Abstract: The present invention relates to the case hardening, tempering and coating of a medium carbon alloy chain pin. A medium carbon alloy chain pin is provided and is case hardened to a selected radial depth. The case hardened chain pin is quenched and then tempered to introduce a gradient from the surface of the chain pin inwardly in carbon content and hardness. The chain pin is then coated with an electroless nickel and fluorinated carbon co-deposition to increase surface hardness.

Abstract: A transmitting chain is provided which can lower surface pressure between a bushing and a pin, which can well maintain a lubricating state, and which is high in durability so as to be capable of withstanding high load. A groove or a depression, into which lubricating oil, supplied from outside of the chain, is moved, is formed in at least one of a group including an inner peripheral surface of a bushing and an outer peripheral surface of a pin. A difference, space, or clearance, located between an inside diameter of the bushing and an outside diameter of the pin, of portions of the chain not including the groove or depression, is set in a range of from about 0.05 to 0.6% of the outside diameter of the pin.

Abstract: A chain capable of diminishing noise and wear occurring at the time of engagement of the chain with a sprocket is provided. At least a portion of an inner surface of each inner plate, which comes into opposition to a side face of a tooth top of the sprocket at the time of engagement of the chain with the sprocket, is chamfered in a shape conforming to the contour of a side tooth form of the sprocket tooth top. Since a chamfered portion of an inner surface of each inner plate has a shape conforming to the contour of a side tooth form of a sprocket tooth top, the chamfered portion and the sprocket tooth top come into contact with each other smoothly in a state of face-to-face contact, so that the level of noise generated upon engagement of the chain with the sprocket can be reduced and it is possible to suppress the wear of the inner surface of the inner plate and that of the tooth top of the sprocket.

Abstract: A chain consists of at least a pair of chain links, a pair of side plates mounted between the chain links, a chain roller composed of at least two rolling elements mounted between the side plates, and a rivet extending through the chain links, the side plates and the rolling elements, wherein the rivet is tightly fitted with the chain links and loosely fitted with the side plates and the rolling elements so that the side plates and the rolling elements can have a pivotable movement relative to the chain links and the rivet.

Abstract: The present invention improves accuracy in the axial dimension of rolled parts for a chain such as bushings, rollers and similar. A rolled part is manufactured by cutting a strip of steel into a rectangular shape to obtain a rectangular base material having a predetermined dimension, The rectangular base material is rolled into a clindrical shape to obtain a cylindrically formed part having cut end surfaces face each other. A core is inserted for rolling the rectangular base material into the cylindrically formed part. The cylindrically formed part is then pressed through a die having a circular opening. The rolled part has a plurality of blind grooves on a surface thereof. While the cylindrically formed part is being pressed through the die having a circular opening, a plastic flow of the material of the cylindrically formed part intensively occurs in a direction toward the blind grooves.

Abstract: A sealed roller assembly (10) for hingeably connecting pairs of link plates (34) to form a chain (11), comprises a roller (12), a bushing (14) rotably mounted inside the roller (12), and a pin (16) rotably mounted inside the bushing (14). One pair of link plates (34) are mounted to the bushing (14), and another pair of link plates (34) are mounted to the pin (16). Seals are positioned between the adjoining surfaces of the roller (12) and the bushing (14) and the adjoining surfaces of the bushing (14) and the pin (16) to prevent contamination of the adjoining surfaces. Additionally, the roller assembly (10) can utilize a reservoir (28) containing a pressurized, fluid lubricant and a pressure accumulator (30) to continuously supply lubricant to the adjoining surfaces of the roller assembly (10).

Abstract: A chain structure for bicycles is composed of a series of inner chain plates, outer chain plates, rollers, and pins. Each inner plate has three arcuate peripheries at respective ends and slanting surfaces along one side of the arcuate peripheries. Each outer plate has also three arcuate peripheries at respective ends and slanting surfaces along one side of the arcuate peripheries. The slanting surfaces of the inner chain plates and outer chain plates are adapted to facilitate engagement of sprocket teeth with the chain plate.

