Derailleur

Details Derailleur Derailleur

1995-12-15

1998-04-14

Schoeppel, Roger L.

Endless belt power transmission systems or components

Positive drive pulley or guide roll

And additional coaxial surface for engaging same belt in...

474160, 474164, F16H 5530, B62M 912

Patent

active

057386030

ABSTRACT:
Derailleur with at least two sprockets on a sprocket set which is located around a pedal axle of a bicycle, which sprockets are provided with chain transfer assistance measures to assist the transfer of the chain in upshifting or downshifting, whereby the shifting can be done under load in both of these directions. The chain transfer assistance measures comprise a tooth space with a spiral-shaped base, a conical rivet with an encircling sharp edge to locate the chain in the vicinity of its links between the chain plates, as well as bevels, recesses and steps, the totality of which optimize the chain transfer in both directions between sprockets which are coordinated with one another.

REFERENCES:
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patent: 5123878 (1992-06-01), Nagano
patent: 5192248 (1993-03-01), Nagano
patent: 5192249 (1993-03-01), Nagano
patent: 5503598 (1996-04-01), Neuer et al.

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