Abstract: A chain drive unit (4, 5, 6) for reducing chain vibrations comprising a chain wheel unit (43) with at least two sprockets (431, 432) that are arranged parallel on a common rotation axle, at least two parallel chains (51, 52) engaging these sprockets (431, 432). At least one damping element (6) connecting two adjoining chains (51, 52). The circumferential orientation of two adjoining sprockets (431, 432) differs by a partial pitch (pP) and the damping element (6) comprises a first fixation (61) on its one free end for the lateral fixation to the first chain (51), a second fixation (62) on its opposite free end for the lateral fixation to the second chain (52) and a force transmission unit (63, 8, 9) arranged between the first and the second fixation transmitting an applied force from the first fixation (61) to the second fixation (62) and vice versa.

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 connection unit of a chain includes two outer link plates each having a first hole and a second hole. The second hole has a first recess and a second recess which communicates with the first recess. The first recess has a diameter larger than that of the second recess. The second recess includes an inner surface and a stepped engaging surface which is perpendicular to the inner surface. A stop surface is perpendicularly connected to the engaging surface. At least one first protrusion extends from the inner surface. A pin is securely fixed in the first hole and includes an engaging portion. A neck is located beside the engaging portion and has a diameter smaller than that of the engaging portion.

Abstract: A drive chain for a window or skylight operator. The chain is configured to define a rigid predetermined shape when flexed in a first direction, while still enabling the chain to be coiled for storage in a housing when flexed in the opposite direction.

Abstract: A sprocket chain formed by several pivotally interconnected chain links that have at least one central plate and at least two cover plates which are arranged on both sides of the central plate. The cover plates and the central plate are interconnected using at least two connecting members. The chain links also have at least two inner plates which are arranged between the cover plates and the central plate and pivotally interconnect the chain links. The total width of a bunch of plates formed by the central plate, the cover plates, and the inner plates, divided by the total number of plates, which is formed by the sum of the central plate, the cover plates, and the inner plates, is greater than or equal to 1.4 mm.

Abstract: The chain comprises a plurality of external links (2), each defined by a pair of parallel external plates (4, 5) and by two rotation pivots (6) interpositioned between the two external plates (4, 5). The chain also comprises a plurality of internal links (3), each defined by a pair of parallel internal plates (7, 8) and by two bushes (9) interpositioned between the plates and each internal link (3). Each of the rotation pivots (6) is inserted coaxially in a bush (9) and so defines an alternated succession of external links (2) and internal links (3) and defines with the bush (9) a spherical coupling surface. The chain also comprises anti-rotation elements (12) for reducing a possibility of rotation with respect to an alignment direction of each pair of adjacent links (2, 3).

Abstract: The end faces of a first pin contain bulging curved faces having an egg-like shape, when viewed along a chain width direction. Each bulging curved face includes a first end portion, a second end portion and a maximum width portion with respect to a chain advancing direction. With respect to perpendicular directions, the distance between the center of the maximum width portion and the first end portion is relatively large, whereas the distance between the center of the maximum width portion and the second end portion is relatively short. It is possible to enlarge the surface area of the bulging curved face.

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 power transmission chain includes a plurality of links and a bending-restraining mechanism. The bending-restraining mechanism includes a wire extending in a lengthwise direction along the chain and engaging at least three adjacent joints of the chain. The wire is formed such that it elastically deforms when an inside link rotates around the inner joint in a first direction from a linearly extending state, the wire thereby applying a bending resistance to the inside link during articulation of the chain. In one embodiment, the wire includes at least one curved section clipped around at least a majority of a circumference of at least one joint. In another embodiment, the wire is formed such that a predetermined bias due to a bending deformation of the wire is applied to the inside link when the chain is extended linearly.

Abstract: Device for stretching a transmission chain closed in itself and comprising pairs of elongated rocker elements mutually coupled by links, said rocker elements being destined for a torque transferring cooperation with the pulley sheaves of a pulley sheave transmission, and comprising a first and a second supporting surface which support a chain to be treated over an angle of an arc and having an adjustable mutual distance to generate tensile stresses in the chain supported thereby, in which the first supporting surface is freely rotatable accommodated between the first ends of two distant frame parts, the second supporting surface is freely rotatable accommodated on an auxiliary carrier between the two frame parts, said carrier being provided with two opposite stubby shafts, protruding there from and of which the axis lies at a distance from the axis of rotation of the second supporting surface which is rotatably supported by said auxiliary carrier and lies near the second end of the frame parts while of said s

Abstract: A closing link for a bicycle chain that includes a first outer link plate having a first elongated hole and a first chain pin extending therefrom and a second outer link plate having a second elongated hole and a second chain pin extending therefrom. The first chain pin is received in the second elongated hole and the second chain pin is received in the first elongated hole Each chain pin has a head at one end, a foot at the other end and a groove therebetween. Each elongated hole has a larger diameter end, a smaller diameter end and a displacement region therebetween. The larger diameter end has a diameter larger than a diameter of the pin head. The smaller diameter end receives the groove of the chain pin and includes a countersink to receive the pin head. The displacement region includes sides having recessed and unrecessed portions. The recessed portions have a smaller depth than a depth of the countersink at least in the region of the countersink.

Abstract: A drive chain suitable for use in a continuously variable transmission of a motor vehicle, the transmission having two pairs of spaced drive members about which the chain passes to transfer torque from one drive member to the other. The chain includes a plurality of link elements that include spaced, side-by-side plate links. The plate links include openings in which pairs of parallel rocker members are disposed for relative rocking movement of at least one rocker member about its longitudinal axis. A method for stretching the chain is also disclosed, in which areas of some of the plate links are plastically deformed by stretching the chain before the chain is put to use.

