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. 19, 2011
Filed:
Aug. 27, 2007
Shingo Takahashi, Kobe, JP;
Shingo Takahashi, Kobe, JP;
Sumitomo Rubber Industries, Ltd., Kobe, JP;
Abstract
A heavy duty tire is vulcanized in a segmented mold having a tread molding surface defined by circumferentially arranged segments. The tread portion is molded by the tread molding surface during vulcanization of the tire, wherein the stretch of the belt layer in the tire radial direction during vulcanization is in a range of from 3.2 to 5.2%. the tread portion is provided with an axially outermost circumferential groove at an axial distance from the tire equator which distance is in a range of from 50% to 68% of one half of the tread width. The footprint shape satisfies the following conditions: (1) 1.05=<SL/SL=<1.18; and (2) 0.95=<SL/SL=<1.05, wherein SL, SLand SLare the circumferential lengths of the footprint shape measured at axial distances of 0%, 70% and 97%, respectively, of one half of the tread width from the tire equator.