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US 11,766,900 B2Granted
Tire having a conductive cord
AssigneeBridgestone Americas Tire Operations, LLC
InventorsChristopher R. Baker, Ruben L. Madrid, Justin M. Gehres, Kathleen A. Clemmer
Life of this patent
Estimating the term…
Abstract
A tire includes at least one annular structure configured to interface with a wheel. The tire also includes a circumferential tread disposed in a crown region of the tire and an intermediate elastomeric layer having a conductive bleeder cord. The conductive bleeder cord extends from the annular structure to at least a middle third of a tread width and includes a metallic component that conducts electric charge and a textile component that permits gas evacuation.
Claims9
A tire comprising:
- a first annular bead;
- a first abrasion area, wherein the first abrasion area has a resistivity of at least 5.9×107 ohm-cm;
- a second annular bead;
- a second abrasion area, wherein the second abrasion area has a resistivity of at least 5.9×107 ohm-cm;
- a body ply extending between the first annular bead and the second annular bead, wherein the body ply contains reinforcement cords;
- a circumferential belt disposed radially upward of the body ply and extending axially across a portion of the body ply;
- at least one cap ply disposed radially upward of the circumferential belt and extending axially across a portion of the circumferential belt, wherein the at least one cap ply has a resistivity of at least 13.0×107 ohm-cm;
- a circumferential tread disposed radially upward of the at least one cap ply and extending axially across the at least one cap ply, wherein the circumferential tread has resistivity of at least 13.7×107 ohm-cm;
- a first sidewall extending between the first annular bead and a first shoulder, the first shoulder being associated with the circumferential tread, wherein the first sidewall has a resistivity of at least 11.9×107 ohm-cm;
- a second sidewall extending between the second annular bead and a second shoulder, the second shoulder being associated with the circumferential tread, wherein the second sidewall has a resistivity of at least 11.9×107 ohm-cm;
- a plurality of bleeder cords associated with the body ply and disposed circumferentially about the tire and radially between the circumferential tread and the body ply, wherein the plurality of bleeder cords includes a plurality of non-conductive bleeder cords, and wherein the plurality of bleeder cords further includes at least one conductive bleeder cord formed of a stainless steel-cotton blend yarn having a stainless steel-to-cotton ratio between 70:30 and 85:15, wherein the stainless steel-cotton blend yarn has a linear mass density between 320 and 450 tex, and wherein the at least one conductive bleeder cord extends from one of the beads and terminates in a middle third of a tread width.
8 more elements
Dependencies are inferred from the claim text.