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US 4,258,775 AGranted
Pneumatic radial tire with zero degree damper layers between belt plies
AssigneeBridgestone Tire Company Limited
InventorMasao Samoto
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AssigneeBridgestone Tire Company Limited
InventorMasao Samoto
Estimating the term…
A pneumatic radial tire including a tread, a pair of sidewalls, bead portions having bead wires therein and fiber cord radial carcass extending between the bead portions through the sidewalls and the tread, and a belt layer of plural metal cord layers above the carcass in the tread, the metal cords lying in radial planes of the tire. At least one rubber coated damper layer is positioned between belt plies in ends of the belt layer with cords arranged in directions substantially 90.degree. to the radial planes or 0.degree. to circumferential planes. The tire according to the invention further comprises high elastomeric rubber fillers having a 20% extension modulus of at least 30 kg/cm.sup.2 extending from the bead wires to the center zones of the sidewalls. The tire according to the invention is capable of preventing "standing waves" to thereby improve the durability of the tire for high speed travelling.
A pneumatic radial tire including a central annular tread, a pair of sidewalls extending from ends of said tread and bead portions including bead wires, and further including a fiber cord radial carcass extending between said bead portions and having ends folded about said bead portions and affixed thereat, and a belt layer having a plurality of metal cord layers above said carcass in said tread, said metal cord layers having cords at angles 65.degree.-80.degree. to radial planes including a rotating axis of the tire and wherein said cords from layer to layer are crossed to each other, said tire comprising at least one pair of rubber coated damper layers positioned between ends of belt metal cord layers in said belt layer and axially spaced apart and having cords arranged in directions substantially 90.degree. to said radial planes, an end of said damper layer extending somewhat beyond the end of said belt layer.
A pneumatic radial tire including a central annular tread, a pair of sidewalls extending from ends of said tread and bead portions including bead wires, and further including a fiber cord radial carcass extending between said bead portions and having ends folded about said bead portions and affixed thereat, and a belt layer having a plurality of metal cord layers above said carcass in said tread, said metal cord layers having cords at angles of 65.degree.-80.degree. to radial planes including a rotating axis of the tire and wherein said cords from layer to layer are crossed to each other, said tire comprising at least one pair of rubber coated damper layers positioned between ends of said belt metal cord layers and axially spaced apart and having cords arranged in directions substantially 90.degree. to said radial planes, an end of said damper layer extending somewhat beyond the end of said belt layer, and high modulus elastomeric rubber fillers tapered in section radially outwardly having a 20% extendion modulus of at least 30 kg/cm.sup.2 extending from in proximities of said bead wires to center zones of said sidewalls.
Dependencies are inferred from the claim text.