Patents for May 2026
USPTO Wire & Cable Industry Patents as compiled by the editors of WCTI for May 2026.
Central Tension Line for Overhead Power Transmission Cable Having Damage Detection Function and Overhead Power Transmission Cable Comprising Same
US Patent 12592552
Published March 31, 2026
Inventors: Seung Hyun Shin, Suwon-si, South Korea; Min Seok Kwon, Songpa-gu, South Korea; Seung Hwan Eun, Dongjak-gu, South Korea; and Jee Yong Park, Anyang-si, South Korea
Assignee: LS Cable & System Ltd., Anyang-si, South Korea
The present disclosure relates to a central tension line for an overhead power transmission cable having a damage detection function and an overhead power transmission cable comprising same, wherein it is possible to detect whether the central tension line is damaged before installing the overhead transmission cable on a pylon or before clamping for the installation of the overhead transmission cable, and after installing the overhead transmission cable on the pylon; and the central tension line has excellent tensile strength, thus having excellent sag properties preventing the wired overhead transmission cable from sagging, and has flexibility, thus improving wiring workability, while the central tension line suppresses corrosion and damage to a conductor wire disposed around the central tension line, and thus eliminates or minimizes an increase in resistance of the overhead transmission cable and the resultant reduction in transmission capacity, and enables the reduction of weight and manufacturing costs.
Cable for Electric Power Transmission
US Patent 12590557
Published March 31, 2026
Inventors: Weijun Yin, Niskayuna, NY, USA; Karim Younsi, Ballston Lake, NY, USA; Ibrahim Ndiaye, Ballston Spa, NY, USA; Mark Dame, Niskayuna, NY, USA; Han Xiong, Niskayuna, NY, USA; and Rinaldo Luigi Miorini, Niskayuna, NY, USA
Assignee: General Electric Company, Evendale, OH, USA
A cable that includes a conductor defining a hollow interior, a casing surrounding the conductor, an electrical insulator positioned between the conductor and the casing and a fluid positioned within the hollow interior of the conductor.
Single-Use Cable Payoff Systems with Reduced Pull Resistance
US Patent 12589969
Published March 31, 2026
Inventors: Mark D. Dixon, Carrollton, GA, USA; John Armstrong, Villa Rica, GA, USA; Steven Powers, Carrollton, GA, USA; Stephen L. Spruell, Carrollton, GA, USA; Randy D. Kummer, Villa Rica, GA, USA; and Torri L. Logan, Newnan, GA, USA
Assignee: Southwire Company, LLC, Carrollton, GA, USA
Disclosed herein are disposable cable payoff systems that maintain the performance standards required for operation at commercial sites, such as durability during transport from the manufacturer and cable payoff, and low resistance cable payoff. Preloaded cable reels comprising a disposable cable payoff system are also disclosed herein. Methods for providing the preloaded cables reels are also disclosed herein.
UV Laser-Markable Colored Wire Insulation Material
US Patent 12583994
Published March 24, 2026
Inventors: Samuel Abiodun, Cypress, TX, USA, Rodrigo Costa, Houston, TX, USA; and Andrew Bastian, Cypress, TX, USA
Assignee: Altamira Material Solutions, Houston, TX, USA
Laser-markable dark-colored insulation materials that produce light-color marking with remarkably high contrast and durability, when marked with UV laser, are disclosed. Also disclosed are materials, synthesis and application of the laser-markable insulation materials and methods of making the insulation materials.
Charging Cable with Charging Plug
US Patent 12583342
Published March 24, 2026
Inventor: Sebastian Vahle, Landshut, Germany
Assignee: AUDI AG, Ingolstadt, Germany
A charging cable is provided having a charging plug for electrically driven motor vehicles. A method for its operation is also provided.
Steel Wire
US Patent 12584204
Published March 24, 2026
Inventors: Kei Hirai, Osaka, Japan; Tetsya Nakajima, Osaka, Japan; Akifumi Matsuoka, Osaka, Japan; and Takumi Akada, Osaka, Japan
Assignee: Sumitomo Electric Industries, Ltd., Osaka, Japan
A steel wire is composed of a steel containing not less than 1.0 mass % and not more than 1.1 mass % C, not less than 0.15 mass % and not more than 0.25 mass % Si, not less than 0.25 mass % and not more than 0.35 mass % Mn, and not less than 0.15 mass % and not more than 0.25 mass % Cr, with the balance being Fe and unavoidable impurities. The steel wire has a wire diameter of not less than 0.15 mm and not more than 0.42 mm. The steel has a pearlite structure. The steel has a dislocation density of not less than 2.4×1016 m−2 and not more than 5.0×1016 m−2. The steel has a full width at half maximum in a circumferential direction of not less than 42° at a peak of a maximum intensity of a Debye ring for Fe (211) plane.
