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:
Mar. 12, 2002
Filed:
Sep. 24, 1999
Applicant:
Inventor:
Toshiya Miyazono, Kodaira, JP;
Assignee:
Bridgestone Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60C 1/500 ; B60C 1/506 ;
U.S. Cl.
CPC ...
B60C 1/500 ; B60C 1/506 ;
Abstract
A heavy duty pneumatic radial tire has a light weight of a bead portion and an excellent bead portion durability and is provided with a bead portion reinforcing layer covering an outer surface of a carcass ply around a bead core, in which the bead portion reinforcing layer is comprised of a single rubberized steel cord layer or of two or three independent rubberized steel cord layer segments. In this case, the steel cords arranged in the bead portion reinforcing layer have an inclination angle of a given range with respect to a circumferential line of the tire.