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 transmission

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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
Application number
IT2702777A
Other languages
Italian (it)
Original Assignee
Browning Bruce W
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Browning Bruce W filed Critical Browning Bruce W
Priority to IT2702777A priority Critical patent/IT1114125B/en
Application granted granted Critical
Publication of IT1114125B publication Critical patent/IT1114125B/en

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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.
IT2702777A 1977-08-29 1977-08-29 Bicycle derailleur type gear change - has sprocket halves pivotable to displace teeth axially to allow constant torque transmission IT1114125B (en)

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)

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