Optical Cable
US Patent 12585074
Published March 24, 2026
Inventor: Man Su Lee, Chilgok-gun, South Korea
Assignee: LS Cable & System Ltd., Anyang-si, South Korea
The present disclosure relates to an optical cable in which an optical fiber bundle with clustered or bundled optical fibers is accommodated in a tubular member and the optical fibers are formed in an excess group length (EGL) by modeling considering bending properties of the optical cable or a lossless bending radius of the optical fibers of the optical fiber bundle, thereby minimizing stress, damage or optical loss of the optical fibers in the optical fiber bundle.
Multicore Cable
US Patent 12586694
Published March 24, 2026
Inventors: Wei Tu, Tochigi, Japan; Hirotaka Kato, Tochigi, Japan; and Takumi Ooshima, Tochigi, Japan
Assignee: Sumitomo Electric Industries, Ltd., Osaka, Japan
A multicore cable includes a core in which multiple electrical wires are twisted together, a release layer covering the core and a jacket covering the release layer. A lay length for the multiple electrical wires is greater than or equal to 21 times and less than or equal to 28 times a long dimension of the core, and the release layer is fixed to the jacket.
Electrical Cable That Limits Partial Discharges
US Patent 12580099
Published March 17, 2026
Inventors: Thomas Hahner, Verrieres le Buisson, France; and
Patrick Rybski, Yerres, France
Assignee: Nexans, Courbevoie, France
An aerospace cable that limits the occurrence of partial discharges includes an elongate electrically conductive element surrounded by a semiconductor layer and an insulation system around the semiconductor layer. This insulation system has an electrically insulating layer surrounding the semiconductor layer. Each layer of the insulation system has a radial thickness (ei . . . ), and in that an equivalent insulation thickness (teq) of this insulation system is greater than or equal to the result of a third-degree polynomial function equation of a minimum pressure and of a maximum temperature at which the cable is intended to be used.
Flux-Cored Wire
US Patent 12576465
Published March 17, 2026
Inventors: Shinya Isono, Fujisawa, Japan; and Hideaki Takauchi, Fujisawa, Japan
Assignee: Kobe Steel, Ltd., Kobe, Japan
A flux-cored wire for gas-shielded arc welding in which a steel sheath is filled with flux and the flux-cored wire contains Fe, C, Mn, Cr, Ni, Mo, Nb, V, P and S within controlled amounts, and further contains, with respect to the total mass of the wire, TiO.sub.2: 3.0 mass % or more and 9.0 mass % or less, a SiO2 conversion value of metal Si and a Si compound: 0.5 mass % or more and 1.5 mass % or less, Co: 0.10 mass % or more and 1.50 mass % or less, N: 0.015 mass % or more and 0.060 mass % or less, Li: 0.11 mass % or less, Mg: 0.85 mass % or less, and a total amount of K and Na: 0.3 mass % or less.
Machine Network and Method for Arranging Cables According to a Specified Cable Sequence
US Patent 12577062
Published March 17, 2026
Inventor: Stefan Viviroli, Horw, Switzerland
Assignee: Komax Holding AG, Dierikon, Switzerland
A machine network for arranging cables according to a specified cable sequence includes first and second cable output devices and a cable transport device. The sequence includes cable types from at least one first and one second cable type group. The first cable type group includes only the first cable type and the second cable type group includes only the second cable type. The first cable output device is configured for outputting a first cable type group cable. The second cable output device is configured for outputting a second cable type group cable. The cable transport device is configured for selectively accepting the first cable output device cable and the second cable output device cable and for transporting the accepted cables. The selective acceptance occurs at least partially according to the specified cable sequence. A method for arranging cables according to the specified cable sequence utilizes the machine network.
Oxide Superconducting Wire
US Patent 12573527
Published March 10, 2026
Inventor: Tomo Yoshida, Sakura, Japan
Assignee: Fujikura Ltd., Tokyo, Japan
An oxide superconducting wire includes: a substrate having a main surface; a superconducting layer disposed above the substrate and formed of a rare-earth high-temperature superconductor; and a protective layer disposed on the superconducting layer and in contact with the superconducting layer. An a-axis direction is oriented perpendicular to the main surface of the substrate. The superconducting layer includes a-axis oriented grains oriented along the a-axis direction. An a-axis oriented grain ratio is defined as a proportion of the a-axis oriented grains to an entirety of crystal grains forming the superconducting layer. The a-axis oriented grain ratio is greater than or equal to 4.1% and less than or equal to 11.9%.
Power Cable with Metallic Sheath Joint
US Patent 12573526
Published March 10, 2026
Inventors: Andreas Mattsson, Karlskrona, Sweden; Johan Jäderberg, Lyckeby, Sweden; Joakim Wikström, Karlskrona, Sweden; Johnny Ericsson, Rödeby, Sweden; and Pontus Danielsson, Lyckeby, Sweden
Assignee: NKT HV Cables AB, Lyckeby, Sweden
A power cable includes from inside to outside: a conductor; an insulation system having an inner semiconducting layer, an insulation layer, and an outer semiconducting layer; a metallic water blocking layer including a first axial section, a second axial section and an intermediate axial section arranged between the first axial section and the second axial section and made of a lead-free metal material which is different from a first metal material of at least one of the first axial section and the second axial section. The intermediate axial section is joined thermally along its entire inner or outer perimeter with each of the first axial section and the second axial section to obtain watertight connections. The lead-free metal material has a lower yield strength than the first metal material.
