Patent ID: 6086492
Filing Date: 2000-07-11
Classification: F16H,Y10T

Abstract:
An offroad vehicle having a frame rollably supported by at least one wheel, an engine supported by said frame and having an output shaft, said output shaft arranged to drive said at least one wheel supporting said vehicle through a transmission, said transmission having a drive pulley driven by said output shaft and a driven pulley driven by said drive pulley, said drive pulley comprising a fixed sheave and a moveable sheave moveable relative to said fixed sheave, said moveable sheave being moveable between a first position and a second position relative to said fixed pulley such that said drive pulley drives said driven pulley in a high speed relationship when said moveable sheave is in said first position and said drive pulley drives said driven pulley in a low speed relationship when said moveable sheave is in said second position, comprising an air chamber and a vacuum apparatus, said air chamber being defined in part by said moveable sheave and said vacuum apparatus removing air from said chamber to reposition said moveable sheave to said second position when a speed of said engine is reduced.