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:
Jun. 04, 1996
Filed:
Oct. 17, 1994
Atao Kishi, Hiratsuka, JP;
The Yokohama Rubber Co., Tokyo, JP;
Abstract
A pneumatic radial tire including a plurality of main grooves so formed on a tread surface of a tread portion as to extend in a tire circumferential direction and ribs defined by said main grooves, characterized in that a thin groove extending inward and obliquely is formed on a transverse side surface of shoulder portion of the tread portion in the tire circumferential direction, a ground non-contacting rib protruding from the transverse side surface is formed inside the thin groove in a radial direction in such a manner as to be separated by the thin groove, and angle .alpha. of the transverse side surface to a normal of a plane S inclusive of the tread surface is from 20.degree. to 60.degree., an angle .beta. of the thin groove to the normal of the plane S describes a line having an angle of 10.degree. to 50.degree., and a vertical distance h of the groove bottom of the thin groove from the plane S, a groove depth d of the main groove and a vertical distance g of the top surface of the ground non-contacting rib from the plane S satisfy the relation h/d=0.5 to 1.2 and g/h=0.5 to 0.8.