IT1114125B - Bicycle derailleur type gear change - has sprocket halves pivotable to displace teeth axially to allow constant torque transmission - Google Patents
Bicycle derailleur type gear change - has sprocket halves pivotable to displace teeth axially to allow constant torque transmissionInfo
- Publication number
- IT1114125B IT1114125B IT2702777A IT2702777A IT1114125B IT 1114125 B IT1114125 B IT 1114125B IT 2702777 A IT2702777 A IT 2702777A IT 2702777 A IT2702777 A IT 2702777A IT 1114125 B IT1114125 B IT 1114125B
- Authority
- IT
- Italy
- Prior art keywords
- sprocket
- torque transmission
- gear change
- diameter
- constant torque
- Prior art date
Links
Landscapes
- Transmissions By Endless Flexible Members (AREA)
Abstract
A pair of sprocket sectors (35, 36) each having one or more sprocket wheel halves are respectively movable on a rotatable support. They are movable from a position where same diameter halves are in the same plane to form a full sprocket to a position where some teeth of one half move to align with teeth of a different diameter half or an associated different diameter full sprocket (34). This movement causes a bicycle chain (21) to transfer from one diameter sprocket to another whilst retaining driving engagement throughout. Each sector is pivoted at one end on the support about a pin (39a) common to both so that their remote ends move axially for gear changing in either diameter direction.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2702777A IT1114125B (en) | 1977-08-29 | 1977-08-29 | Bicycle derailleur type gear change - has sprocket halves pivotable to displace teeth axially to allow constant torque transmission |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2702777A IT1114125B (en) | 1977-08-29 | 1977-08-29 | Bicycle derailleur type gear change - has sprocket halves pivotable to displace teeth axially to allow constant torque transmission |
Publications (1)
Publication Number | Publication Date |
---|---|
IT1114125B true IT1114125B (en) | 1986-01-27 |
Family
ID=11220805
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT2702777A IT1114125B (en) | 1977-08-29 | 1977-08-29 | Bicycle derailleur type gear change - has sprocket halves pivotable to displace teeth axially to allow constant torque transmission |
Country Status (1)
Country | Link |
---|---|
IT (1) | IT1114125B (en) |
-
1977
- 1977-08-29 IT IT2702777A patent/IT1114125B/en active
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