Pneumatic tires including spirally wound auxiliary layer outside

Details Pneumatic tires including spirally wound auxiliary layer outside Pneumatic tires including spirally wound auxiliary layer outside

1989-05-30

1991-01-29

Ball, Michael W.

Resilient tires and wheels

Tires, resilient

Pneumatic tire or inner tube

152531, 152533, 152538, B60C 922, B60C 926

Patent

active

049879383

ABSTRACT:
Pneumatic tires are disclosed, which each comprise a pair of beads, a toroidal carcass composed of at least one carcass ply which extends between the beads and is composed of cords arranged substantially in a radial direction of the tire, a belt layer superimposed radially outside a crown portion of the carcass, a tread arranged radially outside of the belt layer to cover the belt layer, and an auxiliary layer which is arranged between the tread and the belt layer to cover the whole belt layer and is composed of an organic fiber cord arranged substantially in parallel with the tire circumferential direction. The tread is constituted by a tread central portion containing a tire equatorial plane, a pair of tread side edge portions covering the side edges of the belt layer, and a pair of tread intermediate portions between the tread central portion and the tread side edge portions. The auxiliary layer comprises a plurality of plies at at least widthwise opposite side edge portions, and is constituted by a continuous cord member comprising at least one rubberized cord which is spirally wound in the tire circumferential direction. The opposite ends of the cord member of the auxiliary layer are located radially inside the tread intermediate portion or portions of the tread.

REFERENCES:
patent: 3503432 (1970-03-01), Maiocchi
patent: 3776792 (1973-12-01), Grawey
patent: 4135566 (1979-01-01), Senger et al.
patent: 4183391 (1980-01-01), Romano
patent: 4258774 (1981-03-01), Mirtain et al.
patent: 4293019 (1981-10-01), Maiocchi

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