Patents by Inventor Toshikazu Yamaoka
Toshikazu Yamaoka 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: 20230245804Abstract: A thermal protection device, comprising: a first PTC device, arranged in a PTC circuit, and having a first input side, coupled to an input path of the PTC circuit, and having a first output side, coupled to an output path of the PTC circuit; a second PTC device, arranged in the PTC circuit, and having a second input side, coupled to the input path of the PTC circuit, and having a second output side, coupled to the output path of the PTC circuit; and a thermal link having a third input side, coupled to the first output side of the first PTC device and the second output side of the second PTC device, via the output path of the PTC circuit.Type: ApplicationFiled: January 25, 2023Publication date: August 3, 2023Applicant: Littelfuse, Inc.Inventors: TOSHIKAZU YAMAOKA, YOHEI MIZUKAMI, JIANHUA CHEN, WERNER JOHLER
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Publication number: 20230097068Abstract: A protection device includes a movable arm, a fixed terminal, and a bimetallic member, and a casing that accommodates them, the bimetallic member is located either above or below the movable arm, one end of the bimetallic member applies force to one end of the movable arm, thereby holding one end of the movable arm and the fixed terminal in contact.Type: ApplicationFiled: September 22, 2022Publication date: March 30, 2023Applicant: Littelfuse, Japan G.K.Inventors: Toshikazu YAMAOKA, Hajime TAKAHASHI, Katsuaki SUZUKI
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Patent number: 9935307Abstract: A positive electrode lead of the present invention comprises: a strip-shaped first lead half body electrically connected to a sealing body of a nickel-hydrogen secondary battery; a strip-shaped second lead half body electrically connected to a positive electrode of an electrode group of the nickel-hydrogen secondary battery; a PTC thermistor joined between the first lead half body and the second lead half body; and a protective member covering a portion of the positive electrode lead where the PTC thermistor is joined. The second lead half body includes a portion to be bent on the outer side of the portion covered with the protective member. A recessed groove is formed in the portion covered with the protective member and has a shape elongated in a direction intersecting with a bend line of the portion to be bent.Type: GrantFiled: November 26, 2013Date of Patent: April 3, 2018Assignees: FDK CORPORATION, Littelfuse Japan G.K.Inventors: Erika Ido, Koji Izumi, Satoshi Wada, Hideaki Kitazume, Yohei Mizukami, Masatoshi Sakamoto, Toshikazu Yamaoka
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Publication number: 20170278600Abstract: A PTC device as well as an electrical device such as a battery pack or a dry-cell type secondary cell containing a PTC device and a secondary cell is made more compact. The PTC device includes (1) a PTC component including a laminar polymer PTC element having an electrically conductive filler and a polymer material, and a metal electrode disposed on a surface of each side of the polymer PTC element; and (2) a lead positioned at least in part on the metal electrode of the PTC component, and connected to the metal electrode by an electrically conductive material An exposed part of the electrically conductive material is covered by a protective member including a polypropylene resin, a nylon resin or an epoxy resin.Type: ApplicationFiled: June 12, 2017Publication date: September 28, 2017Applicant: Littelfuse Japan G.K.Inventors: Arata Tanaka, Toshikazu Yamaoka, Haruhisa Miyagi
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Publication number: 20170279107Abstract: The present invention provides an electrode for an electrical device, the electrode comprising: a PTC element; a first terminal disposed on one main surface of the PTC element and extending in one direction; and a second terminal disposed on the other main surface of the PTC element and extending in a different direction from the first terminal.Type: ApplicationFiled: November 13, 2015Publication date: September 28, 2017Applicant: LITTELFUSE JAPAN G.K.Inventors: Toshikazu YAMAOKA, Shigeyuki ASO
