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. 05, 1989
Filed:
Jun. 01, 1988
Shinichi Mori, Hiratsuka, JP;
The Yokohama Rubber Co., Ltd., Tokyo, JP;
Abstract
The specification discloses a pneumatic tire provided, on the tread surface thereof, with a plurality of main grooves extending towards the circumferential direction of the tire, a plurality of ribs defined by said main grooves, and a plurality of subgrooves provided on said ribs and traverse to the circumferential direction of the tire, wherein the groove angle of said subgrooves provided on said ribs on the shoulder side of the tire is smaller than that of said subgrooves provided on the ribs on the tread center side of the tire and the cross-sectional area of said subgrooves on said ribs on the shoulders is larger than that of said subgrooves provided on the ribs on the tread center side of the tire. This tire exhibits improved wet performances in, particularly, draining property and preventing hydroplaning while substantially maintaining the performances of the tire such as driving stability, durability, riding comfort, and abrasion resistance.