Having Belt-engaging Surfaces On Discrete Circumferentially Spaced, Relatively Movable Or Replaceable Members Patents (Class 474/162)
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Patent number: 11794830Abstract: A sprocket segment includes a body with an attachment web including a first circumferential end and a second circumferential end. A sprocket region extends radially outwardly from the attachment web, including a plurality of lugs. The first circumferential end includes a dovetail recess including a first side flat surface extending circumferentially and radially from the first circumferential end, a second side flat surface extending circumferentially and radially from the first circumferential end, and an arcuate bottom surface extending radially between the first side flat surface and the second side flat surface.Type: GrantFiled: January 22, 2021Date of Patent: October 24, 2023Assignee: Caterpillar Inc.Inventors: Lewis C. Hunt, Donald John Kalmes, David J. Hakes
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Patent number: 11059541Abstract: A bicycle hub assembly comprises a sprocket support body. The sprocket support body includes at least ten external spline teeth configured to engage with a bicycle rear sprocket assembly. Each of the at least ten external spline teeth has an external-spline driving surface and an external-spline non-driving surface.Type: GrantFiled: May 30, 2017Date of Patent: July 13, 2021Assignee: SHIMANO INC.Inventors: Hiroshi Fujita, Kazuki Koshiyama, Takashi Nakanishi
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Patent number: 10144461Abstract: A sprocket for a crawler undercarriage comprises a plurality of sprocket teeth for engagement with a crawler track, wherein the sprocket teeth are arranged in a plurality of similar circumferential segments along the sprocket, and wherein an odd number of circumferential segments is provided.Type: GrantFiled: January 10, 2017Date of Patent: December 4, 2018Assignee: TEREX GLOBAL GMBHInventors: Alfons Weckbecker, Werner Rutz
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Patent number: 10113632Abstract: A bicycle sprocket wheel unit includes multiple section units connected to each other. Each section unit has teeth formed on the outer periphery thereof. Each section unit has at least one fixing device that is connected to a mounting unit. The mounting unit is made by way of pressing to form an integral ring plate which includes a hub connection hole defined in the center thereof. A first disk, a second disk and a third disk are connected to the mounting unit and share the center of the hub connection hole. A first sprocket wheel and a second sprocket wheel are respectively located on two sides of the third disk. The second disk is connected to a third sprocket wheel and a fourth sprocket wheel. The third disk is riveted to the first and second sprocket wheels along the whole face thereof to reinforce lateral strength of the sprocket wheels.Type: GrantFiled: August 5, 2016Date of Patent: October 30, 2018Inventor: Shih-Ming Lo
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Patent number: 10001203Abstract: A sprocket assembly is provided. The assembly includes a sprocket frame having a central body and a first ledge portion body. The first ledge portion has a first aperture extending therethrough. The assembly further includes a first removable tooth having a first tip portion, first and second landing portions, and a first extension portion. The first tip portion has first and second ends. The first extension portion extends from the second end and has an aperture extending therethrough. The assembly further includes a first screw extending through the first aperture in the first ledge portion and the aperture in the first extension portion to removably couple the first extension portion to the first ledge portion.Type: GrantFiled: September 19, 2016Date of Patent: June 19, 2018Assignee: Vaughan Industries Inc.Inventors: Andrew Vaughan Balash, Jon Bertolet
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Patent number: 9862546Abstract: A chain drive for a link chain of mining conveyors or mining extraction machines, in particular for scraper chain conveyors, includes a drive shaft. The drive power or the drive torque is introduced into the link chain by chain tooth elements. The chain tooth elements are set directly in the drive shaft in seats. For that purpose, the chain tooth elements have a lower coupling portion for interlocking engagement in the seats in the drive shaft. Accordingly, a separate chain wheel is unnecessary.Type: GrantFiled: April 30, 2013Date of Patent: January 9, 2018Inventors: Dietrich Braun, Eberhard Braun
