed approximately equally around a circumference of the sealing ring. The spacing element transmits axial force applied to an inner tab of an inner member to an inner ring of the running roller. The sealing ring has a lubrication groove formed thereon in fluid communication with a lubrication hole on a sleeve and a lubrication channel in an interior of the bolt for lubricating the ball bearing.

Abstract: A plurality of chain components of a drive chain include a plurality of pairs of outer chain plates, a plurality of pairs of inner chain plates, a plurality of tubular rollers, and a plurality of pins. At least one of the outer chain plates, the inner chain plates and the tubular rollers has a hardened layer formed by infiltrating with at least one element selected from boron, chromium and aluminum.

Abstract: In a roller chain having cylindrical pins rotatably fitting into bushings on which the rollers are disposed, a vanadium carbide layer formed on the cylindrical pin surfaces avoids abnormal wear elongation of the chain, and allows smooth articulation of the chain over a long period of time, even when the lubricating oil is in an extremely deteriorated condition due to oxidation.

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: A power transmission chain having a plurality of inside links and guide links. Each inside link has at least one inverted tooth adapted to contact the teeth of an associated sprocket. Each link has a pair of apertures which are connected by connecting pins inserted through the apertures. The chain is provided with projections acting to maintain a spaced relationship between the guide links and the inside links. The spacing of the guide link away from the inside links is accomplished by spacing elements which may include projections formed on the guide link or an outer face of the outermost inside link, or by washers or spacers interposed therebetween.

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: The link plates, bushes or rollers of a transmission chain are treated so as to produce a surface layer of iron bisulphide. The surface improves the resistance of the chain to wear and also accelerates the running-in process.

Abstract: A chain (CA) comprises a plurality of link units (10), each including a pair of link plates (11) and a connection member (12) placed between the link plates (11) at one end of each link unit (10). The link plates (11) of one link unit (10) are connected end to end with the link plates (11) of another link unit (10) by a connecting pin (13) in such a way that the link units (10) are angularly displaced by 90 degrees from one link unit (10) to another as viewed along an extending direction of the chain (CA), whereby the successive link units (10) of the chain (CA) can be alternately bent in two different directions. The chain (CA) thus constructed can be bent and run in desired directions.

Abstract: A roller chain incorporates a plurality of roller members between a roller and a bushing. A thrust bearing plate is provided between the end surfaces of the roller and inside surfaces of inner link plates. The outer diameter of the roller is smaller than the widths of the inner link plates and the outer link plates and the roller is accommodated in a projected area of the widths of the inner link plates and the outer link plates.

Abstract: A roller chain for bicycles having outer and inner chain links. The outer and inner chain links have outer and inner link plates, respectively. The chain links are joined by tubular pins. The chain links have holes for receiving the tubular pins. The holes have an outward-opening conical contour for receiving a deformed head of the pin. The roller chain is assembled into a working unit by means of a closing link which joins two inner chain links. The closing link can be assembled and dismantled without plastic deformation or press-fitting forces on the closing link. The configuration of the hole contour and deformed heads allows the outer link plates to enter into a connection with the pins such that a slight movement of the pin in its seat in the hole in the outer link plate.

Abstract: A chain-belt for a CVT having a plurality of links, each link comprising a plurality of parallel tensile link plates, each link plate having connection apertures located substantially towards the ends thereof, each link being connected to an adjacent link by a pin having two ends passing through overlapping connection apertures in adjacent link plates. Wear pads are positioned on said outer link plates. A bushing, at least as long as the thickness of the tensile link plates, coaxially surrounds the chain's pins, passing through oversized holes in the link plates. Compressive force is transmitted between the wear pads by the bushing, so that the compressive force exerted by the sheaves does not deform the pin or squeeze the link plates together. The wear pads are centered on the centerline of the chain, and taper to match the taper of the pulley sheaves. The wear pads are also designed so the centerline of the wear pads intersects the center axis of the pulley when the chain is in use.

Abstract: The present invention relates to a high strength roller chain adapted for both high cyclic loads as well as intermittent high shock loads. The roller chain of the present invention includes a pin link plate having a cross sectional area through a center line of a pin receiving aperture greater than a pin link plate in a standard ANSI of an equivalent size roller chain. Further, the cross sectional area of the roller link plate through center line of one of the bushing-receiving openings is greater than that of a roller link plate in a standard ANSI roller link plate in an equivalent size roller chain. Further, the pin itself has a greater cross sectional area than the pin of a standard ANSI equivalent size roller chain.

