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:
Apr. 07, 2009
Filed:
Feb. 24, 2006
Kiyoto Maruoka, Kobe, JP;
Kiyoto Maruoka, Kobe, JP;
Sumitomo Rubber Industries, Ltd., Kobe-shi, JP;
Abstract
The present invention relates to a heavy duty tire being capable of preventing positional shift of carcass cords in the blowout direction while restricting rupture of the carcass cords for improving bead durability. A ply turnup portionsof a carcassincludes a sub-portionthat extends proximate of an upper surface SU of a bead corein a tire radial direction upon inclining towards a ply main body portionand further includes an auxiliary cord layerfor pressing the sub-portion outside thereof in the radial direction. A bead portionis further provided with a U-shaped bead reinforcing layer. A periphery of the bead coreis coated by a reinforcing rubber layermade of high elastic rubber having a complex elastic modulus E*a of 20 to 70 MPa, and a rubber thickness Tof a clearance portion G at which bead wiresand carcass cordsare adjacent is defined to be not less than 0.7 mm while a cushion rubber layermade of low elastic rubber layeris interposed between the reinforcing rubber layerand the carcass cords