Coaxial Surface Is Belt-engaging Surface On Positive Drive Pulley Of Different Circumference Patents (Class 474/160)
  • Patent number: 11305837
    Abstract: A bicycle rear sprocket assembly comprises at least one sprocket and an internal cavity. The at least one sprocket includes at least ten internal spline teeth configured to engage with a bicycle hub assembly. The at least ten internal spline teeth have an internal-spline major diameter. The internal cavity has a maximum outer diameter larger than the internal-spline major diameter.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: April 19, 2022
    Assignee: SHIMANO INC.
    Inventors: Atsushi Komatsu, Koji Yuasa, Takehiko Nakajima
  • Patent number: 11292555
    Abstract: A bicycle sprocket comprises a sprocket body, a plurality of sprocket teeth, a mounting member, at least one fastening member, and a cover member. The sprocket body has at least one first threaded portion. The mounting member has at least one fastening hole configured to be aligned with the at least one first threaded portion in the assembled state. The at least one fastening member has a fastening shaft portion, a fastening head portion, and a second threaded portion. The second threaded portion is configured to threadedly engage with the at least one first threaded portion of the sprocket body in the assembled state. The cover member is configured to at least cover the fastening shaft portion of the at least one fastening member when viewed from an axial direction with respect to the rotational center axis in the assembled state.
    Type: Grant
    Filed: August 1, 2018
    Date of Patent: April 5, 2022
    Assignee: SHIMANO INC.
    Inventors: Kenichi Akanishi, Atsuhiro Emura, Shingo Shiraishi
  • Patent number: 11199252
    Abstract: A mounting body and a cassette suitable for mounting on a bicycle rear wheel hub in combination with the body. The body has an inner radial portion for coupling with rear wheel hub and an outer radial portion for mounting the cassette and a portion with a plurality of attachment areas for attachment to a cassette. The cassette has an axial centering opening for centering on the mounting body and a plurality of cassette attachment areas that align with the mounting body attachment areas to unite the mounting body and cassette for transmission of pedaling torque.
    Type: Grant
    Filed: October 15, 2018
    Date of Patent: December 14, 2021
    Assignee: Campagnolo S.r.l.
    Inventor: Mirco Civiero
  • Patent number: 11192606
    Abstract: A bicycle multi-gear cassette mountable to a wheel hub driver mechanism that includes truncated conical shell having a first opening proximate a small shell base and a second opening proximate a large shell base. The openings are coaxial with an axis of the shell. A plurality of toothed sprockets having different numbers of teeth are disposed on the shell and extend radially of the central axis. A torque load transmitting profile is configured on the shell proximate one of the small and large shell bases. A radial load transmitting profile is configured on the shell proximate one of the small and large shell bases. The shell, sprockets, and the load transmitting profiles embody a single piece.
    Type: Grant
    Filed: February 26, 2020
    Date of Patent: December 7, 2021
    Assignee: SRAM, LLC
    Inventor: Henrik Braedt
  • Patent number: 11078987
    Abstract: A bicycle chain comprises a first inner link plate and a second inner link plate. The first inner link plate comprises a first inner-link end portion, a second inner-link end portion, and a first inner-link intermediate portion. The second inner link plate comprises a third inner-link end portion, a fourth inner-link end portion, and a second inner-link intermediate portion. A first inner-link end edge has a first chamfer extending about the first inner-link center axis such that a part of the first chamfer is disposed in a first circumferential area defined from a first inner-link longitudinal centerline to a first reference line when viewed in an axial direction of the first inner-link center axis. The first circumferential area is smaller than 14 degrees.
    Type: Grant
    Filed: August 8, 2017
    Date of Patent: August 3, 2021
    Assignee: SHIMANO INC.
    Inventors: Tsuyoshi Fukumori, Atsuhiro Emura
  • Patent number: 11028916
    Abstract: A bicycle sprocket includes a base body, a first sprocket tooth and a shifting initiation tooth. The first sprocket tooth includes a drive surface including a drive surface side tooth tip end portion, a non-drive surface including a non-drive surface side tooth tip end portion and a tooth tip portion connecting the drive surface side tooth tip end portion and the non-drive surface side tooth tip end portion. The non-drive surface extends circumferentially with respect to the rotational center axis from the non-drive surface side tooth tip end portion toward a first surface. The tooth tip portion extends circumferentially in a first direction between the drive surface side tooth tip end portion and the non-drive surface side tooth tip end portion. The non-drive surface extends circumferentially from the non-drive surface side tooth tip end portion in a second direction that is inclined with respect to the first direction.
    Type: Grant
    Filed: September 14, 2018
    Date of Patent: June 8, 2021
    Assignee: Shimano Inc.
    Inventors: Yasufumi Fukunaga, Tsuyoshi Fukumori
  • Patent number: 11015695
    Abstract: A sprocket assembly component with at least one first toothed wheel configured to have the most teeth of the sprocket assembly. The first toothed wheel has an axially inner surface and a supporting assembly that extends in the axial direction up to a free end arranged axially more internally with respect to the axially inner surface of the first toothed wheel.
