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. 06, 1994
Filed:
Jun. 17, 1992
Masakazu Okihara, Hiratsuka, JP;
Tomohiko Kogure, Ashigara, JP;
The Yokohama Rubber Co., Ltd., Tokyo, JP;
Abstract
A pneumatic radial tire for a passenger car, which includes a plurality of grooves provided on the surface of a tread and extending at least in a tire circumferential direction and a belt layer having a double layer structure and provided within the tread, characterized in that the total sectional area, .alpha., of steel wires per 50 mm width of the belt layer is in a range satisfying 5.ltoreq..alpha..ltoreq.9 mm.sup.2, the depth, d, of the grooves is in a range satisfying 6.0.ltoreq.d.ltoreq.8.0 mm, and the thickness, t, of rubber under the grooves defined as the distance from the bottom of the groove to the outermost belt layer is in a range satisfying 1.0.ltoreq.t.ltoreq.2.5 mm.