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. 11, 2018
Filed:
Jul. 23, 2015
The Yokohama Rubber Co., Ltd., Minato-ku, Tokyo, JP;
Toshiyuki Sato, Hiratsuka, JP;
Shoei Kakuta, Hiratsuka, JP;
Hideki Hamanaka, Hiratsuka, JP;
Yukihito Yamaguchi, Hiratsuka, JP;
Risa Tauchi, Hiratsuka, JP;
Abstract
Provided is a heavy duty pneumatic tire that includes a tread portion including, in a tread pattern: shoulder lug grooves extending outward in the tire width direction and opening at ground contact edges; a pair of circumferential primary grooves; center lug grooves; center blocks defined by the center lug grooves and the pair of circumferential primary grooves and aligned in the tire circumferential direction; and circumferential secondary grooves extending in the tire circumferential direction in the center block regions and opening to the center lug grooves adjoining the center blocks. The circumferential secondary grooves extend in the tire circumferential direction while changing positions in the tire width direction and each include third groove turning portions formed into a bent shape or a curved shape. The ratio P4/P1 of the width P4 of the circumferential secondary grooves to the width P1 of the circumferential primary grooves is from 0.70 to 1.10.