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Directional tire tread provided with fitted incisions

A tire tread and sipe technology, applied to tire tread/tread pattern, tire parts, vehicle parts, etc., can solve the problem of reducing braking performance

Active Publication Date: 2013-09-18
OCIETE DE TECH MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This localized wear reduces braking performance during early mileage

Method used

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  • Directional tire tread provided with fitted incisions
  • Directional tire tread provided with fitted incisions
  • Directional tire tread provided with fitted incisions

Examples

Experimental program
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Effect test

Embodiment Construction

[0026] By convention, it has been decided to use the same reference numerals to refer to the same elements throughout the drawings, regardless of the variant involved.

[0027] Symbolic rules for angles : This specification defines the method of defining the angle of the sipe; the rolling surface is positioned at the bottom of the drawing, and the direction of travel of the tire is from the right to the left of the drawing; if the rotation of the vertical line of the rolling surface is moved in one direction is counterclockwise (eg Figure 1A shown), the direction is said to be a positive angle with respect to the vertical.

[0028] Conversely, if the rotation moving the vertical in one direction is clockwise, that direction constitutes a negative angle (see Figure 1B ).

[0029] figure 2 The sipe 1 formed in the tread according to the invention is shown in a section perpendicular to the tangent plane of the rolling surface and including the direction of travel.

[0030...

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PUM

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Abstract

Directional tire tread having a rolling surface, this tread being provided with a plurality of incisions bounded by mutually opposing walls, each of said walls entering the rolling surface in such a way as to form an edge called the leading edge of an element of material, corresponding to the edge that enters the contact patch first, and an edge called the trailing edge of the same element of material, corresponding to the edge that enters the contact patch after the leading edge, each incision comprising at least one segment bounded by mutually opposing walls that make, with a direction perpendicular to the rolling surface passing through the intersection of the incision with the rolling surface, a negative average angle α whose absolute value is less than 55°, this tread being characterized in that this segment of negative angle α exits the rolling surface via an enlarged end portion bounded by mutually opposing first and second faces, the angles of the first face and second face being positive and not equal to each other.

Description

technical field [0001] The present invention relates to tire treads, and more particularly to treads comprising raised elements with sipes (cuts). Background technique [0002] The tire tread includes a rolling surface formed by the contact surfaces of raised elements bounded by a plurality of grooves (grooves). These grooves are particularly useful for efficiently draining accumulated water on the road surface on which the tire provided with the tread rolls. [0003] In order to improve tread performance on wet roads, it is known to provide treads with multiple sipes. A sipe is a space defined by two mutually opposing walls of material that are sufficiently close together that contact can occur between the walls as it passes the road tread contact block. Typically, the width of the sipe is less than or equal to 2 mm, and preferably less than 1 mm. These sipes extend in the direction of the tread thickness. [0004] The advantage of the sipe is that it creates an additio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/12
CPCB60C11/124B60C11/12B60C11/1281B60C11/1218
Inventor E·贝尔热S·菲吉耶M·博纳穆尔C·奥德贝尔
Owner OCIETE DE TECH MICHELIN