Pneumatic radial tires with circumferential cord belt layer having specified cord twisting structure
AssigneeBridgestone Corporation
InventorsYoshihide Kohno, Eiji Yamanaka, Toshinobu Kobayashi, Takayuki Sato
Life of this patent
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Abstract
A pneumatic radial tire for passenger car comprises a circumferential belt layer in addition to a slant belt layer, in which specified PET, nylon, PEN or vinylon fiber cords or steel cords are used in the circumferential belt layer.
Claims9
A pneumatic radial tire comprising a carcass toroidally extending between at least a pair of bead cores and a belt superimposed on a crown portion of the carcass and comprised of a single slant belt layer containing a plurality of cords or filaments arranged at a given inclination angle with respect to an equatorial plane of the tire and at least one circumferential belt layer laminated on the slant belt layer and containing a plurality of cords arranged substantially in parallel to the equatorial plane, wherein each cord used in the at least one circumferential belt layer is a steel cord having a modulus of elasticity of not less than 3000 kgf/mm2 and a twisting structure of 1×N or 1+N in which is the number of twisted steel filaments.
Dependencies are inferred from the claim text.