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. 20, 2013
Filed:
Jun. 18, 2008
Toshiyuki Ohashi, Osaka-fu, JP;
Toshiyuki Ohashi, Osaka-fu, JP;
Toyo Tire & Rubber Co., Ltd., Osaka, JP;
Abstract
A pneumatic tire with improved steering stability without raising air columnar resonance noise is provided. The pneumatic tire comprises first oblong holeshaving an opening portion of a trapezoidal shape that is elongated in the depth direction of a main grooveand whose depth Don the tread surface side is shallower than a depth Don the groove bottom side and second oblong holeshaving an opening portion of a trapezoidal shape that is elongated in the depth direction of the main groove and whose depth Don the groove bottom side is shallower than a depth Don the tread surface side, wherein number of the first oblong holesis 50 to 100% of the sum of oblong holesand, the depths Dand Dare at least not less than 0.5 mm and 0.05 to 0.3 times a width W of the main groove, the depths D, Dare not greater than 0.1 times a depth D of the main groove, widths w of the oblong holesare at least not less than 0.5 mm and 0.05 to 0.2 times the width W of the main groove, and heights H of the oblong holesin the depth direction of the main groove are 50 to 80% of the depth D of the main groove