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).
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Publication number: 20230275241Abstract: 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: ApplicationFiled: May 8, 2023Publication date: August 31, 2023Applicant: Sumitomo Riko Company LimitedInventors: Hideya KADONO, Hideki OSHIMA, Hiroki ITAKURA
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Patent number: 10381662Abstract: 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: GrantFiled: November 6, 2015Date of Patent: August 13, 2019Assignees: Toyota Jidosha Kabushiki Kaisha, Sumitomo Riko Company LimitedInventors: Hideya Kadono, Kenji Sato, Takuya Kurihara, Fumishige Shizuku, Hiroki Itakura, Takahiro Aoki
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Patent number: 10270106Abstract: 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: GrantFiled: November 10, 2015Date of Patent: April 23, 2019Assignees: Toyota Jidosha Kabushiki Kaisha, Sumitomo Riko Company LimitedInventors: Kenji Sato, Hiroki Itakura, Takahiro Aoki
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Patent number: 9991524Abstract: 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: GrantFiled: November 5, 2015Date of Patent: June 5, 2018Assignees: Toyota Jidosha Kabushiki Kaisha, Sumitomo Riko Company LimitedInventors: Kenji Sato, Hiroki Itakura, Takahiro Aoki
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Patent number: 9470314Abstract: 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: GrantFiled: April 6, 2015Date of Patent: October 18, 2016Assignees: SUMITOMO RIKO COMPANY LIMITED, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hideya Kadono, Hiroki Itakura, Kenji Sato, Takuya Kurihara, Hideaki Tanahashi
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Publication number: 20160141636Abstract: 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: ApplicationFiled: November 6, 2015Publication date: May 19, 2016Applicants: TOYOTA JODOSHA KABUSHIKI KAISHA, Sumitomo Riko Company LimitedInventors: Hideya KADONO, Kenji SATO, Takuya KURIHARA, Fumishige SHIZUKU, Hiroki ITAKURA, Takahiro AOKI
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Publication number: 20160141638Abstract: 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: ApplicationFiled: November 10, 2015Publication date: May 19, 2016Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, Sumitomo Riko Company LimitedInventors: Kenji SATO, Hiroki Itakura, Takahiro Aoki
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Publication number: 20160141637Abstract: 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: ApplicationFiled: November 5, 2015Publication date: May 19, 2016Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, Sumitomo Riko Company LimitedInventors: Kenji SATO, Hiroki Itakura, Takahiro Aoki
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Publication number: 20150380694Abstract: 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: ApplicationFiled: April 6, 2015Publication date: December 31, 2015Applicants: SUMITOMO RIKO COMPANY LIMITED, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hideya KADONO, Hiroki ITAKURA, Kenji SATO, Takuya KURIHARA, Hideaki TANAHASHI
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Patent number: 8328436Abstract: 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: GrantFiled: March 19, 2010Date of Patent: December 11, 2012Assignees: Renesas Electronics Corporation, Sei Optifrontier Co., Ltd.Inventors: Kazuhiro Mitamura, Shigeru Moribayashi, Junichi Shimizu, Hideyuki Yamada, Shunsuke Okamoto, Masahiko Takeda, Shigeki Asahi, Hiroki Itakura
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Publication number: 20100239212Abstract: 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: ApplicationFiled: March 19, 2010Publication date: September 23, 2010Applicants: NEC ELECTRONICS CORPORATION, TOKAI RUBBER INDUSTRIES, LTD.Inventors: KAZUHIRO MITAMURA, SHIGERU MORIBAYASHI, JUNICHI SHIMIZU, HIDEYUKI YAMADA, SHUNSUKE OKAMOTO, MASAHIKO TAKEDA, SHIGEKI ASAHI, HIROKI ITAKURA
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Publication number: 20070193304Abstract: 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: ApplicationFiled: February 7, 2007Publication date: August 23, 2007Applicant: TOKAI RUBBER INDUSTRIES, LTD.Inventors: Hiroki Itakura, Ryo Minoshima
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Patent number: 6882790Abstract: 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: GrantFiled: September 24, 2003Date of Patent: April 19, 2005Assignees: Sumitomo Electric Industries, Ltd., Tokai Rubber Industries, Ltd.Inventors: Shinsuke Niiyama, Yukihiro Yokomachi, Hiroki Itakura
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Publication number: 20040165854Abstract: 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: ApplicationFiled: September 24, 2003Publication date: August 26, 2004Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., TOKAI RUBBER INDUSTRIES, LTD.Inventors: Shinsuke Niiyama, Yukihiro Yokomachi, Hiroki Itakura
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Patent number: 5731528Abstract: 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: GrantFiled: November 15, 1996Date of Patent: March 24, 1998Assignees: Mitsubishi Denki Kabushiki Kaisha, Mitsubishi Electric Building Techno-Service Co., Ltd.Inventors: Yoshiaki Yamazaki, Hiroki Itakura