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Publication number: 20160189897Abstract: An object of the present invention is to provide a protection device which is able to provide suitable protection against excessive current and the abnormal high temperature, has large holding current and does not have mechanical contact. The present invention provides a protection device including (i) at least one PTC component and (ii) a thermal fuse component, wherein each PTC component and the thermal fuse component are connected to each other electrically in parallel; the thermal fuse component is under the influence of heat of at least one PTC component; and in a normal state, a current flows substantially through each PTC component and the thermal fuse component.Type: ApplicationFiled: July 17, 2014Publication date: June 30, 2016Applicant: Tyco Electronics Japan G.K.Inventors: Takashi Hasunuma, Arata Tanaka, Toshikazu Yamaoka
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Publication number: 20150303445Abstract: A positive electrode lead of the present invention comprises: a strip-shaped first lead half body electrically connected to a sealing body of a nickel-hydrogen secondary battery; a strip-shaped second lead half body electrically connected to a positive electrode of an electrode group of the nickel-hydrogen secondary battery; a PTC thermistor joined between the first lead half body and the second lead half body; and a protective member covering a portion of the positive electrode lead where the PTC thermistor is joined. The second lead half body includes a portion to be bent on the outer side of the portion covered with the protective member. A recessed groove is formed in the portion covered with the protective member and has a shape elongated in a direction intersecting with a bend line of the portion to be bent.Type: ApplicationFiled: November 26, 2013Publication date: October 22, 2015Applicants: FDK CORPORATION, TYCO ELECTRONICS JAPAN G.K.Inventors: Erika Ido, Koji Izumi, Satoshi Wada, Hideaki Kitazume, Yohei Mizukami, Masatoshi Sakamoto, Toshikazu Yamaoka
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Patent number: 9164075Abstract: [Problem] To provide a novel isotope-labeled compound that can be used as a trapping agent and that is useful for picking out drug-candidate compounds that produce reactive metabolites. [Solution] Provided is a glutathione alkylester isotopologue represented by general formula (1). In formula (1), R1 represents a linear or branched alkoxy group in which at least one of carbon, oxygen, and hydrogen atoms contained therein is isotope-labeled and which has 1 to 8 carbon atoms or a cycloalkoxy group in which at least one of carbon, oxygen, and hydrogen atoms contained therein is isotope-labeled and which has 3 to 8 carbon atoms.Type: GrantFiled: May 21, 2012Date of Patent: October 20, 2015Assignee: Kyorin Pharmaceutical Co., Ltd.Inventor: Toshikazu Yamaoka
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Publication number: 20140193847Abstract: [Problem] To provide a novel isotope-labeled compound that can be used as a trapping agent and that is useful for picking out drug-candidate compounds that produce reactive metabolites. [Solution] Provided is a glutathione alkylester isotopologue represented by general formula (1). In formula (1), R1 represents a linear or branched alkoxy group in which at least one of carbon, oxygen, and hydrogen atoms contained therein is isotope-labeled and which has 1 to 8 carbon atoms or a cycloalkoxy group in which at least one of carbon, oxygen, and hydrogen atoms contained therein is isotope-labeled and which has 3 to 8 carbon atoms.Type: ApplicationFiled: May 21, 2012Publication date: July 10, 2014Applicant: Kyorin Pharmaceutical Co., LtdInventor: Toshikazu Yamaoka
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Publication number: 20130196182Abstract: A PTC device as well as an electrical device such as a battery pack or a dry-cell type secondary cell containing a PTC device and a secondary cell is made more compact. The PTC device includes (1) a PTC component including a laminar polymer PTC element having an electrically conductive filler and a polymer material, and a metal electrode disposed on a surface of each side of the polymer PTC element; and (2) a lead positioned at least in part on the metal electrode of the PTC component, and connected to the metal electrode by an electrically conductive material. An exposed part of the electrically conductive material is covered by a protective member including a polypropylene resin, a nylon resin or an epoxy resin.Type: ApplicationFiled: July 1, 2011Publication date: August 1, 2013Applicant: Tyco Electronics Japan G.K.Inventors: Arata Tanaka, Toshikazu Yamaoka, Haruhisa Miyagi