Patent Number: 6,305,450

Title: Tire with specified belt profile in the absence of load and inflating pressure

Abstract: A tire (1) for motor-vehicle wheels comprises a tread band (10) and a belt structure (6), the tread band being molded with a raised pattern having a circumferential groove (11). In the absence of load and inflating pressure, the tire is characterized in that the belt structure in a cross-section of the tire has an axial profile comprising three distinct portions, first (14) and second (15) side portions and one central portion (16) interposed between the side portions. The side portions are concave at a radially internal position, in which the concavity is defined for each portion by a respective center and a respective radius of curvature. The central portion is concave at a radially external position where the concavity center of the central portion lies in the center line plane of the circumferential groove, in which the depth of the radially external concavity is canceled under the effect of the normal inflating pressure of the tire.

Inventors: Guermandi; Romano (Milan, IT)

Assignee: Pirelli Coordinamento Pneumatici S.p.A.

International Classification: B60C 11/04 (20060101); B60C 11/24 (20060101); B60C 11/13 (20060101); B60C 3/00 (20060101); B60C 3/04 (20060101); B60C 003/00 (); B60C 003/06 (); B60C 009/18 (); B60C 011/00 (); B60C 011/24 ()

Expiration Date: 10/23/2018