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:
Jul. 15, 1997
Filed:
Dec. 07, 1994
Yoshiro Sumiya, Minoo, JP;
Hiroaki Sugimoto, Higashi osaka, JP;
Toyo Tire & Rubber Co., Ltd., Osaka, JP;
Abstract
A pneumatic tire for trucks, buses, etc. having a tread profile, before inflation, which has a first circular arc forming a tread center area and second circulr arcs forming shoulder ribs at both sides of the first circular arc, the first and second circular arcs intersecting together at a point from which the shoulder rib starts to extend and inwardly of which there is a 1/4 tread width point from a tread center axis, the first and second circular arcs having an inner radial divergence, between an inside wall top of an outermost main groove and the intersecting point, of up to 3 mm and an outer edge divergence, between an outer edge of the shoulder rib and an elongated line of the first circular arc, of up to 10 mm, whereby a good river wear resistance is attained. The tire has a belt portion, below the tread portion, including a working belt ply composite and preferably has such a tread rubber thickness to an uppermost working belt ply that is larger at an end of the uppermost working belt ply than at the tread center axis.