Invention Grant
- Patent Title: Tread with variable chamfers
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Application No.: US14363625Application Date: 2012-11-27
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Publication No.: US09789737B2Publication Date: 2017-10-17
- Inventor: Frédéric Bourgeois , François-Xavier Bruneau
- Applicant: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN , MICHELIN RECHERCHE ET TECHNIQUE S.A.
- 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: Dickinson Wright, PLLC
- Priority: FR1161355 20111208
- International Application: PCT/EP2012/073670 WO 20121127
- International Announcement: WO2013/083429 WO 20130613
- Main IPC: B60C11/13
- IPC: B60C11/13 ; B60C11/11 ; B60C11/12 ; B60C11/03

Abstract:
Tread having a plurality of generally circumferentially orientated grooves delimiting a plurality of relief elements, this tread further comprising a plurality of cut-outs in the form of transversely orientated grooves and/or slits, each relief element comprising a contact face intended to come into contact with the road and lateral faces cutting this contact face along edges intended to come into contact with a road during running, this tread having chamfers on at least a plurality of transverse edges of the relief elements, this tread having, in straight-line running, a total contact surface S comprising a part Sc in which all the transverse edges have chamfers and a part Snc in which all the transverse edges are free of chamfers, this tread having, in a cornering maneuver corresponding to a transverse acceleration of 0.3 g (where g is the acceleration due to gravity), a total footprint surface S* formed by a part Sc* comprising chamfers on all the transverse edges of its relief elements and a part Snc* free of any chamfer, this tread being such that the ratio Snc/Sc is equal to not more than 2% and that the ratio Snc*/Sc* is equal to or greater than 10%.
Public/Granted literature
- US20140345764A1 TREAD WITH ARIABLE CHAMFERS Public/Granted day:2014-11-27
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