Sumitomo Rubber Industries Limited

Masahiro Oku

Kazumitsu Iwamura

Kazuo Asano

Yoshihide Kojima

Kiichiro Kakumu

Mitsushige Idei

The present invention relates to tire information providing method for providing information on at least one kind of tire to customer comprising the steps of: setting at least one kind of tire of which information is to be provided; setting at least one kind of road surface condition on which said tire is made to run; setting at least one kind of mounting condition for mounting said tire; setting at least one kind of evaluation parameter of said tire that is being wanted by said customer; performing tire rolling simulation based on said tire, said road surface condition and said mounting condition getting said evaluation parameter from said tire rolling simulation; and providing information comprising said evaluation parameter to said customer.

Tire information providing method and a providing apparatus

Method of manufacturing pneumatic tire

A pneumatic radial tire is disclosed, including an annular tread having a belt incorporated therein, a pair of sidewalls which extend radially inward from both ends of the annular tread and a bead portion, provided at the inner end of each sidewall, wherein the belt includes a belt ply having a plurality of belt cords in parallel arrangement, the belt cords being formed by twisting a plurality of steel filaments or two or more strands each consisting of a plurality of steel. filaments, and at least one of said steel filaments being replaced by a filament of a shape-memory alloy which, before it is twisted either as a belt cord or as a strand which forms a belt cord, has been heat set at a predetermined heat set temperature whereby the filament has a linear shape at a temperature below the heat set temperature and has a wavy shape at a temperature at or above the heat set temperature.

Pneumatic radial tire with belt cords having at least one shape-memory

A pneumatic radial tire for automobiles having a belt of steel cords and an organic cord reinforcement structure radially outward of the belt. The tire has improved uniformity and low vibration during high speed running due to the relative circumferential location of the joint in the tread layer, the joint in the full band reinforcement layer and the joint in the edge band which surrounds the belt.

Pneumatic radial tire for passenger cars with specified spacing of tread

A pneumatic radial tire, which comprises a carcass of at least one ply of radially arranged cords turned up around bead cords from the inside to the outside thereof, and a breaker disposed radially outside the carcass, the breaker comprising at least two radially adjacent plies of cords, the breaker having at least a portion in which the cords of each of the two plies are inclined with respect to an equatorial plane of the tire and the cords of one ply are inclined oppositely to the cords of the other ply, the cords of each of the breaker plies being so arranged that the cord angle QC in a crown portion of the breaker with respect to the equatorial plane differs from the cord angle QS in each of the shoulder portions of the breaker with respect to the equatorial plane, wherein the crown portion is centered on a tire equator and has a width of 0.4 to 0.8 times the maximum width of the breaker, and the shoulder portions are located one on each side of the crown portion, whereby both steering stability and ride comfort are improved in a well balanced manner.

Pneumatic radial tire

A radial tire comprises a carcass, a tread thereon, a breaker therebetween, bead cores, and rubber bead apexes, and is characterized in that:

Growing community of inventors

Osaka, Japan

Masahiro Oku