    Type: Grant
    Filed: September 24, 2018
    Date of Patent: May 25, 2021
    Assignee: Campagnolo S.r.l.
    Inventor: Filippo Bisarello
  • Patent number: 10994803
    Abstract: A bicycle sprocket has a rotational center axis. The bicycle sprocket comprises a sprocket body and sprocket teeth. The sprocket teeth include at least one first tooth and at least one second tooth. The at least one first has a first radial-tooth height. The at least one second tooth is adjacent to the first tooth and disposed on a downstream side in a rotational driving direction of the bicycle sprocket. The at least one second tooth has a second radial-tooth height. The first radial-tooth height is greater than the second radial-tooth height. The at least one first tooth includes a tooth tip having an axial center plane in an axial direction. The axial center plane of the tooth tip is offset from the axial center plane of the sprocket body in the axial direction.
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: May 4, 2021
    Assignee: SHIMANO INC.
    Inventor: Akinobu Sugimoto
  • Patent number: 10994804
    Abstract: A bicycle sprocket comprises sprocket teeth. The sprocket teeth include at least one first tooth and at least one second tooth. The at least one first tooth has a first radial-tooth height. The at least one first tooth has an axial center plane in an axial direction parallel to the rotational center axis. The at least one second tooth is adjacent to the first tooth and disposed on a downstream side in a rotational driving direction of the bicycle sprocket. The at least one second tooth has a second radial-tooth height. The first radial-tooth height is greater than the second radial-tooth height. The at least one first tooth includes a tooth tip having an axial center plane in the axial direction. The axial center plane of the tooth tip is offset from the axial center plane of the first tooth in an axial direction.
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: May 4, 2021
    Assignee: SHIMANO INC.
    Inventor: Akinobu Sugimoto
  • Patent number: 10946931
    Abstract: A bicycle rear sprocket assembly is configured to be mounted to a sprocket support body of a bicycle rear hub assembly. The bicycle rear sprocket assembly comprises a plurality of bicycle sprockets. The plurality of bicycle sprockets comprises a first sprocket and a second sprocket. The first sprocket includes a first opening having a first minimum diameter that is smaller than a minimum outer diameter of the sprocket support body of the bicycle rear hub assembly. The second sprocket includes a second opening and at least ten internal spline teeth. The second opening has a second minimum diameter that is equal to or larger than the minimum outer diameter of the sprocket support body of the bicycle rear hub assembly. The at least ten internal spline teeth are configured to engage with the sprocket support body of the bicycle rear hub assembly.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: March 16, 2021
    Assignee: SHIMANO INC.
    Inventor: Hiroshi Fujita
  • Patent number: 10940916
    Abstract: A bicycle rear sprocket comprises a sprocket body and a plurality of sprocket teeth. The plurality of sprocket teeth includes a plurality of first teeth. Each tooth of the plurality of first teeth has a driving surface and a non-driving surface provided on a reverse side of the driving surface in a circumferential direction with respect to the rotational center axis. Each tooth of the plurality of first teeth has an axial maximum tooth-width and an axial driving-surface tooth-width. The axial maximum tooth-width is defined in an axial direction of the rotational center axis as a maximum width in each tooth of the plurality of first teeth. The axial driving-surface tooth-width is smaller than the axial maximum tooth-width. The plurality of first teeth accounts for at least 25% of the plurality of sprocket teeth.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: March 9, 2021
    Assignee: SHIMANO INC.
    Inventor: Atsuhiro Emura
  • Patent number: 10926836
    Abstract: A bicycle rear sprocket assembly comprises a sprocket support and a first sprocket. The sprocket support includes a hub engagement part configured to engage with a bicycle hub assembly. The sprocket support includes a plurality of sprocket attachment members extending radially outwardly from the hub engagement part with respect to a rotational center axis of the bicycle rear sprocket assembly. The first sprocket is attached to the plurality of sprocket attachment members. The first sprocket includes a first sprocket body and a plurality of first sprocket teeth which extends radially outwardly from the first sprocket body with respect to the rotational center axis and a total number of which is equal to or larger than thirty-four. The first sprocket has a plurality of shifting facilitation areas. A total number of the plurality of shifting facilitation areas is a divisor of a total number of the plurality of sprocket attachment members.
    Type: Grant
    Filed: August 24, 2017
    Date of Patent: February 23, 2021
    Assignee: SHIMANO INC.
