Pneumatic radial tire with a two part chafer

Details Pneumatic radial tire with a two part chafer Pneumatic radial tire with a two part chafer

1998-03-11

2000-10-31

Ball, Michael W.

Resilient tires and wheels

Tires, resilient

Pneumatic tire or inner tube

152539, 152547, B60C 1506

Patent

active

061387339

ABSTRACT:
A bead portion durability of a pneumatic radial tire for large-size vehicle is improved by disposing a combination of a first protection rubber layer A having a 100% modulus of 25-40 kgf/cm.sup.2 and a second protection rubber layer B having a 100% modulus of 30-50 kgf/cm.sup.2 in given places of the bead portion so as to locate an inner end of the first protection rubber layer A in the radial direction of the tire between an outer end of a curved face of the bead heel in the radial direction and an end of a curved face of a rim flange and locate an outer end of the second protection rubber layer B in the radial direction of the tire at such a position outward in the radial direction of the tire that an inclination angle defined between a line segment connecting this end to a curvature center of the curved face of the rim flange and a phantom line passing through the curvature center and in parallel to a rotating axis of the tire is not less than 20.degree..

REFERENCES:
patent: 5033524 (1991-07-01), Ohtsuka
patent: 5048584 (1991-09-01), Nakano et al.

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