Patents by Inventor Yuji Furuuchi

Yuji Furuuchi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220407306
    Abstract: Provided is a protection circuit capable of reliably preventing an overcurrent or a sneak current after cutoff to improve safety, implementing cost reduction with a device configuration simpler than conventional device configurations, and further reducing a failure rate of a device. In a protection circuit, after one of two fuse elements provided in each of a plurality of protection elements is blown due to an overcurrent flowing along a current-carrying path, a heater provided in at least one of the plurality of protection elements generates heat due to a sneak current flowing via the plurality of protection elements on the current-carrying path which is remained and blows the other of the two fuse elements provided in the at least one of the plurality of protection elements.
    Type: Application
    Filed: November 9, 2020
    Publication date: December 22, 2022
    Inventors: Yuji Furuuchi, Chisato Komori
  • Publication number: 20220368124
    Abstract: Provided is a protection circuit capable of reliably preventing an overcurrent or a sneak current after cutoff to improve safety, implementing cost reduction with a device configuration simpler than conventional device configurations, and further reducing a failure rate of a device. In a protection circuit, after one of two fuse elements provided in each of a plurality of protection elements is blown due to an overcurrent flowing along a current-carrying path, a heater provided in at least one of the plurality of protection elements generates heat due to a sneak current flowing via the plurality of protection elements on the current-carrying path which is remained and the current-carrying path which is remained is cut off due to destruction of the heater.
    Type: Application
    Filed: November 9, 2020
    Publication date: November 17, 2022
    Inventors: Yuji Furuuchi, Chisato Komori
  • Patent number: 10964495
    Abstract: A switch device capable of safely opening an electrical circuit in response to an abnormality such as wetting with water or liquid leaking from a battery. The device includes a first conductor connected to an external circuit and having a relatively high ionization tendency, and a second conductor arranged close to the first conductor and having a relatively low ionization tendency which is lower than that of the first conductor, a reaction part which electrically corrodes the first conductor is formed by a liquid between the first and second conductors.
    Type: Grant
    Filed: October 5, 2016
    Date of Patent: March 30, 2021
    Assignee: DEXERIALS CORPORATION
    Inventors: Yuji Furuuchi, Yoshihiro Yoneda, Koichi Mukai, Kazuyuki Sakakibara
  • Publication number: 20200321175
    Abstract: A switch device capable of safely opening or short-circuiting an electrical circuit in response to an abnormality such as wetting with water or liquid leaking from a battery is provided. The device includes a conductor connected to an external circuit, and a reaction part including a liquid-soluble material which opens the conductor and the external circuit and which dissolves on contacting a liquid entering the device interior to electrically connect the conductor and the external circuit.
    Type: Application
    Filed: June 24, 2020
    Publication date: October 8, 2020
    Applicant: DEXERIALS CORPORATION
    Inventors: Yuji FURUUCHI, Yoshihiro YONEDA, Koichi MUKAI, Kazuyuki SAKAKIBARA
  • Patent number: 10727019
    Abstract: A fuse device includes a fuse element and a cooling member, wherein the fuse element includes a low thermal conductivity portion having a relatively low thermal conductivity in which an interrupting portion that is blown out by heat is separated from the cooling member, and a high thermal conductivity portion having a relatively high thermal conductivity, provided in a portion other than the interrupting portion, and in contact with or close to the cooling member.
    Type: Grant
    Filed: October 5, 2016
    Date of Patent: July 28, 2020
    Assignee: DEXERIALS CORPORATION
    Inventors: Yoshihiro Yoneda, Yuji Furuuchi
  • Patent number: 10672582
    Abstract: It is an object of the invention to provide an electric wire having an excellent electrical conductivity in use of the high melting point metal and being able to surely cut off by fusing the conductive material itself at a temperature lower than the melting point of the high melting point metal, even where heat is generated from flowing overcurrent in the electrical circuit. The electric wire of the invention has a feature including a conductive material formed of a first conductive member made of a low melting point metal, and a second conductive member made of a high melting point metal, which are provided adjacent to each other, wherein the conductive material is fused by erosion of the high melting point metal according to melting of the low melting point metal.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: June 2, 2020
    Assignee: Dexerials Corporation
    Inventors: Yoshihiro Yoneda, Yuji Furuuchi, Kazumasa Sakakibara
  • Patent number: 10593494
    Abstract: A switch device capable of safely opening or short-circuiting an electrical circuit in response to an abnormality such as wetting with water or liquid leaking from a battery is provided. The device includes first and second conductors connected to an external circuit, and a reaction part including an insulating material which changes state on contact with a liquid, the first and second conductors being electrically connected or disconnected by the insulating material changing state on contact with the liquid.
