Automatic speed change device for bicycle gearbox

Details Automatic speed change device for bicycle gearbox Automatic speed change device for bicycle gearbox

2006-05-02

2006-05-02

DePumpo, Daniel G. (Department: 3611)

Land vehicles

Wheeled

Occupant propelled type

C474S070000

Reexamination Certificate

active

07036836

ABSTRACT:
A structure of an automatic speed change device for bicycle gearbox is disclosed in this present invention. The above-mentioned design can be applied to a bicycle with a rear wheel speed change device. According to this invention, the automatic speed change device is able to control the allotting device of the rear wheel speed change device to transfer the chain into suitable gear by the treading rat of the user. This design can simplify the manual gear shifting process in the prior art for controlling the rear wheel speed change device. Therefore, this invention can make riding bicycle more easily and widely for all age.

REFERENCES:
patent: 3613466 (1971-10-01), Houghton
patent: 3929025 (1975-12-01), Perry
patent: 3939932 (1976-02-01), Rosen
patent: 4693700 (1987-09-01), Chappell
patent: 5407396 (1995-04-01), Gilbert
patent: 5618240 (1997-04-01), Gilbert
patent: 5758735 (1998-06-01), MacCready et al.
patent: 6159118 (2000-12-01), Campbell

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