USPTO Wire & Cable Industry Patents

Compiled from: United States Patent and Trademark Office (USPTO)

Energy Cable Having a Crosslinked Electrically Insulating Layer
United States Patent 10,886,035
Issued January 5, 2021
Inventors: Rodolfo Sica, Milan, Italy; Dario Bartolini, Milan, Italy; and Attilio Citterio, Milan, Italy
Assignees: Prysmian S.p.A., Milan, Italy; and Politecnico Di Milano, Milan, Italy
The present invention relates to an energy cable comprising a cable core comprising an electric
conductor and a crosslinked electrically insulating layer, wherein the cable core further comprises a
microporous material having a bimodal pore volume distribution with a first peak of the
distribution having a maximum at a pore diameter value within the range 5.5-6.5 .ANG. and a
second peak of the distribution having a maximum at a pore diameter value within the range 7.5-
8.5 .ANG., the maximum values of the first and the second peak corresponding to an incremental
pore volume of at least 4×10-3 cm3/g. The present invention also relates to a method for extracting
methane crosslinking by-products from a crosslinked electrically insulating layer of an energy cable.

Superconducting Wire
United States Patent 10,886,040
Issued January 5, 2021
Inventors: Tatsuoki Nagaishi, Osaka, Japan; and Kotaro Ohki, Osaka, Japan
Assignee: Sumitomo Electric Industries, Ltd., Osaka, Japan
A superconducting wire includes a stack which includes: a first substrate having a first primary
surface; a second substrate disposed opposite the first substrate; and a first superconducting
material layer between the first primary surface and the second substrate. A ratio w/h of a width w
of the superconducting wire to a height h of the superconducting wire in a cross-section
perpendicular to the longitudinal direction of the superconducting wire is 0.8 or greater and 10 or
less. The width w is 2 mm or less.

Optical Fiber Cable
United States Patent 10,884,208
Issued January 5, 2021
Inventors: Tomoaki Kaji, Sakura, Japan; Kouji Tomikawa, Sakura, Japan; and Ken Osato, Sakura,
Assignee: Fujikura Ltd., Tokyo, Japan
An optical fiber cable includes: a core, a sheath that accommodates the core therein and a pair of
tension members embedded in the sheath. The core includes: a plurality of optical fiber units that
each includes a plurality of optical fibers, fibrous fillings that extend in a longitudinal direction in
which the plurality of optical fiber units extends and a wrapping tube that encloses the plurality of
optical fiber units and the fibrous fillings. The core is interposed between the pair of tension

Ultrasonic Bonding Method of Conductor of Electric Wire
United States Patent 10,879,661
Issued December 29, 2020
Inventors: Yasunori Nabeta, Shizuoka, Japan; Naoki Ito, Shizuoka, Japan; and Tomoya Sato,
Shizuoka, Japan Assignee: Yazaki Corporation, Tokyo, Japan
An ultrasonic bonding method of a conductor of an electric wire includes ultrasonically bonding
strands forming a conductor of at least one electric wire using an anvil and horns. A first vibration
mode of at least one of the horns is different from a second vibration mode of the other horns.

Electric Wire with Terminal and Method of Manufacturing
United States Patent 10,879,631
Issue December 29, 2020
Inventors: Tomoya Sato, Shizuoka, Japan; and Naoki Ito, Shizuoka, Japan
Assignee: Yazaki Corporation, Tokyo, Japan
An electric wire with a terminal and manufacturing method thereof is provided. In the electric wire
with the terminal, the protective member, the core wire and the terminal fitting are integrally
connected to each other by ultrasonic vibration applied via the protective member from an
ultrasonic horn in a state in which the core wire is sandwiched between the protective member and
the terminal fitting. Therefore, there is no possibility that the ultrasonic horn directly presses the
core wire, and the edge (particularly, the rear edge) of the pressing portion of the ultrasonic horn is
direct in contact with the core wire. Thereby, at the time of ultrasonic bonding, stress concentration
due to the edge (particularly the rear edge) of the pressing portion of the ultrasonic horn with
respect to the core wire can be relaxed, and disconnection of the core wire can be suppressed.

