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. 26, 2000
Filed:
Nov. 13, 1998
Atsushi Yamakage, Akashi, JP;
Sumitomo Rubber Industries, Ltd., Kobe, JP;
Abstract
A pneumatic tire comprises a circumferential groove disposed in the axial center of the tread potion, circumferentially spaced main grooves disposed on both sides of the tire equator, the main grooves extending axially outwardly beyond the tread edges, while inclining to one circumferential direction and increasing the inclination angle of the groove center line with respect to the circumferential direction, auxiliary grooves each disposed between the circumferentially adjacent main grooves and extending from a middle portion of one of the main grooves towards the above-mentioned circumferential direction beyond the tread edge, each of the auxiliary groove having a part being equidistant from the adjacent main grooves and having a length more than 30% of the length of the auxiliary groove. The intersecting angle .beta. of the auxiliary grooves with the main grooves is in the range of from 20 to 60 degrees.