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Heavy-load pneumatic tire

A pneumatic tire and tire technology, which is applied in the field of tread patterns to prevent wet grip performance and block defects, improve snow driving performance and handling stability, and improve traction and handling stability.

Inactive Publication Date: 2007-02-07
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] As mentioned above, regarding the heavy-duty pneumatic tires that can improve the opposite performance of low-noise performance and on-snow performance, there is no performance that can fully satisfy the level of demand in recent years.

Method used

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Examples

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Effect test

Embodiment Construction

[0039] Hereinafter, one Embodiment of this invention is described based on drawing. figure 1 It is a plan view showing a tread pattern of a tread portion in which the tread portion of the heavy duty pneumatic tire (hereinafter simply referred to as a tire) 1 of the present invention is flatly developed. The tread T between the tread edges E, E of the tire 1 is formed by one or more radii of curvature on a section including the tire shaft. Further, the tread T is divided into blocks 4 by providing a plurality of longitudinal grooves 2 extending in the tire circumferential direction and a plurality of lateral grooves 3 extending in a direction intersecting the longitudinal grooves 2 . Wall grooves 5 extending in the depth direction are provided on the groove walls on one or both sides facing the longitudinal groove whose groove width W2 in the direction perpendicular to the groove center line is the widest or the second widest, and is formed as a belt Groove and vertical groove...

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Abstract

To provide a tread pattern of a pneumatic tire for heavy load enhancing both low noise performance and on-snow performance. Longitudinal length L4C of a central block, longitudinal length L4M of an intermediate block and longitudinal length L4S of an outer block, i.e., circumferential distances of respective tires between the most projecting end points on both sides of a tire circumferential direction of the central, intermediate and outer blocks (4) are defined; and lateral length W4C of the central block, lateral length W4M of the intermediate block and lateral length W4S of the outer block, i.e., tire axial distances between the most projective terminals at both sides in a tire axial direction of the respective central, intermediate and outer blocks (4) are defined. A longitudinal length ratio of the respective blocks is made to (L4S / W4S)<(L4M / W4M)<(L4c / W4C), 1.50 B60C 11 / 117 4 15 2 2006 / 7 / 31 1907738 2007 / 2 / 7 100473547 2009 / 4 / 1 2009 / 4 / 1 2009 / 4 / 1 Sumitomo Rubber Industries, Ltd. Japan Takahashi Nobugo xu qian luo yunpo 11227 Japan 2005 / 8 / 4 2005-226922

Description

technical field [0001] The present invention relates to a heavy duty pneumatic tire having improved both low noise performance and on-snow performance, and more particularly to a tread pattern for a heavy duty pneumatic tire for all seasons. Background technique [0002] Regarding heavy-duty pneumatic tires used for heavy vehicles such as trucks and buses, there is a great demand for all-season tires having performance on snow that can be driven on snow-covered roads. To improve performance on snow, this heavy duty all-season tire features a block pattern. In addition, with the improvement of the performance of the vehicle, especially the increase of the horsepower, it is necessary to further improve the performance on snow. [0003] It is known that the performance on snow tends to be improved by increasing the number of horizontal grooves and vertical grooves and the groove volume. On the other hand, all-season tires are required to have low-noise performance in order to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/117
Inventor 高桥伸吾
Owner SUMITOMO RUBBER IND LTD
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