Patents by Inventor Yukinori Akamoto
Yukinori Akamoto 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: 8765311Abstract: A fuel cell (1) includes an electromotive unit (2) having a membrane electrode assembly (MEA) (12), a fuel storage unit (4) storing a liquid fuel, and a fuel supply mechanism (3) supplying the fuel from the fuel storage unit (4) to a fuel electrode (7) of the membrane electrode assembly (12). The membrane electrode assembly (12) has a gas vent hole (17) provided in a manner to penetrate through at least an electrolyte membrane (11) to let a gas component generated on a side of the fuel electrode (7) escape to a side of an air electrode (10).Type: GrantFiled: February 25, 2008Date of Patent: July 1, 2014Assignee: Murata Manufacturing Co., Ltd.Inventors: Hideyuki Oozu, Yukinori Akamoto, Yuuichi Sato, Genta Oomichi, Hirofumi Kan, Daisuke Watanabe, Nobuyasu Negishi, Yuichi Yoshida, Asako Sato
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Patent number: 8404399Abstract: The present invention relates to a fuel cell including: a membrane electrode assembly (2) having a fuel electrode (13), an air electrode (16), and an electrolyte membrane (17) sandwiched therebetween; and a fuel storage unit (4) storing a liquid fuel. The fuel cell is capable of continuously generating electricity for long hours only by being replenished with a fuel, and therefore, attempts have been made to miniaturize the fuel cell to use it as a power source of portable electronic devices. When the membrane electrode assembly and the fuel storage unit in the fuel cell are connected via a flow path, a fuel supply state becomes uneven depending on the shape and the like of the flow path even though a supply amount of the fuel can be adjusted, which causes a problem such as a decrease in an output of the fuel cell.Type: GrantFiled: December 21, 2007Date of Patent: March 26, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Hiroyuki Hasebe, Yukinori Akamoto, Hideyuki Oozu, Hidenori Suzuki, Koichi Kawamura, Yuuichi Sato, Genta Oomichi, Nobuyasu Negishi, Takashi Shimoyamada, Yuichi Yoshida, Hirofumi Kan, Kenichi Takahashi
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Publication number: 20120028161Abstract: According to one embodiment, a fuel cell includes a membrane electrode assembly including a plurality of anodes, a plurality of cathodes each forming a pair with a corresponding one of the plurality of anodes, and an electrolyte membrane interposed between the anodes and the cathodes, a current collector configured to interpose the membrane electrode assembly in between, a fuel supply mechanism arranged on the side of the anodes of the membrane electrode assembly and configured to supply the anodes with a fuel, and a moisturizing layer arranged on the side of the cathodes of the membrane electrode assembly. The current collector includes a slit arranged so as to face a region between the cathodes.Type: ApplicationFiled: October 6, 2011Publication date: February 2, 2012Inventors: Yuuichi Sato, Daisuke Watanabe, Genta Oomichi, Nobuyasu Negishi, Hirofumi Kan, Yukinori Akamoto
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Patent number: 7986276Abstract: In electronic equipment using a fuel cell as a power source, an antenna and a fuel cell, which are provided in a lower case of a main body receiving electronic parts, are arranged at a given distance from each other. An acceptable communication state can be established in the electronic equipment.Type: GrantFiled: February 13, 2009Date of Patent: July 26, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Yoshie Ozeki, Hiroyuki Hasebe, Hideyuki Oozu, Yukinori Akamoto, Takashi Shimoyamada, Hideaki Yasui, Kenichi Takahashi, Nobuyasu Negishi, Kiyoshi Senoue, Koichi Kawamura
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Patent number: 7875999Abstract: A PDA, which functions as an electronic unit, includes power supply which includes a fuel cell unit and an auxiliary power supply which is charged by an output of the fuel cell unit. A non-use state of the PDA is detected by non-use detection unit. Upon detection of the non-use state by the non-use detection unit, the output from the fuel cell unit is stopped and an output of the auxiliary power supply is shut off.Type: GrantFiled: September 23, 2008Date of Patent: January 25, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Hidenori Suzuki, Kiyoshi Senoue, Makoto Miyahara, Kenichi Takahashi, Michiyuki Kitamoto, Yukinori Akamoto, Yoshie Ozeki, Takashi Shimoyamada, Hideaki Yasui, Hiroyuki Hasebe, Koichi Kawamura