Insulated Wire
US Patent 12573523
Published March 10, 2026
Inventors: Takami Ushiwata, Tokyo, Japan; Ikumi Ando, Tokyo, Japan; and Hajime Nishi, Tokyo, Japan
Assignee: Proterial, Ltd., Tokyo, Japan
The insulated wire has a conductor having a long shape, and an insulation film including multiple pores and covering the conductor, wherein an opening area ratio SR measured by a method below is 1% or less. The method of measuring the opening area ratio SR includes peeling the insulation film from the conductor; obtaining a SEM image showing an interface on a conductor side in the insulation film peeled; calculating an area S1 of an observation region that is at least a part of the SEM image; and an area S2 of portions where the multiple pores are open in the observation region; and calculating the opening area ratio SR by the following Formula: SR=(S2/S1)×100.
Coolable Single Line and Charging Cable
US Patent 12567518
Published March 3, 2026
Inventors: Tomasz Oslislok, Bad Zurzach, Switzerland; and Albert Martinez Vall, Baden, Switzerland
Assignee: BRUGG eConnect AG, Brugg, Switzerland
A single line for a charging cable includes an open support structure (011, 012) having a longitudinal extent, at least one channel conductor (2) made of electrically conductive material, and an insulation (3). The at least one channel conductor (2) wraps around and contacts the open support structure (011, 012) along its longitudinal extension. The insulation (3) wraps the open support structure (011, 012) and the at least one channel conductor (2). At least one channel (4) for a cooling fluid (5) is provided and is formed by the support structure (011, 012) and the channel conductor (2). The insulation (3) is impermeable to the cooling fluid (5) and is electrically insulating.
Loose Tube-Type Optical Cable Production Device and Production Method
US Patent 12564992
Published March 3, 2026
Inventors: Kengo Tanabe, Kawasaki, Japan; Junya Hasunuma, Kawasaki, Japan; Yuki Ota, Kawasaki, Japan; and Hitoshi Saito, Kawasaki, Japan
Assignee: SWCC Showa Cable Systems Co., Ltd., Kawasaki, Japan
There is disclosed a production device for a loose tube-type optical cable in which an optical fiber bundle is housed in a tube. The production device includes: a resin extruder configured to extrude and coat a resin onto the optical fiber bundle; and a water tank configured to store cooling water for cooling the resin to form the tube, wherein: the resin extruder includes: an extruder die having an extrusion port for the resin; a pipe penetrating the extruder die; and an air pump mechanism configured to pump air to the pipe; and the water tank includes: a sizing die having an inlet, a passage port, and a suction port for the cooling water; and a cooling water suction mechanism configured to suck the cooling water from the sizing die.
Low-Smoke, Flame-Retardant Data Communication Cables
US Patent 12567517
Published March 3, 2026
Inventors: Eric W. Bates, Lafayette, IN, USA; Stephen A. Thwaites, Walton, KY, USA; and James D. Malkemus, Union, KY, USA
Assignee: Prysmian S.p.A., Milan, Italy
A data communication cable includes a jacket layer surrounding a cable core, which includes at least one pair of twisted electric conductors electrically insulated with a flame-retardant polypropylene (FRPP)-based material. The FRPP-based material includes a char enhancer, a halogenated flame retardant; and a flame retardant additive. The FRPP-based material is free from flame-retardant hydrated mineral filler.
Multi-Cable Cord Reel System
US Patent 12565399
Published March 3, 2026
Inventors: John Alford, Mundelein, IL, USA; and Paul C. Burke, Lake Forest, IL, USA
Assignee: Konnectronix, Inc., Waukegan, IL, USA
A system for simultaneous connection and transmission of data and/or power signals through a construction involving both fiber optic and conventional conduction cords. More specifically, a unitary construct comprising a plurality of bound cords, preferably, having at least one fiber optic cord and at least one conventional cord contained within a larger unitary construction, with one end of the construction being retracted into or guided out of a spool for quick deployment to enable a plurality of connectors to make a quick and substantially simultaneous deployment across a variety of cable media.
Low Sag Tree Wire
US Patent 12567514
Published March 3, 2026
Inventors: Charles L. Holcombe, Newnan, GA, USA; Drew Wallance Pearson, Villa Rica, GA, USA; Joachim Axel Schlumberger, Atlanta, GA, USA; and Barrett M. Kimball, Bremen, GA, USA
Assignee: Southwire Company, LLC, Carrollton, GA, USA
Disclosed herein is a tree wire and a method of preparing the same. The tree wire disclosed herein has an improved ampacity compared to a conventional ACSR tree wire, as well as reduced sag compared to a conventional ACSR bare conductor and/or ACSR tree wire.