Magnet Wire with Insulation Including an Organometallic Compound
United States Patent 10,872,715
Issued December 22, 2020
Inventor: Scott Ted Jolley, Fort Wayne, IN, USA
Assignee: Essex Furukawa Magnet Wire USA LLC, Atlanta, GA, USA
Magnet wire with corona resistant enamel insulation is described. A magnet wire may include a
conductor and at least one layer of polymeric enamel insulation may be formed around the
conductor. The polymeric enamel insulation may include a filler dispersed in a base polymeric
material, such as polyimide. Additionally, the filler may include an organometallic compound.

Insulated Wire
United States Patent 10,872,712
Issued December 22, 2020
Inventors: Masafumi Kaga, Tokyo, Japan; and Tamotsu Kibe, Tokyo, Japan
Assignee: Hitachi Metals, Ltd., Tokyo, Japan
An insulated wire having an electrical wire structure capable of reducing a diameter while a directcurrent stability property and a flame-retardant property are highly kept is provided. In the insulated wire including: a conductor; a flame-retardant semiconductive layer arranged on an outer
periphery of the conductor; an insulating layer arranged on an outer periphery of the flameretardant semiconductive layer; and a flame-retardant layer arranged on an outer periphery of the insulating layer, an oxygen index of the flame-retardant semiconductive layer defined by JIS K7201-2
is larger than 40, and a volume resistivity of the flame-retardant semiconductive layer defined by JIS C2151 is equal to or smaller than 5.0×1015 (

Cable Having a Twisted Pair Electronic Wire and a Release Layer
United States Patent 10,872,711
Issued December 22, 2020
Inventors: Takaya Kohori, Kanuma, Japan; and Hiroyuki Okawa, Kanuma, Japan
Assignee: Sumitomo Electric Industries, Ltd., Osaka, Japan
An electronic wire and a cable which are excellent in bending resistance even when a diameter is
small. The electronic wire has a conductor and a resin insulating layer coated on the conductor. The
conductor is a double twisted wire in which twisted wires formed by twisting a plurality of wires are
twisted, a diameter of the wire is 0.05 mm or more and 0.2 mm or less, a cross-sectional area of the
conductor is 1.0 mm2 or more and 3.0 mm2 or less, a breaking elongation of the conductor is 10%
or more and 17% or less, a tensile strength of the conductor is 200 MPa or more and 400 MPa or
less, and the insulating layer is disposed to be in close contact with the conductor and has a solid

Power Cable System with Cooling Capability
United States Patent 10,872,713
United States Patent 10,872,713
Issued December 22, 2020
Inventor: Robert Wayne Hobson, Holly Springs, NC, USA
Assignee: NKT HV Cables AB, Lyckeby, Sweden
A power cable system including a power cable and an evaporator pipe assembly extending along
the power cable, wherein the evaporator pipe assembly having an inner liquid pipe including a
pressurized liquid refrigerant, and an outer gas pipe arranged outside of and coaxially with the
inner liquid pipe, wherein the inner liquid pipe is provided with a plurality of openings distributed
along its length, and wherein the openings provide fluid communication between the inner liquid
pipe and the outer gas pipe, allowing part of the pressurized liquid refrigerant to escape from the
inner liquid pipe to the outer gas pipe and evaporate in the outer gas pipe, thereby cooling the
power cable.

High Frequency Signal Transmission Cable
United States Patent 10,867,725
Issued December 15, 2020
Inventors: Detain Huang, Tokyo, Japan; Yoshinori Tsukamoto, Tokyo, Japan; Masashi Moriyama,
Tokyo, Japan; Hideyuki Sagawa, Tokyo, Japan; and Takahiro Sugiyama, Tokyo, Japan
Assignee: Hitachi Metals, Ltd., Tokyo, Japan
A high frequency signal transmission cable includes a conductor, an insulator provided over a
periphery of the conductor, a plating layer provided over a periphery of the insulator and a sheath
provided over a periphery of the plating layer. A crack suppressing layer is provided between the
insulator and the plating layer, in such a manner as to remain in contact with the insulator while
being provided with the plating layer over an outer surface of the crack suppressing layer. The crack
suppressing layer suppresses the occurrence of a cracking in the plating layer by bending while
moving in a longitudinal direction of the cable relative to a bending of the insulator.

