Invention Grant
- Patent Title: Tire tread having a plurality of wear layers
- Patent Title (中): 轮胎胎面具有多个耐磨层
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Application No.: US13881797Application Date: 2011-10-24
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Publication No.: US09387728B2Publication Date: 2016-07-12
- Inventor: Jeffrey Thomas Warfford , Damon Lee Christenbury , Robert Cecil Lawson , Timothy A. White
- Applicant: Jeffrey Thomas Warfford , Damon Lee Christenbury , Robert Cecil Lawson , Timothy A. White
- Applicant Address: FR CLermont-Ferrand CH Granges-Paccot
- Assignee: Compagnie Generale Des Etablissements Michelin,Michelin Recherche et Technique S.A.
- Current Assignee: Compagnie Generale Des Etablissements Michelin,Michelin Recherche et Technique S.A.
- Current Assignee Address: FR CLermont-Ferrand CH Granges-Paccot
- Agency: Hahn Loeser & Parks LLP
- Agent Bret A. Hrivnak
- International Application: PCT/US2011/057546 WO 20111024
- International Announcement: WO2012/058171 WO 20120503
- Main IPC: B60C11/13
- IPC: B60C11/13 ; B60C11/12 ; B60C11/03 ; B60C11/00

Abstract:
Particular embodiments of the present invention include a multi-stage tire tread having two or more wear layers comprising an outer wear layer and one or more inner wear layers arranged within the thickness of the tread below the outer wear layer. One or more outer grooves are arranged within the outer wear layer, while one or more inner grooves arranged within at least one of the one or more inner wear layers. The tread further includes a volumetric void ratio equal to approximately 0.25 to 0.40 in the unworn condition and approximately 0.25 to 0.40 in a worn condition where the outer, ground-engaging side is arranged along one of the inner wear layers in the worn condition, the tread further having a contact surface ratio equal to approximately 0.66-0.72 in the unworn condition and approximately 0.56-0.66 in the worn condition.
Public/Granted literature
- US20130213542A1 TIRE TREAD HAVING A PLURALITY OF WEAR LAYERS Public/Granted day:2013-08-22
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