B - Operations – Transporting – 60 – C
Patent
B - Operations, Transporting
60
C
B60C 11/03 (2006.01)
Patent
CA 2724657
Tyre tread for civil engineering works machine, this tread having a rolling surface (10) designed to be in contact with the ground, this tread having a central part (21) bounded by grooves of generally circumferential orientation (3), these grooves defining the axially outward lateral parts (22) of the central part (21), each lateral part (22) being provided with a plurality of transverse grooves (6) defining a plurality of blocks (7), the transverse grooves (6) having a cross section of minimal area (ST) and being distributed approximately uniformly in the circumferential direction, this tread being characterized in that the central part (21) is provided with a plurality of channels (51) extending transversely underneath the rolling surface (10) all the way through said central part (21), each channel (51) comprising a first end and a second end (52, 53), the first and second ends communicating directly with the grooves (3) of generally circumferential orientation, at least one end of each channel communicating directly with a transverse groove (6) in the shoulder parts (22), and in that each channel (51) has a cross-sectional area (SC) equal to or greater than 5% of the minimal cross-sectional area (ST) of the transverse groove (6) with which it communicates. Tyre provided with such a tread.
Tyre tread for civil engineering works machine, this tread having a rolling surface (10) designed to be in contact with the ground, this tread having a central part (21) bounded by grooves of generally circumferential orientation (3), these grooves defining the axially outward lateral parts (22) of the central part (21), each lateral part (22) being provided with a plurality of transverse grooves (6) defining a plurality of blocks (7), the transverse grooves (6) having a cross section of minimal area (ST) and being distributed approximately uniformly in the circumferential direction, this tread being characterized in that the central part (21) is provided with a plurality of channels (5 1) extending transversely underneath the rolling surface (10) all the way through said central part (21), each channel (51) comprising a first end and a second end (52, 53), the first and second ends communicating directly with the grooves (3) of generally circumferential orientation, at least one end of each channel communicating directly with a transverse groove (6) in the shoulder parts (22), and in that each channel (51) has a cross-sectional area (SC) equal to or greater than 5% of the minimal cross-sectional area (ST) of the transverse groove (6) with which it communicates. Tyre provided with such a tread. Bande de roulement de pneu pour engin de travaux génie civil, cette bande de roulement ayant une surface de roulement (10) destinée à venir en contact avec le sol, cette bande de roulement comportant une partie centrale (21) délimitée par des ramures d'orientation générale circonférentielle (3), ces ramures délimitant des parties latérales (22) axialement vers l'extérieur de la partie centrale (21), chaque partie latérale (22) étant pourvue d'une pluralité de ramures transversales (6) délimitant une pluralité de blocs (7), les ramures transversales (6) ayant une section transversale de surface minimale (ST) et étant réparties sensiblement de manière uniforme dans la direction circonférentielle, cette bande de roulement étant caractérisée en ce que la partie centrale (21) est pourvue d'une pluralité de canaux (51) s'étendant transversalement sous la surface de roulement (10) et traversant de part en part ladite partie centrale (21), chaque canal (51) comprenant une première et une seconde extrémité (52, 53), ces première et deuxième extrémités débouchant dans les rainures d'orientation générale circonférentielle (3), au moins une extrémité de chaque canal débouchant dans une rainure transversale (6) des parties épaules (22), et en ce que chaque canal (51) a une surface de section transverse (SC) au moins égale à 5 % de la surface de la section minimale (ST) de la rainure transversale (6) dans laquelle il débouche. Pneumatique pourvu d'une telle bande de roulement.
Bijaoui Denis
Callamand Stephane
Michelin Recherche Et Technique S.a.
Robic
LandOfFree
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