TYRE COMPRISING A PAIR OF FLEXIBLE BEAD CORES

The invention relates to a tyre comprising a pair of flexible bead cores (50) and having a reduced weight. Inside each bead, the bead core (51) has the shape of a closed circumferential ring, and secures the bead of the tyre (1) onto the wheel rim (100) and comprises a first part consisting of a fir...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	REYNAL DE ST-MICHEL, Remi, REIX, Olivier, MORIVAL, Sylvain, AHOUANTO, Michel, CLERGEAT, Jean-mathieu
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	DEVICES OR ARRANGEMENTS RELATED TO TYRES PERFORMING OPERATIONS REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIESIN GENERAL TRANSPORTING TYRE CHANGING OR REPAIRING TYRE INFLATION VEHICLE TYRES VEHICLES IN GENERAL
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Beschreibung
Zusammenfassung:	The invention relates to a tyre comprising a pair of flexible bead cores (50) and having a reduced weight. Inside each bead, the bead core (51) has the shape of a closed circumferential ring, and secures the bead of the tyre (1) onto the wheel rim (100) and comprises a first part consisting of a first material M1 taking the form of textile cords (560), said first part engaging with a second part of the bead core consisting of a second, reinforcement material M2. The tensile stiffness of the bead core (51) is between 4.5 x 105 N/m and 1.8 x 106 N/m; the circumferential bending stiffness of the bead core (51), Kf, is no less than Kr * (1000D / (1625.4))3, where D is the diameter of the wheel receiving the tyre as measured at the seat (110) of the wheel rim (100) in metres, and where Kr is equal to 2.10-2 Nm2; and the elastic elongation of the bead core (51) is no less than 2%.