Pneumatic radial tire having highly durable bead structure

Details Pneumatic radial tire having highly durable bead structure Pneumatic radial tire having highly durable bead structure

1982-06-22

1984-09-18

Boland, Lois E.

Resilient tires and wheels

Tires, resilient

Patches

152354R, 152362R, 152362CS, 152374, B60C 1506, B60C 908

Patent

active

044718284

ABSTRACT:
A pneumatic radial tire having highly durable bead structure is disclosed. One or more carcass ply layers of steel cords are turned up around a bead core from the inside to the outside. A reinforcing strip of steel cords is positioned outwardly adjacent to and without extending radially outwardly beyond the turn-ups of carcass plies. A bead filler of approximately triangular sectional shape is disposed at the region enclosed by the carcass plies and the turn-ups of the carcass plies. The bead filler comprises high hardness rubber stock and medium hardness rubber stock. A cap of organic textile cord fabric covers an upper end of the carcass plies. A fin-shaped rubber buffer having a hardness lower than that of the medium hardness rubber stock by 3.degree. to 20.degree. is disposed radially outwardly of the capped end and axially outwardly adjacent to the medium hardness rubber stock. A reinforcing strip of organic textile cords may be further disposed outwardly adjacent to the reinforcing strip of steel cords.

REFERENCES:
patent: 3392773 (1968-07-01), Warren et al.
patent: 3612137 (1971-10-01), Guyot
patent: 3895666 (1975-07-01), Inoue
patent: 4086948 (1978-05-01), Suzuki et al.
patent: 4215737 (1980-08-01), Motomura et al.
patent: 4387759 (1983-06-01), Obata et al.

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