WULSTKERN MIT EINER KLAMMER, REIFEN MIT DEMSELBEN,UND VERFAHREN ZUR HERSTELLUNG DESSELBEN

摘要

An annular clamp or gripping means arranged around a bead core ofa tire bead, made of a shape-memory material is disclosed as well as a tire incorporating such a clamp or gripping means. The annular clamp or gripping means is deformable by elongation at ambient temperature and, at a temperature above ambient, contracts to a previously memorized shape, maintains a force of contraction in the passage from the higher temperature to the lower one, down to the ambient temperature. The clamp or gripping means, preferably an annular metal strap, compacts the various elements of a bead core over a specific temperature range, particularly during vulcanization if a tire in operation of the same tire, thus ensuring a tight gripping force by the bead cores in extreme conditions. A method of manufacturing an annular clamp or gripping means and of making a tire with such a clamp or gripping means is also described.