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

Abstract: A vacuum-generating dynamic transmission system includes a first pulley fixed for rotation about a first axle and a second pulley fixed for rotation about a second axle. A chain rotates around the axles and the pulleys. The chain has a plurality of links, one or more of the links having a vacuum-generating device that pressurizes the chain to at least one of the pulleys. The vacuum generating device includes a movable inductor protruding from a central channel on a first side of the link, and a movable abductor within the channel and proximate a second side of the link. The first side of the link contacts a conical semipulley of the first pulley and the second side contacts a cylindrical semipulley of the first pulley, opposite the conical semipulley, as the chain rotates through the pulley. a conduit provides pneumatic communication from the central channel to the outside environment.

Abstract: A drive sprocket for driving a modular belt having a plurality of belt modules with intercalated link ends connected by transverse pivot members to form hinges. The belt modules may have transverse ribs. The drive sprocket is driven by a shaft. The drive sprocket has a central opening for receiving the shaft. The body has a plurality of teeth disposed in pairs along a periphery of the body. The body has a first opening formed between adjacent pairs of teeth and extending toward the center of the sprocket to provide access to the hinge area, when the belt engages with the sprocket, for application of cleaning fluid.

Abstract: A torque transfer device allows torque to be input at one point of the device and transferred to another point of the device, at which the power or torque is taken from the device. The device incorporates a continuous direct drive comprised of a plurality of alternating pins and links which advance each other to provide the drive. The direct drive communicates with drive sprockets, traveling through the drive sprockets to rotate the drive sprockets to transfer torque.

Abstract: A chain-type driving force transmitting apparatus includes a case having a lower space accumulating therein lubricating oil, an input shaft rotatably supported by the case, an output shaft arranged in parallel with the input shaft and rotatably supported by the case, and a chain wound around the input shaft and the output shaft and lifting up the lubricating oil accumulated in the lower space of the case. The chain-type driving force transmitting apparatus further includes a separator positioned adjacent to the chain and dividing the lower space of the case into a first chamber housing the chain and a second chamber. The separator has an inclined portion formed at an upper end of the separator and inclining towards the chain so as to receive the lubricating oil lifted up by the chain, wherein the lubricating oil received by the inclined portion flows into the second chamber.

Abstract: In a silent chain for an automobile engine timing drive, the pins which interconnect the link plates of the chain have a vanadium carbide layer formed on their surfaces by diffusion penetration. The vanadium carbide layer is composed of two parts: an inner part, on the steel base material of the pin, being a V8C7 layer, and an outermost part being a V2C layer.

Abstract: Two kinds of pins having rolling contact surfaces of different shapes are used as first pins. A recess is formed at that portion of the first pin disposed between a chain outer periphery-side edge portion thereof and the rolling contact surface thereof. A straight portion is formed at that portion of the second pin disposed between a chain outer periphery-side edge portion thereof and the rolling contact surface thereof. With this construction, the two kinds of pins can be easily discriminated from each other from their appearance.

Abstract: An easy-to-clean conveyor with sprockets that reveal the hinge area of a modular conveyor belt to a fluid spray. A conveyor includes a modular belt constructed of rows of belt modules hingedly linked together in series by hinge pins into an endless belt loop. A sprocket, mounted on a shaft for rotation, engages an inner surface of the belt in driving or driven contact. The sprocket extends from a central bored hub to an outer periphery, which is arranged to engage the inner surface of the belt along an area of contact that varies laterally across the inner surface of the belt in each rotation of the sprocket.

Abstract: According to the invention, the resistance of the links of a D-profile chain may be increased, whereby the transitions between the flanks (2, 3) and the outer planar bearing surfaces of the links comprise roundings of radius r, which is 0.2 to 0.4 times the value of the separation (A) between the flanks of the chain links.

Abstract: A chain, a chain wheel and a chain transmission for a lifting gear in accordance with the present invention increases the dynamic resistance of a round steel chain that is primarily intended for use in combination with a lifting gear. The chain members (5, 6) are locally deformed plastically in the area of their braces (9, 10) so as to form flat lateral zones (11).

