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:
Feb. 15, 2011
Filed:
Jan. 20, 2006
Hiroyuki Yokokura, Kodaira, JP;
Hidenobu Akahane, Kodaira, JP;
Yugo Zuigyo, Kokubunji, JP;
Daisuke Maehara, Kodaira, JP;
Masahiko Yamamoto, Tokyo, JP;
Hiroyuki Yokokura, Kodaira, JP;
Hidenobu Akahane, Kodaira, JP;
Yugo Zuigyo, Kokubunji, JP;
Daisuke Maehara, Kodaira, JP;
Masahiko Yamamoto, Tokyo, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
This invention relates to a tire having an improved durability in the run-flat running without damaging the ride comfort in the usual running, and more particularly to a run-flat tire comprising a sidewall portion provided with a side reinforcing rubber layer having a crescent shape at section wherein a cord layer including a polyketone fiber cord satisfying the following conditions of the following equations (I) and (II):σ≧−0.01×+1.2  (I)σ≧0.02  (II)[wherein σ is a thermal shrinkage stress at 177° C. (cN/dtex) and E is an elastic modulus at 25° C. under a load of 49 N (cN/dtex)] is disposed in at least a part of a region A ranging from a belt end to a maximum width part of a tire side portion and a region B ranging from a neighborhood of a bead core to a bead filler.