Heavy duty pneumatic radial tires

Details Heavy duty pneumatic radial tires Heavy duty pneumatic radial tires

1984-02-16

1985-09-17

Boland, Lois E.

Resilient tires and wheels

Tires, resilient

Pneumatic tire or inner tube

152541, 152543, 152546, 152547, 152554, B60C 908, B60C 1506

Patent

active

045414670

ABSTRACT:
A heavy duty pneumatic radial tire is disclosed, which comprises a tread portion, a pair of side portions, a pair of bead portions each reinforced with a bead ring, a radial carcass ply, a metal cord reinforcing layer and a composite rubber filler. In this tire, the carcass ply is a rubberized layer of aromatic polyamide fiber cords and a tip of its turnup portion terminates at a position lower than an upper end of a rim flange when the tire is mounted on a rim. In the metal cord reinforcing layer, one end facing the turnup portion terminates over the tip of the turnup portion and the other end facing the carcass ply extends toward the side portion over a position corresponding to the above-mentioned one end facing the turnup portion. The rubber filler consists of a hard rubber stock and a soft rubber stock, wherein the hard rubber stock extends above the bead ring along the carcass ply over a position corresponding to the end of the reinforcing layer facing the carcass ply, and the soft rubber stock extends toward the side portion over the hard rubber stock between the hard rubber stock and the reinforcing layer facing the turnup portion and the lower end thereof locates between the hard rubber stock and the turnup portion in a wedge shape.

REFERENCES:
patent: 3888292 (1975-06-01), Menell et al.
patent: 4046183 (1977-09-01), Takahashi et al.
patent: 4085787 (1978-04-01), Maiocchi
patent: 4086948 (1978-05-01), Suzuki et al.
patent: 4209050 (1980-06-01), Yoshida et al.
patent: 4250939 (1981-02-01), Shibata et al.

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