Friction gear transmission systems or components – Friction gear is ball – Variable ratio
Patent
1992-08-14
1993-08-17
Herrmann, Allan D.
Friction gear transmission systems or components
Friction gear is ball
Variable ratio
476 47, 476 61, 475189, 475196, 280236, 280238, F16H 1702
Patent
active
052364038
ABSTRACT:
A driving hub for a vehicle, particularly a bicycle, comprising a hub axle, a hub sleeve enclosing the hub axle, a driver, a friction gear, a coupling arrangement as well as a control arrangement for infinitely variable adjustment of the transmission ratio of the friction gear, is provided with a ball friction gear comprising a driving ring and a driven ring, a plurality of friction balls frictionally connecting the rings to one another, a friction ball carrier rotationally rigidly connected to the hub axle and a control arrangement for jointly pivoting of the ball spindles, said driving ring and said driven ring being in frictional contact with the friction balls on the respective side of the friction balls which faces away from the axis. A driving hub of this kind is of simple design, can be produced inexpensively and exhibits a high degree of efficiency.
REFERENCES:
patent: 2469653 (1949-05-01), Kopp
patent: 2675713 (1954-04-01), Acker
patent: 2931234 (1960-04-01), Hayward
patent: 2931235 (1960-04-01), Hayward
patent: 4735430 (1988-04-01), Tomkinson et al.
F. R. Whitt et al., "Bicycling Science", MIT Press, 1988, p. 282.
Fichtel & Sachs AG
Herrmann Allan D.
Trousdell William O.
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