Gear for bicycles and a freewheel for bicycles including a plura

Details Gear for bicycles and a freewheel for bicycles including a plura Gear for bicycles and a freewheel for bicycles including a plura

1990-11-21

1991-11-19

Bui, Thuy M.

Endless belt power transmission systems or components

Positive drive pulley or guide roll

474 80, F16H 700

Patent

active

050662643

ABSTRACT:
A freewheel for bicycles has a plurality of gears each of which, with the exception of the one with the smallest diameter, has teeth arranged in successive sets of three constituted each by teeth of three different types. A first type of tooth has a face which is recessed relative to the corresponding flat face of the gear. A second type of tooth has a groove formed in the top surface of the tooth and extending circumferentially of the gear. A third type of tooth has a top chamfer on its face situated on the side opposite the recessed face of the first tooth.

REFERENCES:
patent: 3661021 (1972-05-01), Ohshita
patent: 3956943 (1976-05-01), Yamasaki
patent: 3964330 (1976-06-01), Ozaki
patent: 4612004 (1986-09-01), Nagano
patent: 4813916 (1989-03-01), Valin

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