    Inventors: Hiroshi Fujita, Atsuhiro Emura, Yasufumi Fukunaga, Tsuyoshi Fukumori
  • Patent number: 10919339
    Abstract: A bicycle hub assembly comprises a hub axle, a hub body, a sprocket support structure, and a brake-rotor support structure. The sprocket support structure includes a first torque-transmitting profile and a first externally-threaded portion. The first torque-transmitting profile is configured to transmit a rotational force between the sprocket support structure and a bicycle sprocket assembly. The first externally-threaded portion is configured to threadedly engage with a first internally-threaded portion of a first lock member. The brake-rotor support structure includes a radially external surface, a radially internal surface, and a second torque-transmitting profile configured to transmit a rotational force between the brake-rotor support structure and a brake rotor. The second torque-transmitting profile is provided on the radially external surface.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: February 16, 2021
    Assignee: SHIMANO INC.
    Inventors: Koji Yuasa, Takafumi Nishino, Takehiko Nakajima
  • Patent number: 10919604
    Abstract: A multiple sprocket arrangement for rotatable mounting on a rear wheel axle may include a sprocket carrier. The sprocket carrier has a substantially uniform material thickness. The multiple sprocket arrangement includes smaller sprockets and larger sprockets. The sprocket carrier is formed so that at least three larger sprockets can be fastened to the carrier.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: February 16, 2021
    Assignee: SRAM DEUTSCHLAND GMBH
    Inventor: Sebastian Reineke
  • Patent number: 10899550
    Abstract: The invention relates to a positive drive spiral conveyor which includes, a drive tower rotatable about a vertical axis and a plurality of drive members extending in length from a bottom to a top of the drive tower. The drive members are spaced radially around the drive tower, with each drive member having a projecting driving ridge extending in length along at least a section of each drive member with a projecting shaft positioned on each drive member proximate an end of the driving ridge thereby defining an engagement zone. The projecting shaft defines a guiding surface around the shaft, such that in use a positive drive protrusion of a conveyor belt engages the guiding surface of the projecting shaft and is guided towards a leading side of the driving ridge.
    Type: Grant
    Filed: June 22, 2019
    Date of Patent: January 26, 2021
    Assignee: DALE HOLDINGS (PTY) LTD
    Inventor: Christopher Dale
  • Patent number: 10889353
    Abstract: A bicycle rear sprocket assembly comprises a plurality of sprockets and a sprocket carrier configured to support at least one of the plurality of sprockets. The sprocket carrier includes at least ten internal spline teeth and a circumferentially extending non-splined portion. The at least ten internal spline teeth are configured to engage with the sprocket support body of the bicycle rear hub assembly. The at least ten internal spline teeth extend in an axial direction with respect to a rotational center axis of the bicycle rear sprocket assembly and are spaced apart from each other in a circumferential direction with respect to the rotational center axis. The circumferentially extending non-splined portion is disposed to be adjacent to the at least ten internal spline teeth in the axial direction and recessed from the at least ten internal spline teeth in a radial direction with respect to the rotational center axis.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: January 12, 2021
    Assignee: SHIMANO INC.
    Inventors: Atsuhiro Emura, Hiroshi Fujita, Fumiaki Yoshida
  • Patent number: 10864964
    Abstract: A bicycle rear sprocket assembly 28 comprises a sprocket carrier 31, at least one metallic support 33, and at least one rear sprocket 28a-28h. The sprocket carrier 31 is made of a non-metallic material. The at least one metallic support 33 is attached to at least one of a first circumferentially facing surface 41 and a second circumferentially facing surface 43 of at least one mounting arm 39 of the sprocket carrier 31. The at least one rear sprocket 28a-28h is made of a metallic material. A sprocket body 51 of the at least one rear sprocket 28a-28h is attached to the at least one metallic support 33.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: December 15, 2020
    Inventors: Toru Iwai, Tetsu Nonoshita, Toyoshi Yoshida
  • Patent number: 10859149
    Abstract: A bicycle crankset annular body with a toothed crown that extends about a rotation axis and has axially inner and outer surfaces and a reference plane (R) on which the rotation axis (O) and a longitudinal axis of a right crank arm lies. The annular body's maximum axial thickness, defined at a first angular portion, is between two parallel planes that are orthogonal to the reference plane (R). The angular portion has a lightening recess formed on the axially outer surface between two delimiting planes that pass through the rotation axis (O) and are inclined with respect to the reference plane (R) by first and second angles which are measured on axially outer surface moving angularly in the clockwise direction from the reference plane (R).
    Type: Grant
    Filed: May 17, 2018
    Date of Patent: December 8, 2020
    Assignee: Campagnolo S.r.l.
    Inventor: Mirco Civiero
  • Patent number: 10780944
    Abstract: The present application describes a transmission system, including a certain tooth profile of toothed wheel and its use. This transmission system enables an improved guidance of the chain by using a non-normative tooth profile, to avoid that when the vehicle is exposed to extreme situations disengagements of the chain may occur. This transmission system applies to vehicles, preferably bicycles.
    Type: Grant
    Filed: August 25, 2015
    Date of Patent: September 22, 2020
    Assignee: MIRANDA & IRMAO, LDA.
