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. 31, 1983
Filed:
Jan. 22, 1982
Applicant:
Inventors:
Assignee:
Bridgestone Tire Company Limited, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B60C / ;
U.S. Cl.
CPC ...
1522 / ;
Abstract
A tread pattern of two main groove-rib type provided with auxiliary grooves having excellent stone-biting resistance and stone-expelling property is disclosed. In the tread pattern, a pair of main grooves are disposed near both side edges of the tread along these edges and one or two pairs of auxiliary grooves are oppositely arranged between the main grooves, wherein the bottom of the auxiliary groove is directed to the center of the tire in such a manner that the center line in radial section of the auxiliary groove is inclined at an angle of 5.degree.-20.degree. with respect to a normal line of the tread drawn from an intersection of the center line and the tread.