Patents by Inventor Tsuyoshi Seguchi
Tsuyoshi Seguchi 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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Patent number: 12331409Abstract: The present disclosure relates to a fuel cell separator manufacturing method involving immersing a stainless-steel base material formed into a shape of a separator in an acidic solution having a fluorine ion concentration of 0.1 ppm or higher and a pH of 1±0.2 at 80° C.±5° C. for 60 minutes or longer to perform a modification treatment on a surface of the stainless-steel base material.Type: GrantFiled: January 8, 2024Date of Patent: June 17, 2025Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yusuke Nomura, Hijiri Hirata, Tsuyoshi Seguchi
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Publication number: 20240301564Abstract: The present disclosure relates to a fuel cell separator manufacturing method involving immersing a stainless-steel base material formed into a shape of a separator in an acidic solution having a fluorine ion concentration of 0.1 ppm or higher and a pH of 1±0.2 at 80° C.±5° C. for 60 minutes or longer to perform a modification treatment on a surface of the stainless-steel base material.Type: ApplicationFiled: January 8, 2024Publication date: September 12, 2024Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yusuke NOMURA, Hijiri HIRATA, Tsuyoshi SEGUCHI
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Patent number: 11069905Abstract: A method for manufacturing a fuel cell separator that ensures an improved corrosion resistance under usage environment of a fuel cell and restraining an increase of a contact resistance with a power generation unit by enhancing a sticking force of a conductive carbon film formed on a surface in contact with the power generation unit on a surface of a titanium substrate is provided. It is a method for manufacturing a fuel cell separator. The fuel cell separator includes a contact portion that is in contact with a power generation unit so as to partition the power generation units including electrodes of the fuel cell, and includes a conductive carbon film formed on the contact portion. First, a titanium substrate that has a plurality of projecting portions formed corresponding to a shape of the contact portion and recessed portions for gas flow channels formed between the projecting portions are prepared as a substrate of the separator.Type: GrantFiled: December 11, 2018Date of Patent: July 20, 2021Assignee: Toyota Jidosha Kabushiki KaishaInventors: Tsuyoshi Seguchi, Koutaro Ikeda, Yukihiro Shibata
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Publication number: 20190190035Abstract: A method for manufacturing a fuel cell separator that ensures an improved corrosion resistance under usage environment of a fuel cell and restraining an increase of a contact resistance with a power generation unit by enhancing a sticking force of a conductive carbon film formed on a surface in contact with the power generation unit on a surface of a titanium substrate is provided. It is a method for manufacturing a fuel cell separator. The fuel cell separator includes a contact portion that is in contact with a power generation unit so as to partition the power generation units including electrodes of the fuel cell, and includes a conductive carbon film formed on the contact portion. First, a titanium substrate that has a plurality of projecting portions formed corresponding to a shape of the contact portion and recessed portions for gas flow channels formed between the projecting portions are prepared as a substrate of the separator.Type: ApplicationFiled: December 11, 2018Publication date: June 20, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tsuyoshi SEGUCHI, Koutaro IKEDA, Yukihiro SHIBATA
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Publication number: 20160141634Abstract: Disclosed is a separator for a fuel cell which is able to suppress peeling off or cracking of a conductive carbon film occurring at the time of insertion and extraction of a cell monitor terminal. The separator for a fuel cell includes a terminal attachment portion which is disposed in a region other than a power generation region engaged in power generation of a separator, and to which a cell monitor terminal capable of detecting the voltage of the single cell is connected, and a conductive carbon thin film layer which is formed on the terminal attachment portion, and the hardness of the carbon thin film layer is greater than or equal to 5 GPa and less than or equal to 10 GPa.Type: ApplicationFiled: November 11, 2015Publication date: May 19, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tsuyoshi SEGUCHI, Yusuke WATANABE
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Patent number: 9169542Abstract: This invention aims to provide a recycled magnesium alloy having a good corrosion resistance and a process for producing the same. The process of the present invention comprises an adjusting step of adjusting composition of molten metal of a magnesium alloy so as to comprise, by mass: Al: 5 to 10%, Zn: not less than 1% and not less than three times of Cu content (%), Mn: 0.1 to 1.5% and the remainder: Mg and impurities with or without one or more reforming elements. While the upper limit of the Al content is restricted to a low level, the Zn content is increased in accordance with the Cu content. Therefore, the recycled magnesium alloy produced by this process can effectively suppress corrosion caused by Cu, which is one of corrosion-causing elements.Type: GrantFiled: June 9, 2010Date of Patent: October 27, 2015Assignees: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroyuki Kawabata, Naohisa Nishino, Sonoko Nishino, Yasushi Iwata, Yoshikazu Genma, Tsuyoshi Seguchi
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Patent number: 8231742Abstract: To provide an iron-based composite material which has higher abrasion and seizure resistance, and more excellent impact absorbing property as compared with a steel material, and which has higher mechanical strength as compared with a cast iron material, and also a method of manufacturing the iron-based composite material. The iron-based composite material includes at least a steel structure layer 12, a cast iron structure layer 14, and a carburized structure layer 13 which is formed by carburizing the steel structure between the steel structure layer 12 and the cast iron structure layer 14.Type: GrantFiled: November 9, 2007Date of Patent: July 31, 2012Assignee: Toyota Jidosha Kabushiki KaishaInventors: Tsuyoshi Seguchi, Masatoshi Oguro
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Publication number: 20120156087Abstract: This invention aims to provide a recycled magnesium alloy having a good corrosion resistance and a process for producing the same. The process of the present invention comprises an adjusting step of adjusting composition of molten metal of a magnesium alloy so as to comprise, by mass: Al: 5 to 10%, Zn: not less than 1% and not less than three times of Cu content (%), Mn: 0.1 to 1.5% and the remainder: Mg and impurities with or without one or more reforming elements. While the upper limit of the Al content is restricted to a low level, the Zn content is increased in accordance with the Cu content. Therefore, the recycled magnesium alloy produced by this process can effectively suppress corrosion caused by Cu, which is one of corrosion-causing elements.Type: ApplicationFiled: June 6, 2010Publication date: June 21, 2012Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOInventors: Hiroyuki Kawabata, Naohisa Nishino, Sonoko Nishino, Yasushi Iwata, Yoshikazu Genma, Tsuyoshi Seguchi
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Publication number: 20100012228Abstract: To provide an iron-based composite material which has higher abrasion and seizure resistance, and more excellent impact absorbing property as compared with a steel material, and which has higher mechanical strength as compared with a cast iron material, and also a method of manufacturing the iron-based composite material. The iron-based composite material includes at least a steel structure layer 12, a cast iron structure layer 14, and a carburized structure layer 13 which is formed by carburizing the steel structure between the steel structure layer 12 and the cast iron structure layer 14.Type: ApplicationFiled: November 9, 2007Publication date: January 21, 2010Inventor: Tsuyoshi Seguchi