YES NOPE9 wrote: > http://telaminc.com/page-title%207/cvtivt.htm=20 >=20 > I have looked at the video of this device and it is either misleading > or I am missing something. At first I thought maybe it was using a > harmonic drive scheme but now I am not so sure. Does the green ring > with 3 holes have to move parallel to the green shaft to change the > ratio ? Is there a solid shaft running through the blue gears to two > smaller orange gears that mesh with single larger orange gear ? AIUI: The green shaft turns. The blue cones are connected to the green shaft and turn inside that big green ring with the teeth inside (which does not turn). The horizontal position of the green ring determines the rotational speed of the blue cones, because their effective tooth number changes with the position. The rotation of the blue cones is transmitted to the orange output shaft through some yellow (?) gears inside that orange output gear. So, yes, IMO the green ring needs to move horizontal (parallel to the shafts) to change the ratio. > Is this real or a scam ? Looks real to me, but a bad drawing/animation to demonstrate the function :) It seems that the special trick here is that the blue cones don't have teeth all the way around, but the non-tooth areas are distributed in a way that always at least one blue tooth has a grip against the green ring. Not sure why John says they are not gears/teeth...=20 Gerhard --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .