Run-flat pneumatic radial tire

Details Run-flat pneumatic radial tire Run-flat pneumatic radial tire

1990-08-09

1992-07-21

Ball, Michael W.

Resilient tires and wheels

Tires, resilient

Pneumatic tire or inner tube

152539, 152550, 152549, 152555, B60C 902, B60C 1700

Patent

active

051314452

ABSTRACT:
A run-flat pneumatic radial tire having an aspect ratio of up to 50%, which includes a reinforcing liner layer mode of a rubber having a complex modulus at 20.degree. C. E*.sub.20, a ratio of a complex modulus at 100.degree. C. to the complex modulus at 20.degree. C., a 100% modulus and a loss tangent (tan .delta.) at 100.degree. C. which satisfy certain specified numeric values. The liner has a crescent sectional shape and is disposed in sidewall portions of a carcass layer with its end portions overlapping the end portions of a belt layer and a bead filler having a specified hardness and height h from a wheel rim base. The carcass layer consists of an inner carcass layer turned up around the bead core from inside to outside the tire so that its end portion is positioned at a position higher than the height h of the bead filler and an outer carcass layer having an end portion disposed axially outward of the bead core.

REFERENCES:
patent: 3542108 (1970-11-01), Rye
patent: 3954131 (1976-05-01), Hoshino et al.
patent: 4162698 (1979-07-01), Merli et al.
patent: 4193437 (1980-03-01), Powell
patent: 4261405 (1981-04-01), Yamauchi et al.
patent: 4917164 (1990-04-01), Ushikubo et al.

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