    Inventor: Joao Filipe Tavares Miranda
  • Patent number: 10773772
    Abstract: A bicycle sprocket assembly is basically provided that includes a sprocket support member, a first sprocket, a second sprocket that is a separate member from the first sprocket, and a third sprocket that is a separate member from the first and second sprockets. The sprocket support member is configured to support at least one of the first, second and third sprockets. The sprocket support member includes a plurality of sprocket support portions extending radially outwardly from a central cylindrical portion. A first reinforcement member is attached to at least one of the first and second sprockets, and extends between the first and second sprockets. A second reinforcement member is attached to at least one of the second and third sprockets, and extends between the second and third sprockets. Each of the first and second reinforcement members is disposed between an adjacent pair of the plurality of sprocket support portions.
    Type: Grant
    Filed: April 12, 2017
    Date of Patent: September 15, 2020
    Assignee: Shimano Inc.
    Inventors: Tsuyoshi Fukumori, Hiroshi Fujita
  • Patent number: 10752320
    Abstract: A bicycle rear hub assembly comprises a hub axle, a hub body, and a sprocket support body. The hub axle includes an axle through-bore that has a minimum inner diameter equal to or larger than 13 mm. The hub body is rotatably mounted on the hub axle about a rotational center axis of the bicycle rear hub assembly. The sprocket support body is rotatably mounted on the hub axle about the rotational center axis.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: August 25, 2020
    Assignee: SHIMANO INC.
    Inventor: Tomonari Oka
  • Patent number: 10717495
    Abstract: A bicycle sprocket comprises a sprocket body, a plurality of sprocket teeth, an axially outward protuberance, and an axially inward protuberance. The axially outward protuberance is disposed on an outward facing side of the sprocket body to overlap at least partly with a bicycle chain engaging with a neighboring bicycle sprocket when viewed along a rotational center axis. The axially inward protuberance is disposed on an inward facing side of the sprocket body to overlap at least partly with the axially outward protuberance when viewed along the rotational center axis.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: July 21, 2020
    Assignee: SHIMANO INC.
    Inventors: Yasufumi Fukunaga, Hiroshi Fujita, Tsuyoshi Fukumori, Atsuhiro Emura
  • Patent number: 10703439
    Abstract: A bicycle sprocket comprises a sprocket body and a plurality of sprocket teeth provided on an outer periphery of the sprocket body and including at least one first tooth and at least one second tooth. The at least one first tooth has a driving surface side and a non-driving surface side. The at least one first tooth has a bevel cut shape in the non-driving surface side. The bevel cut shape is configured to avoid initially engaging with a bicycle chain in a shifting operation where the bicycle chain shifts from an adjacent smaller bicycle sprocket to the bicycle sprocket. The at least one second tooth is configured to initially engage with the bicycle chain in the shifting operation. The at least one second tooth is disposed adjacent to the at least one first tooth in a circumferential direction with respect to a rotational center axis of the bicycle sprocket.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: July 7, 2020
    Assignee: SHIMANO INC.
    Inventor: Tsuyoshi Fukumori
  • Patent number: 10703441
    Abstract: A drive arrangement for a bicycle may include a plurality of sprockets arranged at a rear wheel of the bicycle. The sprockets may be particularly arranged to have a spacing that facilitates the configuration of an increasing number of sprockets in the plurality of sprockets. A singular front sprocket or chain ring may be used to drive the rear plurality of sprockets. The singular front chain ring may include first and second groups of teeth, the first group of teeth being wider than the second group of teeth. The drive arrangement may also include a rear derailleur. A chain having inner link plates with recesses may also be include in the drive arrangement.
    Type: Grant
    Filed: January 5, 2018
    Date of Patent: July 7, 2020
    Assignee: SRAM DEUTSCHLAND GmbH
    Inventors: Pedro Miguel Nunes Dos Santos, Markus Reiter, Joachim Hanke, Bryn Johnson, Andreas Vonend, Martin Kehrer, Henrik Braedt, Luis Figueiredo, Rodrigo Antunes, Bruno Miguel Ferreira Da Silva Ribeiro
  • Patent number: 10689067
    Abstract: A bicycle sprocket assembly comprises a first sprocket and a second sprocket. The first sprocket includes a first sprocket body, first sprocket teeth, and a first pitch circle. The first pitch circle has a first diameter. The second sprocket includes a second sprocket body, second sprocket teeth, and a second pitch circle. The first sprocket teeth include a large-sprocket downshifting tooth and an additional large-sprocket downshifting tooth. The second sprocket teeth include a first small-sprocket downshifting tooth, a second small-sprocket downshifting tooth, a first adjacent tooth, and a second adjacent tooth. A circumferential area is defined from a driving surface of the first adjacent tooth to a non-driving surface of the second adjacent tooth in a driving rotational direction about a rotational center axis when viewed in an axial direction. The large-sprocket downshifting tooth is disposed in the circumferential area when viewed in the axial direction.
