Tire with three belt plies

Resilient tires and wheels – Tires – resilient – Pneumatic tire or inner tube

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Details

152526, 152527, 152536, B60C 918, B60C 920

Patent

active

056538294

ABSTRACT:
The radial pneumatic tire of this invention is suitable for use on passenger cars, light trucks, or the like. The belt package of this otherwise conventional tire has three belts which are preferably steel. The first belt is at an angle of 55 to 80 degrees, the second belt is at an angle of 18 to 28 degrees and the third belt is at an angle or -18 to -28 degrees with respect to the midcircumferential plane. The parallel reinforcing members of the first belt ply are spaced apart a distance at least equal to the parallel reinforcing members of the second belt ply. The parallel reinforcing members of the third belt ply are spaced a distance apart a distance less than those of the second belt ply. The strength per unit width in the circumferential direction of the first belt ply is less than the strength per unit width in the circumferential direction of the second belt ply. The strength per unit width of the third belt ply is greater than that for the second belt ply. The preferred embodiment tire has the sum of the first and second belt ply strengths being at least equal to the third belt ply strength. An alternate embodiment tire has the sum of the first and second belt ply strengths being at most equal to the third belt ply strength.

REFERENCES:
patent: 2493614 (1950-01-01), Bourdon
patent: 3675703 (1972-07-01), Watts et al.
patent: 3945422 (1976-03-01), Pottinger
patent: 4526217 (1985-07-01), Maeda et al.
patent: 4696335 (1987-09-01), Tsukagoshi et al.
patent: 5061557 (1991-10-01), Kot et al.
patent: 5131446 (1992-07-01), Fukumoto et al.
Mechanics of Pneumatic Tires, ed. Samuel Clark US Dept. of Transportation, Aug. 1981, p. 131.

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