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Tires with improved wear properties

A technology for tires and carcasses, applied in heavy-duty tires, tire parts, reinforcement layers of pneumatic tires, etc., can solve problems such as increased kilometers and durability effects

Active Publication Date: 2020-07-21
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The combination of conditions in which such tires are used for driving undoubtedly leads to an increase in the number of kilometers traveled due to the reduced wear on the tire; but on the other hand, the durability of the tire and especially the crown reinforcement is adversely affected

Method used

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  • Tires with improved wear properties
  • Tires with improved wear properties
  • Tires with improved wear properties

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0087] exist figure 1 In , a tire 1 of size 315 / 70R 22.5 has an aspect ratio H / S equal to 0.70, where H is the height of the tire 1 on its mounted rim and S is its maximum axial width. Said tire 1 comprises a radial carcass reinforcement 2 anchored in two beads (not shown in the figures). The carcass reinforcement is formed from a single layer of metal cords. The carcass reinforcement 2 is wrapped by a crown reinforcement 4 formed radially from the inside to the outside by:

[0088] - a first working layer 41 formed of unwrapped 9.28 non-extensible metal cords continuous over the entire width of the ply and oriented at an angle of 24°,

[0089] - a layer 42 of circumferential reinforcing elements formed of 21x23 steel metal cords of the "dual modulus" type,

[0090] - a second working layer 43 formed of unwrapped 9.28 non-extensible metal cords continuous over the entire width of the ply and oriented at an angle equal to 24° and crossing the metal cords of layer 41,

[00...

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PUM

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Abstract

The invention relates to a tire comprising a crown reinforcement consisting of at least two working crown layers (41, 43) of reinforcing elements and at least one layer (42) of circumferential reinforcing elements. form. According to the invention, the tread comprises a plurality of transversely oriented cuts (9) defined by walls of material facing each other, the depth of at least one transversely oriented cut, measured on a new tire, being greater than or equal to 40 times the thickness of the tread %, the width measured at the base of said at least one transversely oriented cutout is strictly greater than 4 mm.

Description

technical field [0001] The present invention relates to tires with radial carcass reinforcement, and more particularly to tires, for example intended to equip vehicles carrying heavy loads traveling at sustained speeds, such as trucks, tractors, trailers or coaches. Background technique [0002] In heavy tyres, the carcass reinforcement is usually anchored on either side in the bead area and is radially covered by a crown reinforcement consisting of at least two superimposed layers of The layers are formed by threads or cords parallel in each layer and crossing from one layer to the next so as to form an angle with the circumferential direction of between 10° and 45°. Said working layer forming the working reinforcement may further be covered by at least one layer called protective layer formed by reinforcing elements, advantageously metallic and stretchable and called elastic Reinforcement elements. It may also comprise layers of wires or cords of low elongation at an ang...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C9/20B60C11/12B60C11/03B60C9/22
CPCB60C9/2006B60C2200/06B60C11/1281B60C11/0323B60C9/22
Inventor P·热尔韦斯G·戈多B·匡蒂尼特T·日夫科维奇
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN