Invention Application
- Patent Title: FRONT SPROCKET ASSEMBLY FOR HUMAN-POWERED VEHICLE
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Application No.: US17332942Application Date: 2021-05-27
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Publication No.: US20220379997A1Publication Date: 2022-12-01
- Inventor: Kohei OHYABU , Tomohiro NOMA , Hiroyuki TORII
- Applicant: SHIMANO INC.
- Applicant Address: JP Sakai City
- Assignee: SHIMANO INC.
- Current Assignee: SHIMANO INC.
- Current Assignee Address: JP Sakai City
- Main IPC: B62M9/10
- IPC: B62M9/10 ; B62M9/136

Abstract:
A front sprocket assembly comprises a first sprocket and a second sprocket. The second sprocket includes a second sprocket body and a plurality of second sprocket teeth. At least one tooth of the plurality of second sprocket teeth includes a less chain-interference recess provided to the second axially inwardly facing surface. The less chain-interference recess is configured to reduce interference between the at least one tooth of the plurality of second sprocket teeth and a chain in an upshifting operation in which the chain is shifted from the first sprocket toward the second sprocket. The less chain-interference recess has a radially innermost end positioned radially inwardly from a tooth bottom circle of the plurality of second sprocket teeth. A radial distance radially defined from the tooth bottom circle to the radially innermost end with respect to a rotational center axis is equal to or larger than 1.0 mm.
Public/Granted literature
- US11691693B2 Front sprocket assembly for human-powered vehicle Public/Granted day:2023-07-04
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