Heavy duty radial tire with at least four steel cord layers

Details Heavy duty radial tire with at least four steel cord layers Heavy duty radial tire with at least four steel cord layers

1994-11-21

1997-11-18

Johnstone, Adrienne C.

Resilient tires and wheels

Tires, resilient

Pneumatic tire or inner tube

152526, 152534, 152535, B60C 918, B60C 920

Patent

active

056883447

ABSTRACT:
A heavy duty radial tire having a belt layer assembly formed of at least four layers formed from steel cords. The belt layers may be divided into two groups: a group of outer layers which are disposed at an outer side in a radial direction of the tire, and a group of inner layers which are disposed at an inner side in the radial direction of the tire. Cross-sectional areas of the steel cords of at least one layer of the group of outer layers are greater than the cross sectional areas of the steel cords of the group of inner layers. The steel cords of at least one layer of the group of outer layers and the group of inner layers are provided such that ratios I/A of cross sectional secondary moments I and cross sectional areas A of the steel cords are greater than or equal to 4.5.times.10.sup.-3 mm.sup.2. Accordingly, a superior effect can be achieved in that cut resistance can be improved without deterioration in other properties of the tire.

REFERENCES:
patent: 4742858 (1988-05-01), Takahira
patent: 5024261 (1991-06-01), Igarashi et al.
patent: 5027877 (1991-07-01), Tamura et al.
patent: 5054532 (1991-10-01), Kohno et al.
patent: 5261475 (1993-11-01), Yoshino et al.
patent: 5327954 (1994-07-01), Nakamura
patent: 5383507 (1995-01-01), Sato et al.

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