Tyre with additional ring

B - Operations – Transporting – 60 – C

Patent

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Details

B60C 13/00 (2006.01) B60C 15/024 (2006.01)

Patent

CA 2434807

The invention concerns a tyre P comprising at least two beads B assembled to a running tread (7) via two sidewalls (5), at least the first bead B having a seat (12B) sloping outwards, and a carcass reinforcement (1), formed with at least a belt (1A, 1B), anchored in said first bead B to at least an annular anchoring element (2), and whereof the meridian profile has a constant curvature direction in the first bead B and the sidewall (5) extending it radially, and a tangent TT' forming with the axis of rotation an angle¿ ?.phi.¿2? opening outwards not more than 70·. The invention is characterised in that said sidewall (5) comprises an additional inextensible sidewall ring (4) located axially inside at least a carcass belt (1A), called axially outer belt, an extruded profile (6) of rubber mixture being radially located between the annular bead anchoring element (2) and the additional sidewall ring (4), and axially located inside the axially outer belt (1A).

Pneumatique P comprenant au moins deux bourrelets B réunis à une bande de roulement (7) par l'intermédiaire de deux flancs (5), au moins le premier bourrelet B ayant un siège (12B) incliné vers l'extérieur, et une armature de carcasse (1), formée d'au moins une nappe (1A, 1B), ancrée dans ledit premier bourrelet B à au moins un élément annulaire d'ancrage (2), et dont le profil méridien a un sens de courbure constant dans le premier bourrelet B et le flanc (5) le prolongeant radicalement, et une tangente TT' faisant avec l'axe de rotation un angle .phi.¿2? ouvert vers l'extérieur au plus égal à 70·, caractérisé an ce que ledit flanc (5) comprend un anneau additionnel (4) de flanc inextensible situé axialement à l'intérieur d'au moins une nappe d'armature de carcasse (1A), nappe dite axialement extérieure, un profilé (6) de mélange caoutchouteux étant radialement situé entre l'élément annulaire d'ancrage (2) de bourrelet et l'anneau additionnel (4) de flanc, et axialement situé à l'intérieur de la nappe axialement extérieure (1A).

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