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Variable height grooves in multiple wear layer treads for retreaded tires

A technology of tire tread and wear layer, applied in the direction of tire tread/tread pattern, tire parts, tires, etc., can solve the problem of inability to use the tread thickness and so on

Inactive Publication Date: 2014-08-13
MICHELIN RECH & TECH SA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some cases, however, it may not be possible to utilize the entire tread thickness, because the distance in the radial direction from the bottom of the groove on the top side to the top of the groove on the bottom side must be greater than normally must exist to prevent the tire Minimum amount of skid depth scrapped

Method used

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  • Variable height grooves in multiple wear layer treads for retreaded tires
  • Variable height grooves in multiple wear layer treads for retreaded tires
  • Variable height grooves in multiple wear layer treads for retreaded tires

Examples

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Embodiment Construction

[0034] Certain embodiments of the present invention provide tire treads for use in the cold retreading or manufacture of retreaded tires. In cold retreading, the tread is molded, eg in a flat mold, and pre-cured before being applied to the tire carcass. The new tread may be fully or partially cured to form a pre-cured tread before it is applied to the tire carcass. Subsequently, the pre-cured tread is deployed or placed on top of a pre-existing or used tire carcass. The tire carcass may be prepared by any known means to receive the new tread, such as by buffing, grinding, buffing or cutting the previous tread from the carcass. Prior to applying the tread to the tire carcass, a bonding material may be disposed between the new tread and the tire carcass to promote adhesion and bonding between the tread and the tire carcass. The bonding material may include any known material suitable for its intended purpose of bonding the new tread to the tire carcass. For example, the joini...

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PUM

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Abstract

Particular embodiments of the present invention include multi-wear layer treads having variable depth grooves for retreaded tires, retreaded tires, and methods of forming retreaded tires. In particular embodiments, such multi-wear layer tire treads include a thickness bounded depthwise by a top side configured to engage a ground surface during tire operation and a bottom side configured for attachment to a tire carcass, the thickness extending laterally between opposing side edges and longitudinally in a lengthwise direction of the tread. Such tread may further include a top groove extending a variable depth into the tread thickness from the top side, the top groove having a groove bottom that varies depthwise within the tread thickness to form multiple wear layers. In other embodiments, top grooves may or may not be variable depth grooves, while the tread further include a bottom groove extending a variable depth into the tread thickness from the bottom side.

Description

technical field [0001] The present invention relates generally to treads for retreading tires, and more particularly to a precured tread having a plurality of wear layers with grooves disposed along the underside of the tread. Background technique [0002] When retreading tires, it is known to replace the tread with new precured tread. To this end, the tread is generally formed with grooves arranged along the outer side of the tread. In certain cases, grooves may also be arranged along the inside or bottom side of the tread to provide one or more treadwear layers in which different tread characteristics occur as the tread wears down to the thickness of the tread in the depth direction be exposed. [0003] When the retreaded tire only comprises top grooves, the grooves in the retreaded tire are generally at a constant ( That is, a fixed) depth extends into the tread. Otherwise, however, the depth is constant. Thus, as the groove wears a fixed, constant distance from the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/03
CPCB60C2011/0353B60C11/02B60C11/03B29D30/56B60C11/0309B60C11/13B60C2011/0355
Inventor E·B·科尔比D·G·齐拉斯C·E·扎拉克
Owner MICHELIN RECH & TECH SA