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:
May. 29, 2012
Filed:
Feb. 26, 2010
Kiyoto Maruoka, Kobe, JP;
Kiyoto Maruoka, Kobe, JP;
Other;
Abstract
A heavy-load radial tire includes a bead apex rubbercomposed of a high-elastic lower apex portionand a low-elastic upper apex portion. The lower apex portionhas an L-shaped cross section composed of a bottom piece portiondisposed along the radially outer surface of a bead coreand a standing piece portionstanding from the axially inner end of the bottom piece portionand radially outwardly extending along a ply main portionof a carcass. At an outer end position Pof a ply turnup portion, the upper apex portionhas a thickness Tof 0.50 to 0.75 times a core width Bw of the bead core. At an outer end position Pof an outer wound-up portionof a bead reinforcing cord layer, the upper apex portionhas a thickness Tof 0.57 to 0.90 times the core width Bw. The core width Bw is 0.68 to 0.80 times a bead bottom width BL. A distance Woriented in parallel to an outer surfaceS of the bead coreand ranging from a bead heal point Ph to an axially innermost endof the bead coreis 0.92 to 1.08 times the bead bottom width BL.