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:
Sep. 01, 1998
Filed:
Jul. 10, 1996
Yukihide Ohya, Kobe, JP;
Sumitomo Rubber Industries, Ltd., Hyogo-ken, JP;
Abstract
A pneumatic tire, a tire making method and a tire vulcanizing mold are disclosed. The tire has a pair of rounded or tapered shoulder portions each of which is provided with a circumferentially extending narrow groove for improving the wandering performance. The mold is provided with a tread molding face and shoulder molding faces. Each of the shoulder molding faces is provided with a protrusion for forming the above-mentioned narrow groove. The protrusion is provided with slits for forming thin partition walls in the narrow groove. The tread molding face is provided with vent holes. And vent grooves each of which extends from one of the slits in the shoulder molding face into the tread molding face is provided. As a result, no spue is formed in the tire shoulder portions and the tire appearance is improved. And the productivity can be improved.