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
1989-06-13
1991-02-05
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
474110, 474138, F16H 1100, F16H 708
Patent
active
049901230
ABSTRACT:
A continuously variable transmission system having a fixed variable diameter pulley connected by a drive belt to at least one other pulley. A tensioner pulley maintains the tension on the drive belt within predetermined limits as the effective diameter of the variable diameter pulley changes. The effective diameter of the variable diameter pulley is determined by a balance between a resilient force biasing a plurality of belt engaging members in a predetermined direction and a radial force acting on the plurality of belt engaging members in the opposite direction. In a first embodiment, the resilient force biases the plurality of belt engaging members outwardly and the radial forces are generated by displacing the tensioner pulley to increase the tension on the drive belt. In an alternate embodiment, the plurality of belt engaging members are biased inwardly by a resilient force and are displaced outwardly by centrifugal forces.
REFERENCES:
patent: 3956944 (1976-05-01), Tompkins
patent: 4283181 (1981-08-01), Sproul
patent: 4500304 (1985-02-01), Foster
patent: 4714452 (1987-12-01), Kumm et al.
Bui Thuy M.
GKN Automotive Inc.
VanOphem Remy J.
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