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:
Aug. 26, 2014
Filed:
Jan. 05, 2010
Kiyoto Maruoka, Kobe, JP;
Kiyoto Maruoka, Kobe, JP;
Sumitomo Rubber Industries, Ltd., Kobe, JP;
Abstract
A heavy duty radial tire comprises a tread portion divided into four or five circumferential ribs and a tread reinforcing belt including a maximum width belt ply. The width Bw of the maximum width belt ply is 0.90 to 0.98 times the tread width Tw. The contour shape of the tire footprint has a ground contacting length CB at a 70% width position and a ground contacting length CC at a 97% width position, wherein the ratio CB/CC is 1.00 to 1.06. In a tread edge near region J, (1) the axially outermost shoulder rib is provided with no circumferential groove having a width of less than 5 mm, and a ratio Rs/Rc of an axial width Rs of the shoulder rib to an axial width Rc of a center rib is 1.25 to 1.45, or (2) the shoulder rib is provided with a narrow circumferential groove having a width of less than 5 mm to divide the shoulder rib into an axially inner main portion and an axially outer narrow portion, and a ratio Rs/Rc of an axial width Rsof the axially inner main portion to an axial width Rc of a center rib is 1.25 to 1.45.