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:
May. 25, 1993
Filed:
Nov. 20, 1990
Applicant:
Inventors:
Yukio Kaga, Atsugi, JP;
Tatsuo Suzuki, Hayama, JP;
Makoto Takagi, Hiratsuka, JP;
Fumio Tomisawa, Hiratsuka, JP;
Assignee:
The Yokohama Rubber Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60C / ; B60C / ;
U.S. Cl.
CPC ...
152527 ; 152526 ;
Abstract
A pneumatic radial tire having a carcass layer of cords disposed substantially at a right angle to the circumferential direction, and four belt layers sandwiched between the carcass layer and a tread. A pair of belt layers composed of a second and a third layer in the direction of from the carcass to the tread of the tire have cord layers crossing one another respectively at an angle of 10.degree. to 30.degree. to the circumferential direction, fatigue resistance of the cords of the second layer being significantly greater than fatigue resistance of the cords of the third layer.