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Publication number: 20110008704Abstract: The present invention relates to a fuel cell including: a membrane electrode assembly (2) having a fuel electrode (13), an air electrode (16), and an electrolyte membrane (17) sandwiched therebetween; and a fuel storage unit (4) storing a liquid fuel. The fuel cell is capable of continuously generating electricity for long hours only by being replenished with a fuel, and therefore, attempts have been made to miniaturize the fuel cell to use it as a power source of portable electronic devices. When the membrane electrode assembly and the fuel storage unit in the fuel cell are connected via a flow path, a fuel supply state becomes uneven depending on the shape and the like of the flow path even though a supply amount of the fuel can be adjusted, which causes a problem such as a decrease in an output of the fuel cell.Type: ApplicationFiled: December 21, 2007Publication date: January 13, 2011Inventors: Hiroyuki Hasebe, Yukinori Akamoto, Hideyuki Oozu, Hidenori Suzuki, Koichi Kawamura, Yuuchi Sato, Genta Oomichi, Nobuyasu Negishi, Takashi Shimoyamada, Yuichi Yoshida, Hirofumi Kan, Kenichi Takahashi
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Publication number: 20100086826Abstract: A fuel cell (1) includes an electromotive unit (2) having a membrane electrode assembly (MEA) (12), a fuel storage unit (4) storing a liquid fuel, and a fuel supply mechanism (3) supplying the fuel from the fuel storage unit (4) to a fuel electrode (7) of the membrane electrode assembly (12). The membrane electrode assembly (12) has a gas vent hole (17) provided in a manner to penetrate through at least an electrolyte membrane (11) to let a gas component generated on a side of the fuel electrode (7) escape to a side of an air electrode (10).Type: ApplicationFiled: February 25, 2008Publication date: April 8, 2010Inventors: Hideyuki Oozu, Yukinori Akamoto, Yuuichi Sato, Genta Oomichi, Hirofumi Kan, Daisuke Watanabe, Nobuyasu Negishi, Yuichi Yoshida, Asako Sato
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Publication number: 20090263688Abstract: A fuel cell (10) has a fuel electrode, an air electrode, an electrolyte film (15) held between the fuel electrode and the air electrode, a liquid fuel tank (21) for containing liquid fuel, and a gas-liquid separation film (22) provided between the liquid fuel tank (21) and the fuel electrode. The gas-liquid separation film (22) exchanges heat between water vapor diffused from the fuel cell and the liquid fuel (F) and allows a vaporized component of the liquid fuel (F) to pass to the fuel electrode side.Type: ApplicationFiled: October 20, 2006Publication date: October 22, 2009Inventors: Akira Yajima, Yukinori Akamoto, Yuuichi Sato, Nobuyasu Negishi
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Publication number: 20090230944Abstract: An electronic device is provided with an electronic device main unit, a power supply unit which has a power generator having a fuel cell unit, and supplies electric power to the main unit, and a switching unit which is connected between the main unit and the power supply unit, and controls turning on and off of the electric power supplied from the power generator to the main unit. The electronic device is provided with a power supply control signal detection unit to detect an external power supply control signal, and a control unit to control turning on and off of the power supply with the switching unit by detection of the power supply control signal with the power supply control signal detection unit.Type: ApplicationFiled: May 26, 2009Publication date: September 17, 2009Inventors: Michiyuki Kitamoto, Kiyoshi Senoue, Hidenori Suzuki, Yukinori Akamoto, Kenichi Takahashi, Yoshie Ozeki, Takashi Shimoyamada, Hideaki Yasui, Hiroyuki Hasebe, Koichi Kawamura
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Publication number: 20090208779Abstract: In electronic equipment using a fuel cell as a power source, an antenna and a fuel cell, which are provided in a lower case of a main body receiving electronic parts, are arranged at a given distance from each other. An acceptable communication state can be established in the electronic equipment.Type: ApplicationFiled: February 13, 2009Publication date: August 20, 2009Inventors: Yoshie OZEKI, Hiroyuki Hasebe, Hideyuki Oozu, Yukinori Akamoto, Takashi Shimoyamada, Hideaki Yasui, Kenichi Takahashi, Nobuyasu Negishi, Kiyoshi Senoue, Koichi Kawamura
