Patents by Inventor Yoshito Endo
Yoshito Endo 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: 11569521Abstract: The present disclosure provides a method for manufacturing a membrane electrode assembly for a fuel cell in which a transfer failure is suppressed. The present disclosure relates to a method for manufacturing a membrane electrode assembly for a fuel cell, which comprises intermittently applying a catalyst ink on a substrate sheet and drying the catalyst ink to form a catalyst layer on the substrate sheet, and transferring the catalyst layer from the substrate sheet onto an electrolyte membrane. The catalyst ink contains catalyst particles, an ionomer, an alcohol, and water, and a water content in the catalyst ink is 57% to 61% by weight of a total weight of the catalyst ink.Type: GrantFiled: March 30, 2020Date of Patent: January 31, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshito Endo, Katsuaki Tsuji, Noriaki Kitajima
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Publication number: 20200328444Abstract: The present disclosure provides a method for manufacturing a membrane electrode assembly for a fuel cell in which a transfer failure is suppressed. The present disclosure relates to a method for manufacturing a membrane electrode assembly for a fuel cell, which comprises intermittently applying a catalyst ink on a substrate sheet and drying the catalyst ink to form a catalyst layer on the substrate sheet, and transferring the catalyst layer from the substrate sheet onto an electrolyte membrane. The catalyst ink contains catalyst particles, an ionomer, an alcohol, and water, and a water content in the catalyst ink is 57% to 61% by weight of a total weight of the catalyst ink.Type: ApplicationFiled: March 30, 2020Publication date: October 15, 2020Inventors: Yoshito ENDO, Katsuaki TSUJI, Noriaki KITAJIMA
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Patent number: 10122039Abstract: A method of producing a dispersion liquid of a gelatinous electrolyte includes a water content reduction process of concentrating an aqueous dispersion liquid of an electrolyte at a temperature of 50° C. or less and reducing a water content in a concentrate of the electrolyte to 5% by mass or less based on the total mass of the concentrate of the electrolyte, and an alcohol addition process of adding an alcohol to the concentrate of the electrolyte obtained in the water content reduction process to form the dispersion liquid of the gelatinous electrolyte.Type: GrantFiled: November 6, 2015Date of Patent: November 6, 2018Assignee: Toyota Jidosha Kabushiki KaishaInventor: Yoshito Endo
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Publication number: 20180102563Abstract: An electrolyte structure body includes an electrolyte film and a protective film bonded to the electrolyte film. A total value of a polar component and a hydrogen bond component of surface tension of the protective film is 1 mN/m or less.Type: ApplicationFiled: September 27, 2017Publication date: April 12, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Yoshito ENDO
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Publication number: 20160133978Abstract: A method of producing a dispersion liquid of a gelatinous electrolyte includes a water content reduction process of concentrating an aqueous dispersion liquid of an electrolyte at a temperature of 50° C. or less and reducing a water content in a concentrate of the electrolyte to 5% by mass or less based on the total mass of the concentrate of the electrolyte, and an alcohol addition process of adding an alcohol to the concentrate of the electrolyte obtained in the water content reduction process to form the dispersion liquid of the gelatinous electrolyte.Type: ApplicationFiled: November 6, 2015Publication date: May 12, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Yoshito ENDO
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Patent number: 8637210Abstract: A first layered article (14a) in which a first electrolyte membrane (12a) and an anode-side catalyst layer (13a) are laminated, and a second layered article (14b) in which a second electrolyte membrane (12b) and a cathode-side catalyst layer (13b) are laminated, are formed. Then, the first layered article (14a) and the second layered article (14b) are disposed so that the electrolyte membrane-side surfaces of the two articles face each other. A reinforcement frame (20) is then disposed between the two articles. The whole layered assembly in this state is thermocompression-bonded. Thus, a membrane-electrode assembly (15) in which the reinforcement frame (20) is embedded within an electrolyte membrane (15) that is formed by the fusion of first electrolyte membrane (12a) and the second electrolyte membrane (12b) is obtained.Type: GrantFiled: July 21, 2009Date of Patent: January 28, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yoshihiro Hori, Yoshito Endo
