Planetary gear transmission systems or components – With means to vary drive ratio or disconnect drive – Sun braked
Patent
1991-12-19
1993-12-28
Braun, Leslie A.
Planetary gear transmission systems or components
With means to vary drive ratio or disconnect drive
Sun braked
475296, 475297, 192 6A, F16H 344
Patent
active
052735001
ABSTRACT:
A self-contained change speed apparatus for use on a bicycle having a drive member and a hub body rotatably supported on a fixed shaft, and two planetary gear mechanisms arranged on a drive transmission path extending from the drive member to the hub body. The planetary gear mechanisms include planet gears meshed with sun gears switchable through externally controllable one-way clutches between a state of free rotation relative to the fixed shaft and a state of being locked to the fixed shaft. The controls of the one-way clutches acting on the sun gears are effected by relative positional relations between projections formed on the fixed shaft and control sections formed on a control member shiftable on peripheral surfaces of the fixed shaft. Such controls of the sun gears determine an output line extending through one of the two one-way clutches.
REFERENCES:
patent: 2218838 (1940-10-01), Alspaugh
patent: 4400999 (1983-08-01), Steuer
patent: 4628769 (1986-12-01), Nagano
patent: 4651853 (1987-03-01), Bergles
patent: 4721013 (1988-01-01), Steuer et al.
patent: 4727965 (1988-03-01), Zach et al.
Braun Leslie A.
Shimano Inc.
Wittels Daniel
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