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:
Sep. 18, 2012
Filed:
Jan. 15, 2009
Hiroyuki Kojima, Hiratsuka, JP;
Hiroyuki Kojima, Hiratsuka, JP;
The Yokohama Rubber Co., Ltd., Tokyo, JP;
Abstract
Lateral groovesare disposed in a land portionbetween main groovesat prescribed intervals in a circumferential direction TC of the tire, the lateral groovesextending from the main groovesto a circumferential groove. Blocksare defined by the main grooves, circumferential grooveand lateral grooves. At least two sub-groovesare disposed in each blockat a prescribed interval in the tire circumferential direction TC, the sub-groovesextending from a main grooveadjacent thereto in a width direction of the tire. At least three block portionsA,B andC are formed. The width of the main grooveadjacent to the blockis varied by making the block widths Wa, Wb and Wc of the block portionsA,B andC different from each other. A groove wall surface, facing the main groove, of a block portion less in width has a greater inclination angle with respect to a tread normal direction. This allows for provision of a pneumatic tire capable of improving steering stability on a dry road surface and on a snow road surface.