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:
Mar. 10, 1998
Filed:
Sep. 28, 1995
Yasufumi Ichiki, Tokyo, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
A heavy duty pneumatic tire possessing excellent wet-running performances and wear resistance comprises a tread portion provided at its surface with a plurality of main grooves arranged on both sides with respect to an equatorial plane at a given interval in a circumferential direction of the tire and has a negative ratio of not more than 0.3. In this tire, the main grooves curvedly extend in a converging direction from each side end of the tread toward the equatorial plane and terminate on the equatorial plane or in the vicinity thereof within 25% of a tread width (W) centering around the equatorial plane so as to meet the terminals of opposed main grooves with each other or somewhat separate away them from each other and have particular inclination angle (.alpha.), and continuously projection lengths (L.sub.1, L.sub.2) in the widthwise and circumferential directions.