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:
Jun. 26, 2012
Filed:
Jun. 11, 2007
Yukihiko Ohki, Hiratsuka, JP;
Isamu Kishizoe, Hiratsuka, JP;
Yukihiko Ohki, Hiratsuka, JP;
Isamu Kishizoe, Hiratsuka, JP;
The Yokoyama Rubber Co., Ltd., Tokyo, JP;
Abstract
A pneumatic tire according to the present invention improves wet performance. The pneumatic tire has a tread surface. A first main grooveextending in the circumferential direction TC of the tire is provided in the tread surface. First lateral groovesextending from the first main grooveoutward in the widthwise direction of the tire beyond one ground contact end TXof the tire are disposed at prescribed intervals in the circumferential direction TC of the tire. Blocksare defined by the first main grooveand the first lateral grooves. The first lateral groovescomprise inner groove portionsA and outer groove portionsB. The inner groove portionsA extend with their widths gradually increasing from the first main grooveoutward in the widthwise direction of the tire to midways of the first lateral grooves. The outer groove portionsB extend with their widths gradually decreasing from the gradually increasing inner groove portionsA outward in the widthwise direction of the tire beyond the one ground contact end TXof the tire. A circumferential narrow groovewhich extends in the circumferential direction TC of the tire and is less in width than the first main grooveis disposed at boundary positions between the inner groove portionsA and the outer groove portionsB.