Heavy duty pneumatic tire having defined tire enlargement with i

Details Heavy duty pneumatic tire having defined tire enlargement with i Heavy duty pneumatic tire having defined tire enlargement with i

1988-12-27

1990-10-16

Ball, Michael W.

Resilient tires and wheels

Tires, resilient

Pneumatic tire or inner tube

152526, B60C 300

Patent

active

049628046

ABSTRACT:
A heavy duty pneumatic radial tire including a pair of bead portions, a carcass consisting of one steel cord layer and extending between the bead portions, and a tread portion arranged radially outward of a crown portion of the carcass. A normal rim on which the tire is mounted has a bead base at an angle of approximately 5.degree. relative to a rotating axis of the tire and engaging the bead portions of the tire. During filling the tire with inner pressure from 7% to 100% of a determined maximum inner pressure of the tire, a ratio A/B of an enlargement amount A of a shoulder in radial and outward directions to an enlargement amount B of the bead portion in axial and outward directions is within 0.35-0.8, preferably 0.4-0.65, where a radial and outward displacement of a shoulder positions J on the shoulder spaced by 10 mm from each end of said tread toward an equatorial plane of the tire is taken as the enlargement amount A of the shoulder in the radial and outward directions, and an axial outward displacement of a bead position K on the bead portion at a height of 27% of a tire sectional height H from a bead heel is taken as the enlargement amount B of the bead portion in axial outward directions.

REFERENCES:
patent: 4328850 (1982-05-01), Uemura
patent: 4345634 (1982-08-01), Giron
patent: 4513802 (1985-04-01), Togashi et al.
patent: 4609023 (1986-09-01), Loser

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