Braided Shield and Shielded Electrical Wire
United States Patent 10,861,620
Issued December 8, 2020
Inventor: Daisuke Yagi, Shizuoka, Japan
Assignee: Yazaki Corporation
A braided shield includes at least one electrical wire; and a plurality of shield members that covers
an outer circumferential surface of the electrical wire and is formed by interweaving into a
cylindrical shape. The shield members each include a strip-shaped non-conductor film and a stripshaped conductor member that is shorter than a width of the non-conductor film in a width
direction. In a planar view of the shield member, the conductor member is stacked on the nonconductor film along the longitudinal direction thereof such that the non conductor area and the
conductor film along the longitudinal direction thereof such that the non-conductor area and the
conductor area are formed separately along the width direction of the non-conductor film.

Electric Vehicle Charging Cable
United States Patent 10,861,619
Issued December 8, 2020
Inventors: Jae Bok Lee, Seoul, Korea; Do Hyun Park, Anyang-Si, Korea; Chul Min Kim, Suwon-Si,
Korea; and Hyun Woong Kim, Suwon-Si, Korea
Assignee: LS Cable & System Ltd., Anyang-Si, Korea
The present invention relates to an electric vehicle charging cable capable of effectively cooling
heat, which is generated therein during charging of an electric vehicle, using a cooling fluid,
preventing damage to internal components thereof due to heat, and minimizing a diameter of the

System, Method and Apparatus for Spray-On Application of a Wire Pulling Lubricant
United States Patent 10,847,955
Issue November 24, 2020
Inventors: Mark D. Bennett, Dodd City, TX, USA; William T. Bigbee, Jr., Melissa, TX, USA; and Ramon
V. Hernandez, Howe, TX, USA
Assignee: Encore Wire Corporation, McKinney, TX, USA
A system, method, and apparatus lubricating a wire or cable during manufacturing, wherein the
wire is aligned with an entry to a spraying enclosure and passes through a first seal of the spraying
enclosure. Lubricant is sprayed onto the wire inside of the spraying enclosure while the unapplied,
but sprayed, lubricant is collected at the bottom of the spraying enclosure. The wire passes through
a second seal of the spraying enclosure, is aligned, and exits from the spraying enclosure.

Electric Wire with Cooling Function
United States Patent 10,847,285
Issued November 24, 2020
Inventor: Mi Ru Kim, Seoul, Korea
Assignees: Hyundai Motor Company, Seoul, Korea; and Kia Motors Corporation, Seoul, Korea
The electric wire is a heat pipe type of electric wire and includes a wick part having a channel in an
internal space in which a refrigerant in a gas state with a phase changed by heat flows, and passing
the refrigerant in a liquid state with the phase changed by heat using a capillary phenomenon. A
conductive part surrounds and seals the wick part and is made of a conductive material and an
insulating cover insulates the conductive part from the outside by surrounding the conductive part.
The insulating cover has one or more via holes exposing the conductive part to the outside.

Overhead Cable for the Transmission of Low-Voltage and Medium-Voltage Electric Power and Digital
United States Patent 10,845,557
Issued November 24, 2020
Inventors: Jose Antonio Di Ciommo, Prov. de Buenos Aires, Argentina; and Edgardo Kliewer, Prov. de
Buenos Aires, Argentina
An overhead cable for the transmission of low-voltage and medium-voltage energy and digital
signals, including a central fiber-optic cable, surrounded by a protective covering of the central
fiberoptic cable and around such protective covering of such fiber optics by at least an aluminum
alloy layer for the transmission of low-voltage and medium-voltage electric power or neutral wire
and the covering thereof, where at least one aluminum alloy layer includes a 6101 aluminum alloy
wire that has been heat treated, submitting the same to a temperature within a range of 260 and
300°C and a treatment process for the aluminum alloy drawn wire.