Abstract: A roller chain for use in drawing paper webs through a web-fed rotary printing press utilizes a plurality of pairs of roller wheels, each joined by transverse roller pins and with each pair of wheels connected to the next adjacent pairs of roller wheels by longitudinally extending leaf-spring plates. The roller chain is capable of twisting and lateral deflections in a direction of the axis of rotation of the roller wheels.

Abstract: In a roller chain having a seal between inner and outer link plates, an encircling member is provided which surrounds the seal to reduce entry of foreign particles and maintain minimum separation between the link plates.

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: A chain structure is provided which includes a base plate having a pair of integral cylinders extending from one side. A connecting plate has a pair of elliptically contoured apertures at respective ends adapted to receive the corresponding cylinders. Each of the cylinders has an annular groove formed in a top portion with tapered surfaces. Each of the apertures has a pair of tapered walls at respective sides adapted to matingly engage with the tapered side walls of the connecting plate when the connecting plate is inserted into the base plate and the apertures are aligned in the annular grooves.

Abstract: A chain structure is provided which includes a base plate having a pair of integral cylinders extending from one side. A connecting plate has a pair of elliptically contoured apertures at respective ends adapted to receive the corresponding cylinders. Each of the cylinders has an annular groove formed in a top portion with tapered surfaces. Each of the apertures has a pair of tapered walls at respective sides adapted to matingly engage with the tapered side walls of the connecting plate when the connecting plate is inserted into the base plate and the apertures are aligned in the annular grooves.

Abstract: A knuckle connector is used to connect spacedly end knuckles of a chain strand to form a chain loop. The knuckle connector includes a pair of link units, each of which has a link pin and an oval-shaped link plate formed with a circular through-hole on one end and a retaining hole on an opposite end. The link pin has a head secured in the through hole and a tail end formed with a peripheral channel. The link pin of one of the link units extends through a pin hole formed in a corresponding one of the end knuckles such that the peripheral channel initially extends into a large insert part of the retaining hole in the link plate of a remaining one of the link units. The peripheral channel of the link pin of one of the link units engages the link plate of the remaining one of the link units in a diameter-reduced retaining part of the retaining hole when the end knuckles are pulled apart.

Abstract: A roller chain for a paper infeed device of a web-fed rotary printing machine utilizes a plurality of fork shaped butt straps which are arranged in sequential inverted order. Fork ends of adjacent butt straps are carried by a roller axle bolt. Base portions of adjacent butt straps are connected by a hinge pin.

Abstract: A push-pull chain having a lock mechanism provided between inner links and outer links, which are rotatably coupled together by link pins, to thereby permit the mutual pivotal movement of both links to be restricted. The lock mechanism is provided to both links on an axial line parallel to each link pin. As a lock pin moves parallel on the axial line and it is fitted in both links, the mutual pivotal movement of the links is locked.

Abstract: A roller chain for bicycles comprises a plurality of outer links each having a pair of outer plates each having two pin holes, two pins extending through the pin holes and connecting the outer plates of each of the outer links with one another, a plurality of inner links arranged alternately with the outer links and each having a pair of inner plates each provided with a bearing collar defining an inner hole and carrying a roller. The inner holes have a cross-section which is elongated in a longitudinal direction. At least one of the pin holes in the outer plates and the inner holes in the bearing collars are offset so that a roller pitch of the inner and outer links in a stretched state of the chain is adjusted substantially to the same value.

Abstract: A rigid drive assembly is constructed of two interconnected, flexible chain elements.

Abstract: A chain has pairs of inner sheets and pairs of outer sheets. Each sheet has two rings. An annular flange is formed on each ring. An inner surface of an opposite end to a free edge of each annular flange is rounded so as to form a recess. Each annular flange of the outer sheet is received in the recess of one inner sheet. A pin is inserted through the annular flanges of a pair of inner sheets and a pair of outer sheets. Both ends of the pin are deformed so as to be received in the recesses of the outer sheets.

