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Tyre with improved bead

A tire and bead technology, which is applied to tire parts, tire edges, vehicle components, etc., and can solve the problems of legacy carcass reinforcements, etc.

Active Publication Date: 2013-07-24
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Although this solution achieves a significant improvement in bead durability, it still leaves some risk of unwinding of the carcass reinforcement

Method used

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Examples

Experimental program
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Embodiment Construction

[0046] When the term "radial" is used, it is intended to distinguish between various uses of the word by those skilled in the art. First, the expression refers to the radius of the tire. This means that point A is said to be "radially inside" point B (or "radially inside" point B) if point A is closer to the axis of rotation of the tire than point B is. Conversely, point C is said to be "radially outside" point E (or "radially outside" point E) if point C is further from the axis of rotation of the tire than point E is. It can thus be said that when progress is made in the direction of a smaller (or larger) radius, the progress is said to be "radially inward (or outward)". This sense of the word is also used when referring to radial distances.

[0047] In contrast, a thread or reinforcement is said to be "radial" when the reinforcing elements of the thread or reinforcement form an angle greater than or equal to 80° and less than or equal to 90° with the circumferential direc...

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PUM

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Abstract

The invention relates to a tyre (10) that comprises two beads (20) each including at least one annular reinforcement structure (70), a padding gum (112) surrounding the annular reinforcement structure, a contention armature (121) folded around the padding gum, wherein, in any radial cross-section: the section SE of the assembly formed by the annular reinforcement structure (70) and the padding gum (112) is higher than or equal to 1.6 times the section ST of the annular reinforcement structure; the sections SU of the portion of the padding gum (112) radially outside the annular reinforcement structure (70), SD radially inside the annular reinforcement structure (70) and SO axially outside the annular reinforcement structure (70) are higher than or equal to 20% of the section ST; the section SI of the portion of the padding gum (112) axially inside the annular reinforcement structure (70) is higher than or equal to 10% of the section ST of the annular reinforcement structure.

Description

technical field [0001] The present invention relates to tyres, in particular tires intended to be fitted to "heavy" vehicles of medium or high tonnage, such as trucks, buses or trailers. Background technique [0002] Most tires, especially those intended to be fitted to "heavy" vehicles, include: [0003] - a tread crown comprising a crown reinforcement and covered radially outwards by a tread whose function is to provide contact with the ground while running along it; [0004] - two sidewalls extending the crown radially inwards; [0005] - two beads located radially inside the sidewall and each comprising at least one annular reinforcing structure, usually in the form of a bead wire, the beads being intended to be in contact with the tire The rim seat fits; [0006] - a carcass reinforcement comprising a plurality of reinforcing elements and anchored in each bead by upturning around an annular reinforcing structure forming and form an "upturning part" corresponding to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C15/04
CPCB60C15/04B60C2015/044
Inventor B·格里西尼J-M·维利耶
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN