Heavy duty-high pressure pneumatic radial tires

Details Heavy duty-high pressure pneumatic radial tires Heavy duty-high pressure pneumatic radial tires

1987-05-06

1989-12-19

Hoch, Raymond

Resilient tires and wheels

Tires, resilient

Pneumatic tire or inner tube

152540, 152553, B60C 920

Patent

active

048876550

ABSTRACT:
A heavy duty-high pressure pneumatic radial tires are disclosed, which each comprise a main reinforcement consisting of a carcass having an up-and-down type toroid radial construction in which a plurality of plies composed of fiber cords arranged in parallel with one another are turned up around a pair of bead cords on the right and left or the tire while the cords are arranged at angles substnatially along radial planes of the tire, at least one ply including a ply to be brought into direct contact with the bead cords being turned up around each of the bead cores from the inside to the outside of the tire and at least one remaining ply being laminated upon the outer side of the turn-up portion formed by the turn-up end portion of said at least one ply, and a belt which surrounds a crown portion of the carcass and is composed of a plurality of layers of parallel organic fiber cords having at least 150 g/d or an initial modulus higher than that of the cords of the carcass while at least one belt layer is laminated at an cord-arranged angle near substantially 0.degree. with respect to the crown circumference. The plies of the carcass are composed of organic fiber cords having a thermal shrinkage of not less than 1.0% and not more than 10% at 177.degree. C.

REFERENCES:
patent: 3638705 (1972-02-01), Devienne et al.
patent: 3841377 (1974-10-01), Montagne
patent: 3977172 (1976-08-01), Kerawalla
patent: 4088169 (1978-05-01), Kuroda
patent: 4258773 (1981-03-01), de St. Michel
patent: 4445560 (1984-05-01), Musy
patent: 4732199 (1988-03-01), Kajiwara

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