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:
Jul. 12, 1994
Filed:
Jul. 14, 1993
Yoichi Nakamura, Kodaira, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
A heavy-duty radial tire including a carcass and four steel cord belts bearing most of stress of the tire. The carcass and the belts cross each other. An outer side belt layer of two belt layers of different cord diameters which are defined by the belts being divided into the two belt layers, the outer side belt layer being a belt layer of the two belt layers which is disposed at an outer circumferential side of the tire in a radial direction thereof; and an inner side belt layer disposed further toward an inner circumferential side of the tire in the radial direction thereof than the outer side belt layer. A difference between belt cord angles of respective belts of the outer side belt layers is less than or equal to 5.degree.. A difference between belt cord angles of respective belts of the inner side belt layers is less than or equal to 5.degree.. Further, 1<.PHI. out/.PHI. in.ltoreq.2.5, and .alpha. in-.alpha. out.gtoreq.5.degree. and (.alpha. out+.alpha. in)/2.ltoreq.23.degree., wherein: .PHI. out=belt cord diameter of the outer side belt layer; .alpha. out=average value of absolute values of belt cord angles, defined by an equatorial plane of the tire, of the outer side belt layers; .PHI. in=belt cord diameter of the inner side belt layer; and .alpha. in=average value of absolute values of belt cord angles, defined by the equatorial plane of the tire, of the inner side belt layers.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile