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| Number | Title | Issue Date |
| 7740555 | Sprocket tooth profile for a roller or bush chain An improved sprocket profile for engaging a roller or bush chain smoothly and preventing radial impact with the root of the tooth during engagement. Contact between the sprocket teeth and the roller chain is altered by providing teeth with a root radius equivalent t... | 06/22/2010 |
| 7691020 | Chain transmission device In a roller or bushing chain transmission a standard roller or bushing chain having a uniform chain pitch meshes with a sprocket having at least two different tooth form pitches. ... | 04/06/2010 |
| 7635314 | Chain transmission In a chain transmission in which a roller chain transmits power from a driving sprocket to one or more driven sprockets, the sprocket teeth are shaped so that at a location radially outward from the sprocket pitch circle, the distance between the front surface of ea... | 12/22/2009 |
| 7442139 | Conveyance system 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 outw... | 10/28/2008 |
| 7294078 | Over-molded beaded cable for driving applications An over-molded beaded driving cable which has an inner core, a plurality of inner core structures. An outer jacket may encompass the inner core and inner core structures. Each of a plurality of outer beads concentrically surrounds an inner core structure. The outer ... | 11/13/2007 |
| 7258638 | Sprocket of a chain transmission for a bicycle A sprocket of a chain transmission for a bicycle is described, intended to be coupled with a further sprocket with a smaller diameter in a group of sprockets integral in rotation. The sprocket comprises a plurality of teeth which follow each other on the sprocket se... | 08/21/2007 |
| 7244206 | Roller chain transmission device 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 ... | 07/17/2007 |
| 7232392 | Cushion ring sprocket assembly and method A method for installing a cushion ring on a sprocket body to construct a sprocket assembly includes applying a deforming force to a cushion ring so that an opening therein is deformed to a shape that accommodate passage of a non-circular flange of a sprocket body th... | 06/19/2007 |
| 7201687 | Power transmission chain with ceramic joint components Power transmission chains (10, 40, 60) which are suitable for automotive uses as well as other uses and which have a reduced susceptibility to wear and corrosion, in which such chains (10, 40, 60) are constructed to include a plurality of sets (12, ... | 04/10/2007 |
| 7125356 | Tension-reducing random sprocket A sprocket is provided having a plurality of teeth around its circumference. Adjacent teeth are separated by roots each having a root radius defined as the distance between the center of the sprocket and a point along the root closest to the sprocket center in a rad... | 10/24/2006 |
| 7108622 | Roller chain transmission device 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 fir... | 09/19/2006 |
| 7097580 | Sprocket for a silent chain and method of manufacturing the same A sprocket for preventing the partial wear on the teeth of the sprocket. The teeth of the sprocket comprised of a pair of side portions located on opposite sides of a tooth and a central portion located between the pair of sides. The pair of side portions has a hard... | 08/29/2006 |
| 7077774 | Roller chain transmission device 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 th... | 07/18/2006 |
| 7074147 | Roller chain sprocket with symmetric cushion rings A sprocket includes a hub and a plurality of teeth projecting radially outwardly from the hub. At least one cushion ring is located adjacent the teeth, and the cushion ring defines a plurality of compression pads separated from each other by transverse grooves. Each... | 07/11/2006 |
| 7048665 | Power transmission chain having links with lateral spacing elements 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 row... | 05/23/2006 |
| 7048666 | Silent chain power transmitting apparatus A silent chain power transmitting apparatus has an endless link chain having a plurality of link plates (11A,11B,11C, . . . ) connected together, and sprocket wheels (20). Each of an inside flank (13) and an outside flank (14 | 05/23/2006 |
| 7032983 | Silent and reduced vibration chainwheel A silent and reduced vibration chainwheel includes a disk, multiple teeth and an energy absorber. The disk has an outer edge, two opposite sides and at least one recess. The teeth are formed radially at and extend out from the outer edge of the disk. The energy abso... | 04/25/2006 |
| 6958026 | Sprocket tooth profile An improved tooth profile for a roller chain sprocket enables noise reduction from impact and polygonal action during the meshing process. The profile of the engaging flank consists of three portions which are the seating, impact and distal portions all three of whi... | 10/25/2005 |
| 6923741 | Top sprocket for a rear sprocket assembly and rear sprocket assembly for a bicycle A rear sprocket assembly has a plurality of sprockets with the smallest sprocket being a top or first sprocket. At least one of the teeth is a down shift tooth that has a recessed side surface to assist in shifting the chain to the next larger sprocket. Preferably, ... | 08/02/2005 |
| 6910980 | Cushion ring sprocket assembly and method A method for installing a cushion ring on a sprocket body to construct a sprocket assembly includes applying a deforming force to a cushion ring so that an opening therein is deformed to a shape that accommodate passage of a non-circular flange of a sprocket body th... | 06/28/2005 |
| 6761657 | Roller chain sprocket with added chordal pitch reduction A sprocket is defined to include added chordal pitch reduction when in a new or “as-manufactured” condition. The sprocket chordal pitch Ps′ is purposefully reduced as compared to the as-built chain pitch Pc (or a theoretical maximum sproc... | 07/13/2004 |
