FIELD: mechanical engineering. SUBSTANCE: clamping ring is made from semirigid wire wound in at least one turn whose one end is provided with catch passing across plane of turn and second end is bent outside forming tightener passing through the same plane. Tightener includes fastening bend forming shoulder passing in way of center of turn and bent for preliminary fastening located between end of tightener where it is connected with turn and its fastening bend; band of preliminary fastening is similar to fastening bend. EFFECT: enhanced reliability of clamping ring. 9 cl, 6 dwg
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