Metal Sheathed Cable with Jacketed, Cabled Conductor Subassembly
United States Patent 10,847,286
Issued November 24, 2020
Inventors: George Anthony Straniero, Cliffwood, NJ, USA; Paul R. Picard, East Greenwich, RI, USA;
Richard A. Ricci, Somerset, MA, USA; and Peter Lafreniere, Mattapoisett, MA, USA
Assignee: AFC Cable Systems, Inc., New Bedford, MA, USA
A Metal-Clad (MC) cable assembly includes a core having a plurality of power conductors that are
cabled with a subassembly, each of the plurality of power conductors and the subassembly
including an electrical conductor, a layer of insulation, and a jacket layer. The MC cable assembly
further includes an assembly jacket layer disposed over the subassembly, and a metal sheath
disposed over the core. In one approach, the subassembly is a cabled set of conductors (e.g.,
twisted pair) operating as class 2 or class 3 circuit conductors in accordance with Article 725 of the
National Electrical Code. In another approach, the MC cable assembly includes a protective layer
disposed around the jacket layer of one or more of the plurality of power conductors and the
subassembly. In yet another approach, a bonding/grounding conductor is cabled with the plurality
of power conductors and the subassembly.

Flame Retardant Optical Fiber Cable
United States Patent 10,845,559
Issued November 24, 2020
Inventors: Kishore Sahoo, Aurangabad, India; Venkatesh Murthy, Aurangabad, India; Dnyaneshwar
Wagh Aurangabad India; Sunil Senapati Aurangabad India; and Ashutosh Pandey Aurangabad
Wagh, Aurangabad, India; Sunil Senapati, Aurangabad, India; and Ashutosh Pandey, Aurangabad,
Assignee: Sterlite Technologies Limited, Aurangabad, India
The present disclosure provides a flame retardant optical fiber cable. The flame retardant optical
fiber cable includes a plurality of bundle binders. Also, the flame retardant optical fiber cable
includes a first layer, second layer, third layer, fourth layer, fifth layer, sixth layer, seventh layer and
eighth layer. The first layer surrounds a plurality of bundle binders. The second layer surrounds the
first layer, third layer surrounds the second layer, fourth layer surrounds the third layer, fifth layer
surrounds the fourth layer, sixth layer surrounds the fifth layer, seventh layer surrounds the sixth
layer and eighth layer surrounds the seventh layer.

Optical Fiber Colored Core Wire, Optical Fiber Cable and Method of Manufacturing Optical Fiber
Colored Core Wire

United States Patent 10,838,159
November 17, 2020
Inventors: Akira Murata, Sakura, Japan; Yoshie Sajima, Sakura, Japan; and Mizuki Isaji, Sakura, Japan;
and Tomoaki Kaji, Sakura, Japan
Assignee: Fujikura Ltd., Tokyo, Japan
An optical fiber colored core wire includes: a bare optical fiber, a primary layer that comprises a UV
curable resin that covers the bare optical fiber, a secondary layer that comprises a UV curable resin
that covers the primary layer and a colored layer disposed outside the secondary layer and that
comprises a colored UV curable resin. The primary layer has a Young’s modulus that is greater than
or equal to 70% of a saturated Young’s modulus of the primary layer.

High Speed Transmission Cable
United States Patent 10,839,981
Issued November 17, 2020
Inventor: Douglas B. Gundel, Cedar Park, TX, USA
Assignee: 3M Innovative Properties Company, St. Paul, MN, USA
The present invention relates to a high-speed transmission cable (100) that includes a first inner
conductor (110) and a dielectric film (120) that is concentrically arranged around at least a portion
of the first conductor (110). The dielectric film (120) has a base layer (122) including a plurality of
first protrusions (124) and second protrusions (126) formed on a first major surface of the base
layer (122), wherein the first protrusions (124) and the second protrusions (126) are different from
one another. The first protrusions (124) of the dielectric film (120) are disposed between the first
inner conductor (110) and the base layer (122), the first protrusions (124) forming an insulating
envelope around the first inner conductor (110).

