in which the clutching pressure is produced by springs only

Full Title

Friction clutches (arrangements for synchronisation F16D23/02) > with axially-movable clutching members (similar brakes F16D55/00) > with conical friction surfaces > in which the or each axially-movable member is pressed exclusively against an axially-located member > with means for increasing the effective force between the actuating sleeve or equivalent member and the pressure member > in which the clutching pressure is produced by springs only