We have only been able to find one example of devices that even claim to be an infinitely variable transmissions, the VMT Universal Drive. This drive is based on a completely different theory of operation. Unfortunately the available descriptions of how it works are insufficient to determine adequately the details of operation. However some idea of how it compares to the Rolowitz Drive can be gleaned from comparing pictures of the two devices. The VMT Drive is at the top, under it is a 3 dimensional model of our design.
The two pictures are not shown to scale. The illustration is intended to show the difference in complexity of the two mechanisms. As a direct size comparison, below is our design rendered at approximately the same scale as the VMT Drive pictured.
The advantages of our design can readily be seen.