Abstract: Star carrier roller assemblies have been used in certain tracked mobile machines, such as those used in the timber industry, that must operate in cold weather and/or over rough terrain. Due to interaction of the star carrier roller assembly with a track chain assembly, undesirable wear on the star carrier roller assembly occurs. The present invention includes at least one star carrier roller assembly for a tracked mobile machine that limits the wear on the star carrier roller assembly. The star carrier roller assembly includes a carrier roller positioned adjacent to a sprocket having a plurality of teeth. Each tooth includes a tooth width and a tooth angle. A ratio between the tooth width and a difference of a pitch length and a bushing diameter of a track chain assembly is less than 0.3, and the tooth angle is greater than or equal to zero degrees (0°).

Abstract: A chain drive for pivot chains (7) or round link chains (8) having spur gears (2) and a polygonal chain wheel (10) reduces variations in velocity and acceleration transferred to the chains (7), (8). The driven gear wheel (3a) and the driving gear wheel (4a) consist of noncircular gear wheels having a set gear ratio adjustment so that the driving gear wheel (4a) is put in such a position to the driven gear wheel (3a) so that the slowest angular velocity coincides with the corners (29a) of the polygon of the chain wheel (10) and the fastest angular velocity occurs at the middle of the polygon straight lines (29b) of the chain wheel.

Abstract: The present invention relates to a chain drive, in particular camshaft/camshaft drive for an automotive engine, the chain drive comprising at least two chain gears and a drive chain. Such a chain drive shall be made more compact without excessively great losses in its low-noise characteristics. To this end at least two chain gears are arranged in laterally offset relationship with one another in axial direction. The drive chain is a multiple-track chain. Each of the offset chain gears has assigned thereto a separate track of the multiple-track chain due to the lateral offset. The tip diameters of the offset chain gears are overlapping.

Abstract: A chain drive assembly for elevating a load such as a vehicle carriage on a leisure ride. The assembly comprises an endless loop lift chain and a plurality of drive chains. The lift chain has a plurality of chain links comprising a pair of laterally spaced outer link plates pivotally connected to inner link members disposed at least in part between the outer link members. The inner or outer link members of each link has a row of teeth for engagement in openings between links of the drive chains. The drive chains being disposed so as to engage the teeth at a rectilinear stretch of the chain loop so as to drive the chain in a longitudinal direction. The inner and outer links of the lift chain being arranged to define an opening designed to receive a projection on said load. The assembly serves to spread the load between the drive chains and their drive systems. The conveyor chain does not articulate under load and can be reduced in weight.

Abstract: A roller chain and sprocket drive includes a roller chain having multiple rollers and articulated links, the rollers being arranged with a substantially constant pitch and connected by the articulated links, and a sprocket in driving or driven engagement with the roller chain.

Abstract: A positioning device comprising a first flexible member and a second flexible member which can be engaged to form a rigid member, wherein said first flexible member comprises a chain provided with a plurality of compression members, and said second flexible member comprises a locking chain which, when said first flexible member and said second flexible member are brought together inhibits separation of said compression members, characterized in that said compression members are planar.

Abstract: A silent chain and sprocket combination includes a silent chain having a plurality of interleaved links, each link having a pair of teeth, with each tooth having an inner flank and an outer flank. The links of the chain engage the sprocket teeth on their inside flanks during initial engagement and full engagement. The sprocket tooth has a flank shape with a first part that matches the lower portion of the shape of the inside flank of the link tooth and a sprocket tooth flank shape with a second part that matches the upper part of the link tooth shape.

Abstract: The invention relates to a chain elevator comprising an elevating chain (1) made up of links (2) attached to each other, whereby the planes formed by adjacent links are primarily at a 90° angle in relation to each other; an elevating element (3) having a driven chain gear (7) arranged to it, the elevating chain (1) being led to couple with the driven chain gear from the fixing point (9) of the fixed end (8) of the elevating chain located above the driven chain gear (7); and a driving chain gear (100) located above the driven chain gear (7), the elevating chain being led to couple with the driving chain gear from the driven chain gear (7).

