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Tire

A tire and tire circumferential technology, which is applied to tire parts, tire tread/tread pattern, transportation and packaging, etc., can solve the problems of reduced handling stability on dry roads and reduced rigidity of land parts, and achieves improved performance on ice and snow. Performance, effect to hold down decrease of steering stability

Pending Publication Date: 2022-04-15
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the lateral grooves and sipes provided on the land portion of the tire help to improve the performance on ice and snow, they tend to reduce the rigidity of the land portion and reduce the handling stability on dry roads.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] Hereinafter, one embodiment of the present invention will be described based on the drawings.

[0031] figure 1 It is a developed view showing the tread portion 2 of the tire 1 according to one embodiment of the present invention. The tire 1 of the present embodiment is suitable for use as an all-season pneumatic tire for passenger cars, for example. However, the present invention is not limited to such an embodiment, and can also be applied to winter tires, for example.

[0032] Such as figure 1 As shown, the tread portion 2 includes a plurality of circumferential grooves 3 continuously extending in the tire circumferential direction between two tread ends Te, and a plurality of land portions divided by the circumferential grooves 3 .

[0033] The two tread ends Te respectively correspond to the tire axial outermost ground contact positions when a normal load is applied to the tire 1 in a normal state and the tire 1 touches the ground at a camber angle of 0°.

[00...

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PUM

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Abstract

The present invention provides a tire which suppresses a decrease in steering stability on a dry road surface and improves performance on ice and snow, the tire having a tread portion (2). The tread portion (2) includes a circumferential groove (3) and a land portion (7). A first break groove (33), a second break groove (34), a first communicating sipe (37), a second communicating sipe (38), and a transverse sipe (40) are provided in a tread surface (7s) of the land portion (7). The transverse cutter groove (40) includes a first portion (41), a second portion (42), and a third portion (43). In a plan view of the tread, the first portion (41) overlaps a projection region in which the first communicating sipe (37) or the second communicating sipe (38) extends parallel to the axial direction of the tire.

Description

technical field [0001] The present invention relates to tires. Background technique [0002] Patent Document 1 below proposes a pneumatic radial tire in which longitudinal sipe and lateral sipe provided in a land portion communicate in a substantially L-shape. In the above-mentioned tire, it is expected that cornering performance on snow and braking performance on snow will be improved by the above-mentioned longitudinal sipes and the above-mentioned horizontal sipes. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2006-160055 [0004] The lateral grooves and sipes provided on the land portion of the tire contribute to the improvement of performance on ice and snow, but tend to reduce the rigidity of the land portion and degrade the steering stability on dry roads. Contents of the invention [0005] The present invention has been made in view of the above circumstances, and a main object of the present invention is to provide a tire with improved performance on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/03
CPCB60C2011/1209B60C2011/1213B60C11/0306B60C2011/0388B60C2011/0383B60C2011/0369B60C2011/0372B60C11/1263B60C11/12B60C2011/0381B60C2011/0341B60C11/1236B60C2011/1268
Inventor 三岛麻里
Owner SUMITOMO RUBBER IND LTD