Having Belt-engaging Surfaces On Discrete Circumferentially Spaced, Relatively Movable Or Replaceable Members Patents (Class 474/162)
  • Patent number: 10144461
    Abstract: 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: Grant
    Filed: January 10, 2017
    Date of Patent: December 4, 2018
    Assignee: TEREX GLOBAL GMBH
    Inventors: Alfons Weckbecker, Werner Rutz
  • Patent number: 10113632
    Abstract: 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: Grant
    Filed: August 5, 2016
    Date of Patent: October 30, 2018
    Inventor: Shih-Ming Lo
  • Patent number: 10001203
    Abstract: 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: Grant
    Filed: September 19, 2016
    Date of Patent: June 19, 2018
    Assignee: Vaughan Industries Inc.
    Inventors: Andrew Vaughan Balash, Jon Bertolet
  • Patent number: 9862546
    Abstract: 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: Grant
    Filed: April 30, 2013
    Date of Patent: January 9, 2018
    Inventors: Dietrich Braun, Eberhard Braun
  • Patent number: 9777821
    Abstract: 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: Grant
    Filed: November 12, 2015
    Date of Patent: October 3, 2017
    Assignee: Vaughan Industries Inc.
    Inventor: Andrew Vaughan Balash
  • Patent number: 9227297
    Abstract: 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: Grant
    Filed: March 19, 2014
    Date of Patent: January 5, 2016
    Assignee: 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
  • Patent number: 9194476
    Abstract: 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: Grant
    Filed: September 19, 2012
    Date of Patent: November 24, 2015
    Assignee: Vaughan Industries, Inc.
    Inventor: Andrew Vaughan Balash
  • Publication number: 20150126316
    Abstract: 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: Application
    Filed: January 15, 2015
    Publication date: May 7, 2015
    Inventor: Armin Sebastian Tay
  • Patent number: 8904844
    Abstract: 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: Grant
    Filed: February 9, 2010
    Date of Patent: December 9, 2014
    Assignee: Komatsu Ltd.
    Inventors: Fumiaki Kawahara, Tao Wang, Shohei Kusada
  • Patent number: 8721480
    Abstract: 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: Grant
    Filed: February 20, 2008
    Date of Patent: May 13, 2014
    Assignee: Look Cycle International
    Inventor: Julien Bouchez
  • Publication number: 20140080645
    Abstract: 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: Application
    Filed: September 19, 2012
    Publication date: March 20, 2014
    Applicant: VAUGHAN INDUSTRIES INC.
    Inventor: Andrew Vaughan Balash
  • Publication number: 20110306453
    Abstract: 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: Application
    Filed: February 9, 2010
    Publication date: December 15, 2011
    Applicant: KOMATSU LTD.
    Inventors: Fumiaki Kawahara, Tao Wang, Shohei Kusada
  • Publication number: 20110300978
    Abstract: 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: Application
    Filed: May 27, 2011
    Publication date: December 8, 2011
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventor: Hiroshi SAKAMOTO
  • Patent number: 8066601
    Abstract: 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: Grant
    Filed: November 11, 2009
    Date of Patent: November 29, 2011
    Assignee: Tsubakimoto Chain Co.
    Inventors: Yoshikazu Nakano, Shunji Sakura, Kohei Kunimatsu
  • Patent number: 8062158
    Abstract: 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: Grant
    Filed: December 4, 2008
    Date of Patent: November 22, 2011
    Assignee: Tsubakimoto Chain Co.
    Inventors: Yoshikazu Nakano, Shunji Sakura, Kohei Kunimatsu
  • Patent number: 7947149
    Abstract: 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: Grant
    Filed: January 21, 2008
    Date of Patent: May 24, 2011
    Assignee: United Solar Ovonic LLC
    Inventors: Arthur Myatt, Gregory Demaggio, Kevin Beernink, Kermit Jones, Kenneth Lord
  • Patent number: 7883437
    Abstract: 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: Grant
    Filed: December 3, 2007
    Date of Patent: February 8, 2011
    Assignee: SRAM Deutschland GmbH
    Inventor: Henrik Braedt
  • Patent number: 7862460
    Abstract: 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: Grant
    Filed: January 22, 2007
    Date of Patent: January 4, 2011
    Assignee: BorgWarner Inc.
