Title:
重荷重用空気入りラジアルタイヤ
Document Type and Number:
Japanese Patent JP3983270
Kind Code:
B2
Abstract:
Provided is a pneumatic radial tire including a main belt layer and at least one circumferential-direction reinforcement layer, which are provided in the tread portion. The main belt layer includes two belt layers in which steel cords are disposed in a manner that the steel cords of a first one of the two belt layers intersect the steel cords of a second one of the two belt layers. In the circumferential-direction reinforcement layer, steel cords are disposed in a substantial tire circumferential direction. The ratio Wo/Wm of the width Wo of the circumferential-direction reinforcement layer to the maximum width Wm of the main belt layer is 0.5 to 0. 9. The ratio Ee/Ec of the reinforcement-cord elastic modulus Ee of the steel cords in the edge portions of the circumferential-direction reinforcement layer to the reinforcement-cord elastic modulus Ec of the steel cords in the center portion of the circumferential-direction reinforcement layer is not less than (0.85-0.5Wo/Wm) and not more than 0.8.
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Inventors:
Shinya
Application Number:
JP2006529394A
Publication Date:
September 26, 2007
Filing Date:
May 31, 2006
Export Citation:
Assignee:
THE YOKOHAMA RUBBER CO.,LTD.
International Classes:
B60C9/18; B60C9/20; B60C9/22
Domestic Patent References:
| JP2001512390A | ||||
| JP11502166A | ||||
| JP2001253208A | ||||
| JP2001191725A | ||||
| JP2002506403A |
Attorney, Agent or Firm:
Shinichi Ogawa
Takashi Noguchi
Kazuhiko Saishita
Takashi Noguchi
Kazuhiko Saishita