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. 07, 1993
Filed:
Nov. 01, 1991
Masahiro Oku, Osaka, JP;
Sumitomo Rubber Industries, Ltd., Hyogo, JP;
Abstract
A pneumatic radial tire is disclosed, including an annular tread having a belt incorporated therein, a pair of sidewalls which extend radially inward from both ends of the annular tread and a bead portion, provided at the inner end of each sidewall, wherein the belt includes a belt ply having a plurality of belt cords in parallel arrangement, the belt cords being formed by twisting a plurality of steel filaments or two or more strands each consisting of a plurality of steel. filaments, and at least one of said steel filaments being replaced by a filament of a shape-memory alloy which, before it is twisted either as a belt cord or as a strand which forms a belt cord, has been heat set at a predetermined heat set temperature whereby the filament has a linear shape at a temperature below the heat set temperature and has a wavy shape at a temperature at or above the heat set temperature.