    Inventors: Jason W. Chekansky, George L. Markley
  • Publication number: 20100081532
    Abstract: 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: Application
    Filed: September 18, 2009
    Publication date: April 1, 2010
    Applicant: Excel Foundry and Machine, Inc.
    Inventors: Michael V. McCafferty, John Whitelock, Scott Kreger, Troy Miller
  • Publication number: 20090029815
    Abstract: 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: Application
    Filed: June 26, 2006
    Publication date: January 29, 2009
    Inventor: Kjetil Molnes
  • Patent number: 7481729
    Abstract: 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: Grant
    Filed: August 25, 2003
    Date of Patent: January 27, 2009
    Assignee: Supersprox, a.s.
    Inventor: Tomás Andel
  • Publication number: 20080193072
    Abstract: 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: Application
    Filed: February 5, 2008
    Publication date: August 14, 2008
    Inventors: Junichi Hattori, Michio Hori
  • Patent number: 7052424
    Abstract: 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: Grant
    Filed: March 29, 2001
    Date of Patent: May 30, 2006
    Assignee: Caterpillar Inc
    Inventors: Todd R. Kabrich, Morris E. Taft, Stephen C. Todd
  • Patent number: 6899651
    Abstract: 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: Grant
    Filed: September 17, 2002
    Date of Patent: May 31, 2005
    Assignee: Caterpillar Inc
    Inventor: Thomas E. Oertley
  • Patent number: 6893369
    Abstract: 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: Grant
    Filed: April 7, 2003
    Date of Patent: May 17, 2005
    Inventor: Richard D. Fuerle
  • Patent number: 6889642
    Abstract: 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: Grant
    Filed: June 14, 2002
    Date of Patent: May 10, 2005
    Assignee: Joh. Winklhofer & Sohne GmbH und Co. KG
    Inventors: Thomas Fink, Stefan Zimmermann, Peter Bachmair
  • Patent number: 6843540
    Abstract: 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: Grant
    Filed: December 13, 2002
    Date of Patent: January 18, 2005
    Assignee: Käessbohrer Geländefahrzeug AG
    Inventor: Helmut Kanzler
  • Patent number: 6826975
    Abstract: 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: Grant
    Filed: June 7, 2001
    Date of Patent: December 7, 2004
    Inventor: Luigi Reguzzi
  • Publication number: 20040198542
    Abstract: 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: Application
    Filed: April 7, 2003
    Publication date: October 7, 2004
    Inventor: Richard D. Fuerle
  • Publication number: 20040053722
    Abstract: 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: Application
    Filed: September 17, 2002
    Publication date: March 18, 2004
    Inventor: Thomas E. Oertley
  • Publication number: 20040029667
    Abstract: 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: Application
    Filed: June 5, 2003
    Publication date: February 12, 2004
    Inventors: Jean-Pierre Mercat, Bertrand Cauvin
  • Publication number: 20030166426
    Abstract: 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: Application
    Filed: April 2, 2003
    Publication date: September 4, 2003
    Inventor: Lawrence A. Anderson
  • Patent number: 6599210
    Abstract: 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: Grant
    Filed: August 16, 2001
    Date of Patent: July 29, 2003
    Assignees: Sunstar Giken Kabushiki Kaisha, Uni-Sunstar B.V.
    Inventors: Norihiko Takamori, Jichu Oh
  • Patent number: 6572500
    Abstract: 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: Grant
    Filed: May 18, 2001
    Date of Patent: June 3, 2003
    Assignee: Shimano Inc.
    Inventor: Toshio Tetsuka
  • Publication number: 20030083166
    Abstract: 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: Application
    Filed: May 10, 2000
    Publication date: May 1, 2003
    Applicant: Jeff A. Greene
    Inventor: Thomas E. Oertley
  • Patent number: 6540630
    Abstract: 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: Grant
    Filed: October 16, 2000
    Date of Patent: April 1, 2003
    Assignee: Caterpillar Inc.