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Publication number: 20090191441Abstract: The fuel cell includes a membrane electrode assembly including a cathode catalyst layer, an anode catalyst layer and a proton conducting film provided between the cathode catalyst layer and the anode catalyst layer, a cathode conductive layer electrically connected to the cathode catalyst layer, an anode conductive layer electrically connected to the anode catalyst layer, a liquid fuel storage chamber which contains a liquid fuel, a gas-liquid separation film which selectively transmit a gasified component of the liquid fuel from the liquid fuel storage chamber to the anode catalyst layer, and a gasified fuel storage chamber formed at a section between the gas-liquid separation film and the anode conductive layer, and the distance L1 from the gas-liquid separation film to the anode conductive layer is set to 0 mm or more but 2 mm or less.Type: ApplicationFiled: February 24, 2009Publication date: July 30, 2009Inventors: Yuichi YOSHIDA, Nobuyasu Negishi, Hideyuki Oozu, Akira Yajima, Yukinori Akamoto
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Publication number: 20090085410Abstract: A PDA, which functions as an electronic unit, includes power supply which includes a fuel cell unit and an auxiliary power supply which is charged by an output of the fuel cell unit. A non-use state of the PDA is detected by non-use detection unit. Upon detection of the non-use state by the non-use detection unit, the output from the fuel cell unit is stopped and an output of the auxiliary power supply is shut off.Type: ApplicationFiled: September 23, 2008Publication date: April 2, 2009Inventors: Hidenori SUZUKI, Kiyoshi Senoue, Makoto Miyahara, Kenichi Takahashi, Michiyuki Kitamoto, Yukinori Akamoto, Yoshie Ozeki, Takashi Shimoyamada, Hideaki Yasui, Hiroyuki Hasebe, Koichi Kawamura
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Publication number: 20090042090Abstract: The present invention provides a fuel cell comprising: a cathode catalyst layer 2; an anode catalyst layer 3; a proton conductive membrane 6 disposed between the cathode catalyst layer 2 and the anode catalyst layer 3; a liquid fuel tank 9 for storing a liquid fuel L; a fuel vaporizing layer 10 for supplying a vaporized component of the liquid fuel L to the anode catalyst layer 3; a surface layer 15 having an air intake port 14 for supplying an air to the cathode catalyst layer 2; and a moisture retention plate 13A, disposed between the surface layer 15 and the cathode catalyst layer 2, for preventing water generated at the cathode catalyst layer from being evaporated, wherein the moisture retention plate is composed of a laminated body comprising at least two kind of porous members 13a and 13b each having different moisture permeability (moisture retention property).Type: ApplicationFiled: September 25, 2006Publication date: February 12, 2009Inventors: Nobuyasu Negishi, Jun Momma, Yumiko Takizawa, Yukinori Akamoto, Yuuichi Sato, Genta Oomichi
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Patent number: 6998821Abstract: An uninterruptible power supply comprises a power supply unit for generating DC power at a predetermined voltage from AC power supplied from the outside to supply the DC power to an electronic device, and a rechargeable battery unit including rechargeable battery cells for storing the power supplied thereto from the power supply unit for supplying the electronic device with the power stored in the rechargeable battery upon service interruption of the AC power. Particularly, the rechargeable battery unit comprises a battery state monitoring unit for monitoring a state of the rechargeable battery cells, and communicating means for notifying the electronic device of information indicative of the state of the rechargeable battery detected by the battery state monitoring unit, thereby securely guaranteeing the operation of the electronic device upon power failure, and sufficiently improve the operational reliability of the entire system.Type: GrantFiled: June 23, 2004Date of Patent: February 14, 2006Assignee: Toshiba Battery Co., Ltd.Inventors: Hirotaka Sakai, Hideki Miyamoto, Yasushi Mori, Yukinori Akamoto, Nobuo Shiojima
