US Patent 9057432 Continuously variable transmission drive pulley

A drive pulley for a continuously variable transmission has a fixed sheave, a movable sheave, and a biasing member. At least one arm is pivotally connected about a first axis to one of the movable sheave and a portion of the drive pulley axially and rotationally fixed to the fixed sheave. The arm has a ramp surface. At least one slider is pivotally connected about a second axis to the other one of the movable sheave and the portion of the drive pulley. The at least one slider has at least three slider surfaces. At least one of the at least three slider surfaces is adapted to contact the ramp surface of the at least one arm.