| 6656072 | Chain transmission assembly Projections colliding with constricted portions at the center of hourglass-shaped pin link plates and with constricted portions at the center of hourglass-shaped roller link plates are provided at an annular resilient body. When a roller chain starts to m... | 12/02/2003 |
| 6652402 | Chain drive A chain drive comprises a chain having a plurality of articulating chain links and a toothed sprocket. The sprocket and the chain links have bearing surfaces that contact one another during meshing of the chain. The surfaces are disposed along the length ... | 11/25/2003 |
| 6575861 | Sprocket and chain for limiting chordal fall motion A sprocket for engaging a power transmission chain and for limiting motion of the chain along the radial direction of the sprocket is disclosed. The sprocket supports the chain at the sprocket teeth to limit chain motion in the radial direction of the spr... | 06/10/2003 |
| 6533107 | Silent chain power transmitting apparatus A silent chain power transmitting apparatus includes a silent chain and two or more sprockets with different number of teeth, wherein the sprockets each have a tooth form formed by hobbing with a hob cutter having teeth profiled similarly with the profile... | 03/18/2003 |
| 6500084 | Sprocket system for inverted tooth chain The chain and sprocket design of the present invention is applicable to sprockets (9) which have an even number of teeth and chains which use inward-pointing teeth and parallel links (2) and outer guides (8). The sprocket is designed such that alternate t... | 12/31/2002 |
| 6485115 | Drive sprocket which has lubricated pre-assembled cartridge assembly attached thereto The cartridge assembly being lubricated and includes a bushing rotatably mounted on a pin with a passageway to receive lubrication oil in the pin. The end portion of the pin includes first and second collars having a groove to receive a sealing arrangemen... | 11/26/2002 |
| 6443795 | Transmission chain for toys 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 ... | 09/03/2002 |
| 6375589 | Roller chain sprocket An improved chain drive mechanism having a closed loop of roller chain passing round the opposite sprocket wheels. The profile of each tooth formed on the circumference of the sprocket wheel is in conformity with the envelope curve traced by a roller when... | 04/23/2002 |
| 6371874 | Sprocket equipped with cushion body A sprocket has a central through-hole for attachment of the sprocket to a rotating shaft, a boss coaxial with the through-hole, and teeth on the periphery of the sprocket. The boss has a cylindrical outer surface coaxial with the through-hole and having s... | 04/16/2002 |
| 6371875 | Random engagement roller chain sprocket with cushion rings and root relief for improved noise characteristics A roller chain sprocket includes a number of sprocket teeth each having an engaging flank and a disengaging flank. An engaging flank of a first tooth of the sprocket cooperates with a disengaging flank of a second tooth to define a tooth space having a ro... | 04/16/2002 |
| 6325734 | Random engagement roller chain sprocket with staged meshing and flank relief to provide improved noise characteristics 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 first plurality of spro... | 12/04/2001 |
| 6322473 | Drive sprocket which has rotating members which are engaged by drive lugs of a track A drive mechanism includes a drive shaft and a sprocket drive assembly. The sprocket drive assembly includes a hub mechanically coupled to the drive shaft, a first side support secured to the hub, a second side support secured to the hub, and a plurality ... | 11/27/2001 |
| 6322472 | Positioning device 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 flexib... | 11/27/2001 |
| 6277045 | Thin profile cam sprocket with integrated timing target In an internal combustion engine, a shaft driving apparatus and timing assembly in the form of a camshaft sprocket having first and second ends extending perpendicular to the axis of rotation. The first end for defining an annular timing surface positione... | 08/21/2001 |
| 6244983 | Silent chain with inner flank engagement links and sprocket having teeth with matching surfaces 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 ... | 06/12/2001 |
| 6220970 | Virbration absorption assembly A vibration absorption assembly 12 and method for making the same having a base portion 30 which is movably connected to an intermediate portion 32 and to a top portion or cover 32. Assembly 12 contains several apertures or cavities 26 which operatively c... | 04/24/2001 |
| 6213905 | Roller chain sprockets oriented to minimize strand length variation The present invention is directed to a roller chain and sprocket drive which has at least two sprockets with varied radial seating positions. The relative orientation of the sprockets are adjusted to provide favorable dynamics to the drive. This can inclu... | 04/10/2001 |
| 6203462 | Sprocket A sprocket 1 includes a wavy region 2. The wavy region is formed at least at the outer periphery of the sprocket and extends in an undulating fashion along the circumference of the sprocket. The wavy region has a plurality of convex joint portions 3. A pl... | 03/20/2001 |
| 6179741 | Random engagement roller chain sprocket with cushion rings and root relief for improved noise characteristics A roller chain sprocket includes a number of sprocket teeth each having an engaging flank and a disengaging flank. An engaging flank of a first tooth of the sprocket cooperates with a disengaging flank of a second tooth to define a tooth space having a ro... | 01/30/2001 |
