# US 10,864,780 B2 · Bead wire for a tire, tire and manufacturing method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,864,780 B2 - Document ID: US10864780B2 - Status: Granted - Kind: B2 - Application number: 16/031,674 - Filed: 2018-07-10 - Published: 2019-01-31 - Granted: 2020-12-15 - Earliest claimed: 2013-06-28 - Assignees: Compagnie Generale Des Etablissements Michelin - Applicants: Compagnie Generale Des Etablissements Michelin - Inventors: Michel Giraud; Anne-Lise Muller; Jérõme Gravier - Web page: https://patentgrep.com/patent/US10864780B2 ## CPC - B60C 15/04: Bead cores - B29D 30/08: Building tyres - B60C 9/02: Carcasses - D02G 3/48: Tyre cords {(tyre reinforcements B60C9/00; metal cords for reinforcing rubber or plastic articles D07B1/0606)} - D07B 1/0633: {having a multiple-layer configuration} - B60C 2015/046: {Cable cores, i.e. cores made-up of twisted wires} - B60C 2015/048: {Polygonal cores characterised by the winding sequence} - B60C: VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES - B29D: PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE (making granules B29B9/00; making preforms B29B11/00) - D02G: CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS - D07B: ROPES OR CABLES IN GENERAL (joining ropes or cables to one another or to other objects B65H69/00, F16G11/00; {mountaineering ropes A63B29/02}; mechanical finishing or dressing of ropes D02J; {braiding D04C}; decorative ropes or cords D04D; suspension cables for bridges E01D19/16; specially adapted for driving, or for being driven by, pulleys or other gearing elements F16G9/00; electric cables or joints insofar as electrical aspects are essential H01B, H01R) ## Abstract The bead wire (52) comprises several windings of wire and a basic hexagonal bead wire (56) comprising: two axially and radially external lateral rows (F1, F2) of N2 windings, two axially external and radially internal lateral rows (F3, F4) of N2 windings, where N1=N2+1 or N1=N2, two junctions (J1, J2), each formed by a winding that an axially and radially external lateral row (F1, F2) and an axially external and radially internal lateral row (F3, F4), have in common, each winding in common having no winding of wire axially on the outside of it. The bead wire (52) comprises two axially and radially external additional lateral rows (A1, A2) of N3 windings substantially parallel respectively to each axially and radially external lateral row (F1, F2). ## Claims ### Claim 1 A bead wire for a tire substantially of revolution about an axis comprising several windings of at least one wire which are arranged axially next to one another over N layers radially superposed on one another, comprising: a basic hexagonal bead wire comprising: a radially external layer of N1 windings, a radially internal layer of N1 windings, two axially and radially external lateral rows of N2 windings axially opposite one another, two axially external and radially internal lateral rows of N2 windings axially opposite one another, with N1=N2 +1 or N1=N2, and two junctions each one formed by a winding that an axially and radially external lateral row and an axially external and radially internal lateral row have in common, each winding in common forming each junction having no winding of the bead wire axially on the outside of it; and additional windings comprising: axially external and radially internal additional windings, the axially external and radially internal additional windings consisting exclusively of two pairs of axially external and radially internal additional lateral rows, each of the two pairs of axially external and radially internal additional lateral rows having a radially internal winding radially aligned with the radially internal layer of the basic hexagonal bead wire. ### Claim 2 (depends on 1) The bead wire according to claim 1, the additional windings further comprising: two axially and radially external additional lateral rows of N3 windings axially opposite one another, wherein each radially external winding of each axially and radially external additional lateral row is radially substantially aligned with the radially external layer of the basic hexagonal bead wire. ### Claim 3 (depends on 2) The bead wire according to claim 2, wherein, with each axially and radially external additional lateral row comprising N3 windings, N3+1=N2 or N3+2=N2. ### Claim 4 (depends on 1) The bead wire according to claim 1, further comprising at least one axially and radially external additional covering of windings in the overall shape of a U. ### Claim 5 (depends on 4) The bead wire according to claim 4, wherein the axially and radially external additional covering comprises: a radially external additional layer of N4 windings, and substantially parallel to the radially external layer of the basic hexagonal bead wire, and at least two axially and radially external additional lateral rows. ### Claim 6 (depends on 5) The bead wire according to claim 5, wherein N4=N1+1. ### Claim 7 (depends on 1) The bead wire according to claim 1, wherein max(Li)=N-1, max(Li)=N or max(Li)=N+1 where Li is the number of windings of each layer Ci, i varying from 1 to N inclusive. ### Claim 8 A bead wire for a tire substantially of revolution about an axis comprising several windings of at least one wire which are arranged axially next to one another over N layers radially superposed on one another, comprising: a basic hexagonal bead wire comprising: a radially external layer of N1 windings, a radially internal layer of N1 windings, two axially and radially external lateral rows of N2 windings axially opposite one another, two axially external and radially internal lateral rows of N2 windings axially opposite one another, with N1=N2+1 or N1=N2, and two junctions each one formed by a winding that an axially and radially external lateral row and an axially external and radially internal lateral row have in common, each winding in common forming each junction having no winding of the bead wire axially on the outside of it; and additional rows comprising: at least two pairs of axially external and radially internal additional lateral rows, each of the at least two pairs of axially external and radially internal additional lateral rows having a radially internal winding radially aligned with the radially internal layer of the basic hexagonal bead wire, the bead wire comprising at least one layer Ck where k ∈]1, N[ such that Lk+1>Lk and Lk