Breaker for radial tire

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152361DM, B60C 920

Patent

active

042930197

ABSTRACT:
A pneumatic tire having a radial carcass which is adapted for use on heavy duty motor vehicles such as trucks and buses is provided with an annular reinforcing structure in the crown of the tire between the carcass and the tread band having at least three layers of metal cords with the two layers which are radially inner of the third layer being of cords having an ultimate elongation of about 3% and the cords of the third layer having an ultimate elongation of about 4% to about 8%. The cords of each of the two radially inner layers are substantially parallel to each other and inclined with respect to the direction of travel of the tire but the cords of one of the two layers cross those of the other layer. The cords of the third layer are substantially parallel to each other and to the direction of travel of the tire. The third layer has a central strip astride the center line of the tire and a lateral strip on each side of the center strip which is more resistant to tension and compression stresses than the center strip.

REFERENCES:
patent: 2958359 (1960-11-01), Baussu et al.
patent: 3625272 (1969-12-01), Fletcher
patent: 3667527 (1972-06-01), Magistrini et al.
patent: 4140168 (1979-02-01), Caretta
patent: 4169495 (1979-10-01), Maiocchi

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