The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 23, 2001
Filed:
Jun. 23, 1999
Kiyoshi Ueyoko, Kobe, JP;
Sumitomo Rubber Industries, Ltd., Hyogo-ken, JP;
Abstract
A heavy duty radial tire which comprises a tread portion, a pair of sidewall portions, a pair of bead portions, a carcass extending between the bead portions and composed of a single ply of steel cords arranged radially at an angle of from 70 to 90 degrees with respect to the tire equator, and a belt disposed radially outside the carcass in the tread portion and composed of two cross plies of steel cords laid parallel with each other at an angle of from 0 to 45 degrees with respect to the tire equator, wherein in at least the central part of the tread portion having 50% of the axial width of the belt, the total amount of steel in the belt plies being in the range of from 6 to 10 times the steel amount in the carcass ply, and the thickness of rubber between the radially adjacent belt cords and carcass cords is in the range of from 0.7 to 3.0 mm. Preferably, the two belt plies are made of substantially the same amount of steel in the central part.