Patents by Inventor Hiroki Itakura

Hiroki Itakura 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: 20230275241
    Abstract: A fuel cell assembly includes an electrode member that has a membrane electrode assembly having an electrolyte membrane and an electrode catalyst layer, and gas diffusion layers; a solid rubber gasket that is disposed in a frame shape on an outward side of the electrode member in a surface direction; and a bonding member that is disposed in a frame shape on the outward side of the electrode member in the surface direction, is bonded to the electrode member and the gasket, and integrates these. A form of bonding the bonding member to the electrode member is at least one of impregnation with the gas diffusion layers and bonding to the membrane electrode assembly. A thickness of the bonding member is equal to or larger than a thickness of the gas diffusion layer, and at least a portion on a surface of the bonding member is coated with the gasket.
    Type: Application
    Filed: May 8, 2023
    Publication date: August 31, 2023
    Applicant: Sumitomo Riko Company Limited
    Inventors: Hideya KADONO, Hideki OSHIMA, Hiroki ITAKURA
  • Patent number: 10381662
    Abstract: A separator for a fuel cell, to be disposed opposing to a membrane electrode assembly, is provided. The separator includes a separator central area portion opposing to a center area of the membrane electrode assembly that concerns generating power, an outer edge portion located in an outer edge of the separator central area portion, a rubber molded body made of rubber, the rubber molded body being formed in the outer edge portion by die-casting a die-casting rubber material using die, and an adhesive layer formed in the outer edge portion, for adhering the rubber molded body to the outer edge portion. The adhesive layer is formed over an adhesive layer area that includes and is larger than an area where the rubber molded body is die-casted in the outer edge portion. Thus, a disadvantage due to burrs which are generated when die-casting the rubber molded body can be reduced.
    Type: Grant
    Filed: November 6, 2015
    Date of Patent: August 13, 2019
    Assignees: Toyota Jidosha Kabushiki Kaisha, Sumitomo Riko Company Limited
    Inventors: Hideya Kadono, Kenji Sato, Takuya Kurihara, Fumishige Shizuku, Hiroki Itakura, Takahiro Aoki
  • Patent number: 10270106
    Abstract: There is provided a terminal plate comprising a plate stacked body including a first metal plate that is electrically conductive and has a current collecting terminal for power collection, and second metal plates that have higher corrosion resistance than the first metal plate and are placed across the first metal plate. A first gasket is mounted to the second metal plate and is provided to surround at least a gas flow hole used for supply of a gas on the second metal plate-side. A second gasket is mounted to the second metal plate and is provided to surround a cooling water flow area which communicates with a cooling water flow hole used for supply of cooling water on the second metal plate-side. The current collecting terminal is protruded from a plate outer circumferential end of the first metal plate in a direction from one flow hole of the gas flow hole and the cooling water flow hole toward the plate outer circumferential end of the first metal plate.
    Type: Grant
    Filed: November 10, 2015
    Date of Patent: April 23, 2019
    Assignees: Toyota Jidosha Kabushiki Kaisha, Sumitomo Riko Company Limited
    Inventors: Kenji Sato, Hiroki Itakura, Takahiro Aoki
  • Patent number: 9991524
    Abstract: In a fuel cell separator and the like, a technology for reducing the separation of a flow path rib which rectifies the flow of a fluid is desired. A separator used in a fuel cell is provided, the separator including: a separator main body that includes a fluid flow region through which a reactive gas or a coolant flows, a through-hole through which the reactive gas or the coolant flows, and a connection portion which connects the fluid flow region and the through-hole; and a flow rectifying portion that is arranged by being adhered on the connection portion and that rectifies flow of the reactive gas or the coolant between the fluid flow region and the through-hole, where the flow rectifying portion includes a plurality of protruded portions and a coupling portion which is thinner than the protruded portions and which couples the protruded portions.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: June 5, 2018
    Assignees: Toyota Jidosha Kabushiki Kaisha, Sumitomo Riko Company Limited
    Inventors: Kenji Sato, Hiroki Itakura, Takahiro Aoki
  • Patent number: 9470314
    Abstract: A rubber gasket for a fuel cell is interposed between a first member and a second member stacked in the fuel cell. The fuel cell includes: a seat portion arranged on a surface of the first member; and a lip portion that includes a first hill portion projecting from the seat portion toward the second member and having a curved surface with a first curvature radius and a second hill portion projecting from the first hill portion toward the second member and having a curved surface with a second curvature radius smaller than the first curvature radius, and that makes elastic contact with the second member. The seat portion includes a planar inclined surface inclined with respect to the surface direction at a connecting portion leading to a bottom of the first hill portion.