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Patent number: 9777821Abstract: A sprocket assembly is provided. The assembly includes a sprocket frame having a central body and a first ledge portion body. The first ledge portion has a first aperture extending therethrough. The assembly further includes a first removable tooth having a first tip portion, first and second landing portions, and a first extension portion. The first tip portion has first and second sides and first and second ends. The first extension portion extends from the second end and has an aperture extending therethrough. The assembly further includes a first bolt extending through the first aperture in the first ledge portion and the aperture in the first extension portion to removably couple the first extension portion to the first ledge portion.Type: GrantFiled: November 12, 2015Date of Patent: October 3, 2017Assignee: Vaughan Industries Inc.Inventor: Andrew Vaughan Balash
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Patent number: 9227297Abstract: A retaining ring includes a generally annular upper portion having a top surface configured to be connected to a base of a carrier head and a lower surface, and a plurality of substantially identical arcuate segments detachably secured to the upper portion to form an annular lower portion. Each of the arcuate segments has an upper surface that abuts the lower surface of the upper portion and a bottom surface for contacting a polishing pad during polishing.Type: GrantFiled: March 19, 2014Date of Patent: January 5, 2016Assignee: Applied Materials, Inc.Inventors: Irfanulla Khuddus Rahmathullah, Bopanna Ichettira Vansantha, Padma Gopalakrishnan, Abraham Palaty, Aswathnarayanaiah Ravi, Ashish Bhatnagar, Young J. Paik, Stacy Meyer, Daniel Martin
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Patent number: 9194476Abstract: A sprocket assembly is provided. The assembly includes a sprocket frame having a central body and a first ledge portion body. The first ledge portion has a first aperture extending therethrough. The assembly further includes a first removable tooth having a first tip portion, first and second landing portions, and a first extension portion. The first tip portion has first and second sides and first and second ends. The first extension portion extends from the second end and has an aperture extending therethrough. The assembly further includes a first bolt extending through the first aperture in the first ledge portion and the aperture in the first extension portion to removably couple the first extension portion to the first ledge portion.Type: GrantFiled: September 19, 2012Date of Patent: November 24, 2015Assignee: Vaughan Industries, Inc.Inventor: Andrew Vaughan Balash
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Publication number: 20150126316Abstract: Methods and devices for improving the performance of CVT's (Continuous Variable Transmissions) that utilize a cone with one torque transmitting member, a cone with two opposite torque transmitting members, cone with one tooth (single tooth cone), and a cone with two opposite teeth. Said methods and devices include but are not limited to: a “cone with two opposite slide-able teeth” (see FIGS. 70-74).Type: ApplicationFiled: January 15, 2015Publication date: May 7, 2015Inventor: Armin Sebastian Tay
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Patent number: 8904844Abstract: A method of manufacturing a sprocket segment that is formed by forging as one of a plurality of circumferentially divided parts of a sprocket having a plurality of teeth arranged on an outer peripheral surface of a circular flange, the method includes: forming a material of the sprocket segment into an initial formed state in an initial forming step; and subjecting the sprocket segment in dies to a finish forming process with a tooth trace direction of the sprocket segment as viewed in cross-section of the sprocket segment being inclined relative to a forging direction of the dies in a finish forming step.Type: GrantFiled: February 9, 2010Date of Patent: December 9, 2014Assignee: Komatsu Ltd.Inventors: Fumiaki Kawahara, Tao Wang, Shohei Kusada
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Patent number: 8721480Abstract: The bicycle crankset includes a bottom bracket axle, two cranks and a chainring carrier bearing first and second different toothed chainrings. The chainring carrier has the shape of a star, of which each arm is provided with a mounting hole aligned with a mounting hole in the first and second chainrings respectively. These holes accommodate elements for fastening chainrings to the chainring carrier, and they are arranged on a first circle with a predetermined diameter. Each arm of the chainring carrier is provided with a second mounting hole arranged on a second circle with a diameter that has been reduced relative to the first circle to match the chainring carrier to two other toothed circular chainrings with a size that is respectively reduced relative to the first and second chainrings and of which the mounting holes are located on the second circle.Type: GrantFiled: February 20, 2008Date of Patent: May 13, 2014Assignee: Look Cycle InternationalInventor: Julien Bouchez