Abstract: A transmission chain includes a plurality of unitary chain links, each of which has parallel first and second side plates, first and second connecting pins, first and second pivot pins, and first and second pivot seats. The first and second pivot pins of one of the chain links are connected pivotally, removably and respectively to the first and second pivot seats of an adjacent one of the chain links, so as to enable the transmission chain to possess the characteristics of an adjustable chain length.

Abstract: A roller chain incorporating the roller bearings wherein a plurality of rollers are disposed between a roller that functions as an outer ring and a bush that functions as an inner ring comprises a substantially ring-shaped retainer disposed on both ends of the roller respectively. The retainer includes a plurality of pockets for guiding at least a part of each of the rollers on the inner side of the retainer.

Abstract: A power transmission chain having a plurality of inside links and guide links. Each inside link has at least one inverted tooth adapted to contact the teeth of an associated sprocket. Each link has a pair of apertures which are connected by connecting pins inserted through the apertures. The chain is provided with projections acting to maintain a spaced relationship between the guide links and the inside links. The spacing of the guide link away from the inside links is accomplished by spacing elements which may include projections formed on the guide link or an outer face of the outermost inside link, or by washers or spacers interposed therebetween.

Abstract: A conveyor chain for a gripper system-bearing chain conveyor of a printing press, the conveyor chain having standard chain links and special chain links, both types of which are formed by link pins carrying chain rollers, and chain plates articulatedly connecting the link pins to one another, the special chain links serving to connect the conveyor chain to the gripper system, includes two row-wise arranged chain-roller sections rotatable independently of one another, the chain-roller sections being disposed on the link pins of at least the special chain links; and a sheet-processing printing press with a chain conveyor including the conveyor chain.

Abstract: A drive chain includes outer and inner chain plates, rollers, and pins. The outer and inner chain plates employ a closed-type pivot engagement therebetween so as to enhance protection against dust, to avoid undesired release of lubricant, and to avoid concentration of shearing forces on the pins in order to improve durability of the drive chain.

Abstract: A low noise roller chain includes a rigid roller made of metal and an elastic roller made of elastic material that are arranged end to end and fitted on a bushing between two opposed inner plates so as to jointly form a roller assembly. The width of the elastic roller is 13 to 45% of the overall width of the roller assembly, and the thickness of the elastic roller is larger than the thickness of the rigid roller by 5 to 25% of the thickness of the elastic roller. With the elastic roller thus constructed, noise generated upon abutment of the roller chain with a sprocket can be effectively suppressed without deteriorating the durability of the rigid metal roller. The elastic roller may be arranged in a zigzag pattern in the longitudinal direction of the roller chain.

Abstract: A plate chain comprising outer and inner chain links which are interconnected at joint places formed as slide bearings, with each joint place formed by a sleeve of the inner chain link and by a pin bolt of the outer chain link which rotates in the sleeve substantially about its own axis. The wear characteristics of the resulting joint places are improved. At least one portion of the lateral surface of the pin bolt and an associated portion of the inner surface of the sleeve have a different circumferential contour at the pulling side, so that the pin bolt is supported on the sleeve at least two circumferentially spaced-apart points or lines of contact at the pulling side. A method for producing chain members includes forming a sleeve with a joint trough.

Abstract: A roller-chain bushing with a stress-relief opening centrally located along the seam of a rolled or roll-formed bushing has a tapered or relief segment at each bushing end to permit compressive fitting of the bushing ends into a link-plate hole thereby minimizing deformation of the bushing end, which tapered or relief segment is locally deformed or worked at a specific location prior to forming the bushing and the tapered segment is provided in a bushing region diametrically opposite the seam to reduce barreling of the bushing at mating of the bushing with the roller link-plate, and positioning of the tapered region along the chain pitch line at the point of stress concentration during chain assembly reduces the initial wear of the pin and bushing from initial chain loading.

Abstract: A link chain having chain links interconnected at respective hinge points by a hinge bolt, at least one bearing bushing arranged on a hinge bolt, at least one roller arranged on said bearing bushing such that it is rotatable about the hinge bolt, and an axial retaining device attached to the hinge bolt and used for axially securing the bearing bushing and the roller. For reducing vibrations in the link chain, a bearing bushing is provided having an axial damping area on at least one end face area thereof, the damping area being formed integrally with the bearing bushing, and the bearing bushing being arranged such that the damping area rests against the axial retaining device.

