in which two members co-operate by means of rings or by means of parts of endless flexible members pressed between the first-mentioned members

Full Title

Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members (control of change-speed or reversing-gearings conveying rotary motion F16H59/00 - F16H63/00) > with members having orbital motion > Gearings providing a continuous range of gear ratios > in which two members co-operate by means of rings or by means of parts of endless flexible members pressed between the first-mentioned members