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:
Dec. 02, 2025
Filed:
Oct. 10, 2019
The Yokohama Rubber Co., Ltd., Tokyo, JP;
Masaaki Nagayasu, Kanagawa, JP;
The Yokohama Rubber Co., LTD., Tokyo, JP;
Abstract
In a pneumatic tire, a tread portion including rows of land portions defined by circumferential grooves extending in a tire circumferential direction is formed by sectors divided in the tire circumferential direction, sipes extending in a tire width direction formed in the land portions include a three-dimensional sipe, whose shape tread surface changes along a sipe depth direction, and a two-dimensional sipe, whose shape is constant along the sipe depth direction, and a ratio Rof a number of the three-dimensional sipes with respect to a total number of the sipes in a first boundary region, which is within 15 mm on one side of a sector dividing position in the tire circumferential direction, and a ratio Rt of a number of the three-dimensional sipes with respect to a total number of the sipes in all of the tread portion satisfy relationship R<Rt.