Patent ID: 6346056
Filing Date: 2002-02-12
Classification: F16H

Abstract:
An improved flyweight for use in a CVT,the flyweight having a head symmetrically surrounding a pivot with a rotational axis passing through center of said pivot, an arm extending away from said pivot, having a cam surface, and having a center-of-mass (COM), and a plumb line dropped from said center of said pivot of said flyweight when said flyweight is statically suspended by said pivot, where angles measured from said plumb line start at zero degrees for directions along said plumb line in the direction of said arm and increase in the direction of said cam surface; and four quadrants, in a plane normal to said pivot axis, numbered from one to four increasing counterclockwise from a line segment normal to said plumb line and that extends from said pivot center on the side of said flyweight having said cam surface, with counterclockwise rotating from said line segment towards said head; and said flyweight being rotatably attached to the CVT by said pivot such that rotationally induced forces cause rotation of said cam surface so as to effect changes in the shift ratio of the CVT, where the improvement comprises: one or more mass concentrations supplementing said flyweight and having their COM more than 10 millimeters distant from said pivot center in said first and second quadrants.