Abstract: A low-noise chain member comprises a bushing, a roller and oil grooves in which a wedge or squeeze effect of a lubricating oil, which is interposed between the bushing and the roller, is effective in reducing noise. The oil grooves are provided on at least one of the outer surface of the bushing and the inner face of the roller. The inner face of the roller is formed with a curved surface so as to conform to the contour of a curved outer surface of the bushing. A clearance between the inner face of the roller and the outer surface of the bushing is not widened around both ends of the roller. Only a small amount of the lubricating oil between the roller and the bushing escapes to the outside, of the roller and bushing, so that a fluid lubricating state between the bushing and the roller is maintained.

Abstract: A power transmission roller chain includes pin links having pins spaced by one pitch and connected to each other by plates, and bushing links or “blocks” having bushings spaced apart from each other and rigidly connected to each other by plates. Two successive pin links are connected to each other by a bushing link having the bushings rotatably mounted on the pins. At least one pin link includes a central plate provided with pins alternately protruding from opposite faces of the plate offset from each other by a fraction of a pitch.

Abstract: A transmission chainformed of alternating outer chain links (2) and inner chain links (3), connected by pins (4);the outer chain links (2) and the inner chain links (3) being formed of outer plates (21) and inner plates (31);each outer plate (21) and inner plate (31) having two widened ends (23,33) each provided with a hole (25, 35) to accommodate the pin (4) and connected by a connection part (24,34) characterized in thatthe connecting parts (24,34) of the plates (21,31) comprise apertures (26,36) and the pins (4) are hollow.

Abstract: A random engagement roller chain sprocket for use primarily in automotive engine chain drive applications which incorporates different asymmetrical tooth profiles for improved noise reduction. In particular, the sprocket includes a number of first teeth each having a first engaging flank and a first disengaging flank, and a number of second teeth each having a second engaging flank and a second disengaging flank. One of the first engaging flanks cooperating with one of the first disengaging flanks or the second disengaging flanks of a first adjacent tooth to define a first asymmetrical tooth space for receiving a roller of an associated roller chain. The first asymmetrical tooth space including a first root surface between the one of the first engaging flanks and the first disengaging flanks or the second disengaging flanks. The first root surface being adapted for contacting a roller of an associated roller chain during rotation of the sprocket.

Abstract: A link plate for a roller chain has material added to the location on the link plate face where fatigue failure is most likely to occur in order to increase the fatigue strength of the link plate. This location is within a sector defined by a line extending radially from the aperture center in a direction perpendicular to the line connecting the two aperture centers and an imaginary line extending from the same aperture center toward the link plate end section at an angle of 30-45 degrees.

Abstract: A low noise chain has a bushing provided with a substantially cylindrical large diameter portion in an outer periphery of a central portion thereof. Inner plates are mounted respectively on opposite ends of the bushing. A hollow thin cylindrical roller, having inner peripheral surfaces opposed across a clearance, is capable of forming an oil film layer relative to an outer peripheral surface of the large diameter portion. The hollow thin cylindrical roller is rotatably externally fitted on the external outer peripheral surface of the bushing between the inner plates on opposite sides. A pair of O-rings is provided for sealing a clearance between both outer portions of the large diameter portion of the outer peripheral surface of the bushing and the inner peripheral surface of the hollow thin cylindrical roller. Outer plates are arranged on both outer sides of the inner plates on opposite sides. A chain pin rotatably extends through the bushing and has both ends mounted on the outer plates on both sides.

Abstract: A roller chain timing drive reduces noise by thinning the teeth and elongating the root land in between each pair of teeth. Specifically, through detailed calculation, the root land is elongated resulting in a reduced thickness of the teeth as measured across itself from a drive flank to a coast flank. The result is maintained contact of all rollers wrapped around a sprocket throughout the entire design life of the chain and sprockets which reduces noise.

Abstract: In accordance with the teachings of the present invention, a composite non-metallic and metallic chain for use in a waste water treatment system is provided. The chain includes a plurality of non-metallic chain link barrel connecting elements including central teeth receiving portions. Each of the barrel elements include first and second end portions extending from opposite ends of the teeth receiving portion. A plurality of metallic side bar members interconnect the non-metallic barrel elements and are rotatably coupled to the end portions of the barrel elements. A plurality of non-metallic bearing members are disposed about the end portions of the barrel elements between adjacent metallic side bar members for reducing friction and wear between the adjacent side bar members. A plurality of non-metallic clip members are secured with indentations formed in the end portions of the barrel elements for securing the metallic side bar members thereto.