Abstract: A lockable chain winder for opening and closing windows has an internal mechanism which includes a stop member (16) which can be moved to engage with the chain winder sprocket (15) in such a manner that the sprocket (15) can freely rotate on one direction, but not in the other direction.

Abstract: In a roller chain sprocket for a chain drive, the profile of each tooth comprises a proximal portion (AB), an intermediate portion (BC) and optionally a distal portion (CD). The proximal portion (AB) is shaped like an arc of a circle with a radius (r) at least as large as the radius (r.sub.r) of each roller of the chain. The intermediate portion (BC) has a complex curvature defined by mathematical equations, whereas the optional distal portion (CD) is shaped like an arc of a circle with a radius R, equal to the pitch minus the radius of the roller.

Abstract: This invention relates to a chain drum arrangement for a central or double central scraper chain conveyor, comprising a divided chain wheel, the shell-type chain wheel segments of which are attached, locked in rotation and detachably, via an axial splined portion to the shaft, wherein the chain wheel is secured in its installed position on the shaft by means of locking rings disposed on both sides and at least one of these two locking rings consists of a divided locking ring which can be taken off radially from the shaft in order to remove the divided chain wheel from the shaft. According to the invention, the divided locking ring is disposed as an intermediate ring between the divided chain wheel and a hollow journal which receives the respective shaft bearing and which projects axially from the respective side cheek of the machine frame into the interior space thereof, which results in a narrow mode of construction of the divided locking ring.

Abstract: An improvement of multi-stage sprocket assembly for bicycle includes at least a small sprocket and a large sprocket. The large sprocket includes at least two different sets of teeth. The large sprocket defines a radial second center line across the thickness thereof while the first set of teeth each defines a first center line across the teeth crest and parallel to the second center line. The first center line is moved away from the second center line in an opposite direction of the small sprocket. The second set of teeth includes at least two consecutive special teeth. The first special tooth has a recess formed under the root in a lateral side facing the small sprocket to avoid interference with the chain during shifting movement. The second special tooth has its first center line moving away from the second center line of the large sprocket toward the small sprocket for engaging with the chain at a small rotation angle without raising the chain or changing the tension of the chain during shifting movement.

Abstract: A bicycle sprocket set is composed of a small sprocket and a large sprocket coaxial with the small sprocket. The large sprocket is provided with an axially oriented recess in the bottom portion located between the first tooth and the second tooth of the large sprocket. The recess has a support curved face extending from the second tooth. The large sprocket is further provided with a support protrusion located under the support curved face such that the support protrusion is separated from the support curved face by a distance corresponding to about one tooth pitch. The support curved face and the support protrusion serve to support the inner and the outer chain plates of a drive chain at such time when the gearshifting takes place.

Abstract: A chain drive (1), in particular for lifting devices, having a chain (3) which rotates about a chain wheel (2) and whose oval links (6) which are rotated in an alternate manner about 90.degree. interact as vertical and horizontal links with the chain wheel, wherein the horizontal links (6i) are received in pockets (7) of the chain wheel with substantially planar support surfaces (6) and can be supported with their curved ends (6') on teeth (10) which comprise convex flanks (12) and the vertical links (6s) are positioned in a groove (11) between the teeth, wherein the wire cross-section of the chain links (6) is a rectangle having a curvature adjoined thereto towards the inner part of the link and the convex flanks (12) and the planar support surfaces (8) contact each other in a substantially direct manner, i.

