Wear indicator for a tire
AssigneeMichelin Recherche et Technique S.A.
InventorsPreston Kemp, Benoit Foucher
Life of this patent
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Abstract
A tire tread comprising a rolling surface and at least one wear indicator formed by at least one cavity which opens onto the rolling surface, wherein the geometrical shape of the trace of the cavity on the rolling surface changes as a function of the wear level of the tread and wherein the geometrical shape of said trace is an analogical expression of the tread's wear level.
Claims17
A tire tread comprising a rolling surface and at least one wear indicator formed by at least one cavity which opens onto the rolling surface, wherein the geometrical shape of the trace of the cavity on the rolling surface changes as a function of the wear level of the tread and wherein the geometrical shape of said trace is an analogical expression of the tread's wear level.
A molding element for molding a cavity in the rolling surface of a tire, this molding element having a first part designed to anchor the molding element in the mould for molding the rolling surface and a second part designed to mould the cavity, with a plane P0 separating the said first and second parts, wherein the geometrical shape of the trace of the molding element in a plane P1 parallel to the plane P0 changes as a function of the distance between the planes P0 and P1, and the difference between the trace area in a plane P1 parallel to the plane P0 and the trace area in another plane P2 parallel to the plane P0 is a substantially linear function of the distance between the planes P1 and P2.
Dependencies are inferred from the claim text.