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:
Nov. 12, 2013
Filed:
Nov. 05, 2009
Naoki Kageyama, Kobe, JP;
Naoki Kageyama, Kobe, JP;
Sumitomo Rubber Industries, Ltd., Kobe, JP;
Abstract
A pneumatic tire whose steering stability on dry roads is improved with minimizing lowering of on-snow performances and which has round shoulders and comprises tread portiondivided by circumferential main groovesand lateral groovesinto blocksprovided with sipeseach having zigzag part, the circumferential groovesincluding at least a pair of axially outermost circumferential groovesto divide the tread portioninto shoulder regions Ysh and crown region Ycr, wherein the zigzag partof sipesdisposed in the shoulder regions Ysh has a larger zigzag amplitude Wsh and a larger zigzag pitch Psh than zigzag amplitude Wcr and zigzag pitch Pcr of the zigzag partof sipesdisposed in the crown region Ycr, and angle θsh of the sipeswith respect to the axial direction is smaller than angle θcr of the sipeswith respect to the axial direction.