    Type: Grant
    Filed: October 5, 2016
    Date of Patent: March 17, 2020
    Assignee: DEXERIALS CORPORATION
    Inventors: Yuji Furuuchi, Yoshihiro Yoneda, Koichi Mukai, Kazuyuki Sakakibara
  • Patent number: 10593495
    Abstract: A fuse element comprises a low melting point metal layer, a first high melting point metal layer having a higher melting point than a melting point of the low melting point metal layer, and a restricting portion including a high melting point material having a higher melting point than a melting point of the low melting point metal layer and configured to restrict flow of the low melting point metal or deformation of a layered body constituted by the first high melting point metal layer and the low melting point metal layer.
    Type: Grant
    Filed: June 4, 2016
    Date of Patent: March 17, 2020
    Assignee: DEXERIALS CORPORATION
    Inventors: Yoshihiro Yoneda, Yuji Furuuchi, Kazuyuki Sakakibara
  • Publication number: 20190228936
    Abstract: A fuse element comprises a low melting point metal layer, a first high melting point metal layer having a higher melting point than a melting point of the low melting point metal layer, and a restricting portion including a high melting point material having a higher melting point than a melting point of the low melting point metal layer and configured to restrict flow of the low melting point metal or deformation of a layered body constituted by the first high melting point metal layer and the low melting point metal layer.
    Type: Application
    Filed: June 4, 2016
    Publication date: July 25, 2019
    Applicant: DEXERIALS CORPORATION
    Inventors: Yoshihiro YONEDA, Yuji FURUUCHI, Kazuyuki SAKAKIBARA
  • Publication number: 20190066953
    Abstract: A switch device capable of safely opening or short-circuiting an electrical circuit in response to an abnormality such as wetting with water or liquid leaking from a battery is provided. The device includes a conductor connected to an external circuit, and a reaction part including a liquid-soluble material which opens the conductor and the external circuit and which dissolves on contacting a liquid entering the device interior to electrically connect the conductor and the external circuit.
    Type: Application
    Filed: October 5, 2016
    Publication date: February 28, 2019
    Applicant: DEXERIALS CORPORATION
    Inventors: Yuji FURUUCHI, Yoshihiro YONEDA, Koichi MUKAI, Kazuyuki SAKAKIBARA
  • Publication number: 20180301302
    Abstract: A switch device capable of safely opening an electrical circuit in response to an abnormality such as wetting with water or liquid leaking from a battery. The device includes a first conductor connected to an external circuit and having a relatively high ionization tendency, and a second conductor arranged close to the first conductor and having a relatively low ionization tendency which is lower than that of the first conductor, a reaction part which electrically corrodes the first conductor is formed by a liquid between the first and second conductors.
    Type: Application
    Filed: October 5, 2016
    Publication date: October 18, 2018
    Applicant: DEXERIALS CORPORATION
    Inventors: Yuji FURUUCHI, Yoshihiro YONEDA, Koichi MUKAI, Kazuyuki SAKAKIBARA
  • Publication number: 20180294125
    Abstract: A fuse device includes a fuse element and a cooling member, wherein the fuse element includes a low thermal conductivity portion having a relatively low thermal conductivity in which an interrupting portion that is blown out by heat is separated from the cooling member, and a high thermal conductivity portion having a relatively high thermal conductivity, provided in a portion other than the interrupting portion, and in contact with or close to the cooling member.
    Type: Application
    Filed: October 5, 2016
    Publication date: October 11, 2018
    Applicant: DEXERIALS CORPORATION
    Inventors: Yoshihiro YONEDA, Yuji FURUUCHI
  • Publication number: 20180294118
    Abstract: A switch device capable of safely opening or short-circuiting an electrical circuit in response to an abnormality such as wetting with water or liquid leaking from a battery is provided. The device includes first and second conductors connected to an external circuit, and a reaction part including an insulating material which changes state on contact with a liquid, the first and second conductors being electrically connected or disconnected by the insulating material changing state on contact with the liquid.
    Type: Application
    Filed: October 5, 2016
    Publication date: October 11, 2018
    Applicant: DEXERIALS CORPORATION
    Inventors: Yuji FURUUCHI, Yoshihiro YONEDA, Koichi MUKAI, Kazuyuki SAKAKIBARA
  • Patent number: 10032583
    Abstract: In a protective circuit substrate having a circuit substrate and a protective element, the protective element including: an insulating substrate; a heat-generating element; first and second electrodes laminated on the insulating substrate; a first and second connecting terminals provided on one side edge of a mounting surface to be mounted to the circuit substrate, the first connecting terminals being continuous with the first and second electrodes; a heat-generating element extracting electrode provided in a current path between the first and second electrodes and electrically connected to the heat-generating element; and a meltable conductor provided between the first and second electrodes, wherein the circuit substrate includes a region for mounting the protective element in which no electrode pattern other than a connecting electrode to the protective element is provided.
