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

1982-04-21

1984-05-08

Powell, William A.

Resilient tires and wheels

Tires, resilient

Patches

152357R, 152359, 152362R, B60C 1506, B60C 900, B60C 1500

Patent

active

044469047

ABSTRACT:
A pneumatic radial tire having highly durable bead structure is disclosed. A carcass ply layer of organic textile cords is turned up around a bead core from the inside to the outside. A reinforcing strip of steel cords is positioned outwardly adjacent to the turn-ups of carcass plies. An organic textile cord fabric is disposed outwardly adjacent to the reinforcing strip of steel cords. A bead filler of approximately triangular sectional shape is disposed at the region enclosed by the carcass plies, the turn-ups of the carcass plies and the reinforcing strip of steel cords. 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 reinforcing strip of steel cords. 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.

REFERENCES:
patent: 3895666 (1975-07-01), Inoue
patent: 3902542 (1975-09-01), Imamura et al.
patent: 3921693 (1975-11-01), Suzuki et al.
patent: 4046183 (1977-09-01), Takahashi et al.
patent: 4185677 (1980-01-01), Motomura et al.
patent: 4215737 (1980-08-01), Motomura et al.
patent: 4227563 (1980-10-01), Grosch et al.
patent: 4289184 (1981-09-01), Motomura et al.
patent: 4319621 (1981-03-01), Motomura et al.

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