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:
Dec. 14, 1999
Filed:
Sep. 29, 1997
Yoshiro Sumiya, Osaka, JP;
Hiroaki Sugimoto, Osaka, JP;
Toyo Tire & Rubber Co., Ltd., Osaka, JP;
Abstract
A rubber filler in the tire bead portions is formed by a hard rubber filler having JIS A hardness of at least 85, and a soft rubber filler having JIS A hardness of 65-75. An outer end C of the interface between the hard and soft rubber fillers is placed to be higher than the upper end of a rim flange and at least 10 mm lower than an end D of a turned-up steel cord carcass, in a cross section of the bead portion of the tire. Further, 1.0 La.ltoreq.Lb.ltoreq.2.0 La, where Lb represents the distance B-E from an inner-surface-side end B of the interface between a rubber bead cover and carcass topping rubber of a carcass ply to an inner-surface-side end E of the interface between the hard and soft rubber fillers, and where La represents the distance D-A from the end D of the turned-up carcass to an outer-surface-side end A of the interface between the rubber bead cover and the carcass topping rubber.