A clutch using a cone-shaped member that is forced into a cone-shaped depression in the flywheel , or other driving unit, thus locking the two together, although no longer used on cars, the cone clutch finds some applications in small riding tractors, heavy power mowers, etc.
CONE CLUTCH
Meaning of CONE CLUTCH in English
English dictionary of automotive terms. Английский словарь автомобильных терминов. 2012