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. 25, 2008
Filed:
Nov. 06, 2003
Atsushi Miyasaka, Kodaira, JP;
Atsushi Miyasaka, Kodaira, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
A pneumatic tire having improved wet performance without sacrificing steering stability. A pair of central circumferential main groovesand a pair of side circumferential main groovesare arranged on a tread, to obtain a fundamentally high level of wet performance. A plurality of central land portion row lateral groovesis formed at both sides of a central land portion rowto be spaced away from each other substantially at a constant distance, to enhance wet performance. Central land portion row chamfer portionsare formed at obtuse angle portions of the central land portion row. The central land portion row chamfer portionsdrain water between a tread surface and a ground-contact surface into the respective central circumferential main groovesadjacent thereto, whereby wet draining performance is enhanced. Drainage is conducted by the central land portion row chamfer portions, so that it is unnecessary to use multiple central land portion row lateral grooves, thus making it possible to secure land portion rigidity of the central land portion row, and also steering stability.