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. 23, 1997
Filed:
Aug. 24, 1995
Makoto Tsuruta, Kodaira, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
A pneumatic radial tire, particularly a large-size and low-section profile pneumatic radial tire for truck and bus includes a stiffener disposed between a main body portion and each turnup portion of a carcass and constructed with a one-piece molded body of two or more rubber compositions having different hardnesses. A rubber composition having a highest hardness is arranged near to the main body portion of the carcass as a deformation-isolating rubber member having a greatest thickness at a position separated from a perpendicular line (Lv) drawn from an end of the turnup portion toward an outer surface of the carcass main body portion in tire cross-section, at least in a side of the tread portion among both sides sandwiching the perpendicular line (Lv), and a rubber composition having a lower hardness is arranged along an inner surface of the turnup portion.