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:
May. 03, 2011
Filed:
Feb. 08, 2005
Shuichi Onuma, Tokyo, JP;
Toru Suzuki, Tokyo, JP;
Shuichi Onuma, Tokyo, JP;
Toru Suzuki, Tokyo, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
An aircraft pneumatic tire that has deeper grooves without causing deterioration in the heat resistance of a top tread and thereby can increase the number of landings per tread is provided. At least part of a top treadin the width direction of the tire has a two-layer structure consisting of a base tread layerand a cap tread layerstacked in the radial outward direction in this order. At least one circumferential groovetois provided in the surface of the top treadThe base tread layerand the cap tread layersatisfy the relationships expressed by the following formulas (1) and (2):1.05<(50)(50)≦1.30  (1)1.04<≦1.20  (2)(wherein M(50)and M(50)denote 50% moduli of the base tread rubber and the cap tread rubber, respectively, and Rand Rdenote the resiliences of the base tread rubber and the cap tread rubber, respectively).