Driving device for bicycle

Details Driving device for bicycle Driving device for bicycle

1976-03-29

1977-04-19

Scott, Samuel

Machine element or mechanism

Gearing

Toothed gear and recirculated unconnected elements

74243R, F16h 5530

Patent

active

040180956

ABSTRACT:
A driving device for a bicycle comprises a front gear mounted to a crank, a rear gear mounted to a rear hub, and a driving chain maintained under pressure across both the front and rear gears, both the gears comprising sprocket wheels having their tooth pitches less than 12.7mm respectively and the chain having its pitch equal to or being multiples of the tooth pitch. The pitch diameter of each sprocket with respect to the number of teeth on it is reduced to make the driving device lightweight, all accelerative, and greater in transmission ratio, and to reduce the difference between the pitch diameters of both gears even with the greater transmission ratio, so that the sprocket teeth may wear less as a result of chain contact.

REFERENCES:
patent: 3661021 (1972-05-01), Ohshita
patent: 3709053 (1973-01-01), Ohshita

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