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Inflated tyre

A technology of pneumatic tires and tires, applied in tire parts, tire tread/tread pattern, transportation and packaging, etc., can solve problems such as inability to achieve drainage capacity

Inactive Publication Date: 2002-07-24
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this will not achieve the main purpose of setting wide grooves—that is, to enhance drainage capacity

Method used

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Examples

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Embodiment Construction

[0017] According to the present invention, a pneumatic tire comprises a tread portion 1, a pair of axially separated bead portions, a pair of sidewall portions, a ply extending between the bead portions, and a tread reinforcement The belt layer, which is arranged as usual radially outward of the peripheral portion of the ply.

[0018] In this embodiment, the pneumatic tire is a radial tire used on station wagons such as microcars.

[0019] exist figure 1 Among them, the tread portion 1 is located at the half portion Yo between the tire midline C and the outer tread warp Eo, and the half portion Yi of the tread portion 1 located between the tire midline C and the inner tread warp Ei have different tire patterns. Here, "inner side" and "outer side" are related to the application of the tire on a vehicle, wherein the outer half Yo and the inner half Yi are located on the outer side and inner side of the vehicle, respectively. In addition, the arrangement of the tread pattern f...

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Abstract

A pneumatic tire comprises a tread portion provided with at least one wide circumferential groove, the wide circumferential groove (3A) extending continuously in the tire circumferential direction and having a groove width GW of not less than 5% of the ground contacting width TW, the wide circumferential groove provided in the groove bottom with a groove bottom rib (13), the groove bottom rib (13) extending continuously along the overall length of the wide circumferential groove, the groove bottom rib having a height Hr in a range of from 0.5 to 3.0mm and a base width Wr in a range of from 10 to 30% of the groove width GW, and the groove bottom rib provided in the top face with a small groove (12) having a depth Dr of less than the height Hr.

Description

technical field [0001] The present invention contemplates a pneumatic tire, and more specifically, the present invention contemplates a tread structure capable of suppressing air resonance in wide circumferential grooves. Background technique [0002] In pneumatic tires having wide circumferential grooves, especially substantially straight grooves, the wide circumferential grooves form an open air duct between the tire and the road surface at the ground contact point with the tread of the tire. Such pipes are prone to resonance during driving. If the fundamental frequency of resonance is around 1000, and the human ear is most sensitive to this frequency band, this will increase the driving noise of the tire. Resonance can be prevented by reducing the width of the groove. But this cannot achieve the main purpose of setting wide grooves—that is, to enhance the drainage capacity. [0003] SUMMARY OF THE INVENTION It is therefore an object of the present invention to devise a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/03B60C11/04B60C11/13
CPCB60C11/1384B60C11/0304B60C11/0309B60C11/13B60C2011/1361B60C11/1353
Inventor 松本忠雄
Owner SUMITOMO RUBBER IND LTD