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Tyre bead with extended mobility

A tire and bead technology, applied to the reinforcement layer of pneumatic tires, special tires, tire parts, etc., can solve the problems of tire installation/removal difficulty, and achieve the effect of easy installation/removal, large degree of freedom, and simplified manufacturing

Inactive Publication Date: 2004-11-24
MICHELIN & CO CIE GEN DES ESTAB MICHELIN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tire installation / removal is difficult due to unfavorable radial position of the cord unless high elongation cords are used

Method used

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  • Tyre bead with extended mobility
  • Tyre bead with extended mobility
  • Tyre bead with extended mobility

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0051] In this specification, the term "cord" generally refers to monofilaments and multifilaments or components, such as multi-strand, plied or any equivalent type of component, regardless of the material and treatment of these cords. They may be surface-treated, coated or pre-finished, for example to aid in bonding with rubber.

[0052] On the other hand, "radial structure" is understood to be arranged at 90°, but according to custom, it can also be an angle close to 90°.

[0053] It is known that generally the carcass ply is turned upside down about the bead wire which then acts to fix the carcass. In particular, therefore, it is subjected to the tensile forces formed on the carcass cords, for example under inflation pressure. The structures described in this document are able to guarantee a similar fixation.

[0054] It is also known to ensure the clamping function of the bead on a rim with bead wires of conventional form. The structure described in this document also e...

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PUM

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Abstract

A tire for a vehicle wheel, comprising two sidewalls joined by a crown zone provided on its radially outer portion with a circumferential tread, a bead arranged at the radially inner portion of each of the sidewalls, each bead comprising a seat and an outer flange which are intended to come into contact with the rim. The bead seat has a generatrix, the axially inner end of which lies on a circle of diameter greater than the diameter of the circle on which the axially outer end is located. A carcass-type reinforcement structure extends substantially radially from each of the beads, along the sidewalls, towards the crown zone, such bead being reinforced by a substantially radial arrangement of circumferential cords arranged in stacks. A portion of the carcass-type reinforcement structure is arranged in the immediate vicinity of at least one portion of a stack, and the space between these portions is generally occupied by a rubber mix of high elasticity modulus.

Description

technical field [0001] The invention relates to a tire for a vehicle wheel, in which at least one bead has a generatrix whose axially inner end is located on a circular ring with a diameter greater than that of its axially outer end, this type of construction is particularly Suitable for new types of tires, which can be used within certain limits for low pressure, even zero pressure and virtually zero pressure, eliminating the risk of the tire being separated from the rim on which it is installed. This concept is often referred to by the term "extended mobility". Background technique [0002] Tire manufacturers have long attempted to develop a tire that would not present any source of potential risk or danger in the event of an abnormal drop in pressure, or even a complete loss. One of the difficulties encountered is the running problem of flat tires or tires with very low pressure. In fact, when conventional tires are driven at very low or completely lost pressure, there ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C15/05B60C15/00B60C15/02B60C15/024B60C15/06B60C17/00
CPCB60C3/06B60C15/06B60C15/0236B60C15/0018B60C15/0247B60C9/0207B60C15/024Y10T152/10855Y10T152/10846Y10T152/10819
Inventor P·科斯塔佩拉里亚B·盖里农
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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