Abstract: A closing link for a bicycle chain that includes a first outer link plate having a first elongated hole and a first chain pin extending therefrom and a second outer link plate having a second elongated hole and a second chain pin extending therefrom. The first chain pin is received in the second elongated hole and the second chain pin is received in the first elongated hole Each chain pin has a head at one end, a foot at the other end and a groove therebetween. Each elongated hole has a larger diameter end, a smaller diameter end and a displacement region therebetween. The larger diameter end has a diameter larger than a diameter of the pin head. The smaller diameter end receives the groove of the chain pin and includes a countersink to receive the pin head. The displacement region includes sides having recessed and unrecessed portions. The recessed portions have a smaller depth than a depth of the countersink at least in the region of the countersink.

Abstract: A drive chain suitable for use in a continuously variable transmission of a motor vehicle, the transmission having two pairs of spaced drive members about which the chain passes to transfer torque from one drive member to the other. The chain includes a plurality of link elements that include spaced, side-by-side plate links. The plate links include openings in which pairs of parallel rocker members are disposed for relative rocking movement of at least one rocker member about its longitudinal axis. The rocker members extend outwardly beyond the plate links and are retained in position by retaining members that engage particular rocker members. A method for stretching the chain is also disclosed in which areas of some of the plate links are plastically deformed before the chain is put to use.

Abstract: In a chain belt (1) for a continuously variable cone-pulley transmission of a vehicle, lengthwise links (3a, 3b, 3c) are connected by transverse coupling members (2a, 2b) passing through openings (4) in the links. Retainer elements (7) at the ends of the coupling members serve to secure the links against falling off the coupling members or becoming misaligned. The retainer elements are attached to at least selected individual coupling members by resistance welding.

Abstract: Method for chain drive, whereby the chain, such as a transmission chain, conveyor chain and/or like, is formed of several shaped pieces (1), that are connected to each other one after another at jointing points (N) by means of joint pins, and that is being driven by means of a wheel arrangement, that includes at least one chain wheel (7), such as a drive wheel, a turning wheel or the like. Particularly wearing of the chain, that is due to bending of the chain essentially along the longitudinal direction (p) of the joint pins, is being minimized by taking advantage of joint pins (x), the cross section of which changes in the longitudinal direction (p). The invention also relates to chain functioning according to the method.

Abstract: A chain and sprocket system includes a plurality of chain assemblies and phased or offset sprockets. The individual chain assemblies are interconnected by a retention bracket to form a single composite chain assembly.

Abstract: In a chain lock for link chains with a plurality of lock parts (1,2) the lock parts (1,2) are connected with each other by projections. For increasing the load-bearing capacity of the chain lock the projections (5-10) in the area of the transition of their feet into the lock parts (1,2) are provided with impressions effected by depressions (17) which impressions lead to compressive stresses which influence positively the stress conditions in the loaded lock.

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: Drag chain link and pin construction providing press fit nonrotational seating of pin ends in bifurcated boss ended arms of each link thereby excluding introduction of abrasive, wear producing particles, particularly encountered in cement manufacturing kilns.

Abstract: A retaining clip, which is essentially a C-shaped member, is used to retain the pivot means or joint members of a chain or chain-belt in assembled relationship. The clip spans the chain, and the clip ends engage the pivot means and/or the side links of the chain. The clips can be fabricated from spring steel, spring wire or a plastic.

Abstract: A transmission chain for a conical disk transmission with intercoupled links receiving link pins of which the end surfaces bear against the disks, and in which the contact zones between the longitudinal sides of the pins and the links are shorter than the upright sides of the link openings and offset in longitudinal direction of the links with respect to the ends of these sides.

Abstract: A power transmission roller chain link construction comprises a first link pin plate with a pair of spaced apart substantially parallel link pins secured to said plate in a press-fit so that they extend parallel to the plate. A bushing is fitted over each pin and a roller link plate is press-fitted on the bushing adjacent each of its ends. A roller is rotatably mounted on each bushing between the roller link plates. The link pins, link pin portion and a rod portion extending outwardly from each link pin portion beyond the second link plate, the second link plate being press-fitted to the link pin adjacent their opposite ends from the first link plate. The rod portion of each link pin has a threaded area adjacent the second link plate and a nut is threadably engageable on the threaded area. The link is manufactured by first press-fitting the link pins to the first pin link plate thereafter assembling the bushing with the roller link plates at each end over the pin and assembling a bushing between the plates.

Abstract: A track block for a track-laying vehicle. The block is characterized by an elongated unitary beam, with two diverging links extending radially in a common direction from opposite ends of the beam. The links are constructed to straddle, and to be hinged to, the beam in an adjacent block. Cantilevered from a central portion of the beam, and extending generally in the same direction as and coplanar with the links, is a road-wheel bearing plate, through which received road-wheel bearing forces are carried directly to the links solely through the beam.

Abstract: A T-headed pin for use in rivetless chain, generally of the trolley conveyor type, is disclosed. The pin can entirely replace the conventional forged pin of any ordinary size and has superior design matching abilities. It is unique in that it is constructed entirely from a flat piece of sheet metal. Rectangular metal blanks with paired oppositely projecting tabs are provided. The blank is first curled to form the body of the pin with the tabs projecting endwise therefrom. In automated manufacture of chain of the type mentioned in selected lengths, the links may be readily assembled with curled pins having tabs projecting axially from both ends. The tabs may then be bent as required to complete the chain length. Alternatively, the tabs at one end only may be bent and lengths of chain may be readily assembled by inserting the other end of each pin into place and then bending the tabs at said other end.