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Publication number: 20140080645Abstract: A sprocket assembly is provided. The assembly includes a sprocket frame having a central body and a first ledge portion body. The first ledge portion has a first aperture extending therethrough. The assembly further includes a first removable tooth having a first tip portion, first and second landing portions, and a first extension portion. The first tip portion has first and second sides and first and second ends. The first extension portion extends from the second end and has an aperture extending therethrough. The assembly further includes a first bolt extending through the first aperture in the first ledge portion and the aperture in the first extension portion to removably couple the first extension portion to the first ledge portion.Type: ApplicationFiled: September 19, 2012Publication date: March 20, 2014Applicant: VAUGHAN INDUSTRIES INC.Inventor: Andrew Vaughan Balash
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Publication number: 20110306453Abstract: A method of manufacturing a sprocket segment that is formed by forging as one of a plurality of circumferentially divided parts of a sprocket having a plurality of teeth arranged on an outer peripheral surface of a circular flange, the method includes: forming a material of the sprocket segment into an initial formed state in an initial forming step; and subjecting the sprocket segment in dies to a finish forming process with a tooth trace direction of the sprocket segment as viewed in cross-section of the sprocket segment being inclined relative to a forging direction of the dies in a finish forming step.Type: ApplicationFiled: February 9, 2010Publication date: December 15, 2011Applicant: KOMATSU LTD.Inventors: Fumiaki Kawahara, Tao Wang, Shohei Kusada
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Publication number: 20110300978Abstract: There is provided a timing pulley whose noise is low, which is light-weight, whose pulley structure is simple and which excels in workability. The timing pulley comprises a cylindrical timing hub which is fitted around a power transmitting shaft, a pair of flange members provided apart on both end portions of the timing hub and a plurality of engagement pins disposed on peripheral edge portions of the pair of flange members in the circumferential direction thereof so as to extend between and through each of the flange members and so as to engage with mating teeth of a timing belt.Type: ApplicationFiled: May 27, 2011Publication date: December 8, 2011Applicant: TSUBAKIMOTO CHAIN CO.Inventor: Hiroshi SAKAMOTO
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Patent number: 8066601Abstract: In a timing chain driving system in which the speed of a driving sprocket fluctuates cyclically, the tooth pitch of a driven sprocket from which a tension span of the chain travels toward the driving sprocket varies cyclically around the circumference of the driven sprocket so that the tooth pitch at the point at which the timing chain disengages from the driven sprocket is at a minimum when the rotational speed of the driving sprocket is maximum, moderating fluctuations in chain tension. A similar effect can be achieved in the case of a driving sprocket having a cyclically varying tooth pitch by arranging the driving sprocket so that its tooth pitch is maximum at the point at which it is engaged by the chain when its rotational speed is maximum.Type: GrantFiled: November 11, 2009Date of Patent: November 29, 2011Assignee: Tsubakimoto Chain Co.Inventors: Yoshikazu Nakano, Shunji Sakura, Kohei Kunimatsu
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Patent number: 8062158Abstract: In a timing chain drive unit the tooth pitch of a driven sprocket from which a tension span of the chain travels toward a driving sprocket varies cyclically around the circumference of the driven sprocket and cyclically increases and decreases the length of the tension span in synchronism with load variations imparted to the driven sprocket by a valve-operating camshaft.Type: GrantFiled: December 4, 2008Date of Patent: November 22, 2011Assignee: Tsubakimoto Chain Co.Inventors: Yoshikazu Nakano, Shunji Sakura, Kohei Kunimatsu
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Patent number: 7947149Abstract: A web of a first sheet material and a web of a second sheet material are laminated together by a process wherein the sheet materials are wound, in an interleaved relationship, upon a roller having a radially displaceable outer surface. The roller and webs and then subjected to heating and/or a low-pressure environment so as to complete the lamination. A body of adhesive material, such as a hot melt adhesive, may be interposed between the webs and the heating or low pressure environment can activate this adhesive. Further disposed are particular configurations of rollers with radially displaceable surfaces.Type: GrantFiled: January 21, 2008Date of Patent: May 24, 2011Assignee: United Solar Ovonic LLCInventors: Arthur Myatt, Gregory Demaggio, Kevin Beernink, Kermit Jones, Kenneth Lord
