发明名称 |
Studless tire having lateral grooves |
摘要 |
A pneumatic tire comprises: a tread rubber having a Shore A hardness of not more than 65 degrees at 20 degrees C.; a tread portion provided with at least one circumferential row of blocks having circumferential edges adjacent to lateral grooves; each of the circumferential edges having a mean inclination angle of 0 to 60 degrees with respect to the tire axial direction; sidewalls of the lateral grooves on one side in the tire circumferential direction each comprising a first upper slope extending from the top of the adjacent block to a first point at a depth h1, while inclining at an angle alpha 1, and a first lower slope extending from said first point towards the groove bottom, while inclining at an angle alpha 2 smaller than the angle alpha 1,; the remaining sidewalls of the lateral grooves on the other side each comprising a second upper slope extending from the top of the adjacent block to a second point at a different depth h2 than said depth h1, while inclining at an angle beta 1, and a second lower slope extending straight from the second point towards the groove bottom, while inclining at an angle beta 2 smaller than the angle beta 1; and the lateral grooves comprising a portion (A) in which the depth h1 is more than the depth h2 but not more than 0.8 times the lateral groove depth, and a portion (B) in which the depth h2 is more than the depth h1 but not more than 0.8 times the lateral groove depth.
|
申请公布号 |
US6079464(A) |
申请公布日期 |
2000.06.27 |
申请号 |
US19980163569 |
申请日期 |
1998.09.30 |
申请人 |
SUMITOMO RUBBER INDUSTRIES, LTD |
发明人 |
HATAKENAKA, KENJI;SHIMIZU, KEIJI;KAWAI, TORU;HINO, HIDEHIKO |
分类号 |
B60C11/00;B60C11/04;B60C11/11;B60C11/12;B60C11/13;(IPC1-7):B60C11/11;B60C103/00;B60C107/00 |
主分类号 |
B60C11/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|