Tire with low zone comprising a concentration of cords
AssigneeMichelin Recherche et Technique S.A.
InventorsPedro Costa Pereira, Bernard Guerinon
Life of this patent
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Abstract
A tire comprising at least one reinforcement structure of the carcass type anchored on either side of the tire in a bead, the base of which bead is intended to be mounted on a rim seat, the reinforcement structure extending circumferentially from the bead towards the sidewall, at least one arrangement of main cords along a substantially circumferential path being arranged substantially adjacent to the structure, the arrangement of the cords of the at least one arrangement being such that the number of main cords arranged on the axially inner side relative to the structure is greater than the number of main cords arranged on the axially outer side relative to the structure.
Claims34
A tire, comprising at least one reinforcement structure anchored on either side of the tire in a bead, the base of which bead is intended to be mounted on a rim seat, each bead being extended radially towards the outside by a sidewall and comprising an axial bearing zone extending substantially between the base of the bead and a radial position of the bead substantially corresponding to the position of the radial edge of the hook of a rim for which said tire is adapted, the sidewalls radially towards the outside joining a tread, on the circumference of the tire the reinforcement structure extending from an end portion of said structure, arranged in the bead, towards said sidewall, at least one arrangement of main cords along a substantially circumferential path being arranged substantially adjacent to said end portion so as to form an anchoring zone, the arrangement of the cords of said at least one arrangement being such that the number of main cords arranged on the axially inner side relative to said structure is greater than the number of main cords arranged on the axially outer side relative to said structure, said main cords extending substantially radially to the inside of said axial bearing zone.
A tire, comprising at least one reinforcement structure anchored on either side of the tire in a bead, the base of which bead is intended to be mounted on a rim seat, each bead being extended radially towards the outside by a sidewall and comprising a zone of axial bearing extending substantially between the base of the bead and a radial position of the bead substantially corresponding to the position of the radial edge of the hook of a rim for which said tire is adapted, the sidewalls radially towards the outside joining a tread, on the circumference of the tire the reinforcement structure extending from an end portion of said structure, arranged in the bead, towards said sidewall, at least in the end portion said structure being axially separated into at least two portions, at least one arrangement of main cords along a substantially circumferential path being arranged substantially adjacent to at least one of the portions of said structure so as to form an anchoring zone, the arrangement of the cords of said at least one arrangement being such that the surface density of main cords arranged on the axially inner side relative to said structure is greater than the surface density of main cords arranged on the axially outer side relative to said structure, said main cords extending substantially radially to the inside of said zone of axial bearing.
A tire, comprising at least one reinforcement structure of the carcass type anchored on either side of the tire in a bead, the base of which bead is intended to be mounted on a rim seat, each bead being extended radially towards the outside by a sidewall, and comprising an axial bearing zone extending substantially between the bead base and a radial position of said bead substantially corresponding to the position of the radial edge of the hook of a rim for which said tire is adapted, the sidewalls radially towards the outside joining a tread, on the circumference of the tire the reinforcement structure extending from an end portion of said structure, arranged in the bead, towards said sidewall, at least one arrangement of main cords along a substantially circumferential path being arranged substantially adjacent to said end portion, each cord arranged on the axially inner side relative to said structure having a Young's modulus EI and a surface SI and each cord arranged on the axially outer side relative to said structure having a Young's modulus Ee and a surface Se, the arrangement of the cords of said at least one arrangement being such that Σ(EI×SI)int>Σ(Ee×Se)ext, said main cords extending substantially radially within said axial bearing zone.
Dependencies are inferred from the claim text.