    Inventor: Thomas E. Oertley
  • Patent number: 6431573
    Abstract: 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: Grant
    Filed: December 29, 2000
    Date of Patent: August 13, 2002
    Assignee: Massachusetts Institute of Technology
    Inventors: Victor S. Lerman, Harry H. Lerman, David M. Otten
  • Patent number: 6361461
    Abstract: 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: Grant
    Filed: March 29, 2000
    Date of Patent: March 26, 2002
    Inventor: Pavo Pusic
  • Publication number: 20020002092
    Abstract: 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: Application
    Filed: June 7, 2001
    Publication date: January 3, 2002
    Inventor: Luigi Reguzzi
  • Patent number: 5967924
    Abstract: 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: Grant
    Filed: October 23, 1997
    Date of Patent: October 19, 1999
    Assignee: LG Industrial Systems, Co., Ltd.
    Inventor: Yi Sug Kwon
  • Patent number: 5890814
    Abstract: 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: Grant
    Filed: September 3, 1997
    Date of Patent: April 6, 1999
    Assignee: GenTec, Inc.
    Inventor: Gary Catlett
  • Patent number: 5606801
    Abstract: 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: Grant
    Filed: June 9, 1995
    Date of Patent: March 4, 1997
    Assignee: Sandvik AB
    Inventor: Erik Sundstr om
  • Patent number: 5564996
    Abstract: 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: Grant
    Filed: June 9, 1995
    Date of Patent: October 15, 1996
    Assignee: Sandvik AB
    Inventor: Erik Sundstrom
  • Patent number: 5393271
    Abstract: 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: Grant
    Filed: February 2, 1994
    Date of Patent: February 28, 1995
    Inventor: Steven R. Sands
  • Patent number: 5380254
    Abstract: 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: Grant
    Filed: March 22, 1994
    Date of Patent: January 10, 1995
    Assignee: Caterpillar Inc.
    Inventors: Roy L. Maguire, H. Dale Vick, Billy G. Woodburn
  • Patent number: 5237234
    Abstract: 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: Grant
    Filed: October 13, 1988
    Date of Patent: August 17, 1993
    Assignee: AT&T Bell Laboratories
    Inventors: Robert W. Jebens, William H. Ninke, William S. N. Trimmer
  • Patent number: 5217414
    Abstract: 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: Grant
    Filed: December 18, 1991
    Date of Patent: June 8, 1993
    Assignee: Danieli & C. Officine Meccaniche SpA
    Inventor: Enzo Coccolo
  • Patent number: 5205794
    Abstract: 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: Grant
    Filed: November 14, 1983
    Date of Patent: April 27, 1993
    Assignee: Bicycle Partnership #1
    Inventor: Bruce W. Browning
  • Patent number: 5203861
    Abstract: A plastic sprocket wheel includes a sprocket body having a series of circularly spaced recesses located around a body circumferential edge, there also being a body side face opening in at least one body side face which communicates with the recess edge openings so that replaceable tooth elements can be slidably inserted into an associated recess when tooth replacement such as required when one or more teeth of an operating sprocket break or are rendered unusable. The replacement mounting requires no separate fastening devices for holding replacement teeth securely to the sprocket body, friction fit being sufficient to that end. The sprocket body is of resilient material such as an acetal, a polyethylene, a polypropylene etc., and the tooth elements can be of metal or the same material as the sprocket body, or such can be a combination of materials, e.g., a strong metal tooth piece molded in a resilient or plastic material core.
    Type: Grant
    Filed: December 18, 1991
    Date of Patent: April 20, 1993
    Inventors: Guy L. Irwin, Andre Robin
  • Patent number: 5192250
    Abstract: A bicycle multiple sprocket assembly comprises smaller and larger sprockets for shiftable engagement with a chain. The larger sprocket includes at least one reluctantly disengageable tooth, at least one chain supporting tooth immediately following the reluctantly disengageable tooth with respect to the forward rotational direction of the sprocket assembly, and at least one easily disengageable tooth immediately following the chain supporting teeth. The apex of the chain supporting tooth is wider than those of the other larger sprocket teeth for supporting thereon the chain at the time of shifting from the larger to smaller sprockets.
    Type: Grant
    Filed: March 9, 1992
    Date of Patent: March 9, 1993
    Assignee: Maeda Industries, Ltd.
    Inventor: Jun Kobayashi