Endless belt power transmission systems or components – Control for variable input to output speed-ratio – Including separate belt on each of coaxial pulleys...
Patent
1992-05-14
1994-03-08
Britts, Ramon S.
Endless belt power transmission systems or components
Control for variable input to output speed-ratio
Including separate belt on each of coaxial pulleys...
474 78, 474 85, 474116, 474160, 474164, 745942, F16H 900
Patent
active
052922863
ABSTRACT:
A bicycle power train assembly includes a crank axle, a primary driving sprocket cluster mounted on one end of the crank axle, a rear wheel axle, a primary driven sprocket cluster mounted on one end of the rear wheel axle, a primary drive chain trained between the primary driving and driven sprocket clusters, a secondary driving sprocket mounted on the other end of the crank axle and rotating with the crank axle, a secondary driven sprocket mounted on the other end of the rear wheel axle, a secondary drive chain trained between the secondary driving and driven sprockets, an idle sprocket rotatably mounted on the rear wheel axle, and a ratchet clutch disposed between the rear wheel axle and the secondary driven sprocket to disengage the secondary driven sprocket from the rear wheel axle when the primary drive chain is trained between the primary driving and driven sprocket clusters and to engage the secondary driven sprocket and the rear wheel axle so as to drive rotatably the rear wheel axle when the primary drive chain is trained between the primary driving sprocket cluster and the idle sprocket. The secondary driving sprocket should be smaller than a smallest sprocket of the primary driving sprocket cluster, and the secondary driven sprocket should be larger than a largest sprocket of the primary driven sprocket cluster.
REFERENCES:
patent: 1264231 (1918-04-01), Wagner
patent: 2277727 (1942-03-01), Swanson
patent: 2385892 (1945-10-01), Swanson
patent: 3862579 (1975-01-01), Roberts
patent: 3913944 (1975-10-01), Blow
patent: 4173154 (1979-11-01), Sawmiller
patent: 4305599 (1981-12-01), Houston
patent: 4398740 (1983-08-01), Clem
patent: 4666173 (1987-05-01), Graham
patent: 5121654 (1992-06-01), Fasce
Britts Ramon S.
Schoeppel Roger J.
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