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Patent number: 8206877Abstract: A membrane electrode assembly includes an ion conducting membrane; an anode catalyst layer arranged on one side of the ion conducting membrane; a cathode catalyst layer arranged on the other side of the ion conducting membrane; an anode diffusion layer arranged on an outer side of the anode catalyst layer; and a cathode diffusion layer arranged on an outer side of the cathode catalyst layer. Only in the anode catalyst layer, the density of a first catalyst layer portion located close to the anode diffusion layer is smaller than the density of a second catalyst layer portion located close to the ion conducting membrane.Type: GrantFiled: November 25, 2008Date of Patent: June 26, 2012Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yosuke Koike, Gang Xie, Yoshito Endo
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Publication number: 20110123910Abstract: A first layered article (14a) in which a first electrolyte membrane (12a) and an anode-side catalyst layer (13a) are laminated, and a second layered article (14b) in which a second electrolyte membrane (12b) and a cathode-side catalyst layer (13b) are laminated, are formed. Then, the first layered article (14a) and the second layered article (14b) are disposed so that the electrolyte membrane-side surfaces of the two articles face each other. A reinforcement frame (20) is then disposed between the two articles. The whole layered assembly in this state is thermocompression-bonded. Thus, a membrane-electrode assembly (15) in which the reinforcement frame (20) is embedded within an electrolyte membrane (15) that is formed by the fusion of first electrolyte membrane (12a) and the second electrolyte membrane (12b) is obtained.Type: ApplicationFiled: July 21, 2009Publication date: May 26, 2011Inventors: Yoshihiro Hori, Yoshito Endo
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Publication number: 20110122177Abstract: An ink jet recording apparatus comprising a color ink container having a capacity V1 accommodating therein a solvent polymerizable in the presence of an acid and a colorant, a reaction liquid container having a capacity V2 (V2<V1) accommodating therein a reaction liquid comprising a solvent, and a photo-acid generating agent capable of generating an acid when irradiated with light, a stirring container mixing the color ink and the reaction liquid at a mixing ratio of S1:S2 (the color ink:the reaction liquid) to prepare a recording ink, a color ink supply means feeding the color ink to the stirring container, a reaction liquid supply means feeding the reaction liquid to the stirring container, an ink jet recording head ejecting the recording ink to a recording medium, and a supply tube feeding the recording ink to the recording head.Type: ApplicationFiled: January 26, 2011Publication date: May 26, 2011Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHAInventors: Masashi HIROKI, Kazuhiko Ohtsu, Yoshito Endo, Toru Ushirogouchi, Ryozo Akiyama
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Patent number: 7896484Abstract: An ink jet recording apparatus comprising a color ink container having a capacity V1 accommodating therein a solvent polymerizable in the presence of an acid and a colorant, a reaction liquid container having a capacity V2 (V2<V1) accommodating therein a reaction liquid comprising a solvent, and a photo-acid generating agent capable of generating an acid when irradiated with light, a stirring container mixing the color ink and the reaction liquid at a mixing ratio of S1:S2 (the color ink:the reaction liquid) to prepare a recording ink, a color ink supply means feeding the color ink to the stirring container, a reaction liquid supply means feeding the reaction liquid to the stirring container, an ink jet recording head ejecting the recording ink to a recording medium, and a supply tube feeding the recording ink to the recording head.Type: GrantFiled: June 5, 2008Date of Patent: March 1, 2011Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki KaishaInventors: Masashi Hiroki, Kazuhiko Ohtsu, Yoshito Endo, Toru Ushirogouchi, Ryozo Akiyama
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Publication number: 20100304240Abstract: A membrane electrode assembly includes an ion conducting membrane; an anode catalyst layer arranged on one side of the ion conducting membrane; a cathode catalyst layer arranged on the other side of the ion conducting membrane; an anode diffusion layer arranged on an outer side of the anode catalyst layer; and a cathode diffusion layer arranged on an outer side of the cathode catalyst layer. Only in the anode catalyst layer, the density of a first catalyst layer portion located close to the anode diffusion layer is smaller than the density of a second catalyst layer portion located close to the ion conducting membrane.Type: ApplicationFiled: November 25, 2008Publication date: December 2, 2010Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yosuke Koike, Gang Xie, Yoshito Endo
