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:
Jun. 07, 2022
Filed:
Dec. 27, 2019
Bridgestone Corporation, Tokyo, JP;
Naohiko Obana, Tokyo, JP;
BRIDGESTONE CORPORATION, Tokyo, JP;
Abstract
Rubber article-reinforcing steel cord in which corrosion resistance is improved without an increase in weight. In a rubber article-reinforcing steel cord (), plural sheath strands () each formed by twisting together plural steel filaments are twisted together around at least one core strand () formed by twisting together plural steel filaments. Core strand () and sheath strands () are each formed by twisting together one or two core filaments () and () and plural sheath filaments () and (), respectively, and a relationship represented by the following Formula (1) is satisfied when a wire diameter of core filament(s) () of core strand (), a wire diameter of sheath filaments (), a wire diameter of core filaments () of sheath strands (), and a wire diameter of sheath filaments () are defined as dcc, dcs, dsc and dss, respectively: dcc>dcs≥dsc>dss (1).