    Type: Grant
    Filed: April 6, 2015
    Date of Patent: October 18, 2016
    Assignees: SUMITOMO RIKO COMPANY LIMITED, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hideya Kadono, Hiroki Itakura, Kenji Sato, Takuya Kurihara, Hideaki Tanahashi
  • Publication number: 20160141636
    Abstract: A separator for a fuel cell, to be disposed opposing to a membrane electrode assembly, is provided. The separator includes a separator central area portion opposing to a center area of the membrane electrode assembly that concerns generating power, an outer edge portion located in an outer edge of the separator central area portion, a rubber molded body made of rubber, the rubber molded body being formed in the outer edge portion by die-casting a die-casting rubber material using die, and an adhesive layer formed in the outer edge portion, for adhering the rubber molded body to the outer edge portion. The adhesive layer is formed over an adhesive layer area that includes and is larger than an area where the rubber molded body is die-casted in the outer edge portion. Thus, a disadvantage due to burrs which are generated when die-casting the rubber molded body can be reduced.
    Type: Application
    Filed: November 6, 2015
    Publication date: May 19, 2016
    Applicants: TOYOTA JODOSHA KABUSHIKI KAISHA, Sumitomo Riko Company Limited
    Inventors: Hideya KADONO, Kenji SATO, Takuya KURIHARA, Fumishige SHIZUKU, Hiroki ITAKURA, Takahiro AOKI
  • Publication number: 20160141638
    Abstract: There is provided a terminal plate comprising a plate stacked body including a first metal plate that is electrically conductive and has a current collecting terminal for power collection, and second metal plates that have higher corrosion resistance than the first metal plate and are placed across the first metal plate. A first gasket is mounted to the second metal plate and is provided to surround at least a gas flow hole used for supply of a gas on the second metal plate-side. A second gasket is mounted to the second metal plate and is provided to surround a cooling water flow area which communicates with a cooling water flow hole used for supply of cooling water on the second metal plate-side. The current collecting terminal is protruded from a plate outer circumferential end of the first metal plate in a direction from one flow hole of the gas flow hole and the cooling water flow hole toward the plate outer circumferential end of the first metal plate.
    Type: Application
    Filed: November 10, 2015
    Publication date: May 19, 2016
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, Sumitomo Riko Company Limited
    Inventors: Kenji SATO, Hiroki Itakura, Takahiro Aoki
  • Publication number: 20160141637
    Abstract: In a fuel cell separator and the like, a technology for reducing the separation of a flow path rib which rectifies the flow of a fluid is desired. A separator used in a fuel cell is provided, the separator including: a separator main body that includes a fluid flow region through which a reactive gas or a coolant flows, a through-hole through which the reactive gas or the coolant flows, and a connection portion which connects the fluid flow region and the through-hole; and a flow rectifying portion that is arranged by being adhered on the connection portion and that rectifies flow of the reactive gas or the coolant between the fluid flow region and the through-hole, where the flow rectifying portion includes a plurality of protruded portions and a coupling portion which is thinner than the protruded portions and which couples the protruded portions.
    Type: Application
    Filed: November 5, 2015
    Publication date: May 19, 2016
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, Sumitomo Riko Company Limited
    Inventors: Kenji SATO, Hiroki Itakura, Takahiro Aoki
  • Publication number: 20150380694
    Abstract: A rubber gasket for a fuel cell is interposed between a first member and a second member stacked in the fuel cell. The fuel cell includes: a seat portion arranged on a surface of the first member; and a lip portion that includes a first hill portion projecting from the seat portion toward the second member and having a curved surface with a first curvature radius and a second hill portion projecting from the first hill portion toward the second member and having a curved surface with a second curvature radius smaller than the first curvature radius, and that makes elastic contact with the second member. The seat portion includes a planar inclined surface inclined with respect to the surface direction at a connecting portion leading to a bottom of the first hill portion.
    Type: Application
    Filed: April 6, 2015
    Publication date: December 31, 2015
    Applicants: SUMITOMO RIKO COMPANY LIMITED, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hideya KADONO, Hiroki ITAKURA, Kenji SATO, Takuya KURIHARA, Hideaki TANAHASHI
  • Patent number: 8328436
    Abstract: An optical module includes a receptacle for receiving an optical connector attached to a distal end of an optical fiber, and a lens body having a contact surface coming into contact with the distal end of the optical fiber when the receptacle receives the optical connector. The lens body has the contact surface and an opposing surface opposing the contact surface, and further has a columnar base held by the receptacle, a lens portion formed on the opposing surface integrally with the base, and a flat portion. The lens portion is surrounded by the flat portion and is off-centered with respect to the base.
