Tire with circumferentially oriented reinforcements
AssigneeMichelin Recherche et Technique S.A.
InventorsDavid Jardine, Pedro Costa Pereira, Philippe Esnault, Jean-Claude Goutte, Francois Vizet
Life of this patent
Estimating the term…
Abstract
A tire whose crown has a ply of bimodulus reinforcements circumferentially oriented and spiral-wound, the ply being so arranged that, in the new tire, its reinforcements have a high-temperature contraction potential identical to that of the adhesive yarn before it is introduction in the tire. The tire has an appreciably diminished running noise.
Claims22
A tire having a crown extended by two sidewalls and two beads, with a carcass anchored in both beads, said crown comprising:
- at least one reinforcing ply having of parallel reinforcements and oriented at an angle α relative to the circumferential direction ranging between 10 and 45 degrees, and
- at least one ply of textile reinforcements circumferentially oriented and spiral-wound, characterized in that in said tire, when new, said circumferentially oriented reinforcements possess an initial modulus less than 900 cN/tex and develop a stress under 3% deformation exceeding 12 cN/tex.
A tire according to claimed in which said circumferentially oriented reinforcements have an adhesive titer greater than 250 tex and less than 800 tex.
A tire according to claim 12, in which α1 is greater than 26 degrees and less than 38 degrees.
A tire having a crown extended by two sidewalls and two beads, with a carcass anchored in both beads, said crown comprising:
- at least one reinforcing ply having parallel reinforcements and oriented at an angle α relative to the circumferential direction ranging between 10 and 45 degrees, and
- at least one ply of textile reinforcements circumferentially oriented and spiral-wound, characterized in that said circumferentially oriented reinforcements possess an initial modulus less than 900 cN/tex and develop a stress under 3% deformation above 12 cN/tex and in that in the tire, when new, said circumferentially oriented reinforcements have, whatever their axial position, a high-temperature contraction potential (CS) less than or equal to the high-temperature contraction potential of said reinforcements before their incorporation in the tire.
A tire having a crown extended by two sidewalls and two beads, with a carcass anchored in both beads, said crown comprising:
- at least one reinforcing ply having parallel reinforcements and oriented at an angle α relative to the circumferential direction ranging between 10 and 45 degrees, and
- at least one ply of textile reinforcements circumferentially oriented and spiral-wound, characterized in that said circumferentially oriented reinforcements possess an initial modulus less than 900 cN/tex and develop a stress under 3% deformation above 12 cN/tex and in that said circumferentially oriented reinforcements are spiral-wound with laying diameters substantially corresponding, over the whole width of the crown, to the final diameters of said reinforcements in the tire after vulcanization.
Dependencies are inferred from the claim text.