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:
Mar. 09, 2004
Filed:
Jun. 28, 2001
Masatoshi Tanaka, Kobe, JP;
Sumitomo Rubber Industries, Ltd., Hyogo, JP;
Abstract
A pneumatic tire comprises a tread portion, a pair of sidewall portions, a pair of bead portions, a carcass extending between the bead portions, and a tread reinforcement disposed radially outside the carcass in the tread portion. The tread reinforcement comprises a reinforcing rubber layer and a radially outer reinforcing cord layer. The radially outer reinforcing cord layer is made of cords disposed radially outside the reinforcing rubber layer. The reinforcing rubber layer extends across the substantially overall tread width and made of a rubber material having a hardness of not less than 70 degrees and a loss tangent of not more than 0.15. In a tire meridian section, the thickness of the reinforcing rubber layer being in a range of not less than 2 mm at the tire equator and gradually decreasing towards the axial edges of the reinforcing rubber layer.