shaped as linked or separately-pivoted segments

Full Title

Friction clutches (arrangements for synchronisation F16D23/02) > with outwardly-movable clutching members co-operating with the inner surface of a drum or the like (F16D13/02, F16D13/06, F16D13/12 take precedence; similar brakes F16D51/00) > shaped as linked or separately-pivoted segments