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:
Apr. 24, 2001
Filed:
Jan. 14, 1999
Sumitomo Rubber Industries, Ltd., Hyogo-ken, JP;
Abstract
A heavy duty tire is provided in the tread portion with a circumferentially extending main groove on each side of the tire equator, a circumferentially extending narrow groove on each side of each main groove, lug grooves extending from the tread edges to the axially inner narrow grooves, and slits extending between the inner narrow grooves so as to form a rib-like portion between the two inner narrow grooves, first blocks between the inner narrow groove and main groove, second blocks between the main groove and axially outer narrow groove, and third blocks between the outer narrow groove and tread edge; the main grooves are disposed at a distance of 15 to 25% of the tread width from the tire equator; the main groove depth is 10 to 12% of the tread width; the narrow groove depth is less than the main groove depth; and the slit depth is 0.2 to 0.3 time the main groove depth.