Heavy duty pneumatic radial tires whose belt includes a pair of narrow-width auxiliary protective strips
AssigneeBridgestone Corporation
InventorsMinoru Nakano, Akihito Goto, Yoichi Nakamura
Life of this patent
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Abstract
A heavy duty pneumatic radial tire running on rough road at high speed and having plural belt layers of steel cords comprises at least a pair of auxiliary protective strips superimposed on the belt layer so as to cover both end portions of the belt layer and protrude outward from the end portion, wherein cords of the auxiliary protective strips are inclined at an angle of 25.degree.-25.degree. with respect to the circumferential direction of the tire and are the same direction as in the cord direction of the belt layer supporting the auxiliary protective strips.
Claims12
A heavy duty pneumatic radial tire comprising:
- a radial carcass ply of cords extending between a pair of bead cores in substantially a radial direction of the tire and turning up around respective bead cores, plural belt layers comprising two main belt layers each containing substantially inextensible steel cords arranged outside the radial carcass ply and a protect belt layer containing high elongation steel cords arranged outside the main belt layers, and a pair of narrow-width auxiliary protective strips having free ends of cords at both side ends in axial direction to cover the belt end and protrude beyond the belt end outward in the widthwise direction, cords of said protective strips having an inclination angle of 25.degree.-50.degree. with respect to the circumferential direction of the tire and being the same direction as in the cord direction of the belt layer supporting the auxiliary protective strip.
Dependencies are inferred from the claim text.