Abstract: A method for assembling an apparatus that removes solid waste material from a stream of water. The apparatus sits in a channel within which the water containing waste material flows. A plurality of vertically oriented, laterally spaced apart, rotating screens are driven by sprocket segments and provide a filtering function. The screens are formed by plural loops of articulated links. Each link includes a horizontally-extending part that lifts solid matter from the stream as the screens rotate. The assembly method includes placing the links on shafts in a predetermined pattern that creates a frusto-conical space bordered by links. The frusto-conical space provides ample clearance space for each sprocket segment and ensures that the sprocket segments will not rub against the links which in turn prevents the parts of the apparatus from becoming misaligned with respect to one another so that the apparatus may operate for extended periods of time without requiring adjustment.

Abstract: A composite gear member and gear set using the composite gear member is provided. The composite gear member is formed of a generally circular disk having a pair of link plate supporting surfaces separated by a central section. A roller chain which includes a plurality of rollers rotatably mounted on support pins extends between link plates. The chain is reeved around the disk with the link plates being supported in the grooves on the link plate supporting surfaces. Retaining devices in the form of retaining plates or pins are connected between the chain and the disk to restrain circumferential movement of the chain with respect to the disk. This also prevents circumferential slipping of the chain.If the mounting of the chain on the disk is by a retaining plate device engaging the link plate, a single strand of chain is utilized to form the entire gear member, with the second toothed gear being arranged to drivingly engage the rollers.

Abstract: In one embodiment, the invention comprises at least one and preferably a plurality, of rollers provided with recesses which are mounted on the drive and trailing assemblies of a conveyor system. The recesses of each roller include abutment surfaces angularly disposed relative to the central axes of their respective drive or trailing assemblies and are sized to receive, support and align the belt. Alternative embodiments employing polygonal rollers, rollers with a single wall forming two angled abutment surfaces and rollers with support surfaces disposed to receive multiple belt segments are also provided. The rollers, in addition, may include sets of the recesses distributed in circumferential rows about their periphery, including an odd number of sets of recesses to reduce wear on the roller. A method for estimating the optimum size and configuration of the rollers of the invention for helical woven wire endless belts is also provided.

Abstract: In one embodiment, the invention comprises at least one, and preferably a plurality, of rollers provided with recesses in their peripheral surfaces and mounted on the drive and trailing assemblies of a conveyor system. At least one side wall of each recess is angularly disposed relative to the central axes of the respective drive or trailing assemblies and the recesses are sized to receive therein a portion of the belt contacting the rollers. The bottom and side walls of the recesses act against the engaged portion of the belt to propel the belt through the system, support the belt and maintain the belt in proper tracking alignment. Alternative embodiments employing polygonal rollers, alternately slotted rollers and rollers with "single sided" recesses are also provided.

Abstract: A bicycle multiple sprocket assembly comprises at least two adjacent sprockets which include a larger sprocket and a smaller sprocket. A chain takes a shifting path extending from a selected furrow of the smaller sprocket toward a selected furrow of the larger sprocket at the time of shifting from the smaller sprocket to the larger sprocket. At least two teeth of the larger sprocket immediately following the selected furrow of the larger sprocket with respect to the forward rotational direction of the sprocket assembly are rendered circumferentially asymmetric. The leading edge of each asymmetric tooth is provided with a support face which is offset rearwardly for supporting the shifting chain adjacent a chain link connection.

Abstract: In one embodiment, the invention comprises at least one roller with a plurality of recesses in its peripheral surface, mounted on the drive and trailing assemblies of a conveyor system. The recesses of each roller are angularly disposed relative to the central axes of their respective drive or trailing assemblies and are sized to receive a portion of an endless conveyor belt contacting the rollers. The bottom and size walls of the recesses act against the engaged portion of the belt to propel the belt through the system, support the belt and maintain the belt in proper tracking alignment. The recesses are preferably distributed in circumferential rows about the periphery of the roller and, in multi-row rollers, in a parallel relation across the width of the roller. A method for estimating the optimum size and configuration of the rollers of the invention for helical woven wire endless belts is also provided.

