Adapter chainring

Details Adapter chainring Adapter chainring

1993-03-25

1994-05-24

Bui, Thuy M.

Endless belt power transmission systems or components

Positive drive pulley or guide roll

474160, F16H 5530

Patent

active

053143663

ABSTRACT:
The invention is an adapter chainring for a multiple speed bicycle comprising a derailleur and a crankset having outer and inner chainrings. The adapter chainring has teeth disposed on its outer periphery for engaging the bicycle chain. The adapter chainring defines a plurality of holes which receive bolts to attach the adapter chainring to the crankset in place of the conventional inner chainring of a two chainring crankset, and to a third, smaller inner chainring which is added to the crankset to convert it to a three chainring crankset having additional, lower gears.

REFERENCES:
patent: 3082637 (1961-10-01), Paxton
patent: 4009621 (1977-03-01), Segawa
patent: 4144773 (1979-03-01), Addicks
patent: 4259880 (1981-04-01), Ueno
patent: 4583422 (1986-04-01), Boyd
patent: 4988328 (1991-01-01), Iwasaki et al.
patent: 5213550 (1993-05-01), Wu
patent: 5217413 (1993-06-01), Nagano

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