US 12,296,624 B2
Tire comprising a radiofrequency transponder
Julien Destraves, Clermont-Ferrand (FR); Pierre Guinault, Clermont-Ferrand (FR); and Michel Robert, Clermont-Ferrand (FR)
Assigned to COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, Clermont-Ferrand (FR)
Appl. No. 17/782,275
Filed by COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, Clermont-Ferrand (FR)
PCT Filed Dec. 2, 2020, PCT No. PCT/FR2020/052242
§ 371(c)(1), (2) Date Jun. 3, 2022,
PCT Pub. No. WO2021/111075, PCT Pub. Date Jun. 10, 2021.
Claims priority of application No. 1913726 (FR), filed on Dec. 4, 2019.
Prior Publication US 2023/0014878 A1, Jan. 19, 2023
Int. Cl. B60C 19/00 (2006.01); B29D 30/00 (2006.01); B60C 9/04 (2006.01); B60C 11/24 (2006.01); H01Q 1/22 (2006.01)
CPC B60C 19/00 (2013.01) [B29D 30/0061 (2013.01); B60C 9/04 (2013.01); H01Q 1/2241 (2013.01); B29D 2030/0083 (2013.01); B60C 2019/004 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A tire casing in a shape of a torus around a reference axis equipped with a passive radiofrequency transponder, the tire casing comprising:
a crown block comprising a crown reinforcement having an axial end at each of its edges and a tread, joined at each of its axial ends to a bead having an inner end, located axially and radially on an inside of the bead with respect to the reference axis, via a sidewall;
a carcass reinforcement, comprising at least one carcass reinforcement layer formed of reinforcing elements that are mutually parallel, the reinforcing elements defining a reinforcement direction, and which are inserted between two skim layers of elastomeric compound,
the at least one carcass reinforcement layer being anchored in each of the beads by being turned up around an annular bead wire to form a main part of the at least one carcass reinforcement layer, extending from one bead wire to another bead wire and situated radially on an inside with respect to the crown block, and a turn-up of the at least one carcass reinforcement layer in each of the beads;
a second layer of elastomer compound forming an exterior surface of the tire casing in a region of the bead, the second layer of elastomer compound being intended to come into contact with a rim;
a third layer of elastomer compound situated radially on an outside in contact with the second layer of elastomer compound forming an exterior surface of the sidewall; and
the passive radiofrequency transponder, comprising a main core defining a first longitudinal axis, a first primary cover filament wound in turns around the main core defining a winding diameter D and an electrical insulation device disposed radially on an outside of the first primary cover filament with respect to the first longitudinal axis,
the first primary cover filament comprising at least two conductive filamentary elements having a diameter between 0.05 and 0.15 millimeters, galvanically connected to at least one electronic chip comprising a radiofrequency transmission-reception component, and
the main core having a stiffness lower than a maximum stiffness of the first primary cover filament,
wherein the electrical insulation device has a mean relative dielectric permittivity less than or equal to 10 over a thickness greater than or equal to one sixth of the winding diameter D of the first primary cover filament,
wherein the passive radiofrequency transponder, in its longitudinal direction, is located in line with at least two reinforcing elements of the main part of the at least one carcass reinforcement layer,
wherein the passive radiofrequency transponder is located axially on an outside of the inner end of the bead and radially between a radially outermost end of the bead wire and the axial end of the crown reinforcement, and
wherein the thickness of elastomer compound separating an outer cover filament of the passive radiofrequency transponder, located radially outermost with respect to the first longitudinal axis, and the reinforcing elements is greater than 0.5 millimeters.