Abstract: In a power-assisted chain drive actuator for opening and closing gating fixtures, a drive chain has successive links formed of pairs of plates being parallel and swivel connected to each other by crosswise studs having an increased middle diameter holding the plates apart; the chain is also provided with members for limiting the relative angular displacement of adjacent links in the chain; between the middle increased diameters there engage the teeth of a drive sprocket; the limiting members prevent the chain from becoming deflected in the direction of its remote side from the drive sprocket past a position of substantially straight alignment of the links and take up the bending couples on the chain on application of a push force to a fixture leaf.

Abstract: A rigid drive assembly for a telescoping mast is comprised of a pair of flexible link chains disposed at right angles to one another with respect to the pivot axes of the chain links and provided with interengaging latching elements which rigidly interconnect the two chains for movement along a linear path to extend and retract the mast. The two chains are spaced apart, and the latching elements interengage in the space between the two chains and include a plurality of latching plates on one of the chains extending transversely of the path and having openings therethrough in the direction of the path, and a pair of driving latch members for each latch plate engaging opposite sides of the latch plate and having a finger extending into the opening thereof.

Abstract: A chain 32 and sprocket 10 combination which reduces chordal action and wear allowing for higher output and greater durability of the devices that use chains and sprockets. The chain 32 has hinged joints equipped with a torsional spring 42 that resist hinging and thus reduces chordal action. The sprocket 10 has cam manipulated teeth 12 that prevent both sprocket tooth and chain wear.

Abstract: A telescoping mast assembly includes a plurality of interconnected mast sections nested within each other for movement between a fully retracted height and a fully extended height. A novel, rigid drive assembly, disposed within the interconnected mast sections, telescopes the mast sections to any position between the fully retracted and the fully extended heights. The rigid drive assembly is constructed of two interconnected, flexible chain elements which accurately position the interconnected mast sections.

Abstract: A chain magazine for shop machines, especially for apparatus for handling workpieces, including at least one endless rotating chain, preferably a roller chain, that is guided over sprocket wheels. Holders, for accommodating tools, workpieces, or the like, are mounted on the chains via connectors that are provided on at least two places of attachment, preferably pins, of chain links of the chains. Each connector, in a portion thereof that is disposed beyond the sprocket wheels, is provided with at least one support part via which the connector is supported against at least an adjacent chain link of the chains.

Abstract: A sprocket nose guide bar for guiding an endless saw chain. A configured sprocket is rotatably mounted in the nose of the bar and functions to elevate and transport the saw chain around the nose end. The teeth of the sprocket engage the drive links of the chain to lift the chain off the nose edge as the chain traverses the nose. The tooth tips project above the side link bearing surfaces and into configured notches whereby the teeth effectively provide the lifting action without entering the saw chain chassis.

Abstract: A variable diameter pulley having a plurality of belt support members arranged in a circular pattern between a pair of side members. Each side member consists of a pair of adjacent disk members rotatable relative to each other. The disk members have crossing guideways which control the radial position of the belt support members as a function of the rotational orientation between them. Extendible elements are disposed between adjacent belt support members to provide the variable diameter pulley with a generally cylindrical belt engagement surface.

Abstract: In a chain wheel with pockets (3) for locating horizontal links (4) of a round steel chain, teeth (2) are used, adjoining the rounded tooth-root sections (6) of which are inclined surfaces (7) which serve to support horizontal links (4) of chains, the picth of which is larger than the pitch of the chain wheel. A conventional support of the horizontal links on flat bottoms (8) of the pockets (3) is deliberately omitted.

Abstract: A chain and sprocket drive in which the chain is constructed of sets of connected links, the links in all sets being constructed to drivingly contact the sprocket teeth with inside flanks only, the links in some sets of links being of a shape which differs from the links in other sets of links.

Abstract: A chain sprocket wheel (also known as a load sheave) 10 for a hoist is generally in the shape of an isosceles triangle in side view with arcuate crests 12 forming teeth. Each side 14 of the sprocket wheel has formed therein a pocket 16 which has one semi-circular end wall 18 at one end but has its rear end open so that the pocket 16 is not complete.The pocket 16 are joined by "vertical" grooves 22 which passing through the teeth 12. The sprocket wheel 10 is used with a load chain having horizontal links 24a which are received in the pockets 16 and "vertical" links 22b which are received in the grooves 22.