    Type: Grant
    Filed: March 3, 2017
    Date of Patent: June 23, 2020
    Assignee: SHIMANO INC.
    Inventor: Kenji Kamada
  • Patent number: 10677338
    Abstract: A bicycle chain ring, including an inner edge fully circumscribing both an opening and an axis of rotation; an inner surface extending between the inner edge and an outer edge where a plurality of chain ring teeth emanate; and a plurality of ramps disposed about the inner surface, wherein at least one of the plurality of ramps has a lifting surface configured to concurrently engage at least one link of a bicycle chain at two or more distinct pivot points along the length of the chain link to initiate stable lift of the bicycle chain without assistance from any of the plurality of chain ring teeth; wherein the lifting surface has a first end proximate the inner edge and a second end proximate the outer edge.
    Type: Grant
    Filed: June 12, 2017
    Date of Patent: June 9, 2020
    Assignee: WICK WERKS, LLC
    Inventor: Christopher A. Wickliffe
  • Patent number: 10668980
    Abstract: A bicycle rear sprocket assembly comprises a first sprocket, a second sprocket, and a sprocket support. The first sprocket includes a first sprocket body and a plurality of first sprocket teeth. The first sprocket body has at least one first recess. The second sprocket includes a second sprocket body and a plurality of second sprocket teeth. The sprocket support is configured to engage with a bicycle hub assembly. The sprocket support includes a sprocket attachment part. The first sprocket and the second sprocket are attached to the sprocket attachment part. The sprocket attachment part is at least partly provided in the at least one first recess to transmit a rotational force between the first sprocket and the sprocket support.
    Type: Grant
    Filed: August 24, 2017
    Date of Patent: June 2, 2020
    Assignee: SHIMANO INC.
    Inventors: Hiroshi Fujita, Atsuhiro Emura
  • Patent number: 10625820
    Abstract: A bicycle rear sprocket assembly comprises a plurality of sprockets and a sprocket carrier. The plurality of sprockets includes a first sprocket and a second sprocket. The first sprocket has at least one circumferential coupling point. The first sprocket is coupled to a radially extending surface of at least one of a plurality of sprocket mounting portions at the at least one circumferential coupling point. The second sprocket has at least one additional circumferential coupling point. The second sprocket is coupled, at the at least one additional circumferential coupling point, to at least one of the sprocket carrier and one of the plurality of sprockets. A total number of the at least one circumferential coupling point is different from a total number of the at least one additional circumferential coupling point.
    Type: Grant
    Filed: January 24, 2018
    Date of Patent: April 21, 2020
    Assignee: SHIMANO INC.
    Inventors: Atsuhiro Emura, Hiroshi Fujita, Fumiaki Yoshida
  • Patent number: 10611431
    Abstract: A bicycle multi-gear cassette mountable to a wheel hub driver mechanism that includes truncated conical shell having a first opening proximate a small shell base and a second opening proximate a large shell base. The openings are coaxial with an axis of the shell. A plurality of toothed sprockets having different numbers of teeth are disposed on the shell and extend radially of the central axis. A torque load transmitting profile is configured on the shell proximate one of the small and large shell bases. A radial load transmitting profile is configured on the shell proximate one of the small and large shell bases. The shell, sprockets, and the load transmitting profiles embody a single piece.
    Type: Grant
    Filed: September 8, 2015
    Date of Patent: April 7, 2020
    Assignee: SRAM, LLC
    Inventor: Henrik Braedt
  • Patent number: 10584786
    Abstract: A bicycle sprocket assembly comprises a sprocket support member and a reinforcement member. The sprocket support member is configured to support a sprocket. The sprocket support member includes a central cylindrical portion and at least one sprocket support portion extending radially outwardly from the central cylindrical portion with respect to a rotational center axis of the bicycle sprocket assembly. The sprocket support member is made of a non-metallic material. The reinforcement member is provided in the central cylindrical portion to reinforce the central cylindrical portion in a circumferential direction about the rotational center axis.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: March 10, 2020
    Assignee: SHIMANO INC.
    Inventors: Tooru Iwai, Tetsu Nonoshita, Toyoshi Yoshida
  • Patent number: 10577051
    Abstract: A bicycle sprocket comprises a plurality of sprocket teeth including at least one first tooth and at least one second tooth. The at least one first tooth has a first non-driving surface including a first non-driving surface portion and a second non-driving surface portion so that a first ridge is formed between the first non-driving surface portion and the second non-driving surface portion. The at least one second tooth is configured to initially engage with the bicycle chain in a shifting operation. The at least one second tooth is disposed adjacent to the at least one first tooth. The at least one second tooth has a second non-driving surface including a third non-driving surface portion and a fourth non-driving surface portion so that a second ridge is formed between the third non-driving surface portion and the fourth non-driving surface portion.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: March 3, 2020
    Assignee: SHIMANO INC.
