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Runflat tyre having optimized carcass path

A tire and carcass technology, applied to the reinforcement layer of pneumatic tires, special tires, tire parts, etc., can solve the problems of structural design restrictions and other problems, and achieve the effect of simplifying maintenance and maintenance

Inactive Publication Date: 2005-06-22
MICHELIN RECH & TECH SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This state of stress and the previously mentioned discontinuity necessitate the coordination of tire performance between inflated and deflated states, resulting in structural design constraints

Method used

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  • Runflat tyre having optimized carcass path
  • Runflat tyre having optimized carcass path
  • Runflat tyre having optimized carcass path

Examples

Experimental program
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Embodiment Construction

[0031] When a tire mounted on a rim is fully supported on the ground, it is subject to deformation during running, especially during run-flat, which increases or decreases the pressure generated in the carcass . In the case of conventional designs, the above-mentioned deformation phenomena bring the carcass into a state of compressive stress, either when the carcass is turned up or when one or more carcasses are arranged axially. This state of compressive stress may occur when a carcass side is positioned anywhere in the carcass structure between the neutral axis of bending and the origin of curvature of the neutral axis. Conversely, a carcass flank disposed axially and radially outwards from the neutral axis and its origin of curvature yields to the increased pressure during deformation. Materials commonly used for tire carcass reinforcement are generally more resistant to cyclic tensile stress than to cyclic compressive stress. refer to figure 1 In the tire 20 shown in , ...

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Abstract

The outermost carcass of the tire involved in the present invention has an optimized channel designed to maximize the range of tensile stresses in the sidewall and bead portions of the tire. The present invention also provides an independent reinforcing structure in the bead portion, which can fix single or multiple carcass on the bead, and can also keep the bead on the assembled rim during run-flat running, and said The fixed reinforcement also simplifies the process of servicing and maintaining the ideal carcass profile.

Description

technical field [0001] The present invention relates to a tire, in particular a pneumatic tire capable of continuing its mobility in the event of a deflation. Background technique [0002] Various tire constructions have been proposed for inflated run-flat tires, that is, tires capable of normal running in an inflated state but also allowing some limited running in a deflated state . The construction of such tires generally consists of one or more carcasses turned up radially about one or more bead wires disposed on each bead. In order to achieve the desired maneuverability under run-flat conditions, many of these tires also use sidewall construction, either between the carcass plies or between the carcass plies and the inner tire insert. Incorporating additional layers of rubber material to be reinforced and thickened. exist figure 1 An example of such a tire is shown in . [0003] It is also important to keep a tire running flat on the rim. Many...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C17/00B60C3/04B29D30/08B60C9/02B60C9/08B60C13/00B60C15/00B60C15/06
CPCB60C3/04B60C15/0018B60C17/0018B60C9/02
Inventor R·C·科特雷尔
Owner MICHELIN RECH & TECH SA
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