Planetary gear transmission systems or components – With means to vary drive ratio or disconnect drive – Plural elements selectively braked
Patent
1998-01-30
2000-09-19
Wright, Dirk
Planetary gear transmission systems or components
With means to vary drive ratio or disconnect drive
Plural elements selectively braked
F16H 128
Patent
active
061204099
ABSTRACT:
A variable transmission hub especially for a bicycle featuring a hub housing with spoke ends attached and rotatably mounted on the wheel axel. The conical hub has an internal surface with gears concentrically formed on the internal surface providing a set of concentric gears having a range of ratios. Independent gear assemblies couple each internal gear to a drive cylinder rotatably mounted on the axle and having a drive gear (sprocket) mounted on one end. A cam cylinder is mounted to slide on the axle which, at a selected location along the axle forces a clutch pin slidably positioned in the drive sleeve to engage the selected sun gear. The position of the sliding cam is selected by the user pulling on one end of a cable whose other end is secured to the sliding cam cylinder.
REFERENCES:
patent: 2038799 (1936-04-01), Masson
patent: 3136179 (1964-06-01), Kaiser
patent: 5273501 (1993-12-01), Schievelbusch
patent: 5527230 (1996-06-01), Meier-burkamp
patent: 5556354 (1996-09-01), Meier-burkamp
Samuel Smith Robert
Wright Dirk
LandOfFree
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