Abstract: A ceramic drive system includes highly efficient, light weight, durable, and wear and abrasion resistant sliding and rotating components. In particular, the components of the ceramic drive system has center links, center rollers and sprockets arranged for sliding and rotating contact and each comprising high precision tetragonal zirconia polycrystal (TZP) ceramic or alternatively zirconia-alumina ceramic composite.

Abstract: A roller chain is provided with a bushing with a silent chain link profile. The bushing has a pair of depending toes which engage the teeth of a sprocket to provide power transmission.

Abstract: A chain includes a plurality of pairs of alternate inside links and first and second outside links, rollers and pins, wherein second ends of the first outside links and first ends of the second outside links each have a diameter greater than that of first ends of the first outside links and second ends of the second outside links, and each of the ends of the respective inside links has a diameter slightly smaller than that of the first end of the first outside link or the second end of the second outside link.

Abstract: A cutting chain is provided which includes facing inner side bars (12) and outside members (14) which have substantially the same height. Further, the leading inner ends of the inner side bars (12) and the trailing inner end of the outside members (14) have a reduced radius to increase wear life while giving the chain a preferred direction of travel.

Abstract: A roller chain assembly has pins extending through the outer links with minimal projection beyond the outside edge of the outer links. The minimal pin projection provides a chain assembly of narrow construction.

Abstract: The invention provides sealing members for a chain. A first pair of sealing members is provided for each end of a bushing. The sealing members of the first pair respectively surround the ends of the bushing and are housed between inner sidebar portions and the outer sidebar portions of the chain. A second pair of sealing members seals rollers surrounding the bushings.

Abstract: To provide a roller chain according to the present device pertaining to a bushed chain with an oil-impregnated sintered bushing fitted on a roller, which has an improved roller retaining power required during the sliding of the roller chain, and further requires no installation time and labor at the time of unlinking and linking of the roller chain, thereby preventing impairing or breaking each member. Pin diameter is increased to lower a bearing surface pressure to thereby improve wear resistance. Furthermore, the thickness of the sintered bushing axially supported on a pin is made nearly equal to that of the roller. According to the present device, the chain provided is a bushed chain with an oil-impregnated sintered bushing fitted on a roller, in which the working accuracy of the punched surface of a link plate has been improved, requiring no staking of a pin end face after installation.

Abstract: The present invention provides a roller chain for pin oven application, having an increased pin and bushing diameters for larger bearing areas. Decreased bushing and roller thicknesses provide increased bearing areas for prolonging chain life.

Abstract: The invention provides sealing members for a chain. A pair of sealing members is provided for each end of a bushing. The sealing members respectively surround the ends of the bushing and are housed between inner sidebar portions and the outer sidebar portions of the chain. Each of the sealing members includes a collar which is pressed onto one of the ends of the bushing and which is positioned in closely spaced relation to one of the inner sidebars. Each collar has a circumferential flange or outer and inner collar portions which extend toward and engage one of the outer sidebars. Each collar defines an annular groove surrounding the bushing. Each sealing member further includes a resilient sealing ring housed in each annular groove. Each resilient sealing ring surrounds the bushing and engages in a sealing relation with the outer sidebar engaged by the collar in which it is housed.

Abstract: A right outer link plate of a bicycle chain, when viewed from the rear and top, has a projection swelling outwardly on a center edge thereof to lead a tooth of a sprocket into an outwardly spread recess formed by the projection. A left outer link plate of the bicycle chain, when viewed from the rear end top, has a flat face outside and an outwardly tapered face along a central inside portion to lead a tooth of the sprocket into a recess formed by the tapered face. In a front multi - stage sprocket, unit the projection of the right outer plate catches onto a tooth of the large sprocket and the tooth slips into the outwardly spread recess formed by the projection, assuring that the chain shifts from the small sprocket to the large sprocket easily. Although the center edge on the right outer link plate swells outwardly, the front multi - stage sprocket unit has a comparatively wide space between sprockets, and the projection does not interfere with the large sprocket and disturb speed changes.