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. 17, 2015
Filed:
Apr. 05, 2010
Naoya Ochi, Higashimurayama, JP;
Naoya Ochi, Higashimurayama, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
A pneumatic tire comprising, in a tread portion, at least two block groups GB, each block group being composed of a plurality of independent blocksdefined by grooves, wherein the block groups GB have at least two different values of block number densities D, each of the block number densities D being represented by the formula: D=a/{PL×W×(1−N/100)}, wherein PL (mm) represents a reference pitch length of the blockin the block group G, W (mm) represents a width of the block group, a (pieces) represents the number of the blocks existing in a reference zone of the block group, the reference zone being demarcated by the reference pitch length PL and the width W, and N (%) represents a negative ratio in the reference zone; wherein the block number density of at least one block group is within a range of 0.003 (pieces/mm) to 0.04 (pieces/mm).