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:
Jan. 30, 1990
Filed:
Dec. 27, 1988
Applicant:
Inventor:
Kietsu Maeda, Toyonaka, JP;
Assignee:
Toyo Tire & Rubber Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60C / ; D02G / ;
U.S. Cl.
CPC ...
152556 ; 152451 ; 152557 ;
Abstract
Pneumatic radial tires for load vehicles include carcass plies reinforced with composite twisted filaments having a core-sheath structure, the core being made of polyester and the sheath being made of polyamide. The sheath accounts for 40-60 wt % of the entire core-sheath structure, and the coefficient of twist K of the cords satisfies the condition 1.22<K<2.24 and the initial modulus Md (g/d) of the cords satisfies the condition Md>45.0.