Bridgestone Corporation

Kiyoshi Sato

Hiroyuki Koseki

Kuninobu Kadota

Yoshihide Kohno

Tatsuro Shimada

Yasuhiko Kobayashi

A pneumatic radial tire comprising a toroidal carcass layer having a number of radially extending cords buried therein, a belt layer arranged on a radially outer side of the carcass layer and containing a number of nonstretchable cords inclined to an equatorial plane of the tire, and a reinforcing layer arranged between the carcass layer and the belt layer and containing a number of reinforcing elements. The reinforcing elements extend in parallel to the tire equatorial plane as a whole, and are waved at a substantially equal wavelength. The phase of a plurality of the reinforcing elements among all the reinforcing elements buried in the reinforcing layer is different from that of the remaining reinforcing element or elements.

Pneumatic radial tires including waved reinforcing elements between belt

A heavy duty radial tire includes at least one radial carcass extending from one bead portion to the other bead portion and using inextensible cords and a belt arranged outwardly of the radial carcass for reinforcing a tread of the tire. The tire comprises, during expanding of the tire from 5% to 100% of a normal inner pressure, a first profile portion expanding radially outwardly in a tread zone, a second profile portion depressing axially inwardly of the tire in a radially outer zone of a sidewall from one end of said tread to a tire maximum width position when filled with the normal inner pressure, and a third profile portion expanding axially outwardly of the tire in a radially inner zone of the sidewall from the tire maximum width position when filled with the normal inner pressure to a parting point of the sidewall from the rim, thereby properly distributing strains occurring in the tire in filling with the normal inner pressure.

Heavy duty radial tire carcass profile

A crown portion of a pneumatic tire comprising at least one radial carcass ply and a belt of at least two cross belt layers is reinforced by arranging a strip containing wavy or zigzag-like cords or filaments between the carcass ply and the belt as a crown reinforcing layer.

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Kodaira, Japan

Kiyoshi Sato