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Patent number: 7883437Abstract: A sprocket for transferring a force between a chain and a drive element that includes a plurality of teeth and a plurality of openings proximate the teeth. Each tooth has a load-bearing flank and a non-load-bearing flank. One of the plurality of openings are arranged relative to one of the plurality of teeth, in one-to-one correspondence therebetween, such that the opening is asymmetrically divided by a radial centerline of the tooth, a first load strip is formed between the opening and the load-bearing flank of the tooth, and a second load strip is formed between the opening and the non-load-bearing flank of the tooth.Type: GrantFiled: December 3, 2007Date of Patent: February 8, 2011Assignee: SRAM Deutschland GmbHInventor: Henrik Braedt
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Patent number: 7862460Abstract: A sprocket (S) for a chain driven power transmission system used on an internal combustion engine. Severe ITVH (Noise, Vibration, Harshness) characteristics associated with a chain engaging the sprocket is damped by two annular rings (R1, R2) that are loosely positioned on either side of the circumferential row of teeth. The inner diameters (ID1, ID2) of each of the annular rings (R1, R2) form cavities between the annular rings and the sprocket grooves. Pressurized viscous fluid is supplied to each cavity via channels in the hub of the sprocket to cushion the impact of each roller of the chain as it engages each row of teeth during engine operation. The pressure of the viscous fluid creates a resistive force to minimize the severe impact noise experienced by non-damped sprockets.Type: GrantFiled: January 22, 2007Date of Patent: January 4, 2011Assignee: BorgWarner Inc.Inventors: Jason W. Chekansky, George L. Markley
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Publication number: 20100081532Abstract: A drive tumbler comprises a hub having attached thereto a plurality of replaceable rim segments. The rim segments are supported by a plurality of raised blocks that are formed integral with the hub and serve to absorb the shear forces to which the tumbler is subject during operation.Type: ApplicationFiled: September 18, 2009Publication date: April 1, 2010Applicant: Excel Foundry and Machine, Inc.Inventors: Michael V. McCafferty, John Whitelock, Scott Kreger, Troy Miller
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Publication number: 20090029815Abstract: A device is described for transport of chain lengths of varying link sizes, where the device comprises at least a first side plate for fastening on a shaft, and at least four catching arms arranged on the first side plate in a radial pattern, where each catching arm is arranged at an angle of about 90 degrees in relation to the next catching arm.Type: ApplicationFiled: June 26, 2006Publication date: January 29, 2009Inventor: Kjetil Molnes
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Patent number: 7481729Abstract: The present invention relates to lightweight sprocket, consisting of a central portion (1) made from light metal alloy, to which a peripheral toothed portion (2) made from ferrous alloy is joined, using rivets (3) for joining said portions (1,2), where said joining is created between radial beams (21) of the peripheral toothed portion (2) and pocket-like recess (13) in the central portion (1), radial beams (21) being overlapped across bottoms of pocket-like recesses (13), and where a thickness of radial beams(21), at least over the joining area, is decreased by 10 to 60%, in relation to full thickness of said toothed peripheral portion (2), and a thickness of a bottom of the pocket-like recess (13) in the central portion (1) is decreased by 20 to 70%, in relation to full thickness of the central portion (1) of the sprocket.Type: GrantFiled: August 25, 2003Date of Patent: January 27, 2009Assignee: Supersprox, a.s.Inventor: Tomás Andel
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Publication number: 20080193072Abstract: An angular contact ball bearing includes a plurality of balls disposed between raceways of inner and outer bearing rings. Each ball is in contact with at least one of the raceways at two points having different contact angles from each other and located on an opposite side of a bearing centerline from a point at which each ball is in contact with the other of the raceways. The bearing is a full complement bearing, wherein the balls are arranged in a full complement. With this arrangement, it is possible to minimize the contact stress at the two contact points where the radial load and the axial load in one direction are supported, thereby reducing elastic deformation at the two contact points. This makes it possible to further increase the rigidity of the bearing.Type: ApplicationFiled: February 5, 2008Publication date: August 14, 2008Inventors: Junichi Hattori, Michio Hori
