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:
Jan. 09, 2001
Filed:
Jun. 25, 1998
Toshio Koyama, Kobe, JP;
Mitsuharu Koya, Akashi, JP;
Sumitomo Rubber Industries Ltd., Hyogo-ken, JP;
Abstract
A heavy duty pneumatic tire comprises a tread portion which is provide with wide circumferential grooves having a width Wm,of 4.0 mm to 20.0 mm and narrow circumferential grooves having a width Wm,of not less than 2.0 mm but less than 4.0 mm, and each region which is defined between one of the wide circumferential grooves and the axially adjacent narrow circumferential groove is provided with axial grooves extending from the wide circumferential groove to the narrow circumferential groove to circumferentially divide the region into blocks, wherein the axial grooves include variable-width grooves of which groove width increases from the wide circumferential groove to the narrow circumferential groove.