Pneumatic tire including belt and circumferential ribs

Details Pneumatic tire including belt and circumferential ribs Pneumatic tire including belt and circumferential ribs

B - Operations, Transporting

60

C

B60C 3/00 (2006.01) B60C 9/28 (2006.01) B60C 11/00 (2006.01) B60C 11/01 (2006.01) B60C 11/04 (2006.01)

Patent

CA 2294418

The present invention provides a tire (T) comprising a tread portion having a tread design pattern including circumferentially continuous ribs: lateral ribs (1) and other ribs (2). The tread portion is reinforced by a carcass having at least a ply (5), and by a belt having at least two working plies (61, 62). The working plies (61, 62) extend transversely beneath all the ribs, and extend beyond a limit line (7). The thickness (Ti) of the tread between the radially innermost part of the carcass ply (5) and the radially external surface (10) does not depart from the thickness (Tc) at the middle point by more than 10 %. The tire tread portion is molded so that the radially external surface of the lateral and other ribs defines a transverse profile that is substantially flat.

La présente invention concerne un pneu (T) comprenant une portion de bande de roulement dont le dessin présente sur sa circonférence des nervures continues, latérales (1) et autres (2). La portion de bande de roulement est renforcée par une carcasse possédant au moins une nappe (5), et par une ceinture possédant au moins deux nappes de travail (61, 62) s'étendant transversalement en dessous de toutes les nervures et s'étendant au-delà d'une ligne limite (7). L'épaisseur (Ti) de la bande de roulement entre la partie radiale située la plus à l'intérieur de la nappe (5) de la carcasse et la surface radiale extérieure (10) ne s'écarte pas de plus de 10 % de l'épaisseur (Tc) au niveau du point médian. La portion de bande de roulement du pneu est moulée de façon que la surface radiale extérieure des nervures latérales et autres détermine un profil transversal sensiblement plat.

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