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Patent number: 7052424Abstract: A drive sprocket assembly for driving an endless chain assembly for propelling a machine has a hub portion and flexible cantilever teeth in which each tooth is separately deflectable upon impact by a bushing of the endless chain assembly. The flexibility of each tooth will absorb a portion of the kinetic energy of the impact to reduce noise in the structure. The drive sprocket assembly includes a plurality of segments each having the cantilever teeth. Each segment has a first end portion and a second end portion having an end relief which prevents wear between the segment and the hub as the end portion is deflected by the impact.Type: GrantFiled: March 29, 2001Date of Patent: May 30, 2006Assignee: Caterpillar IncInventors: Todd R. Kabrich, Morris E. Taft, Stephen C. Todd
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Patent number: 6899651Abstract: A drive sprocket assembly includes a hub having an endless chain connected thereto. A plurality of driver members are mounted between the hub and the endless chain to provide sound suppression.Type: GrantFiled: September 17, 2002Date of Patent: May 31, 2005Assignee: Caterpillar IncInventor: Thomas E. Oertley
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Patent number: 6893369Abstract: A drive wheel for pulling a chain has a diameter that can be changed continuously as the drive wheel rotates. The drive wheel has a drive shaft and there are at least 2 chain-engaging means (teeth or blades) positioned around the drive shaft for engaging a chain. The wheel has a number of modules that support the chain-engaging means and permit the chain-engaging means to move slightly in a circumferential direction a distance sufficient to engage the chain. Module locks prevent such movement when the chain is engaged, but permit it when the chain is not engaged. Extenders connect the modules to the drive shaft and can change the distance between the modules and the drive shaft while the drive shaft is rotating. Extender locks prevent the extenders from changing that distance when the chain is engaged but permit such change when the chain is not engaged. A transmission can be made by connecting the drive wheel to a sprocket wheel with a chain.Type: GrantFiled: April 7, 2003Date of Patent: May 17, 2005Inventor: Richard D. Fuerle
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Patent number: 6889642Abstract: The present invention relates to a tensioning rail for a traction drive, especially for an internal combustion engine, said tensioning rail comprising a fastening end section with a pivotable fastening means and a tensioning arm area having, at a predetermined distance from said pivotable fastening means, a pressure-application region for contact with a tensioning piston of a tensioning device, at least one second pressure-application region being arranged on the tensioning arm area at a predetermined different distance from said pivotable fastening means.Type: GrantFiled: June 14, 2002Date of Patent: May 10, 2005Assignee: Joh. Winklhofer & Sohne GmbH und Co. KGInventors: Thomas Fink, Stefan Zimmermann, Peter Bachmair
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Patent number: 6843540Abstract: A spur wheel for the chain drive assembly of a tracked vehicle on which the guide elements of a chain roll during the operation of the chain drive assembly is provided. Certain parts of the spur teeth which come in contact with the rolling area of the guide elements are designed as removable, replaceable parts.Type: GrantFiled: December 13, 2002Date of Patent: January 18, 2005Assignee: Käessbohrer Geländefahrzeug AGInventor: Helmut Kanzler
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Patent number: 6826975Abstract: A gear wheel comprises a first gear wheel portion, including first half-teeth, which can be coupled to a second gear wheel portion, including second half-teeth, by adjustable coupling means, so that the first and second half-teeth form by pairs the teeth of the gear wheel. The second gear wheel portion can be turned with respect to the first gear wheel portion about the rotary axis of the gear wheel, and can be locked by the adjustable coupling, so as to change the distance of the first and second half-teeth in each pair.Type: GrantFiled: June 7, 2001Date of Patent: December 7, 2004Inventor: Luigi Reguzzi
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Publication number: 20040198542Abstract: A drive wheel for pulling a chain has a diameter that can be changed continuously as the drive wheel rotates. The drive wheel has a drive shaft and there are at least 2 chain-engaging means (teeth or blades) positioned around the drive shaft for engaging a chain. The wheel has a number of modules that support the chain-engaging means and permit the chain-engaging means to move slightly in a circumferential direction a distance sufficient to engage the chain. Module locks prevent such movement when the chain is engaged, but permit it when the chain is not engaged. Extenders connect the modules to the drive shaft and can change the distance between the modules and the drive shaft while the drive shaft is rotating. Extender locks prevent the extenders from changing that distance when the chain is engaged but permit such change when the chain is not engaged. A transmission can be made by connecting the drive wheel to a sprocket wheel with a chain.Type: ApplicationFiled: April 7, 2003Publication date: October 7, 2004Inventor: Richard D. Fuerle
