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. 17, 2001
Filed:
Oct. 11, 1994
Masashi Ohara, Niiza, JP;
Eiji Takiguchi, Higashiyamato, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
A low noise level tire includes a carcass composed of at least one ply toroidally extending between a pair of bead cores, and a tread arranged radially outwardly of the carcass and composed of an outer cap rubber layer and an inner base rubber layer. The cap rubber layer is made of a rubber having a dynamic storage modulus of not less than 1.0×10,dyn/cm,and not more than 2.0×10,dyn/cm,and a loss tangent more than 0.15 and not more than 0.35. The base rubber layer is made of a rubber having a dynamic storage modulus of not less than 1.2×10,dyn/cm,and not more than 2.2×10,dyn/cm,and a rate of foaming of not less than 5% and not more than 50%.