Speed change mechanism for a bicycle

Details Speed change mechanism for a bicycle Speed change mechanism for a bicycle

1975-02-20

1976-11-30

Scott, Samuel

Machine element or mechanism

Gearing

Toothed gear and recirculated unconnected elements

74242, F16H 1108, F16H 718, F16H 722

Patent

active

039941671

ABSTRACT:
A speed change mechanism for a bicycle having a gear cluster of pinions on which a chain is selectively engaged, such as on a derailleur or the like, comprising a chain-tensioning system including at least one sprocket wheel engaging the chain, a transverse displacing mechanism coupled to the chain-tensioning system to shift the same and the chain on the pinions during speed change, and a cap member preferably including side parts straddling the sprocket wheel. The sprocket wheel is coupled to the transverse displacing mechanism for rotation about an axis and the cap member is connected to the transverse displacing mechanism such that the cap member has a fixed angular position relative to the axis. The cap member has front and rear side parts, the front side part being prolonged longitudinally towards the gear cluster to push and guide the chain proximate the pinions during speed change.

REFERENCES:
patent: 3710636 (1973-01-01), Ozaki

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