公开(公告)号：US11414157B2

公开(公告)日：2022-08-16

申请号：US16275767

申请日：2019-02-14

Applicant: SHIMANO Inc.

Inventor： Azusa Yamazaki ,  Kenji Kamada

IPC: B62M9/10 ,  F16H55/30

Abstract: It is intended to provide a bicycle rear sprocket assembly that can reduce shock in a gear shifting operation and can reduce changing of gear ratio during the gear shifting operation. A bicycle rear sprocket assembly includes a plurality of sprockets. A total tooth number of at least one of the plurality of sprockets is an even number. The plurality of sprockets have at least two coaxially arranged sprockets. At least one of the at least two coaxially arranged sprockets has an upshifting facilitation area and a downshifting facilitation area. Each of the at least two coaxially arranged sprockets has a total tooth number that is equal to or larger than eighteen. The tooth number difference is equal to or smaller than seven.

公开(公告)号：US10093388B2

公开(公告)日：2018-10-09

申请号：US15195969

申请日：2016-06-28

Applicant: SHIMANO INC.

Inventor： Kenji Kamada

IPC: F16H55/12 ,  F16H55/30 ,  B62M9/10

Abstract: A first sprocket includes a first opening having a first diameter smaller than a radially outer diameter of a sprocket support portion of a bicycle rear hub assembly. A lock member includes a main body, a male thread portion, and a radial projection. The main body has a first axial end configured to pass through the first opening and a second axial end opposite to the first axial end in an axial direction. The male thread portion is provided to the first axial end and configured to engage with a female thread portion of the bicycle rear hub assembly in a state where a bicycle rear sprocket assembly is mounted to the bicycle rear hub assembly. The radial projection extends radially outwardly from the second axial end to restrict axial displacement of the first sprocket with respect to the sprocket support portion in the state.

公开(公告)号：US11577803B2

公开(公告)日：2023-02-14

申请号：US16698815

申请日：2019-11-27

Applicant: Shimano Inc.

Inventor： Kenji Kamada

IPC: B62M9/1248 ,  B62M9/122 ,  B62M9/124

Abstract: A derailleur comprises a base member configured to be attached to a human-powered vehicle frame, a movable member movable with respect to the base member, a pulley assembly pivotally attached to the movable member in a first pivotal direction and a second pivotal direction opposite to the first pivotal direction and including a first pulley having a first pulley axis and a second pulley having a second pulley axis, a pulley assembly biasing member configured to bias the pulley assembly with respect to the movable member in the first pivotal direction, a pulley distance (centimeter) being defined between the first pulley axis and the second pulley axis, a biasing return force (newton) being defined by rotational force of the pulley assembly relative to the movable member, and a return value defined by the biasing return force multiplied by the pulley distance. The return value is 136 or larger.

公开(公告)号：US11180217B2

公开(公告)日：2021-11-23

申请号：US16008884

申请日：2018-06-14

Applicant: Shimano Inc.

Inventor： Koji Tokuyama ,  Kenji Ose ,  Toshinari Oishi ,  Kenji Kamada ,  Sota Yamaguchi

IPC: B62M9/10

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.

公开(公告)号：US11148755B2

公开(公告)日：2021-10-19

申请号：US16034374

申请日：2018-07-13

Applicant: SHIMANO INC.

Inventor： Kenji Kamada

IPC: B62M9/126 ,  B62M9/16

Abstract: A bicycle derailleur comprises a base member, a movable member, and a chain guide. The chain guide comprises an inner guide plate, an outer guide plate, at least one pulley axle, and at least one pulley. The chain guide is configured to be movable between a plurality of shifting positions. The at least one pulley is configured to be movable between the inner guide plate and the outer guide plate within a maximum pulley movable amount in a pulley axial direction with respect to a rotational center axis of the at least one pulley. A single shifting distance is defined between adjacent shifting positions of the plurality of shifting positions. A ratio of the maximum pulley movable amount to the single shifting distance ranges from 0.21 to 0.35.

公开(公告)号：US10850561B2

公开(公告)日：2020-12-01

申请号：US15220343

申请日：2016-07-26

Applicant: SHIMANO INC.

Inventor： Kenji Kamada

IPC: B62K25/02 ,  B60B27/02

Abstract: A bicycle wheel securing device comprises a shaft, an axial abutment structure, a bicycle-body engaging structure, a manual actuator, and a shaft-end retaining structure. The shaft has a first shaft end, a second shaft end, and a longitudinal center axis. The manual actuator is operatively connected to the axial abutment structure to bias the axial abutment structure against a first wheel attachment part of a bicycle body in response to operation of the manual actuator in a securing state where the bicycle-body engaging structure is engaged with a second wheel attachment part of the bicycle body. The shaft-end retaining structure is at least partly disposed at the second shaft end to retain the second shaft end in the first wheel attachment part in a maintenance state where the second shaft end is positioned in the first wheel attachment part of the bicycle body.

公开(公告)号：US10689067B2

公开(公告)日：2020-06-23

申请号：US15448589

申请日：2017-03-03

Applicant: SHIMANO INC.

Inventor： Kenji Kamada

IPC: B62M9/10 ,  F16H55/30 ,  B62M9/12

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.

公开(公告)号：US10352397B2

公开(公告)日：2019-07-16

申请号：US15447015

申请日：2017-03-01

Applicant: SHIMANO INC.

Inventor： Kenji Kamada ,  Koji Yuasa

IPC: B62M9/00 ,  B62M9/10 ,  B62M9/12 ,  F16G13/06 ,  F16H55/30

Abstract: A bicycle chain comprises a first inner link plate comprising a first end portion, a second end portion, and a first intermediate portion. A second inner link plate is spaced apart from the first inner link plate in an axial direction. The second inner link plate comprises a third end portion, a fourth end portion, and a second intermediate portion. The first inner link plate includes a first outer surface and a first inner surface opposite to the first outer surface in the axial direction. The second inner link plate includes a second outer surface and a second inner surface opposite to the second outer surface in the axial direction. The first intermediate portion has an axial recess formed on the first inner surface in the axial direction. The second intermediate portion is free from an axial recess formed on the second inner surface in the axial direction.

公开(公告)号：US10183724B2

公开(公告)日：2019-01-22

申请号：US15359084

申请日：2016-11-22

Applicant: Shimano Inc.

Inventor： Nobukatsu Hara ,  Kenji Kamada ,  Masahiro Nakakura

IPC: B62L3/00 ,  B62L3/02 ,  B62K23/06 ,  B62M25/04 ,  B62K21/12

Abstract: A bicycle hydraulic operating system is basically provided with a first base member, a piston, a first operating member, a second base member and a second operating member. The first base member includes a first bicycle fixing structure and a hydraulic cylinder defining a cylinder bore. The piston is movably disposed in the cylinder bore of the first base member. The first operating member is movably mounted to the first base member. The first operating member is operatively coupled to the piston to move the piston in the cylinder bore of the first base member. The second base member includes a second bicycle fixing structure. The second operating member is movably mounted to the second base member. The second operating member is operatively coupled to the piston to move the piston in the cylinder bore of the first base member.

公开(公告)号：US10059400B2

公开(公告)日：2018-08-28

申请号：US14943303

申请日：2015-11-17

Applicant: Shimano Inc.

Inventor： Koji Tokuyama ,  Kenji Ose ,  Toshinari Oishi ,  Kenji Kamada ,  Sota Yamaguchi

IPC: B62M9/10

CPC classification number: B62M9/10

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.