Abstract: A roller chain having a thrust ring between a roller and a link plate for sustaining the transverse load, in which a thrust ring is made of bearing materials and has a sealing part in order to be put into the hole part formed on the end face of the roller to reserve the lubricant.The sealing part prevent the lubricant from effluxing and prevent the dust from intruding into the inside of the roller.

Abstract: A conveyor or chain having a tubular filament-wound cylindrical element used as the pins interconnecting the link plates and/or as rollers or bushings in the chain assembly. The element is formed from a length of tubular material which is wound on a mandrel having an outside diameter equal to the inside diameter of the tubular element. The filament of the winding is a long aramid fiber which is integrated in the tubular material by an adhesive agent.

Abstract: Bicycle Chain is made of alternating bushing links and pin links. The bushing links have parallel bushings held in interference fit in bushing plates and extended axially beyond the bushing plates, solid metal rolls with a lubricating plating are held loosely on the bushings, and loosely between the bushing plates. The bushings extend axially outward beyond the bushing plates for substantial distances. Pins extend through the bushings and are fixed in pin plates to form pin links which alternate with the bushing links. The pin plates are held outward from the bushing plates for a substantial amount by the axial bushing extensions to prevent dirt build up. The pin plates, bushing plates and bushings are plated with an anti-corrosion plating. The pins and rolls are plated with a porous metal plating with solid polymeric lubricant held within pores of the plating for lubricating the pin-bushing interior interface and for lubricating the roll-bushing and roll-bushing plate interfaces.

Abstract: An overload detection and safety arrangement for a load carrying link chain, including a fuse link having link plates connected by a fuse bar of a tensile strength less than the tensile strength of the remainder of the load carrying chain, the fuse link being laced into the remainder of the chain. The fuse bar is designed to break under predetermined overload conditions, but is positioned and arranged to carry normal tensile loads on the device. A safety link, offset from but substantially parallel to the line of tension through the fuse bar, connects the link plates. The safety link has a tensile strength greater than the tensile strength of the fuse bar and at least substantially equal to the tensile strength of the remainder of the chain, the safety link holding the load when the fuse bar breaks due to overload conditions.

Abstract: The assembly machine of the present invention automatically assembles chain elements into a continuous chain at a high speed. The machine automatically aligns and assembles elements into assembled relation and includes structure for aligning a pair of side links with a first center link, structure for assembling a first pin in assembled relationship with the pair of side links and first center link, structure for aligning a second center link with said pair of side links, structure for assembling a second pin in assembled relationship with the pair of side links and second center link, and structure for advancing assembled chain elements.

Abstract: A blank, having a pair of parallel bushing forming strips that are intermediately connected by a web, is formed from stock. The blank is bent and curled in a progressive die to form a bushing link that includes a pair of cylindrical bushings integral with the web. Rollers can be slipped longitudinally over the bushing ends opposite from the web and an inside plate is welded to the bushing ends to form a roller link. Such roller links are alternately arranged with pin-links to form a roller chain. A bushing chain can be formed in essentially the same manner as the roller chain by omitting the rollers from the bushing links.

Abstract: This invention relates to a method and apparatus for the continuous production of link-chains comprising alternate inner links and outer links, two inner links being connected by an outer link, each inner link being formed by a lower plate and by an upper plate, each of which is provided with two coaxial holes receiving a bush carrying a freely rotatable roller, each outer link comprising a lower plate and an upper plate joined by two pins inserted to pass through the corresponding bush of the inner link, to which the outer link is connected.

Abstract: A blank, having a pair of parallel bushing forming strips that are intermediately connected by a web, is formed from stock. The blank is bent and curled in a progressive die to form a bushing link that includes a pair of cylindrical bushings integral with the web. Rollers can be slipped longitudinally over the bushing ends opposite from the web and an inside plate is welded to the bushing ends to form a roller link. Such roller links are alternately arranged with pin-links to form a roller chain. A bushing chain can be formed in essentially the same manner as the roller chain by omitting the rollers from the bushing links.