Endless belt power transmission systems or components – Control for variable input to output speed-ratio – Including mechanism for shifting belt axially on spaced...
Patent
1989-07-21
1990-05-29
Bui, Thuy M.
Endless belt power transmission systems or components
Control for variable input to output speed-ratio
Including mechanism for shifting belt axially on spaced...
474101, 474111, F16H 900
Patent
active
049292188
ABSTRACT:
A continuously variable transmission in which a chain is capable of changing width in order to be accommodated on fixed conical pulley surfaces at desired varying radii on the pulleys, commensurate with desired gear ratio. The chain is comprised of individual links whose widths can be varied and locked at different widths. The links are locked into position when the chain is bent in one direction and become unlocked when the chain is bent in the other direction. Idle gears are provided to introduce the chain to the pulleys tangential to arcs about the pulley and at desired radius from the pulley center. The idler gears bend the chain in appropriate directions to unlock or lock the chain links at desired widths depending upon the location where the links engage the pulleys.
REFERENCES:
patent: 3869138 (1975-03-01), Allison
patent: 3964331 (1976-06-01), Oldfield
patent: 4683962 (1987-08-01), True
Popular Mechanics, Jun. 1984, p. 70 and following: "Get Ready for a New Kind of Automatic Transmission"; Michael Lamm.
Popular Science, date unknown, p. 62: "Japanese-Style Continuously Variable Transmission"; Walter Miller.
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