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Publication number: 20100019193Abstract: Encapsulated electrode catalyst particles 30 has electrode catalyst particles 20 encapsulated by a resin 15 with external stimulus responsiveness, specifically, it has a coated structure. The electrode catalyst particles 20 are particles for which a carbon supported catalyst 21 and an electrolyte 22 are almost uniformly dispersed. The electrode catalyst particles 20 are coated with a resin 15 which has external stimulus responsiveness. After forming a thin film using encapsulated electrode catalyst particles 30, an electrode sheet formed by removing the capsule element by applying an external stimulus to the thin film is transferred onto the electrolyte membrane, and an electrode catalyst layer is formed. By doing this, it is possible to suppress agglomeration of the electrode catalyst particles and degradation of the electrode catalyst, so it is possible to improve composition stability of the electrode catalytic ink and also possible to reduce costs.Type: ApplicationFiled: December 3, 2007Publication date: January 28, 2010Inventor: Yoshito Endo
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Patent number: 7500745Abstract: There is disclosed a liquid ink including a photo acid generating agent that generates an acid upon irradiation with light, a coloring component, and at least one kind of a solvent that is polymerized in the presence of an acid. It is preferable that the amount of the photo acid generating agent contained in the liquid ink falls within a range of between 1 part by weight and 10 parts by weight relative to 100 parts by weight of the solvent, the coloring component consists of a pigment, and the solvent contains at least 50 parts by weight of an acid polymerizable compound, the acid polymerizing compound polymerizing in the presence of the acid, having an alicyclic skeleton and/or an aliphatic skeleton having a viscosity of 50 mPa·s or less and a boiling point of 150° C. or more under room temperature and atmospheric pressure.Type: GrantFiled: August 11, 2006Date of Patent: March 10, 2009Assignees: Toshiba Tec Kabushiki Kaisha, Kabushiki Kaisha ToshibaInventors: Toru Ushirogouchi, Chiaki Tanuma, Kazuhiko Ohtsu, Ryozo Akiyama, Masashi Hiroki, Yoshito Endo
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Publication number: 20080273066Abstract: An ink jet recording apparatus comprising a color ink container having a capacity V1 accommodating therein a solvent polymerizable in the presence of an acid and a colorant, a reaction liquid container having a capacity V2 (V2<V1) accommodating therein a reaction liquid comprising a solvent, and a photo-acid generating agent capable of generating an acid when irradiated with light, a stirring container mixing the color ink and the reaction liquid at a mixing ratio of S1:S2 (the color ink:the reaction liquid) to prepare a recording ink, a color ink supply means feeding the color ink to the stirring container, a reaction liquid supply means feeding the reaction liquid to the stirring container, an ink jet recording head ejecting the recording ink to a recording medium, and a supply tube feeding the recording ink to the recording head.Type: ApplicationFiled: June 5, 2008Publication date: November 6, 2008Applicants: TOSHIBA TEC KABUSHIKI KAISHA, KABUSHIKI KAISHA TOSHIBAInventors: Masashi Hiroki, Kazuhiko Ohtsu, Yoshito Endo, Toro Ushirogouchi, Ryozo Akiyama
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Patent number: 7417074Abstract: There is disclosed an ink jet recording apparatus comprising a color ink container having a capacity V1 accommodating therein a solvent polymerizable in the presence of an acid and a colorant, a reaction liquid container having a capacity V2 (V2<V1) accommodating therein a reaction liquid comprising a solvent, and a photo-acid generating agent capable of generating an acid when irradiated with light, an stirring container mixing the color ink and the reaction liquid at a mixing ratio of S1:S2 (the color ink:the reaction liquid) to prepare a recording ink, a color ink supply means feeding the color ink to the stirring container, a reaction liquid supply means feeding the reaction liquid to the stirring container, an ink jet recording head ejecting the recording ink to a recording medium, and a supply tube feeding the recording ink to the recording head.Type: GrantFiled: March 22, 2004Date of Patent: August 26, 2008Assignees: Toshiba Tec Kabushiki Kaisha, Kabushiki Kaisha ToshibaInventors: Masashi Hiroki, Kazuhiko Ohtsu, Yoshito Endo, Toru Ushirogouchi, Ryozo Akiyama
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Patent number: 7387380Abstract: There is disclosed a liquid ink including a photo acid generating agent that generates an acid upon irradiation with light, a coloring component, and at least one kind of a solvent that is polymerized in the presence of an acid. It is preferable that the amount of the photo acid generating agent contained in the liquid ink falls within a range of between 1 part by weight and 10 parts by weight relative to 100 parts by weight of the solvent, the coloring component consists of a pigment, and the solvent contains at least 50 parts by weight of an acid polymerizable compound, the acid polymerizing compound polymerizing in the presence of the acid, having an alicyclic skeleton and/or an aliphatic skeleton having a viscosity of 50 mPa·s or less and a boiling point of 150° C. or more under room temperature and atmospheric pressure.Type: GrantFiled: August 11, 2006Date of Patent: June 17, 2008Assignees: Toshiba Tec Kabushiki Kaisha, Kabushiki Kaisha ToshibaInventors: Toru Ushirogouchi, Chiaki Tanuma, Kazuhiko Ohtsu, Ryozo Akiyama, Masashi Hiroki, Yoshito Endo