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: July 24, 2018
    Assignee: DEXERIALS CORPORATION
    Inventors: Yuji Furuuchi, Takashi Fujihata, Koichi Mukai
  • Patent number: 9870886
    Abstract: A protective element includes: a rectangurarly shaped insulating substrate; a heat-generating element formed on the insulating substrate; first and second electrodes laminated on a surface of the insulating substrate; first and second connecting terminals provided on a back surface of the insulating substrate and being continuous with the first and second electrodes; a heat-generating element extracting electrode provided on a current path between the first and the second electrodes and electrically connected to the heat-generating element; and a meltable conductor laminated on a region extending from the heat-generating element extracting electrode to the first and second electrodes and to be melted by heat to interrupt the current path between the first electrode and the second electrodes; wherein at least one of the corner portions of the insulating substrate is chamfered.
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: January 16, 2018
    Assignee: DEXERIALS CORPORATION
    Inventors: Yuji Furuuchi, Takashi Fujihata, Koichi Mukai
  • Publication number: 20170278663
    Abstract: It is an object of the invention to provide an electric wire having an excellent electrical conductivity in use of the high melting point metal and being able to surely cut off by fusing the conductive material itself at a temperature lower than the melting point of the high melting point metal, even where heat is generated from flowing overcurrent in the electrical circuit. The electric wire of the invention has a feature including a conductive material formed of a first conductive member made of a low melting point metal, and a second conductive member made of a high melting point metal, which are provided adjacent to each other, wherein the conductive material is fused by erosion of the high melting point metal according to melting of the low melting point metal.
    Type: Application
    Filed: September 25, 2015
    Publication date: September 28, 2017
    Inventors: Yoshihiro YONEDA, Yuji FURUUCHI, Kazumasa SAKAKIBARA
  • Publication number: 20170236666
    Abstract: A protective element includes: a rectangurarly shaped insulating substrate; a heat-generating element formed on the insulating substrate; first and second electrodes laminated on a surface of the insulating substrate; first and second connecting terminals provided on a back surface of the insulating substrate and being continuous with the first and second electrodes; a heat-generating element extracting electrode provided on a current path between the first and the second electrodes and electrically connected to the heat-generating element; and a meltable conductor laminated on a region extending from the heat-generating element extracting electrode to the first and second electrodes and to be melted by heat to interrupt the current path between the first electrode and the second electrodes; wherein at least one of the corner portions of the insulating substrate is chamfered.
    Type: Application
    Filed: February 17, 2016
    Publication date: August 17, 2017
    Applicant: DEXERIALS CORPORATION
    Inventors: Yuji FURUUCHI, Takashi FUJIHATA, Koichi MUKAI
  • Publication number: 20170236665
    Abstract: In a protective circuit substrate having a circuit substrate and a protective element, the protective element including: an insulating substrate; a heat-generating element; first and second electrodes laminated on the insulating substrate; a first and second connecting terminals provided on one side edge of a mounting surface to be mounted to the circuit substrate, the first connecting terminals being continuous with the first and second electrodes; a heat-generating element extracting electrode provided in a current path between the first and second electrodes and electrically connected to the heat-generating element; and a meltable conductor provided between the first and second electrodes, wherein the circuit substrate includes a region for mounting the protective element in which no electrode pattern other than a connecting electrode to the protective element is provided.
    Type: Application
    Filed: February 17, 2016
    Publication date: August 17, 2017
    Applicant: DEXERIALS CORPORATION
    Inventors: Yuji FURUUCHI, Takashi FUJIHATA, Koichi MUKAI
  • Publication number: 20170236667
    Abstract: A protective element includes: an insulating substrate; a heat-generating element formed on the insulating substrate; first and second electrodes formed on side edges of a front surface of the insulating substrate; first and second connecting terminals provided on the back surface of the insulating substrate and being continuous with the electrodes; through-holes penetrating the front and back surfaces of the insulating substrate to connect the electrodes to the connecting terminals respectively; a heat-generating element extracting electrode electrically connected to the heat-generating element; and a meltable conductor laminated on a region extending from the heat-generating element extracting electrode to the electrodes and to be melted by heat to interrupt the current path between the electrodes; wherein the through-holes are formed at a central portion of the side edges of the insulating substrate on which the electrodes are formed.
    Type: Application
    Filed: February 17, 2016
    Publication date: August 17, 2017
    Applicant: DEXERIALS CORPORATION
    Inventors: Yuji FURUUCHI, Takashi FUJIHATA, Koichi MUKAI
  • Patent number: 9337671
    Abstract: A protective element including a substrate having a first insulating member and a concave portion formed thereon, a heating body layered on the concave portion of the substrate, a second insulating member layered on the substrate so as to cover at least covering the heating body, first and second electrodes layered on a surface of the substrate on which the second insulating member is layered, a heating body electrode layered on the second insulating member so as to be superimposed with the heating body, and electrically connected to a current path between the first and the second electrodes as well as onto and the heating body, and a low-melting point metal layered from the heating body electrode toward the first and the second electrodes configured to cause a blowout of the current path between the first and the second electrodes by heating.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: May 10, 2016
    Assignee: Dexerials Corporation
    Inventors: Chisato Komori, Yuji Furuuchi, Yoshihiro Yoneda, Koichi Mukai, Koji Ejima, Takashi Fujihata, Kazutaka Furuta, Toshiaki Araki