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:
Mar. 16, 1982
Filed:
Mar. 20, 1980
Applicant:
Inventors:
Masatoshi Kozima, Hiratsuka, JP;
Akinori Tokieda, Yokohama, JP;
Tadanobu Nagumo, Hiratsuka, JP;
Masaru Hirai, Yokohama, JP;
Assignee:
The Yokohama Rubber Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60C / ; B60C / ; B60C / ;
U.S. Cl.
CPC ...
1522 / ; 1523 / ; 1523 / ; 152360 ; 152374 ; 152D / ;
Abstract
A pneutmatic radial-ply tire in which the rubber portion of at least one of a carcass ply and an undertread constituting the tire is made of a rubber which has a viscoelastic property of loss tangent, tan.delta., of 0.2 or lower (tan.delta..ltoreq.0.2) and storage modulus, G, of 120 Kg/cm.sup.2 or higher (G.gtoreq.120 kg/cm.sup.2), so that the rolling resistance of the tire is reduced without being accompanied by degradation of braking performance, control stability, comfortableness and wear resistance of the tire.