IP Library › Granted Patent US 12,286,195
Granted Patent B2
US 12,286,195 · App. 18/505,047 · Granted Apr 29, 2025

Bicycle rear sprocket assembly

Inventor: Hiroshi Fujita (Sakai, JP)
Assignee: SHIMANO INC.
B62M9/10B60B27/0052B60B27/023B60B27/04F16H55/30
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Quick Facts
Patent No.
US 12,286,195
App. No.
18/505,047
Granted
Apr 29, 2025
Kind
B2
Abstract

A bicycle rear sprocket comprises a sprocket body, a plurality of sprocket teeth, an opening, and a torque-transmitting structure. The plurality of sprocket teeth extends radially outwardly from the sprocket body with respect to a rotational center axis of the bicycle rear sprocket. The opening has a minimum diameter that is smaller than a minimum outer diameter of a sprocket support body of a bicycle rear hub assembly. The torque-transmitting structure includes at least ten torque-transmitting teeth configured to directly or indirectly transmit a pedaling torque to the sprocket support body of the bicycle rear hub assembly.

Claims (36)

1. A bicycle rear sprocket comprising:

a sprocket body;

a plurality of sprocket teeth extending radially outwardly from the sprocket body with respect to a rotational center axis of the bicycle rear sprocket;

an opening having a minimum diameter that is smaller than a minimum outer diameter of a sprocket support body of a bicycle rear hub assembly; and

a torque-transmitting structure including at least ten torque-transmitting teeth configured to directly or indirectly transmit a pedaling torque to the sprocket support body of the bicycle rear hub assembly, wherein

the at least ten torque-transmitting teeth extend radially outwardly.

2. The bicycle rear sprocket according to claim 1 , wherein

the torque-transmitting structure is provided to a first inward facing side of the bicycle rear sprocket.

3. A bicycle rear sprocket comprising:

a sprocket body;

a plurality of sprocket teeth extending radially outwardly from the sprocket body with respect to a rotational center axis of the bicycle rear sprocket;

an opening having a minimum diameter that is smaller than a minimum outer diameter of a sprocket support body of a bicycle rear hub assembly; and

a torque-transmitting structure including at least ten torque-transmitting teeth configured to indirectly transmit a pedaling torque to the sprocket support body of the bicycle rear hub assembly.

4. The bicycle rear sprocket according to claim 3 , wherein

the at least ten torque-transmitting teeth are configured to engage with an adjacent larger sprocket.

5. The bicycle rear sprocket according to claim 1 , wherein

a total number of the at least ten torque-transmitting teeth is equal to or larger than 20.

6. The bicycle rear sprocket according to claim 5 , wherein

the total number of the at least ten torque-transmitting teeth ranges from 22 to 24.

7. The bicycle rear sprocket according to claim 6 , wherein

the total number of the at least ten torque-transmitting teeth is 23.

8. The bicycle rear sprocket according to claim 1 , wherein

a total number of the plurality of sprocket teeth is equal to or larger than 10.

9. The bicycle rear sprocket according to claim 1 , wherein

the at least ten torque-transmitting teeth do not overlap with the plurality of sprocket teeth when viewed in a radial direction from the rotational center axis of the bicycle rear sprocket.

10. The bicycle rear sprocket according to claim 1 , wherein

the at least ten torque-transmitting teeth are axially offset from the plurality of sprocket teeth along the rotational center axis of the bicycle rear sprocket.

11. The bicycle rear sprocket according to claim 1 , wherein

the sprocket body includes a cylindrical portion with an inner surface that defines the opening, and

the at least ten torque-transmitting teeth extend radially outwardly from the cylindrical portion.

12. A bicycle rear sprocket comprising:

a sprocket body;

a plurality of sprocket teeth extending radially outwardly from the sprocket body with respect to a rotational center axis of the bicycle rear sprocket;

an opening having a minimum diameter that is smaller than a minimum outer diameter of a sprocket support body of a bicycle rear hub assembly; and

a torque-transmitting structure including at least ten torque-transmitting teeth configured to directly or indirectly transmit a pedaling torque to the sprocket support body of the bicycle rear hub assembly, wherein

the at least ten torque-transmitting teeth are axially offset from the plurality of sprocket teeth along the rotational center axis of the bicycle rear sprocket.

Continuity (4)
Continuation 17118609 · Dec 11, 2020
Continuation 15851781 · Dec 22, 2017
Continuation In Part 15712388 · Sep 22, 2017
Related Publication 20240067301A1 · Feb 29, 2024
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