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).
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Publication number: 20220407306Abstract: 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: ApplicationFiled: November 9, 2020Publication date: December 22, 2022Inventors: Yuji Furuuchi, Chisato Komori
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Publication number: 20220368124Abstract: 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: ApplicationFiled: November 9, 2020Publication date: November 17, 2022Inventors: Yuji Furuuchi, Chisato Komori
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Patent number: 10964495Abstract: 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: GrantFiled: October 5, 2016Date of Patent: March 30, 2021Assignee: DEXERIALS CORPORATIONInventors: Yuji Furuuchi, Yoshihiro Yoneda, Koichi Mukai, Kazuyuki Sakakibara
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Publication number: 20200321175Abstract: 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: ApplicationFiled: June 24, 2020Publication date: October 8, 2020Applicant: DEXERIALS CORPORATIONInventors: Yuji FURUUCHI, Yoshihiro YONEDA, Koichi MUKAI, Kazuyuki SAKAKIBARA
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Patent number: 10727019Abstract: 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: GrantFiled: October 5, 2016Date of Patent: July 28, 2020Assignee: DEXERIALS CORPORATIONInventors: Yoshihiro Yoneda, Yuji Furuuchi
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Patent number: 10672582Abstract: 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: GrantFiled: September 25, 2015Date of Patent: June 2, 2020Assignee: Dexerials CorporationInventors: Yoshihiro Yoneda, Yuji Furuuchi, Kazumasa Sakakibara
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Patent number: 10593494Abstract: 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: GrantFiled: October 5, 2016Date of Patent: March 17, 2020Assignee: DEXERIALS CORPORATIONInventors: Yuji Furuuchi, Yoshihiro Yoneda, Koichi Mukai, Kazuyuki Sakakibara
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Patent number: 10593495Abstract: 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: GrantFiled: June 4, 2016Date of Patent: March 17, 2020Assignee: DEXERIALS CORPORATIONInventors: Yoshihiro Yoneda, Yuji Furuuchi, Kazuyuki Sakakibara
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Publication number: 20190228936Abstract: 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: ApplicationFiled: June 4, 2016Publication date: July 25, 2019Applicant: DEXERIALS CORPORATIONInventors: Yoshihiro YONEDA, Yuji FURUUCHI, Kazuyuki SAKAKIBARA
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Publication number: 20190066953Abstract: 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: ApplicationFiled: October 5, 2016Publication date: February 28, 2019Applicant: DEXERIALS CORPORATIONInventors: Yuji FURUUCHI, Yoshihiro YONEDA, Koichi MUKAI, Kazuyuki SAKAKIBARA
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Publication number: 20180301302Abstract: 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: ApplicationFiled: October 5, 2016Publication date: October 18, 2018Applicant: DEXERIALS CORPORATIONInventors: Yuji FURUUCHI, Yoshihiro YONEDA, Koichi MUKAI, Kazuyuki SAKAKIBARA
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Publication number: 20180294125Abstract: 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: ApplicationFiled: October 5, 2016Publication date: October 11, 2018Applicant: DEXERIALS CORPORATIONInventors: Yoshihiro YONEDA, Yuji FURUUCHI
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Publication number: 20180294118Abstract: 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: ApplicationFiled: October 5, 2016Publication date: October 11, 2018Applicant: DEXERIALS CORPORATIONInventors: Yuji FURUUCHI, Yoshihiro YONEDA, Koichi MUKAI, Kazuyuki SAKAKIBARA
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Patent number: 10032583Abstract: 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: GrantFiled: February 17, 2016Date of Patent: July 24, 2018Assignee: DEXERIALS CORPORATIONInventors: Yuji Furuuchi, Takashi Fujihata, Koichi Mukai
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Patent number: 9870886Abstract: 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: GrantFiled: February 17, 2016Date of Patent: January 16, 2018Assignee: DEXERIALS CORPORATIONInventors: Yuji Furuuchi, Takashi Fujihata, Koichi Mukai
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Publication number: 20170278663Abstract: 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: ApplicationFiled: September 25, 2015Publication date: September 28, 2017Inventors: Yoshihiro YONEDA, Yuji FURUUCHI, Kazumasa SAKAKIBARA
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Publication number: 20170236666Abstract: 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: ApplicationFiled: February 17, 2016Publication date: August 17, 2017Applicant: DEXERIALS CORPORATIONInventors: Yuji FURUUCHI, Takashi FUJIHATA, Koichi MUKAI
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Publication number: 20170236665Abstract: 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: ApplicationFiled: February 17, 2016Publication date: August 17, 2017Applicant: DEXERIALS CORPORATIONInventors: Yuji FURUUCHI, Takashi FUJIHATA, Koichi MUKAI
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Publication number: 20170236667Abstract: 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: ApplicationFiled: February 17, 2016Publication date: August 17, 2017Applicant: DEXERIALS CORPORATIONInventors: Yuji FURUUCHI, Takashi FUJIHATA, Koichi MUKAI
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Patent number: 9337671Abstract: 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: GrantFiled: December 17, 2012Date of Patent: May 10, 2016Assignee: Dexerials CorporationInventors: Chisato Komori, Yuji Furuuchi, Yoshihiro Yoneda, Koichi Mukai, Koji Ejima, Takashi Fujihata, Kazutaka Furuta, Toshiaki Araki