公开(公告)号：US11364971B2

公开(公告)日：2022-06-21

申请号：US15665322

申请日：2017-07-31

Applicant: SHIMANO INC.

Inventor： Kenji Kamada

IPC: B62M9/1242 ,  F16H55/30 ,  B62M9/10 ,  B62M9/126

Abstract: A bicycle sprocket assembly comprises a plurality of sprockets comprising at least twelve sprockets having different numbers of teeth. The at least twelve sprockets are coaxially arranged along a rotational center axis of the bicycle sprocket assembly. An entire gear range of the plurality of sprockets is equal to or larger than 360%. An average percentage gear stage step of the plurality of sprockets being equal to or larger than 10%. The average percentage gear stage step of the plurality of sprockets is smaller than 15%.

公开(公告)号：US20190300109A1

公开(公告)日：2019-10-03

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：US10053187B2

公开(公告)日：2018-08-21

申请号：US15204957

申请日：2016-07-07

Applicant: SHIMANO INC.

Inventor： Kenji Kamada

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

CPC classification number: B62M9/10 ,  F16H55/30

Abstract: A bicycle rear sprocket assembly comprises a first sprocket. The first sprocket includes a first sprocket body, a plurality of first sprocket teeth, a bearing unit mounting section, and a first torque-transmitting structure. The plurality of first sprocket teeth extend radially outwardly from a first radially outer periphery of the first sprocket body with respect to a rotational center axis. The bearing unit mounting section is at least partly provided to a first radially inner periphery of the first sprocket body. The first torque-transmitting structure is configured to transmit pedaling torque to a second sprocket separately disposed adjacent to the first sprocket without another sprocket between the first sprocket and the second sprocket. The first torque-transmitting structure is provided to a first bicycle inbound facing surface and is a separate member from the second sprocket.