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:
Nov. 02, 2010
Filed:
Jan. 20, 2006
Daisuke Nakajima, Kodaira, JP;
Daisuke Nakajima, Kodaira, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
This invention relates to a pneumatic radial tire being excellent in steering stabilities during low-speed running and high-speed running, and more particularly to a pneumatic radial tire comprising at least one belt reinforcing layerA,B disposed on a beltoutward in a radial direction of the tire, characterized in that a reinforcing element constituting the belt reinforcing layerA,B is a polyketone fiber cord satisfying conditions of the following equations (I) and (II):σ≧−0.01  (I)σ≧−0.02  (II)[wherein σ is a thermal shrinkage stress (cN/dtex) at 177° C.; and E is an elastic modulus (cN/dtex) at 25° C. under a load of 49 N].