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. 12, 2013
Filed:
Sep. 04, 2007
Seiji Itai, Tachikawa, JP;
Seiji Itai, Tachikawa, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
The present invention provides a belt formed of a spirally wound strip member constituted of a few juxtaposed cords and rubber coating thereon, with a structure which can absorb influence of difference in winding diameter at the unit width portion of the strip member without deteriorating productivity of the tire. Specifically, the present invention provides a radial tire for use in aircraft, having a carcass including at least one layer of carcass ply extending in a troidal shape between a pair of bead cores, at least two layers of belt formed by spirally winding in a tire circumferential direction a strip member constituted of plural juxtaposed cords and rubber coating thereon, on the carcass on the outer side in the tire radial direction at a crown region of the carcass, and a tread rubber laminated on the belt, characterized in that: thickness and circumference of the belt decrease from the tire equatorial face toward end portions thereof in the widthwise direction; at least a belt portion corresponding to a tire shoulder portion, a boundary face between the belt layers and the tread rubber has a stepped configuration descending in the tire radial direction from the tire equatorial face toward the end portions thereof in the widthwise direction; and a boundary face between the belt and the carcass is a smooth curved face.