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. 08, 2009
Filed:
Oct. 01, 2004
Daisuke Nakajima, Tokyo, JP;
Daisuke Nakajima, Tokyo, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
This invention relates to a pneumatic radial tire having low road noise and flat spot and a high high-speed durability, and more particularly to a pneumatic radial tire comprising a radial carcass (), a belt () disposed outside a crown portion of the carcass in a radial direction and comprised of at least two belt layers, and a belt reinforcing layer (A,B) disposed outside the belt in the radial direction, characterized in that the belt reinforcing layerA,B is formed by continuously and spirally winding a polyethylene terephthalate cord(s) in a circumferential direction of the tire, and this cord has an elastic modulus of not less than 2.5 mN/dtex·% under a load of 29.4 N measured at 160° C.