Continuously variable speed transmission
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United States of America Patent
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Mar 22, 1994
Grant Date -
N/A
app pub date -
Oct 19, 1992
filing date -
Oct 19, 1991
priority date (Note) -
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Abstract
A continuously variable speed transmission with first and second adjustable sheaves and an endless flexible element which is trained over the sheaves. A torque sensor is installed between a prime mover and the shaft for the first sheave to determine the axial position of the axially movable flange of the first sheave in dependency on the transmitted torque and the selected transmission ratio. The torque sensor employs an annulus of spherical rolling elements between the surfaces of two ramps one of which is movable axially of the shaft for the first sheave to initiate controlled radial and/or axial movements of the rolling elements. The surfaces of the ramps generate torque- and transmission ratio-dependent forces.
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