Patents by Inventor Hikaru Murakami
Hikaru Murakami 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: 7704623Abstract: A mold for a use of making a fuel cell separator comprises: a first flow path forming portion to form a cooling medium flowing path, or to form an oxidizing gas flowing path, or to form a fuel gas flowing path; and an injection gate to shoot out a forming material settled on the first flow path, and/or disposed at near place with the first flow path.Type: GrantFiled: October 28, 2008Date of Patent: April 27, 2010Assignee: Panasonic CorporationInventors: Hideo Ohara, Hikaru Murakami, Masaaki Miyoshi, Kazuhito Hatoh, Takeshi Tomizawa
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Publication number: 20090068526Abstract: A mold for a use of making a fuel cell separator comprises: a first flow path forming portion to form a cooling medium flowing path, or to form an oxidizing gas flowing path, or to form a fuel gas flowing path; and an injection gate to shoot out a forming material settled on the first flow path, and/or disposed at near place with the first flow path.Type: ApplicationFiled: October 28, 2008Publication date: March 12, 2009Applicant: PANASONIC CORPORATIONInventors: Hideo Ohara, Hikaru Murakami, Masaaki Miyoshi, Kazuhito Hatoh, Takeshi Tomizawa
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Patent number: 7501199Abstract: A mold for a use of making a fuel cell separator comprises: a first flow path forming portion to form a cooling medium flowing path, or to form an oxidizing gas flowing path, or to form a fuel gas flowing path; and an injection gate to shoot out a forming material settled on the first flow path, and/or disposed at near place with the first flow path.Type: GrantFiled: October 22, 2004Date of Patent: March 10, 2009Assignee: Panasonic CorporationInventors: Hideo Ohara, Hikaru Murakami, Masaaki Miyoshi, Kazuhito Hatoh, Takeshi Tomizawa
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Publication number: 20050089598Abstract: A mold for a use of making a fuel cell separator comprises: a first flow path forming portion to form a cooling medium flowing path, or to form an oxidizing gas flowing path, or to form a fuel gas flowing path; and an injection gate to shoot out a forming material settled on the first flow path, and/or disposed at near place with the first flow path.Type: ApplicationFiled: October 22, 2004Publication date: April 28, 2005Inventors: Hideo Ohara, Hikaru Murakami, Masaaki Miyoshi, Kazuhito Hatoh, Takeshi Tomizawa
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Patent number: 6840969Abstract: An electrolyte membrane-gasket assembly for a fuel cell, including a polymer electrolyte membrane and a gasket, made of a seal material, covering the peripheral portion of the electrolyte membrane, in which the electrolyte membrane has a sequence of a plurality of through-holes in the peripheral portion, and a portion of the gasket covering one surface of the electrolyte membrane and a portion covering the other surface are connected to each other through the through-holes of the electrolyte membrane. This assembly provides a polymer electrolyte fuel cell free from gas cross leakage caused by a detachment of the gasket from the polymer electrolyte membrane. It is preferable to further include catalyst layers carried on both surfaces of the polymer electrolyte membrane, respectively, and protective films covering, respectively, sections spanning from the peripheral portion of each of the catalyst layers to the peripheral portion of the polymer electrolyte membrane.Type: GrantFiled: January 30, 2002Date of Patent: January 11, 2005Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Susumu Kobayashi, Masato Hosaka, Kazuhito Hatoh, Hikaru Murakami, Mikio Takezawa, Takayuki Onishi
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Patent number: 6790552Abstract: A polymer electrolyte fuel cell in which neither cross leakage nor outward leakage occurs with the application of low clamping pressures. The polymer electrolyte fuel cell a membrane electrode assembly (MEA) including a polymer electrolyte membrane, a gasket covering the periphery of the electrolyte membrane, and an anode and cathode attached to the electrolyte membrane; and conductive separator plates sandwiching the MEA therebetween. The gasket has seal ribs surrounding each of the manifold apertures, the anode and the cathode, as well as seal ribs formed on both sides of each of gas passages connecting the fuel gas manifold apertures with the anode and gas passages connecting the oxidant gas manifold apertures with the cathode. These seal ribs, except for in the gas passages, are pressed against the separator plates by clamping pressure of the cell stack to form gas sealing sections.Type: GrantFiled: October 15, 2002Date of Patent: September 14, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Susumu Kobayashi, Masato Hosaka, Kazuhito Hatoh, Hikaru Murakami, Mikio Takezawa, Takayuki Onishi