Cable with Flame Retardant Multi-Layer Covering
United States Patent 10,839,979
Issued November 17, 2020
Inventors: Kevin Cai, Cumberland, RI, USA; and Kushal Bahl, Providence, RI, USA
Assignee: Teknor Apex Company, Pawtucket, RI, USA
A cable comprising a covering having two or more different sheath layers, with the covering
providing superior chemical and weathering resistance, and excellent surface feel. In a preferred
embodiment, the outermost sheath layer of the covering is a thermoplastic elastomer essentially
free of a flame retardant material, yet the covering achieves desirable flame retardant performance
due to the presence of an inner sheath layer comprising a thermoplastic elastomer and a flame
retardant, preferably halogen-free flame retardant. The outermost sheath layer also exhibits
sought-after surface qualities. Methods for producing the coverings and flame retardant cables are

Insulated Electric Wire and Varnish for Forming Insulating Layer
United States Patent 10,832,829
Issued November 10, 2020
Inventors: Shinya Ota, Osaka, Japan; Shuhei Maeda, Osaka, Japan; Hideaki Saito, Osaka, Japan; Jun
Sugawara, Osaka, Japan; Masaaki Yamauchi, Koka, Japan; Yasushi Tamura, Koka, Japan; Kengo
Yoshida, Koka, Japan; Yudai Furuya, Koka, Japan; and Yuji Hatanaka, Koka, Japan
Assignees: Sumitomo Electric Industries, Ltd., Osaka, Japan; and Sumitomo Electric Wintec, Inc.,
Shiga, Japan
An insulated electric wire includes a linear conductor and one or a plurality of insulating layers
formed on an outer peripheral surface of the conductor. At least one of the one or plurality of
insulating layers contains a plurality of pores, outer shells are disposed on peripheries of the pores,
and the outer shells are derived from shells of hollow-forming particles having a core-shell
structure. A varnish for forming an insulating layer contains a resin composition forming a matrix
and hollowforming particles having a core-shell structure and dispersed in the resin composition. In
the varnish, cores of the hollowforming particles contain a thermally decomposable resin as a main
component, and shells of the hollow-forming particles contain a main component having a higher
thermal decomposition temperature than the thermally decomposable resin.

Wire and Cable Jacket Composition of PA6/66 Copolymer Base Resin for Improved Processability
and Properties
United States Patent 10,825,587
Issued November 3, 2020
Inventors: John V. Facinelli, Morristown, NJ, USA; Xiaohan Zhou, Denville, NJ, USA; and Kuil Park,
Midlothian, VA, USA
Assignee: AdvanSix Resins & Chemicals LLC, Parsippany, NJ, USA
Polyamide compositions for use in forming wire or cable jacket compositions. The polyamide
compositions include a component of polyamide 6/66 copolymer formed from substantially
randomly distributed caprolactam monomers and hexamethylenediamine monomers. The
polyamide 6/66 copolymer component may form the entirety of the polyamide composition or
alternatively, the polyamide composition may include an amount of polyamide 6 homopolymer
blended with the polyamide 6/66 copolymer component. The composition also includes one or
more additives, such as at least one UV mitigation component, and the polyamide composition
further has at least one of a measured transmittance of at least 70% and a measured haze of less
than 60%, as determined by ASTM D1003.

Cable Jackets with Capillary Structures
United States Patent 10,802,234
Issued October 13, 2020
Inventors: Mohamed Esseghir, Collegeville, PA, USA; Chester J. Kmiec, Collegeville, PA, USA; Wenyi
Huang, Midland, MI, USA; and Thomas J. Parsons, Midland, MI, USA
Assignee: Dow Global Technologies LLC, Midland, MI, USA
The present disclosure provides a coated conductor. The coated conductor includes a conductor
and a coating on the conductor. The coating includes (i) an annular wall composed of a polymeric
material, the annular wall surrounding at least a portion of the conductor; (ii) a plurality of channels
extending along a length of an outer surface of the annular wall; and (iii) a slip material located in
the channels, the slip material forming a capillary structure in the channels, and the capillary
structures protruding radially outward from the annular wall.

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