Bridgestone Corporation

Akihito Goto

Yoichi Nakamura

Minoru Nakano

Yasutaka Enoki

Akira Tamura

Yasuaki Tsurunaga

In a heavy duty pneumatic tire, a protrusion is disposed in an intersect portion between circumferential groove and transverse groove in a tread of block pattern, whereby stone capturing is prevented. Furthermore, blind sipe is formed in each block of at least center and second block rows, whereby heel and toe wear as well as shoulder wear are prevented.

Heavy duty pneumatic tires

Automobile tire

A heavy duty pneumatic radial tire running on rough road at high speed and having plural belt layers of steel cords comprises at least a pair of auxiliary protective strips superimposed on the belt layer so as to cover both end portions of the belt layer and protrude outward from the end portion, wherein cords of the auxiliary protective strips are inclined at an angle of 25.degree.-25.degree. with respect to the circumferential direction of the tire and are the same direction as in the cord direction of the belt layer supporting the auxiliary protective strips.

Heavy duty pneumatic radial tires whose belt includes a pair of

A radial tire for a construction vehicle includes a tread, a pair of sidewalls extending radially inwardly and terminating in inner edges having bead cores embedded therein, a carcass made of a steel cord ply extending between the bead cores, a belt arranged between the carcass and the tread to form with the carcass a main reinforcing layer, and bead reinforcing layers. Each of the bead reinforcing layers includes at least two sets of fiber cord layers. Each of the sets has at least two fiber cord layers. The at least two sets of the fiber cord layers are arranged extending radially outwardly from the proximity of an axially outer portion of the bead core and spaced each other to have a minimum spaced distance in the proximity of the bead core and a maximum spaced distance at radially outer end between the two sets of fiber cord layers, said fiber cord layers within said sets being substantially uniformly spaced from each other.

Radial tire for constuction vehicle

A pneumatic radial tire includes a carcass anchored to a pair of beads, and laminated belts having at least two belt layers circumferentially extending outside of a crown portion of the carcass and consisting of cords intersecting between adjacent belt layers. One of the laminated belts is divided in circumferential directions of the tire into a center portion and two side portions. A divided width A of the divided belt from its center to its divided points has a relation

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Kodaira, Japan

Akihito Goto