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. 09, 2009
Filed:
Sep. 08, 2006
Kazuki Numata, Kobe, JP;
Kazuki Numata, Kobe, JP;
Sumitomo Rubber Industries, Ltd., Kobe-Shi, JP;
Abstract
A heavy duty tire with decreased rolling resistance without impairing durability, comprising carcass, belt layerdisposed radially outward of the carcass in tread portion, and sidewall rubberdisposed axially outward of the carcass in sidewall portionand extending in the radial direction of the tire, wherein the sidewall rubber includes an axially inner rubber portiondisposed axially outward of the carcass and an axially outer rubber portiondisposed axially outward of the inner rubber portion to form the tire outer surface, the inner rubber portionhas a lower loss tangent 'tan δ' than the outer rubber portionby a difference of 0.010 to 0.035, and the inner rubber portionhas a lower complex elastic modulus than the outer rubber portionby a difference of 0.5 to 1.4 MPa.