Abstract: A universal or ball pivot-link chain is guided in two substantially tubular-shaped guide channels and is deflected or turned between such guide channels by means of a driven chain or sprocket wheel. At its circumference the chain wheel possesses a profiled structure formed by recesses or depressions which substantially correspond to the profile or outer contour of the universal link chain. The guide channels extend to the circumference of the chain wheel and form in conjunction therewith a respective transfer or transition region. At each such transfer region the chain wheel protrudes by an amount, essentially corresponding to the depth of the recesses, into the interior of the related guide channel. At such transfer or transition regions the chain links are guided both by the chain wheel and the guide channels. Consequently, there is ensured for a gentle and jerk-free transfer of the chain links from the chain or sprocket wheel to the guide channels and vice versa.

Abstract: A sprocket wheel has a plurality of equi-spaced circumferential teeth, and a plurality of pockets positioned between the teeth. A central circumferential groove in the sprocket wheel divides each of the teeth into two parts. Each of the pockets is shaped to engage with a link of a drive chain, each of the pockets being formed partially by flanks provided on each of the two parts of each of the pair of adjacent teeth defining that pocket. The flanks constitute chain link bearing faces, and each of the flanks has at least three separate bearing surfaces.

Abstract: A sprocket wheel has a plurality of equi-spaced circumferential teeth, each pair of adjacent teeth defining therebetween a pocket. The pockets are shaped to engage with the links of a drive chain. The teeth are formed with flanks at their edge faces which lead and trail during rotation of the sprocket wheel. The flanks merge with rounded faces which define bases of the teeth. The teeth are asymmetrically shaped in such a manner that the rounded faces associated with leading flanks each have a radius of curvature which is greater than the radius of curvature of each of the rounded faces associated with trailing flanks.

Abstract: An improved drive sprocket for driving a chain is set forth. The drive sprocket contains a plurality of peripheral drive teeth having a leading drive surface thereon. The sprocket has a first pair of teeth spaced a predetermined circumferential distance from each other on a pitch circle about the sprocket and a third tooth being spaced a distance less than the above mentioned predetermined distance from the trailing tooth of the first pair of teeth. The leading drive surface of each tooth engages and drives the chain around the sprocket.

Abstract: A drive sprocket wheel of the type having drive chain link receiving pockets formed between the sprocket teeth and a circumferential groove dividing each tooth into a pair of tooth sections with the outer tips at the flanks or sides thereof being cupped for the reception of the horizontal chain links, is improved by sloping the cupped outer tips toward the running direction of the chain. In the sloping direction, the outer portions of the flanks may be flat and are followed by concave surfaces. The sloping flanks of each pair of toothed sections establish theoretical points of contact with the rounded horizontal chain links during the drive operation, such points lying about midway between opposite sides of the sloping flanks.

Abstract: An endless standard link chain closed with a quarter- or half-turn twist to increase the contact length by a factor of four or two, respectively, and thus extend its life when used on power drives utilizing sprockets capable of engaging standard link chains.

Abstract: A driving device for a mining machine comprising an endless link chain exded on a drive wheel, a reversible wheel and a plurality of directing wheels and co-operating with a rack fixed alongside the conveyor. The directing wheels are each composed of two toothed rings separated by a circumferential groove. The outline of the teeth of the wheels is formed of sections of the sides of a regular polygon circumscribed on a circle, the tips of the teeth being truncated. In the intertooth spaces the wheel is provided with recesses below the pitch circle. The links of the chain lying in a plane parallel to the axis of the wheel seat on the flanks of two neighboring teeth, whereas the links lying in a plane perpendicular to the axis are seated in the circumferential groove. The reversible wheel has a shape identical to that of the directing wheels.