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:
Apr. 14, 2009
Filed:
Nov. 23, 2005
Fumihiro Tsubono, Kobe, JP;
Mitsuharu Koya, Kobe, JP;
Naoki Kageyama, Kobe, JP;
Sumitomo Rubber Industries, Ltd., Kobe-shi, JP;
Abstract
A pneumatic tire comprises a tread portion provided with sipes, the sipes each having a zigzag configuration at any depth from the top of the sipe to a certain depth, and the zigzag configuration having vertexes Qon one side of the zigzag and vertexes Qon the other side of the zigzag, wherein as the depth increases from the top of the sipe to said certain depth, the vertexes Qshift in the longitudinal direction of the sipe and the direction of the shift is turned at least once such that the vertexes Qfirst shift towards one direction then towards the other direction, thereby describing a zigzag line extending from the top of the sipe to said certain depth and having at least one tuning point, but the vertexes Qdescribe lines which are linear or less zigzag when compared with the zigzag lines described by the vertexes Q