Variable gear ratio chain drive system for bicycles

Variable loading roller

Variable pulley part for a drive acting through a tension medium

Variable ratio drive system including a compact variable diamete

Variable speed drive

Variable speed drive

Variable speed drive

Variable speed drive

Variable speed drive clutch

Variable speed drive for a bicycle

Variable speed drive system for carding machine

Variable speed flat belt transmission

Variable speed friction transmission

Variable speed pulley

Variable speed secondary pulley

Variable speed sheave

Variable speed transmission and actuator therefor

Variable speed transmission systems

Variable speed transmission systems

Variable transmission drive pulley assembly with selective drive