    Inventors: Yasufumi Fukunaga, Atsuhiro Emura
  • Patent number: 10562589
    Abstract: A multiple bicycle rear sprocket assembly includes first and second sprockets. The first sprocket includes a plurality of first sprocket teeth. The first sprocket teeth include at least one first tooth having a first maximum axial width for engaging with an outer link plate of the chain, and at least one second tooth having a second maximum axial width for engaging with an inner link plate of the chain. The first maximum axial width is larger than the second maximum axial width. The second sprocket includes a plurality of second sprocket teeth. The second sprocket is smaller than the first sprocket. The second sprocket teeth have additional second teeth only. The additional second teeth are configured for engaging with the inner link plate of the chain. The first maximum axial width is larger than a maximum axial width of each of the additional second teeth.
    Type: Grant
    Filed: July 3, 2018
    Date of Patent: February 18, 2020
    Assignee: Shimano Inc.
    Inventors: Akinobu Sugimoto, Yuki Hirose
  • Patent number: 10562587
    Abstract: A cycle crankset, comprising independent cranks articulated around a crank axis and each having a pedal axis, a cam pivotably mounted about the crank axis, and a chainring assembly pivotably mounted about the cam about an axis parallel to the crank axis, the cranks being connected to the chainring assembly via connecting rods, the articulation point between each of the cranks and one of the connecting rods being located on the portion of the crank opposite the pedal axis relative to the crank axis.
    Type: Grant
    Filed: April 4, 2017
    Date of Patent: February 18, 2020
    Assignee: C3B
    Inventor: Jacques Cerdan
  • Patent number: 10507690
    Abstract: A bicycle hub assembly comprises a hub axle, a hub body, and a sprocket support body. The hub body includes a first spoke-mounting portion, a second spoke-mounting portion, and a first axial length. The first axial length is defined between a first axially outermost part of the first spoke-mounting portion and a second axially outermost part of the second spoke-mounting portion in an axial direction and is equal to or larger than 55 mm. The sprocket support body includes a plurality of external spline teeth. The plurality of external spline teeth includes a plurality of external-spline driving surfaces. The plurality of external-spline driving surfaces each includes a radial length defined from a radially outermost edge to a radially innermost edge. A total of the radial lengths of the plurality of external-spline driving surfaces is equal to or larger than 7 mm.
    Type: Grant
    Filed: April 11, 2019
    Date of Patent: December 17, 2019
    Assignee: SHIMANO INC.
    Inventors: Hiroshi Fujita, Kazuki Koshiyama, Takashi Nakanishi
  • Patent number: 10457353
    Abstract: A bicycle rear sprocket assembly is basically provided that includes a first sprocket including a first sprocket body and a plurality of first sprocket teeth provided to an outer periphery thereof. Each of a plurality of first circumferential areas has a first circumferential length. A first total number of the plurality of first circumferential areas is an even number. A first circumferential area counting number from a driving surface of a first shifting initiation tooth to a driving surface of a second shifting initiation tooth in a driving rotational direction of the bicycle rear sprocket assembly is an odd number. A second circumferential area counting number from the driving surface of the second shifting initiation tooth to the driving surface of the first shifting initiation tooth in the driving rotational direction is an odd number. The first circumferential area counting number is different from the second circumferential area counting number.
    Type: Grant
    Filed: October 7, 2016
    Date of Patent: October 29, 2019
    Assignee: Shimano Inc.
    Inventors: Kenji Kamada, Azusa Yamazaki
  • Patent number: 10442496
    Abstract: A bicycle sprocket assembly comprises a sprocket support member. The sprocket support member comprises a central cylindrical portion and a plurality of sprocket support portions. The plurality of sprocket support portions extends radially outwardly from the central cylindrical portion with respect to a rotational center axis of the bicycle sprocket assembly. At least one sprocket support portion of the plurality of sprocket support portions comprises at least one radially extending surface, at least one axially extending surface, and an interior cavity. The at least one radially extending surface extends radially relative to the rotational center axis to support at least one of the at least one sprocket. The at least one axially extending surface extends in an axial direction parallel to the rotational center axis.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: October 15, 2019
    Assignee: SHIMANO INC.
    Inventors: Tooru Iwai, Tetsu Nonoshita, Toyoshi Yoshida
  • Patent number: 10406855
    Abstract: A bicycle hub assembly comprises a hub axle, a hub shell, and a sprocket support body. The sprocket support body includes a tubular part, a first sprocket engaging tooth, and a second sprocket engaging tooth. The tubular part includes an outer peripheral surface and an attachment portion. The first sprocket engaging tooth includes a first radially outer surface provided radially outward of the outer peripheral surface. The second sprocket engaging tooth includes a second radially outer surface and a third radially outer surface. The third radially outer surface is provided radially outward of the outer peripheral surface and radially inward of the second radially outer surface. A first distance is defined from the outer peripheral surface to the first radially outer surface. A second distance is defined from the outer peripheral surface to the third radially outer surface. The second distance is shorter than the first distance.
