Multi-stage sprocket assembly for a bicycle

Details Multi-stage sprocket assembly for a bicycle Multi-stage sprocket assembly for a bicycle

1978-11-09

1980-04-22

Braun, Leslie

Machine element or mechanism

Gearing

Toothed gear and recirculated unconnected elements

74217B, F16H 5530, F16H 900

Patent

active

041988760

ABSTRACT:
A multi-stage sprocket assembly for a bicycle, including two or more sprockets, in which at least one of axially outermost sprockets is provided at the laterally outer surface of a body thereof with a plurality of projections extending axially outwardly of the sprocket, the projections being positioned circumferentially of the sprocket body and radially inwardly of the dedendum circle of the sprocket, so that a driving chain may, when riding over and coming off the sprocket, be stopped by the projections to thereby be reliably prevented from being jammed between the sprocket and a spoke, hub flange or crank arm at the bicycle.

REFERENCES:
patent: 3648519 (1972-03-01), Nakata et al.
patent: 3835729 (1974-09-01), Tarutani
patent: 4116319 (1978-09-01), Nagano et al.
Gt. Britain reference to Allison, 1897, 1 page. _

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