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Publication number: 20030091885Abstract: The present invention provides an electrolyte membrane-gasket assembly for a fuel cell, including a polymer electrolyte membrane and a gasket, made of a seal material, covering the peripheral portion of the electrolyte membrane, in which the electrolyte membrane has a sequence of a plurality of through-holes in the peripheral portion, and a portion of the gasket covering one surface of the electrolyte membrane and a portion covering the other surface are connected to each other through the through-holes of the electrolyte membrane. This assembly provides a polymer electrolyte fuel cell that is free from gas cross leakage caused by a detachment of the gasket from the polymer electrolyte membrane. It is preferable to further include catalyst layers carried on both surfaces of the polymer electrolyte membrane, respectively, and protective films covering, respectively, sections spanning from the peripheral portion of each of the catalyst layers to the peripheral portion of the polymer electrolyte membrane.Type: ApplicationFiled: October 1, 2002Publication date: May 15, 2003Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Susumu Kobayashi, Masato Hosaka, Kazuhito Hatoh, Hikaru Murakami, Mikio Takezawa, Takayuki Onishi
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Publication number: 20030087142Abstract: The present invention provides a polymer electrolyte fuel cell in which neither cross leakage nor outward leakage occurs with the application of low clamping pressures. The polymer electrolyte fuel cell comprises a unit cell, the unit cell comprising: a membrane electrode assembly (MEA) comprising a polymer electrolyte membrane, a gasket covering the periphery of the electrolyte membrane, an anode and a cathode attached to the electrolyte membrane; and conductive separator plates sandwiching the MEA therebetween. The gasket and the separator plates have a pair of manifold apertures for each of fuel gas, oxidant gas and cooling water. The gasket comprises dummy ribs surrounding each of the manifold apertures, and the separator plates have grooves into which each of the dummy ribs is fitted loosely such that there is a clearance therebetween.Type: ApplicationFiled: October 15, 2002Publication date: May 8, 2003Inventors: Susumu Kobayashi, Masato Hosaka, Kazuhito Hatoh, Hikaru Murakami, Mikio Takezawa, Takayuki Onishi
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Publication number: 20020197523Abstract: A method of producing a fuel cell comprising the steps of: (A) molding a separator having a gas flow channel or a cooling water flow channel by injection molding process having a step of injecting a mixture comprising one or more conductive inorganic materials and one or more resins into a mold; (B) producing an assembly comprising an electrolyte and a pair of electrodes sandwiching the electrolyte; and (C) combining the separator with the assembly to produce a fuel cell.Type: ApplicationFiled: June 11, 2002Publication date: December 26, 2002Applicant: Matsushita Electric Industrial Co., LtdInventors: Hideo Ohara, Kazuhito Hatoh, Katsumi Tomita, Nobuhiro Hase, Hiroki Kusakabe, Tatsuto Yamazaki, Masayo Sugou, Shinsuke Takeguchi, Susumu Kobayashi, Hikaru Murakami, Mikio Takezawa, Hiroshi Kobayashi, Takayuki Onishi, Hiroaki Matsuoka
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Patent number: D585826Type: GrantFiled: November 17, 2004Date of Patent: February 3, 2009Assignee: Panasonic CorporationInventors: Hideo Ohara, Masaaki Miyoshi, Hikaru Murakami, Kazuhito Hatoh
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Patent number: D605593Type: GrantFiled: June 9, 2008Date of Patent: December 8, 2009Assignee: Panasonic CorporationInventors: Hideo Ohara, Masaaki Miyoshi, Hikaru Murakami, Kazuhito Hatoh
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Patent number: D605594Type: GrantFiled: June 9, 2008Date of Patent: December 8, 2009Assignee: Panasonic CorporationInventors: Hideo Ohara, Masaaki Miyoshi, Hikaru Murakami, Kazuhito Hatoh
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Patent number: D616819Type: GrantFiled: June 9, 2008Date of Patent: June 1, 2010Assignee: Panasonic CorporationInventors: Hideo Ohara, Masaaki Miyoshi, Hikaru Murakami, Kazuhito Hatoh