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Publication number: 20040232885Abstract: An uninterruptible power supply comprises a power supply unit for generating DC power at a predetermined voltage from AC power supplied from the outside to supply the DC power to an electronic device, and a rechargeable battery unit including rechargeable battery cells for storing the power supplied thereto from the power supply unit for supplying the electronic device with the power stored in the rechargeable battery upon service interruption of the AC power. Particularly, the rechargeable battery unit comprises a battery state monitoring unit for monitoring a state of the rechargeable battery cells, and communicating means for notifying the electronic device of information indicative of the state of the rechargeable battery detected by the battery state monitoring unit, thereby securely guaranteeing the operation of the electronic device upon power failure, and sufficiently improve the operational reliability of the entire system.Type: ApplicationFiled: June 23, 2004Publication date: November 25, 2004Applicant: TOSHIBA BATTERY CO., LTD.Inventors: Hirotaka Sakai, Hideki Miyamoto, Yasushi Mori, Yukinori Akamoto, Nobuo Shiojima
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Patent number: 6784641Abstract: An uninterruptible power supply includes a power supply unit for generating DC power at a predetermined voltage from AC power supplied from the outside to supply the DC power to an electronic device, and a rechargeable battery unit including rechargeable battery cells for storing the power supplied thereto from the power supply unit for supplying the electronic device with the power stored in the rechargeable battery upon service interruption of the AC power. The rechargeable battery unit includes a battery state monitoring unit for monitoring a state of the rechargeable battery cells and a communicating unit for notifying the electronic device of information indicative of the state of the rechargeable battery detected by the battery state monitoring unit. The rechargeable battery cells include nickel-metal hydride rechargeable batteries.Type: GrantFiled: September 19, 2001Date of Patent: August 31, 2004Assignee: Toshiba Battery Co., Ltd.Inventors: Hirotaka Sakai, Hideki Miyamoto, Yasushi Mori, Yukinori Akamoto, Nobuo Shiojima
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Patent number: 6428925Abstract: A battery pack having a plurality of battery cells stored side by side in a case. The case, in particular, includes a bottomed trough and a lid, the trough having a space as a cell storage portion defined between inner and outer wall portions paired to form a loop and a space as a hollow surrounded by the inner wall portion and penetrating the trough from top to bottom, the lid closing a top opening of the cell storage portion. The battery cells are arranged in a loop along the inner and outer wall portions, whereby a rise and variation in their temperature can be restrained.Type: GrantFiled: March 10, 2000Date of Patent: August 6, 2002Assignee: Toshiba Battery Co., Ltd.Inventors: Kazuta Takeno, Yukinori Akamoto, Haruhiko Tanaka, Kazumi Sato, Kiyoshi Ishitsuka, Hiroshi Kanasaki
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Publication number: 20020033692Abstract: An uninterruptible power supply comprises a power supply unit for generating DC power at a predetermined voltage from AC power supplied from the outside to supply the DC power to an electronic device, and a rechargeable battery unit including rechargeable battery cells for storing the power supplied thereto from the power supply unit for supplying the electronic device with the power. stored in the rechargeable battery upon service interruption of the AC power. Particularly, the rechargeable battery unit comprises a battery state monitoring unit for monitoring a state of the rechargeable battery cells, and communicating means for notifying the electronic device of information indicative of the state of the rechargeable battery detected by the battery state monitoring unit, thereby securely guaranteeing the operation of the electronic device upon power failure, and sufficiently improve the operational reliability of the entire system.Type: ApplicationFiled: September 19, 2001Publication date: March 21, 2002Applicant: TOSHIBA BATTERY CO., LTD.Inventors: Hirotaka Sakai, Hideki Miyamoto, Yasushi Mori, Yukinori Akamoto, Nobuo Shiojima