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Publication number: 20040053722Abstract: A drive sprocket assembly includes a hub having an endless chain connected thereto. A plurality of driver members are mounted between the hub and the endless chain to provide sound suppression.Type: ApplicationFiled: September 17, 2002Publication date: March 18, 2004Inventor: Thomas E. Oertley
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Publication number: 20040029667Abstract: The invention relates to a driving sprocket for a bicycle crankset having a toothed ring whose ring is divided into a plurality of segments (14a, 14b, 14c, 14d), the segments being borne by a frame (16) that is rotationally movable about a crankset axle, each sprocket segment being movable between a low position and a high position, a system for transferring each segment to transfer said segment from one position to another, and an indexing mechanism to control the system for shifting the segments. The sprocket is characterized in that each segment (14a, 14b, 14c, 14d) is floatingly mounted with respect to the frame (16) and in that it is guided in its transfer movement along a trajectory having a radial component and a tangent component.Type: ApplicationFiled: June 5, 2003Publication date: February 12, 2004Inventors: Jean-Pierre Mercat, Bertrand Cauvin
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Publication number: 20030166426Abstract: An improvement relating to an infinitely variable ratio transmission having a pair of oppositely oriented variable diameter torque input and output pulleys is disclosed wherein the conical surfaces of the pulleys include a multiplicity of axially and circumferentially movable sprocket bars to accommodate the fixed length of an inextensible drive belt or chain wrapping about the pulleys.Type: ApplicationFiled: April 2, 2003Publication date: September 4, 2003Inventor: Lawrence A. Anderson
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Patent number: 6599210Abstract: A sprocket has a mounting part for mounting on a wheel and a corrugated section provided with teeth for engagement with a chain such that the sprocket has a reduces volume and weight and allows for appropriate engagement with the chain by having the position of the sprocket agree with the position of the chain. The mounting part has a first raised section raised toward a one plate surface side and a second raised section raised toward another plate surface side with respect to a longitudinally central plane extending through a center of the sprocket so as to divide the total volume and weight of the sprocket into substantially equal sections. A flat top part of the first raised section having a mounting hole is on a level with a bottommost end surface of the sprocket.Type: GrantFiled: August 16, 2001Date of Patent: July 29, 2003Assignees: Sunstar Giken Kabushiki Kaisha, Uni-Sunstar B.V.Inventors: Norihiko Takamori, Jichu Oh
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Patent number: 6572500Abstract: A sprocket assembly is provided for a bicycle having a large sprocket and a small sprocket. The large sprocket includes one or more chain support projections formed on the side surface opposed to the small sprocket. Each projection includes a contact portion defming a contact surface for contacting, without meshing, a lower end of a chain shifted from the small sprocket to the large sprocket. The projections are arranged on the large sprocket with a size and shape that allows the projections to pass between outer links prior to the gear-changing operation. The chain support projections are arranged for causing the contact surface to contact the chain engaging the small sprocket and pick up the chain radially outwardly of the large sprocket during a chain shift from the small sprocket to the large sprocket.Type: GrantFiled: May 18, 2001Date of Patent: June 3, 2003Assignee: Shimano Inc.Inventor: Toshio Tetsuka
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Publication number: 20030083166Abstract: A drive sprocket assembly for driving an endless chain assembly for propelling a vehicle has multilayered flexible teeth in which each layer is separately deflectable upon impact by a bushing of the endless chain assembly. The independent flexibility of each tooth in the multilayered structure is less than that of a single wide monolithic tooth and, as a result of expected variance due to acceptable manufacturing tolerances in tooth profiles and web shapes, the impacts of the track bushing do not occur simultaneously. The track bushing first engages one or more of the teeth in the multilayered tooth structure, whereupon the first impacted teeth absorb at least a portion of the kinetic energy prior to the bushing impacting the remaining teeth in the multilayered structure.Type: ApplicationFiled: May 10, 2000Publication date: May 1, 2003Applicant: Jeff A. GreeneInventor: Thomas E. Oertley
