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. 06, 2018
Filed:
Apr. 10, 2012
Toshikazu Kondo, Kobe, JP;
Takuya Horiguchi, Kobe, JP;
Emiko Mogi, Wako, JP;
SUMITOMO RUBBER INDUSTRIES, LTD., Kobe-Shi, JP;
HONDA MOTOR CO., LTD., Tokyo, JP;
Abstract
Provided is a pneumatic tire capable of improving fuel efficiency, handling stability, and durability in a balanced manner. The present invention relates to a pneumatic tire, comprising a tread that includes a cap layer and a base layer, the cap layer and the base layer satisfying relationships represented by the following formulas (1) to (3):50/50≦≦90/10  (1)wherein Vc is the volume of the cap layer and Vb is the volume of the base layer,0.65≦<1.00  (2), and1.30≦(tan δ)/(tan δ)<2.40  (3)wherein E*c and tan δc are the complex modulus and the loss tangent, respectively, of the cap layer at 30° C., and E*b and tan δb are the complex modulus and the loss tangent, respectively, of the base layer at 30° C.