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Publication number: 20060274136Abstract: There is disclosed a liquid ink including a photo acid generating agent that generates an acid upon irradiation with light, a coloring component, and at least one kind of a solvent that is polymerized in the presence of an acid. It is preferable that the amount of the photo acid generating agent contained in the liquid ink falls within a range of between 1 part by weight and 10 parts by weight relative to 100 parts by weight of the solvent, the coloring component consists of a pigment, and the solvent contains at least 50 parts by weight of an acid polymerizable compound, the acid polymerizing compound polymerizing in the presence of the acid, having an alicyclic skeleton and/or an aliphatic skeleton having a viscosity of 50 mPa·s or less and a boiling point of 150° C. or more under room temperature and atmospheric pressure.Type: ApplicationFiled: August 11, 2006Publication date: December 7, 2006Inventors: Toru Ushirogouchi, Chiaki Tanuma, Kazuhiko Ohtsu, Ryozo Akiyama, Masashi Hiroki, Yoshito Endo
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Publication number: 20060274135Abstract: There is disclosed a liquid ink including a photo acid generating agent that generates an acid upon irradiation with light, a coloring component, and at least one kind of a solvent that is polymerized in the presence of an acid. It is preferable that the amount of the photo acid generating agent contained in the liquid ink falls within a range of between 1 part by weight and 10 parts by weight relative to 100 parts by weight of the solvent, the coloring component consists of a pigment, and the solvent contains at least 50 parts by weight of an acid polymerizable compound, the acid polymerizing compound polymerizing in the presence of the acid, having an alicyclic skeleton and/or an aliphatic skeleton having a viscosity of 50 mPa·s or less and a boiling point of 150° C. or more under room temperature and atmospheric pressure.Type: ApplicationFiled: August 11, 2006Publication date: December 7, 2006Inventors: Toru Ushirogouchi, Chiaki Tanuma, Kazuhiko Ohtsu, Ryozo Akiyama, Masashi Hiroki, Yoshito Endo
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Patent number: 7125112Abstract: There is disclosed a liquid ink including a photo acid generating agent that generates an acid upon irradiation with light, a coloring component, and at least one kind of a solvent that is polymerized in the presence of an acid. It is preferable that the amount of the photo acid generating agent contained in the liquid ink falls within a range of between 1 part by weight and 10 parts by weight relative to 100 parts by weight of the solvent, the coloring component consists of a pigment, and the solvent contains at least 50 parts by weight of an acid polymerizable compound, the acid polymerizing compound polymerizing in the presence of the acid, having an alicyclic skeleton and/or an aliphatic skeleton having a viscosity of 50 mPa·s or less and a boiling point of 150° C. or more under room temperature and atmospheric pressure.Type: GrantFiled: March 31, 2005Date of Patent: October 24, 2006Assignees: Toshiba Tec Kabushiki Kaisha, Kabushiki Kaisha ToshibaInventors: Toru Ushirogouchi, Chiaki Tanuma, Kazuhiko Ohtsu, Ryozo Akiyama, Masashi Hiroki, Yoshito Endo
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Patent number: 7108367Abstract: There is disclosed a liquid ink including a photo acid generating agent that generates an acid upon irradiation with light, a coloring component, and at least one kind of a solvent that is polymerized in the presence of an acid. It is preferable that the amount of the photo acid generating agent contained in the liquid ink falls within a range of between 1 part by weight and 10 parts by weight relative to 100 parts by weight of the solvent, the coloring component consists of a pigment, and the solvent contains at least 50 parts by weight of an acid polymerizable compound, the acid polymerizing compound polymerizing in the presence of the acid, having an alicyclic skeleton and/or an aliphatic skeleton having a viscosity of 50 mpa·s or less and a boiling point of 150° C. or more under room temperature and atmospheric pressure.Type: GrantFiled: March 31, 2005Date of Patent: September 19, 2006Assignees: Toshiba Tec Kabushiki Kaisha, Kabushiki Kaisha ToshibaInventors: Toru Ushirogouchi, Chiaki Tanuma, Kazuhiko Ohtsu, Ryozo Akiyama, Masashi Hiroki, Yoshito Endo