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Studded tyre

A technology of studs and tires, applied in the direction of tire parts, tire tread/tread pattern, vehicle parts, etc.

Active Publication Date: 2014-08-20
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although this approach has allowed to significantly improve the grip of tires including studs for driving on ice, there is still some room to improve the trade-off between the level of grip on ice and the retention of the studs when the tire is used on asphalt. middle

Method used

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Examples

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Embodiment Construction

[0032] When the term "radial" is used, it is intended to distinguish between the many different uses of the word by those skilled in the art. First, the expression refers to the radius of the tire. This means that a point P1 is said to be "radially inside" a point P2 (or "radially inside" a point P2) if it is closer to the axis of rotation of the tire than a point P2. Conversely, a point P3 is said to be "radially outside" a point P4 (or "radially outside" point 4) if it is farther from the axis of rotation of the tire than point P4 is. When traveling in the direction of a smaller (or larger) radius, then the travel is said to be "radially inward (or outward)". The stated meaning of this term also applies when referring to radial distances.

[0033] In contrast, a thread or reinforcement is said to be "radial" when its reinforcing elements form an angle with the circumferential direction greater than or equal to 80° and less than or equal to 90°. In this context it should b...

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PUM

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Abstract

Tyre with studs designed to roll on ground that may be covered with ice, comprising: a tread made of at least one rubber compound and having a tread surface, a plurality of housings opening onto the tread surface via an orifice and containing a stud, the orifice having a maximum dimension DO on the tread surface when the stud is in the housing; each stud comprising: a base, designed to anchor the stud in the tread; a tip, designed to project from the tread in order to come into contact with the ice; a body connecting the base and the tip, the body having an axis of symmetry; and a longitudinal axis passing through the axis of symmetry of the body; wherein the tread surrounding the stud forms an anchoring platform for the stud, this platform in turn being surrounded by a cavity opening onto the tread surface so that the volume of recess opening onto the tread surface in a radius greater than or equal to DO / 2 and less than or equal to DO / 2 + 2 mm about the longitudinal axis of the stud is less than or equal to 20 mm3; and the volume of recess opening onto the tread surface in a radius greater than or equal to DO / 2 + 2 mm and less than or equal to DO / 2 + 4 mm about the longitudinal axis of the stud is greater than or equal to 60 mm3 and less than or equal to 100 mm3.

Description

technical field [0001] The invention relates to a tire comprising studs ("studded tyre") for driving on ice. Background technique [0002] Studded tires have recognized advantages in terms of performance in winter driving conditions, such as when driving on icy road surfaces. The contact with the ice, and more particularly the way the studs dig into the ice, compensates for the reduced grip observed at the tread pattern of the tire tread. The cleats scrape the ice and create extra force on the ice. [0003] One of the problems with the use of studded tires is that the grip values ​​reach their upper limit, which is lower than those expected. [0004] To overcome said problem, it has been proposed (see for example patent applications WO 2009 / 147046 and WO 2009 / 147047) to provide grooves or cavities in the tread close to the stud, so that scraping ice on the stud can be removed more quickly. Any debris or particles of ice produced during the As these debris are removed mor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/16
CPCB60C11/1637B60C11/16B60C11/1656B60C11/1625
Inventor D·法宾I·巴特尼尼
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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