High speed radial tire with durable bead part

Details High speed radial tire with durable bead part High speed radial tire with durable bead part

1991-11-18

1994-02-15

Ball, Michael W.

Resilient tires and wheels

Tires, resilient

Anti-skid devices

152451, 152454, 152539, 152556, B60C 300, B60C 900, B60C 908, B60C 1100

Patent

active

052858359

ABSTRACT:
This invention relates to high-speed radial tires, and more particularly to radial tires wherein the thickness ratio (Gc-Gs)/Gc, that is the ratio of the difference between the crown tread thickness Gc, which is a thickness of the tread on the equator of the tire, and the shoulder tread thickness Gs, which is a thickness of the tread of the ground contact surface at the outer edge in direction of the tire axis, to the crown tread thickness Gc is set to be 0 or more and 0.8 or less. By setting the ratio within a range of 0 to 0.8, the force Fs acting in the radial direction on the tread shoulder part, out of the total load acting to the tire, is decreased, thus, the deformation in the bead part is diminished and the permanence in the bead part can be improved. In a tire having the ratio of 0 to 0.8, by setting the angle of the belt cords to be 0 to 20 degrees, it can be used for aircraft and by setting the angle of the belt cords to be 20 to 40 degrees and the aspect ratio to be 60% or less, it can be used for high-speed passenger cars.

REFERENCES:
patent: 3455100 (1969-07-01), Sidles et al.
patent: 4214620 (1980-07-01), Mezzanotte
patent: 4269646 (1981-05-01), Miller et al.
patent: 4271890 (1981-06-01), Pommier
patent: 4342353 (1982-08-01), Tamura et al.
patent: 4520856 (1985-06-01), Pommier
patent: 4751952 (1988-06-01), Imai
patent: 4932452 (1990-06-01), Kawabata et al.

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