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:
Aug. 09, 2016
Filed:
Jul. 01, 2008
Ryoichi Watabe, Tokyo, JP;
Koujiro Yamaguchi, Tachikawa, JP;
Ryoichi Watabe, Tokyo, JP;
Koujiro Yamaguchi, Tachikawa, JP;
BRIDGESTONE CORPORATION, Tokyo, JP;
Abstract
The present invention provides a pneumatic radial tire which is, by effectively suppressing collapse-deformation of a relatively large magnitude in sectioned portions of each block, which sections are demarcated by sipes, and also effectively preventing the sipe from making narrowing-deformation, excellent in not only driving performance and braking performance on an icy or snowy road but also driving stability on a general road. The tire characteristically includes: a tread having a contact surface; plural circumferential grooves; plural lateral grooves; blocksdemarcated by the circumferential grooves and the lateral grooves in the contact surface of the tread; and plural sipesprovided in the blocks, wherein the bottom portion of each sipeis provided with at least one upward-protruding projectionfor integrally connecting respective facing groove walls of the sipe