    Type: Grant
    Filed: March 23, 2017
    Date of Patent: September 10, 2019
    Assignee: SHIMANO INC.
    Inventors: Hiroshi Fujita, Naohiro Nishimoto
  • Patent number: 10407127
    Abstract: A bicycle sprocket comprises a sprocket body, a plurality of sprocket teeth, at least one shifting facilitation projection, and at least one bump portion. The at least one shifting facilitation projection is configured to engage with a bicycle chain in a first shifting operation in which the bicycle chain is shifted from the bicycle sprocket toward a smaller sprocket. The at least one bump portion is provided on a downstream side of the at least one shifting facilitation projection in a driving rotational direction in which the bicycle sprocket rotates during pedaling. The at least one bump portion is spaced apart from the at least one shifting facilitation projection by a distance that is equal to or smaller than two chain pitches.
    Type: Grant
    Filed: November 24, 2016
    Date of Patent: September 10, 2019
    Assignee: SHIMANO INC.
    Inventor: Akinobu Sugimoto
  • Patent number: 10337599
    Abstract: A sprocket module for a bicycle has at least two sprockets fixedly coupled one another. At least one first sprocket of the at least two sprockets comprises engagement portion to a freewheel body of a hub for a bicycle rear wheel. A second sprocket of the module lacks the engagement portion and is supported on the freewheel body through the aforementioned at least one first sprocket. The module allows strong and low-weight sprocket assemblies to be made.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: July 2, 2019
    Assignee: CAMPAGNOLO S.R.L.
    Inventors: Giuseppe Dal PrĂ , Leopoldo Lazzarin
  • Patent number: 10328995
    Abstract: A multi-sprocket arrangement for installation on a rear wheel axle of a bicycle includes a sprocket assembly. The sprocket assembly has at least a first sprocket and a second, self-supporting sprocket. The second sprocket is connected to a holding body via the first sprocket by way of a separate, cylindrical fastener which extends parallel to the rear wheel axle. The fastener has a first and a second end which are connected in frictionally fit fashion to drilled holes in the first and second sprockets. The frictionally fit connection between the fastener and the drilled holes of the sprockets prevents an axial movement of the first and second sprockets toward one another. The fastener is additionally connected, at the first and second ends, in form-fitting fashion, to the first and second sprockets such that an axial movement of the first and second sprockets away from one another is also reliably prevented.
    Type: Grant
    Filed: August 15, 2016
    Date of Patent: June 25, 2019
    Assignee: SRAM DEUTSCHLAND GMBH
    Inventors: Matthias Reinbold, Cole St. John
  • Patent number: 10309515
    Abstract: A bicycle rear sprocket comprises a sprocket body, a plurality of sprocket teeth, a shifting facilitation recess, and an upshifting facilitation projection. The plurality of sprocket teeth extends radially outwardly from the sprocket body. The shifting facilitation recess is to facilitate a shifting operation in which a bicycle chain is shifted between the bicycle rear sprocket and a smaller rear sprocket adjacent to the bicycle rear sprocket without another sprocket between the bicycle rear sprocket and the smaller rear sprocket. The upshifting facilitation projection is provided in the shifting facilitation recess to support the bicycle chain in an upshifting operation in which the bicycle chain is shifted from the bicycle rear sprocket to the smaller rear sprocket.
    Type: Grant
    Filed: April 17, 2017
    Date of Patent: June 4, 2019
    Assignee: SHIMANO INC.
    Inventors: Akihiro Ohno, Toshinari Oishi, Tsuyoshi Fukumori
  • Patent number: 10112681
    Abstract: A bicycle sprocket assembly is basically provided with a bicycle sprocket supporting member and at least one sprocket. The bicycle sprocket supporting member includes an outer peripheral surface and an inner peripheral surface. The outer peripheral surface includes at least one sprocket engaging spline. The inner peripheral surface includes at least one hub engaging spline. The at least one sprocket is configured to be axially movable on the outer peripheral surface of the sprocket supporting member before the bicycle sprocket assembly becomes an assembled state.
    Type: Grant
    Filed: July 21, 2016
    Date of Patent: October 30, 2018
    Assignee: Shimano Inc.
    Inventor: Toshinari Oishi
  • Patent number: 10059400
    Abstract: A multiple bicycle sprocket assembly is basically provided that is capable of creating a gear ratio in a wide range. The multiple bicycle sprocket assembly includes a first sprocket and a second sprocket. The first sprocket includes a first tooth number that is less than or equal to ten. The second sprocket includes a second tooth number that is more than or equal to forty-four.
    Type: Grant
    Filed: November 17, 2015
    Date of Patent: August 28, 2018
    Assignee: Shimano Inc.
