Heavy duty radial tire with defined carcass turnup curvature

Details Heavy duty radial tire with defined carcass turnup curvature Heavy duty radial tire with defined carcass turnup curvature

1991-05-03

1993-02-16

Ball, Michael W.

Resilient tires and wheels

Tires, resilient

Pneumatic tire or inner tube

152546, 152552, B60C 1500

Patent

active

051867745

ABSTRACT:
A heavy duty radial tire and rim assembly exhibiting improved bead durability, wherein the bottom face of the bead is composed of an axially inner face Si and an axially outer face So each tapered axially inward to decrease the diameter of the bottom face, the taper in the inner face Si is greater than that of the outer face So, the boundary between the inner face Si and the outer face So is located axially inward of the center of gravity of the bead core, and in the condition that the tire is mounted on a regular rim and inflated to a regular pressure, the axial distance X of the axially inner edge Q2 of the bead core from a bead heel Q1 defined as an intersection between a rim base line B and an extending line of the inner surface of a rim flange of the rim is not less than 80% and not more than 105% of the height HR of the radially outer edge Q3 of the rim flange from the rim base line; and the radial distance Y of the radially outer edge Q4 of the bead core measured radially inwardly from the radially outer edge Q3 of the rim flange is not less than 0% and not more than 30% of the height HR of the rim flange from the rim base line.

REFERENCES:
patent: 3419059 (1965-05-01), Bridge, Jr.
patent: 3548912 (1970-12-01), Rye
patent: 3949800 (1976-04-01), Lejeune
patent: 4207940 (1980-06-01), Roger
patent: 4342353 (1982-08-01), Tamura et al.
patent: 4351382 (1982-10-01), Corner et al.
patent: 4554960 (1985-11-01), Pompier
patent: 4726408 (1988-02-01), Alie et al.
patent: 4872497 (1989-10-01), Hanada et al.
U.S. patent application Ser. No. 07/291,228, claims 6-9.

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