Rotatable seal assembly for a bicycle hub transmission

• US 6,325,386 B1
• Filed: 03/30/1999
• Issued: 12/04/2001
• Est. Priority Date: 03/30/1999
• Status: Expired due to Term

• Current Assignee: Shimano Inc
• Original Assignee: Shimano Inc
• Inventors: Shoge, Akihiko
• Primary Examiner(s): Browne, Lynne H.
• Assistant Examiner(s): PATEL, VISHAL A
• Application Number:
  US09/281,634
• Time in Patent Office: 980 Days
• Field of Search: 277/500, 277/549, 277/551, 277/562, 277/572, 277/576, 384/486, 475/285, 475/297
• US Class Current: 277/500
• CPC Class Codes: B60B 27/0005 with ball bearings
• CPC Class Codes: B60B 27/0073 characterised by sealing means
• CPC Class Codes: B60B 27/0078 characterised by the fixation of bearings
• CPC Class Codes: B60B 27/023 specially adapted for bicycles
• CPC Class Codes: B60B 27/047 comprising a freewheel mechanisms
• CPC Class Codes: B62M 11/16 built in, or adjacent to, the ground-wheel hub

Abstract

A seal for a bicycle transmission includes an annular housing and an annular seal member. The housing includes a side wall defining a plurality of circumferentially disposed slots. The seal member is retained to the housing and extends radially inwardly. The seal member is formed from a resilient material, and the housing is formed from a material that is more rigid than the seal member.

Claims

1. A seal for a bicycle transmission comprising:

an annular housing including a side wall having an outer peripheral surface and an inner peripheral surface, wherein the side wall defines a plurality of circumferentially disposed slots defining a plurality of coupling tabs;

an annular seal member formed from a resilient material, wherein the seal member is retained to the housing and extends radially inwardly;

wherein the housing includes a coupling projection extending radially inwardly from at least one of the plurality of coupling tabs for engaging an outer surface of the bicycle transmission;

wherein the coupling projection is axially spaced apart from the seal member; and

wherein the housing is formed from a material that is more rigid than the seal member.

2. The seal according to claim 1 wherein the plurality of slots extend through an end of the side wall.

3. The seal according to claim 1 wherein the housing is formed from metal.

4. The seal according to claim 3 wherein the seal member is formed from rubber.

5. The seal according to claim 1 wherein the coupling projection extends from the inner peripheral surface of the housing.

6. The seal according to claim 5 wherein an outer peripheral surface of the seal member includes a coupling groove that engages the coupling projection.

7. The seal according to claim 1 wherein the side wall has a cylindrical shape.

8. The seal according to claim 1 wherein an inner peripheral surface of the seal member forms a first lip.

9. The seal according to claim 8 wherein the seal member includes a second lip extending in a different direction from the first lip.

10. The seal according to claim 1 wherein the seal member is retained to the inner peripheral surface of the housing.

11. A bicycle hub comprising:

a hub shell that rotates around a hub axis, wherein the hub shell has at least one of a hub coupling projection or a hub coupling groove on an outer peripheral surface thereof;

an inner member disposed coaxially with the hub shell;

a transmission for communicating a driving force to the hub shell through a plurality of transmission paths; and

a seal including;

an annular housing including a side wall having an outer peripheral surface and an inner peripheral surface, wherein the side wall has at least one of a side wall coupling projection or a side wall coupling groove engaging the at least one of the hub coupling groove or hub coupling projection, respectively, so that the housing is nonrotatably retained to the hub shell when the hub shell rotates around the hub axis;

the side wall defines a plurality of circumferentially disposed slots;

an annular seal member retained to the housing, extending radially inwardly and contacting the inner member; and

wherein the seal member is axially spaced from the at least one of the side wall coupling projection or the side wall coupling groove.

12. The bicycle hub according to claim 11 wherein the inner member comprises a driving member rotatably mounted around the hub shell for supplying the driving force to the hub shell.

13. The bicycle hub according to claim 11 wherein the inner member comprises a bearing cone.

14. The bicycle hub according to claim 12 wherein the plurality of slots extend through an end of the side wall that is coupled to the hub shell.

15. The bicycle hub according to claim 11 wherein the seal member is formed from a resilient material.

16. The bicycle hub according to claim 11 wherein the at least one of the hub coupling projection or hub coupling groove is the hub coupling groove, wherein the at least one of the side wall coupling projection or side wall coupling groove is the side wall coupling projection, and wherein the side wall coupling projection engages the hub coupling groove.

17. The bicycle hub according to claim 16 wherein the side wall coupling projection is disposed on the inner peripheral surface of the side wall.

18. The bicycle hub according to claim 11 wherein a seal coupling projection extends radially inwardly from the side wall, and wherein the seal member includes a seal coupling groove engaging the seal coupling projection.

19. The bicycle hub according to claim 11 wherein the side wall has a cylindrical shape.

20. The bicycle hub according to claim 11 wherein an inner peripheral surface of the seal member forms a first lip.

21. The bicycle hub according to claim 20 wherein the seal member includes a second lip extending in a different direction from the first lip.

22. A bicycle hub comprising:

a hub shell that rotates around a hub axis, wherein the hub shell has at least one of a hub coupling projection or a hub coupling groove on an outer peripheral surface thereof;

an inner member disposed coaxially with the hub shell;

a transmission for communicating a driving force to the hub shell through a plurality of transmission paths; and

a seal including;

an annular housing including a side wall having an outer peripheral surface and an inner peripheral surface, wherein the side wall has at least one of a side wall coupling projection or a side wall coupling groove engaging the at least one of the hub coupling groove or hub coupling projection, respectively, so that the housing is nonrotatably retained relative to the hub shell;

an annular seal member retained to the housing, extending radially inwardly and contacting the inner member; and

wherein the seal member is axially spaced from the at least one of the side wall coupling projection or the side wall coupling groove;

wherein the at least one of the hub coupling projection or hub coupling groove is the hub coupling groove, wherein the at least one of the side wall coupling projection or side wall coupling groove is the side wall coupling projection, wherein the side wall coupling projection is disposed on an inner peripheral surface of the side wall and engages the hub coupling groove, and wherein the side wall defines a plurality of circumferentially disposed slots extending through an end of the side wall that is coupled to the hub shell.

23. The bicycle hub according to claim 22 wherein the housing is formed from metal, and wherein the seal member is formed from rubber.