    Inventors: Koji Tokuyama, Kenji Ose, Toshinari Oishi, Kenji Kamada, Sota Yamaguchi
  • Patent number: 10053186
    Abstract: A plurality of sprockets which are coaxial with respect to a sprocket rotation axis, are arranged with axial spacing from each other and have different numbers of teeth which are constructed for positive-locking engagement with a bicycle chain. The pinion arrangement has a gear range quotient which is formed by division of the number of teeth of the sprocket having the largest diameter by the number of teeth of the sprocket having the smallest diameter, and has a packing density quotient which is formed by division of the number of sprockets in the sprocket arrangement by the axial spacing measured in millimeters of the axially outermost pinions from each other. The pinion arrangement may have a gear range packing coefficient, formed from the product of the gear range quotient and the packing density quotient, which is greater than 1.25.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: August 21, 2018
    Assignee: SRAM Deutschland GmbH
    Inventors: Henrik Braedt, Matthias Reinbold
  • Patent number: 10040510
    Abstract: A bicycle sprocket has a sprocket main body, a plurality of teeth disposed on the sprocket main body, and at least one shifting area. The teeth include at least one first tooth having a first maximum axial width and at least one second tooth having a second maximum axial width. The first maximum axial width is larger than the second maximum axial width. The first tooth is configured to engage with an outer link plate of a chain. The second tooth is configured to engage with an inner link plate of the chain. The at least one shifting area includes an area where a chain engages with one of the teeth during shifting from a small sprocket to the bicycle sprocket and an area where the chain separates from one of the teeth during a shifting action from the bicycle sprocket to the small sprocket.
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: August 7, 2018
    Assignee: Shimano Inc.
    Inventors: Akinobu Sugimoto, Yuki Hirose
  • Patent number: 10005520
    Abstract: A bicycle driving system includes a crank assembly and a multiple rear sprocket assembly. The crank assembly includes a front sprocket including a rotational center axis and a crank arm. The front sprocket is movable relative to the crank arm in an axial direction parallel to the rotational center axis. The multiple rear sprocket assembly includes eleven or more rear sprockets.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: June 26, 2018
    Assignee: SHIMANO INC.
    Inventor: Nobukatsu Hara
  • Patent number: 9994285
    Abstract: A multiple bicycle sprocket assembly is basically provided with a first sprocket supporting member and a second sprocket supporting member. A first sprocket is coupled to one of a first bicycle inbound facing side and a first bicycle outbound facing side of the first sprocket supporting member, and is a separate member therefrom. A second sprocket is coupled to one of a second bicycle inbound facing side and a second bicycle outbound facing side of the second sprocket supporting member, and is a separate member therefrom. At least one fastening member connects the first sprocket supporting member and the second sprocket supporting member, and is a separate member therefrom. At least one hub engaged sprocket is free from connection with the at least one fastening member, and is a separate member from the first and second sprocket supporting members.
    Type: Grant
    Filed: June 15, 2016
    Date of Patent: June 12, 2018
    Assignee: Shimano Inc.
    Inventors: Koji Tokuyama, Takahiko Umezawa
  • Patent number: 9919764
    Abstract: A bicycle sprocket includes a sprocket body and a chain engagement structure. The sprocket body has a center rotational axis, a first side surface and a second side surface. The first and second side surfaces face oppositely with respect to an axial direction of the bicycle sprocket. The first side surface is a smaller sprocket facing side of the bicycle sprocket. The chain engagement structure includes a plurality of sprocket teeth extending radially outward from an outer periphery of the sprocket body. The sprocket teeth include at least one shift assist tooth having a recessed portion recessed from the first side surface toward the second side surface. A protuberance is formed in the recessed portion.
    Type: Grant
    Filed: January 15, 2015
    Date of Patent: March 20, 2018
    Assignee: Shimano Inc.
    Inventor: Tsuyoshi Fukumori
  • Patent number: 9914502
    Abstract: A detachable chainring assembly includes a first chainring, a second chainring and a locking part. The first chainring includes a first through hole. The second chainring includes a first surface, a second surface, a driven hole, and a plurality of first protrusion parts. The second surface is opposite to the first surface. The driven hole runs through the first surface and the second surface for securing a driving portion of a crank arm. The first protrusion parts protrude from the second surface and are disposed around the driven hole, and at least one of the first protrusion parts has a first locked hole. The locking part is detachably secured to the first through hole and the first locked hole such that the first chainring and the second chainring are jointly secured to each other via the locking part.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: March 13, 2018
    Assignee: TH INDUSTRIES CO., LTD.
    Inventor: Poki Wu
  • Patent number: 9902463
    Abstract: A roller chain based drive train for a bicycle includes a sprocket assembly configured for mounting to a hub of a rear wheel of the bicycle. The sprocket assembly includes a smaller sprocket, a larger sprocket, and a plurality of pins connecting the smaller sprocket and the larger sprocket to each other. The pins are mounted in outer pin mount holes on the smaller sprocket and in the inner pin mount holes on the larger sprocket.
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: February 27, 2018
    Assignee: SRAM, LLC
    Inventor: Henrik Braedt