    Type: Grant
    Filed: March 19, 2010
    Date of Patent: December 11, 2012
    Assignees: Renesas Electronics Corporation, Sei Optifrontier Co., Ltd.
    Inventors: Kazuhiro Mitamura, Shigeru Moribayashi, Junichi Shimizu, Hideyuki Yamada, Shunsuke Okamoto, Masahiko Takeda, Shigeki Asahi, Hiroki Itakura
  • Publication number: 20100239212
    Abstract: An optical module includes a receptacle for receiving an optical connector attached to a distal end of an optical fiber, and a lens body having a contact surface coming into contact with the distal end of the optical fiber when the receptacle receives the optical connector. The lens body has the contact surface and an opposing surface opposing the contact surface, and further has a columnar base held by the receptacle, a lens portion formed on the opposing surface integrally with the base, and a flat portion. The lens portion is surrounded by the flat portion and is off-centered with respect to the base.
    Type: Application
    Filed: March 19, 2010
    Publication date: September 23, 2010
    Applicants: NEC ELECTRONICS CORPORATION, TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: KAZUHIRO MITAMURA, SHIGERU MORIBAYASHI, JUNICHI SHIMIZU, HIDEYUKI YAMADA, SHUNSUKE OKAMOTO, MASAHIKO TAKEDA, SHIGEKI ASAHI, HIROKI ITAKURA
  • Publication number: 20070193304
    Abstract: To provide a glass molding die which is more excellent in durability than the conventional ones. A glass molding die 10 includes a base body 12, an Au layer 14 which is laminated on a surface of the base body 12, and an Rh layer 16 which is laminated on a surface of the Au layer 14. On a surface of the Rh layer 16, an Ir-containing layer may be further laminated. The Au layer 14 functions as a bonding layer, the Rh layer 16 functions as an anti diffusion layer, and the Ir-containing layer functions as a mold releasing layer. The Au layer 14, the Rh layer 16, and the Ir-containing layer are preferably formed by plating.
    Type: Application
    Filed: February 7, 2007
    Publication date: August 23, 2007
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Hiroki Itakura, Ryo Minoshima
  • Patent number: 6882790
    Abstract: An optical fiber array including a substrate having a grooved portion and a planar portion which are formed integrally on opposite sides of a shoulder, and wherein the grooved portion has a plurality of grooves each defined by two side walls forming a predetermined angle therebetween, and a plurality of optical fibers are accommodated within the respective grooves and supported by the planar portion. Each of the optical fibers accommodated in the grooves is forced onto the two side walls by a covering plate disposed on the grooved portion, and thereby positioned.
    Type: Grant
    Filed: September 24, 2003
    Date of Patent: April 19, 2005
    Assignees: Sumitomo Electric Industries, Ltd., Tokai Rubber Industries, Ltd.
    Inventors: Shinsuke Niiyama, Yukihiro Yokomachi, Hiroki Itakura
  • Publication number: 20040165854
    Abstract: An optical fiber array including a substrate having a grooved portion and a planar portion which are formed integrally on opposite sides of a shoulder, and wherein the grooved portion has a plurality of grooves each defined by two side walls forming a predetermined angle therebetween, and a plurality of optical fibers are accommodated within the respective grooves and supported by the planar portion. Each of the optical fibers accommodated in the grooves is forced onto the two side walls by a covering plate disposed on the grooved portion, and thereby positioned.
    Type: Application
    Filed: September 24, 2003
    Publication date: August 26, 2004
    Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Shinsuke Niiyama, Yukihiro Yokomachi, Hiroki Itakura
  • Patent number: 5731528
    Abstract: A rope tension measuring apparatus for measuring rope tension of a plurality of main ropes that suspend an elevator car and a counterweight and adjustment quantities of tension adjusting springs for the main ropes. The apparatus comprises a portable measuring device comprising traveling-wave detector means directly attached to the elevator main rope for detecting a traveling wave that is generated by applying an instantaneous displacement to the main rope, traveling-wave passage velocity computing means for measuring the passage velocity of the traveling wave, rope tension computing means for computing the rope tension based on the passage velocity, spring adjustment quantity computing means for computing a spring adjustment quantity for the rope tension adjusting springs, and output means for outputting these computed results, based on the variation of passage velocities of the plurality of main ropes.
    Type: Grant
    Filed: November 15, 1996
    Date of Patent: March 24, 1998
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Mitsubishi Electric Building Techno-Service Co., Ltd.
    Inventors: Yoshiaki Yamazaki, Hiroki Itakura