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:
Feb. 19, 2002
Filed:
Feb. 16, 2000
Yasuhiko Kobayashi, Hachioji, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
A heavy duty pneumatic tire comprises a tread portion, a plurality of lug grooves formed in the tread portion so as to extend from a tread end toward an equator of the tire, and a central land portion formed between two circumferential lines passing through terminal positions of these lug grooves substantially in a circumferential direction of the tire, wherein the tread portion is made of rubber having a loss tangent at room temperature of 0.04˜0.40, and has a given negative ratio at a region corresponding to at least 50% of a tread width around the equator and a given maximum groove depth of the lug groove located at a zone corresponding to at least 80% of the tread width around the equator, and a circumferential shallow groove is formed in the central land portion.