Tire comprising a carcass reinforcement having cables and capillary tubes
AssigneesCompagnie Generale Des Etablissements Michelin, Michelin Recherche et Technique S.A.
InventorAlain Domingo
Life of this patent
Estimating the term…
Abstract
A tire having a radial carcass reinforcement, having at least one layer of reinforcing elements, said tire comprising a crown reinforcement, which is itself covered radially with a tread, said tread being joined to two beads via two sidewalls, wherein at least 90% of the reinforcing elements of at least one layer of the carcass reinforcement are non-wrapped metal cords having in what is called the permeability test a flow rate of less than 20 cm3/min, wherein at least 1% of the reinforcing elements of said at least one layer of the carcass reinforcement are capillary tubes and wherein, in a plane of section perpendicular to the axis of the capillary tube, the ratio of the open area to the area of material is greater than 0.4%.
Claims15
A tire comprising:
- a radial carcass reinforcement having at least one layer of reinforcing elements;
- a crown reinforcement covered radially with a tread;
- and
- said tread being joined to two beads via two sidewalls,
- wherein at least 90% of the reinforcing elements of the at least one layer of the carcass reinforcement are non-wrapped metal cords having a flow rate of less than 20 cm3/min in a permeability test,
- wherein at least 1% of the reinforcing elements of the at least one layer of the carcass reinforcement are capillary tubes,
- wherein, in a plane of section perpendicular to the axis of each of the capillary tubes, a ratio of an open area to an area of material is greater than 0.4%, and
- wherein the capillary tubes are in the same plane and parallel to the non-wrapped metal cords.
A tire comprising:
- a radial carcass reinforcement having at least one layer of reinforcing elements;
- a crown reinforcement covered radially with a tread;
- and
- said tread being joined to two beads via two sidewalls,
- wherein at least 90% of the reinforcing elements of the at least one layer of the carcass reinforcement are non-wrapped metal cords having at least two layers, at least one inner layer being sheathed with a layer consisting of a polymeric composition having a crosslinkable or crosslinked rubber composition,
- wherein at least 1% of the reinforcing elements of said at least one layer of the carcass reinforcement are capillary tubes,
- wherein, in a plane of section perpendicular to the axis of each of the capillary tubes, a ratio of an open area to an area of material is greater than 0.4%, and
- wherein the capillary tubes are in the same plane and parallel to the non-wrapped metal cords.
Dependencies are inferred from the claim text.