专利名称：To mount 发明人：石田 昌宏
申请号：JP2006332230申请日：20061208
公开号：JP5109356B2公开日：
20121226
专利内容由知识产权出版社提供
摘要：
PROBLEM TO BE SOLVED: To provide a pneumatic tire capable of improving durability not only under low internal pressure but also under high internal pressure.
SOLUTION: In the pneumatic tire, at least one carcass layer 4 is stretched between a pair of right and left bead parts 3. A plurality of belt layers 7 are arranged on the outer peripheral side of the carcass layer 4 in a tread part 1, and at least one belt reinforcing layer 8 is arranged on the outer peripheral side of the belt layer 7. A cap compound layer 11 is arranged on the outer peripheral side of the belt layer 7 and the belt reinforcing layer 8, and bead fillers 6 are arranged on the outer peripheral sides of bead cores 5 in the respective bead parts 3. A relationship between height A in the tire radial direction in a region having the cap compound layer 11, a distance F in the tire radial direction from the inner peripheral end of the cap compound layer 11 to the outer peripheral end of the bead filler 6 and tire cross ctional height SH, is t to A/SH ≤ 0.3, F/SH ≥ 0.45 and (A+F)/SH ≥ 0.75. JIS hardness of the bead filler 6 is t to 90 or more.
COPYRIGHT: (C)2008,JPO&INPIT
申请人：横浜ゴム株式会社
地址：東京都港区新橋５丁目３６番１１号国籍：JP
代理人：小川 信一，野口 賢照，斎下 和彦
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