Chainless transmission mechanism for a bicycle

Details Chainless transmission mechanism for a bicycle Chainless transmission mechanism for a bicycle

1997-03-25

1999-10-19

Dickson, Paul N.

Land vehicles

Wheeled

Occupant propelled type

280260, 280274, 74417, B62M 102

Patent

active

059675373

ABSTRACT:
A chainless transmission mechanism for a bicycle, including a casing mounted in a bottom bracket to hold a bottom bracket bearing axle, permitting the bottom bracket bearing axle to be driven by pedals to turn a rear-wheel hub through a transmission shaft and two transmission gear sets, wherein the bottom bracket has a first end, a second end, and a notch at the second end thereof; the casing is a cylindrical shell inserted through the bottom bracket, having a first end secured to the bottom bracket outside the first end of the bottom bracket by a clamp, a second end disposed outside the second end of the bottom bracket, and a hollow projecting block raised from its second end and forced into engagement with the notch at the second end of the bottom bracket.

REFERENCES:
patent: 3861715 (1975-01-01), Mendoza
patent: 4943077 (1990-07-01), Lin et al.
patent: 5299819 (1994-04-01), Leu
patent: 5316327 (1994-05-01), Bell
patent: 5482306 (1996-01-01), Hsu
patent: 5852948 (1998-12-01), Chang

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