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:
Jul. 18, 1995
Filed:
Jul. 30, 1991
Applicant:
Inventors:
Hiroshi Yamaguchi, Saitama, JP;
Shigehito Kishinami, Tokyo, JP;
Hiroshi Ueda, Tokyo, JP;
Fumio Bamba, Tokyo, JP;
Assignee:
Bridgestone Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60C / ; B60C / ; B60C / ;
U.S. Cl.
CPC ...
152454 ; 152539 ; 152541 ; 152543 ; 152546 ; 152552 ; 152554 ;
Abstract
The bead durability of the heavy duty pneumatic radial tire for truck and bus is improved by arranging a rubber stock composed of three rubbers A, B and C each having particular properties between a carcass ply and its turnup portion in the bead portion and/or rendering the turnup portion of the carcass ply in the bead portion into a particular arrangement.