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Patent number: 6540630Abstract: A sprocket for supporting and propelling an endless track assembly of a track-type machine. The sprocket has an endless chain which is resiliently mounted to an outer flange of a hub. The chain has outwardly projecting teeth that interact with the endless track assembly to propel the machine. A plurality of drive assemblies are pressed between the endless chain and the flange to resiliently connect the endless chain to the flange of the hub.Type: GrantFiled: October 16, 2000Date of Patent: April 1, 2003Assignee: Caterpillar Inc.Inventor: Thomas E. Oertley
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Patent number: 6431573Abstract: A shifting mechanism for a bicycle or other wheeled cycle has at least two gear wheels, of which at least one is segmented. The segments are movable into and out of a driving position. Motion of the segments occurs at a circumferential location out of the driving zone, at a location where the driving band, typically a chain, is not contacting the segment. The shifting mechanism can be provided at the front chain ring, or at the rear, gear sprocket. For a front chain wheel, the free zone is generally the rearward half of the chain ring, while for the rear gear sprocket, the free zone is generally the forward half. The moving segments can be toothed gates which flip perpendicularly to the plane in which the chain resides. The gates may be actuated by a moving mechanism powered by an actuator, such as a D.C. motor, under control of a signal processor, such as a microprocessor.Type: GrantFiled: December 29, 2000Date of Patent: August 13, 2002Assignee: Massachusetts Institute of TechnologyInventors: Victor S. Lerman, Harry H. Lerman, David M. Otten
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Patent number: 6361461Abstract: A multiple-speed chain driving device includes a shaft, a rotors'assembly, a chain driving sprocket, and a shifting assembly. The rotors'assembly is mounted on the shaft and includes three rotors which are vertically mounted on each other and enclosed within the sprocket. The shifting assembly is also mounted on the shaft and located parallel with respect to the rotors' assembly. The device can be made in either 3-speed or 2-speed design and enables a few slightly different configurations for both designs. The device enables a smooth shifting process and allows only one sprocket to produce the full range of speeds presently obtained by a front sprocket assembly in a bicycle.Type: GrantFiled: March 29, 2000Date of Patent: March 26, 2002Inventor: Pavo Pusic
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Publication number: 20020002092Abstract: A gear wheel comprises a first gear wheel portion, including first half-teeth, which can be coupled to a second gear wheel portion, including second half-teeth, by adjustable coupling means, so that the first and second half-teeth form by pairs the teeth of the gear wheel. The second gear wheel portion can be turned with respect to the first gear wheel portion about the rotary axis of the gear wheel, and can be locked by the coupling adjustable means, so as to change the distance of the first and second half-teeth in each pair.Type: ApplicationFiled: June 7, 2001Publication date: January 3, 2002Inventor: Luigi Reguzzi
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Patent number: 5967924Abstract: In a sprocket buffer, in order to reduce a noise and a shake/vibration of the chain gearing mechanism, an elastic band is provided to be adhered in a bottom of the sprockets; a cylindric pin which is to be inserted into the coupling hole in the bottom of the sprockets is formed in a lower part of the elastic band, and a pressure portion having the same diameter as that of the coupling hole is formed integrally with the cylindrical pin at a lower portion of the outer peripheral surface of the pin, thereby improving a durability against a cut off of the pin head portion.Type: GrantFiled: October 23, 1997Date of Patent: October 19, 1999Assignee: LG Industrial Systems, Co., Ltd.Inventor: Yi Sug Kwon
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Patent number: 5890814Abstract: A rotatable drum arrangement, wherein the drum is mounted on support rings such that circumferential expansion and contraction of the drum relative to said support rings does not adversely affect the mounting. In a preferred embodiment, drum blocks are mounted to the drum, and corresponding ring blocks are mounted to the support ring. The side surfaces of adjacent drum blocks and ring blocks support the weight of the drum on the ring. In this arrangement, gaps may be maintained between the drum and support ring that allow for expansion and contraction of the drum. In the preferred embodiment, there is also a drive sprocket mounted on the drum with a sprocket mounting arrangement that also accommodates expansion and contraction of the drum.Type: GrantFiled: September 3, 1997Date of Patent: April 6, 1999Assignee: GenTec, Inc.Inventor: Gary Catlett
