Title:
HEAVY DUTY PNEUMATIC TIRE
Document Type and Number:
Japanese Patent JP3813709
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To ensure excellent wet performance even after the disappearance of striations, not to mention under the presence of striations, by extending each striation and each sipe at an angle within a specified range to the circumferential direction of a tread, and opening one ends of the striation and sipe to a main groove.
SOLUTION: A tread part is provided with main grooves 1 linearly in a circumferential direction, and ribs 2 are partitioned between these main grooves and between tread ends and the shoulder main grooves 1 positioned on the side end side. Each rib 2 is provided with striations 4 much shallower than the main grooves 1 and extended with circumferential spaces at an angle of 50-70° to the circumferential direction of the tread, and the bottom of each striation 4 is provided with a sipe 5 extended along the striation 4. One ends of each striation 4 and sipe 5 are opened to the main groove 1 so as to realize smooth drainage and to improve wet performance. Excellent wet performance can therefore be ensured even after the disappearance of the striations 4 in association with wear.
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Inventors:
Kazuhito Numata
Application Number:
JP23824297A
Publication Date:
August 23, 2006
Filing Date:
September 03, 1997
Export Citation:
Assignee:
Bridgestone Corporation
International Classes:
B60C11/04; B60C11/12; B60C11/11; B60C11/13; (IPC1-7): B60C11/12; B60C11/04; B60C11/13; B60C11/11
Domestic Patent References:
| JP10086613A | ||||
| JP8282213A | ||||
| JP9188110A | ||||
| JP7251610A | ||||
| JP6080002A |
Attorney, Agent or Firm:
Kosaku Sugimura
Hiroshi Tokunaga
Kazuaki Takami
Umemoto Masao
Juno Aoki
Shiro Fujitani
Hiroshi Tokunaga
Kazuaki Takami
Umemoto Masao
Juno Aoki
Shiro Fujitani