with a helical band or equivalent member, which may be built up from linked parts, with more than one turn embracing a drum or the like, with or without an additional clutch actuating the end of the band (F16D13/02 takes precedence; ; similar free-wheel clutches F16D41/20; similar brakes F16D49/02)

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Friction clutches (arrangements for synchronisation F16D23/02) > with a helical band or equivalent member, which may be built up from linked parts, with more than one turn embracing a drum or the like, with or without an additional clutch actuating the end of the band (F16D13/02 takes precedence; ; similar free-wheel clutches F16D41/20; similar brakes F16D49/02)