Endless belt power transmission systems or components – Pulley with expansible rim means or pulleys with alternately... – Structure for variably adjusting radius of rim section
Patent
1990-03-27
1990-11-27
Bui, Thuy M.
Endless belt power transmission systems or components
Pulley with expansible rim means or pulleys with alternately...
Structure for variably adjusting radius of rim section
474136, F16H 5554, F16H 708
Patent
active
049732897
ABSTRACT:
Drive mechanism, particularly for use with a bicycle, of the type having variable diameter drive and driven members connected by an endless belt which engages adjustable segments on the members. Through a control members the drive ratio can be adjusted to multiple, discrete settings. Belt wrap is maintained between the belt and the drive and driven members at all settings by two idlers which are independently supported for movement. A locking rail is used to release and secure the segments on the members and a split clutch is used with the driven member for easy rear wheel removal. The mechanism has a lost motion device to accommodate forward and rearward pedaling without harming the drive mechanism. The drive mechanism is modular in construction so it can be used with frames of varying sizes and the drive mechanism can be quickly removed from or assembled to the bicycle frame when replacement is desired.
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Bui Thuy M.
Hamlin Transmission Corporation
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