Pneumatic radial tires including an annular recess portion in th

Details Pneumatic radial tires including an annular recess portion in th Pneumatic radial tires including an annular recess portion in th

1994-03-15

1995-05-02

Johnstone, Adrienne

Resilient tires and wheels

Tires, resilient

Anti-skid devices

152454, 152531, 152533, 152538, 1561101, 156117, B60C 300, B60C 920, B60C10100

Patent

active

054110696

ABSTRACT:
A pneumatic radial tire has a double crown structure that an annular recess portion is arranged in a tread at a given region in a widthwise direction thereof, in which the tread is divided into a central region, a pair of middle regions and a pair of side regions and at least one auxiliary reinforcing cord layer is arranged on a belt so as to substantially envelop a crown portion of a carcass and a full radially outer surface of the belt, provided that a stretching ratio of the cords in the auxiliary reinforcing cord layer in the central region and side regions is equal to or more than that in the middle regions, whereby high-speed durability is improved together with excellent drainage while controlling the increase of tire weight and cost as much as possible.

REFERENCES:
patent: 1363300 (1920-12-01), Yohn
patent: 4824501 (1989-04-01), Ushikubo et al.
patent: 5032198 (1991-07-01), Kojima et al.

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