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. 08, 2002
Filed:
Mar. 04, 1999
Takashi Kaneko, Hanno, JP;
Kenjiro Yamaya, Kodaira, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
A pneumatic radial tire comprises a radial carcass, a belt, and a row of many blocks having different lengths along a circumference of a ground contact region under pitch variation defined in a tread rubber of the tread portion by at least two straight main grooves and a plurality of lateral sub-grooves extending between the mutual main grooves at an inclination angle of less than 90° with respect to the circumference of the ground contact region, in which the block row satisfies such relationships that an inclination angle &phgr; of an edge of a long-pitch block is larger than that &phgr; of an edge of a short-pitch block and an inclination angle &agr; of each block wall face of a long-pitch block is larger than that &agr; of each block wall face of a short-pitch block, or further an inclination angle &bgr; of a block wall face of a short-pitch block is larger than that &bgr; of a block wall face of a long-pitch block.