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Patent number: 5606801Abstract: A drive sprocket arrangement includes a drive sprocket and a drive ring rolling loosely on the outer periphery of the sprocket. Drive links of the saw chain enter recesses in the sprocket via orifices in the drive ring. The drive ring has at an axial inner edge thereof a radially inwardly directed flange to retain the ring on the sprocket, and at an axial outer edge thereof a radially outwardly directed flange to retain the chain in place. The flanges are arranged such that the axial inner edge will be disposed above the axial outer edge when the drive shaft of the chain saw points downwardly.Type: GrantFiled: June 9, 1995Date of Patent: March 4, 1997Assignee: Sandvik ABInventor: Erik Sundstr om
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Patent number: 5564996Abstract: Drive sprocket assembly for chain saws, where a saw chain runs around a loose drive ring that rolls upon cylindrical surfaces of a drive sprocket. Drive links of the saw chain project through holes of the drive ring and enter recesses of the drive sprocket to be driven thereby. The recesses of the drive sprocket have an axial dimension substantially larger than the thickness of the drive links, to enable the drive ring and chain to have substantial axial play relative to the drive sprocket.Type: GrantFiled: June 9, 1995Date of Patent: October 15, 1996Assignee: Sandvik ABInventor: Erik Sundstrom
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Patent number: 5393271Abstract: A mounting method for split sprockets which embodies radial slots in all mounting bolt positions; except the two mounting bolt positions disected by the split ends of the sprocket, the aforementioned radial slots extending from the center bore outward to; and including all, remaining mounting bolt positions which allows removal and replacement to be accomplished in a rotatable fashion, replacement being further facilitated by orientation openings adjacent to a common sprocket split line, one in each sprocket half.Type: GrantFiled: February 2, 1994Date of Patent: February 28, 1995Inventor: Steven R. Sands
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Patent number: 5380254Abstract: A finished toothed sprocket segment is forged in a cavity of a first die by a second die having a protrusion which extends into the cavity. The sprocket segment has first and second spaced datum pads formed on a first curved surface of a rim of the sprocket which locates the sprocket segment on a hub. The first and second datum pads and first and second apertures are located relative to each other so that distortion of the sprocket segment during final heat treatment does not effect the relative position. As a result the apertures in the hub and sprocket segment are easily aligned during attachment of the sprocket segment to the hub. Since the first die requires no draft angles, the critical surfaces on the sprocket segment are forged to final finish, flatness and tolerance.Type: GrantFiled: March 22, 1994Date of Patent: January 10, 1995Assignee: Caterpillar Inc.Inventors: Roy L. Maguire, H. Dale Vick, Billy G. Woodburn
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Patent number: 5237234Abstract: An electrostatic motor comprising a stator and a rotor, one of which is equipped with a plurality of lands to which a voltage is sequentially applied. The other of the stator and rotor is made of conductive material. Rolling contact is established between the stator and rotor along at least one line of contact. The rolling contact is controlled to repetitive first and second paths along first and second surfaces of the stator and rotor, respectively, in which the lengths of the first and second paths are different. Embodiments include a cylindrical motor, a flexible disk motor and a conical motor.Type: GrantFiled: October 13, 1988Date of Patent: August 17, 1993Assignee: AT&T Bell LaboratoriesInventors: Robert W. Jebens, William H. Ninke, William S. N. Trimmer
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Patent number: 5217414Abstract: Linear velocity corrective device for chains (11) driven by toothed wheels (14), advantageously toothed wheels (14) with few teeth, for closed looped chains (11) extending in a plane or subvertical, operating near the joining zone of said chain (11) with said toothed wheel (14) and comprising levelling means (16-26-28) for the levelling of the links (12) according to the tangent to the circumference created by the pitch diameter (DP) of said toothed wheel (14) and operating upstream of the vertical of the rotation axis (15) of said toothed wheel (14).Type: GrantFiled: December 18, 1991Date of Patent: June 8, 1993Assignee: Danieli & C. Officine Meccaniche SpAInventor: Enzo Coccolo
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Patent number: 5205794Abstract: A shift mechanism for a bicycle and the like wherein a chain is shifted from sprocket to sprocket by an operator controlling a lever to position a camming surface to direct a guide pawl to tilt a segment of one sprocket whereby the tilted segment aligns with a nontilted sprocket during chain shifting.Type: GrantFiled: November 14, 1983Date of Patent: April 27, 1993Assignee: Bicycle Partnership #1Inventor: Bruce W. Browning