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:
Oct. 31, 2000
Filed:
Mar. 11, 1998
Yoichi Nakamura, Kodaira, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
A bead portion durability of a pneumatic radial tire for large-size vehicle is improved by disposing a combination of a first protection rubber layer A having a 100% modulus of 25-40 kgf/cm.sup.2 and a second protection rubber layer B having a 100% modulus of 30-50 kgf/cm.sup.2 in given places of the bead portion so as to locate an inner end of the first protection rubber layer A in the radial direction of the tire between an outer end of a curved face of the bead heel in the radial direction and an end of a curved face of a rim flange and locate an outer end of the second protection rubber layer B in the radial direction of the tire at such a position outward in the radial direction of the tire that an inclination angle defined between a line segment connecting this end to a curvature center of the curved face of the rim flange and a phantom line passing through the curvature center and in parallel to a rotating axis of the tire is not less than 20.degree..
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile