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:
Nov. 12, 2002
Filed:
May. 12, 1999
Kiyoshi Ueyoko, Kobe, JP;
Sumitomo Rubber Industries, Ltd., Hyogo-ken, JP;
Abstract
A heavy duty radial tire comprises: a carcass ply turned up around a bead core in each bead portion from the inside to outside of the tire so as to form a pair of turnup portions and a main portion therebetween; a bead apex rubber disposed between each of the turnup portions and the main portion, each. of the turnup portions extending radially outwardly beyond a radially outer end of the bead apex to adjoin the main portion; a chafer rubber disposed along at least an axially outer surface of each of the bead portions so as to define at least a flange-contacting part for contacting with a flange of a wheel rim; the height of the radially outer end of the bead apex being in the range of from 7 to 35% of the height of the carcass at the tire equator and being less than the height of the radially outer end of the chafer rubber; and the flange-contacting part being devoid of a concave profile. When the carcass ply is made of steel cords whose sectional area is in the range of from 0.10 to 0.25 sq.mm, a carcass reinforcing layer is disposed along the carcass so as to extend at least between the maximum tire width points and the edges of a belt disposed radially outside the carcass in the tread portion.