Compagnie Generale Des Etablissements Michelin

Michelin Recherche Et Technique S.a.

Alexandra Curat

Olivier Ropars

Florence Tran

Jean-Luc Cabioch

Christophe Laurent

Eric Francois

Romain Bouchet

Anthony Monod

Eduardo Anton-Antolin

Jean-luc Cabioch

Benjamin Vilpert

Agricultural vehicle tire having tread () with bearing surface () on which main lugs () and shorter secondary lugs () are formed on each side of the equatorial mid-plane (XX′), each secondary lug () interposed between two main lugs (). The main lugs () and secondary lugs () make up, in the radial direction, a lens () of a first material, each lens () surmounted by a second material extending to the contact face of the main lugs and the secondary lugs. The viscous modulus G′of the first material is at most 60% of the viscous modulus G′of the second material. The complex modulus G′of the first material differs from the complex modulus G′of the second material, the difference between these complex moduli being at most 30% of the complex modulus G′of the second material.

Tread structure of an agricultural vehicle tire

Tire tread with main lugs extending from a tread edge to the equatorial mid-plane on each side of which are a plurality of secondary lugs () extending over 40% to 60% of the tread half-width, each secondary lug () having a width 20% to 40% of the shortest distance between two main lugs (). Each main lug () comprises, on its trailing lateral face (), a widened portion () of width Dextending over an axial distance from a tread edge and being joined to the main lug by end face () inclined at an angle Bbetween 18 degrees and 25 degrees to the circumferential direction. Each secondary lug () has end face () inclined at an angle Swith the same orientation as angle Bwith respect to the circumferential direction, angle Sbeing between 18 degrees and 25 degrees.

Agricultural vehicle tire

Tire tread

Growing community of inventors

Clermont-Ferrand, France

Alexandra Curat