Patents by Inventor Takaki Nakagawa
Takaki Nakagawa 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: 7488550Abstract: A first seal member is provided integrally on a surface of a first metal separator. The first seal member includes a base portion provided integrally on the first metal separator, a columnar portion protruding from the base portion, and a curved edge portion provided on the columnar portion. The curved edge portion has a predetermined radius of curvature.Type: GrantFiled: December 22, 2003Date of Patent: February 10, 2009Assignee: Honda Motor Co., LtdInventors: Hiroyuki Tanaka, Tadashi Nishiyama, Daisuke Okonogi, Takaki Nakagawa
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Publication number: 20080241628Abstract: An object of the present invention is to provide a membrane-electrode assembly for solid polymer electrolyte fuel cells, which can impart high electrical properties by increasing the introduction amount of the sulfonic acid group, has excellent swell suppression effect even under the humidified condition of high-temperature, and which has excellent electrical properties even under the condition of high-temperature and low-humidity. By using sulfonated polyarylene having specific constitutional units as a proton conductive membrane, a membrane-electrode assembly for solid polymer electrolyte fuel cells can be provided which has excellent swell suppression effect even under the humidified condition of high-temperature, and which has excellent proton conductivity even under the condition of high-temperature and low-humidity.Type: ApplicationFiled: March 27, 2008Publication date: October 2, 2008Applicant: HONDA MOTOR CO. LTD.Inventors: Takaki Nakagawa, Nagayuki Kanaoka, Ryohei Ishimaru
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Patent number: 7351490Abstract: A first seal structure includes a seal joint and seal members connected to the seal joint. An interior angle at the seal joint defined by central lines of the seal members is in a range of 40° to 90°. The seal joint includes a curved portion having a predetermined radius of curvature R for connecting the seal members.Type: GrantFiled: January 29, 2004Date of Patent: April 1, 2008Assignee: Honda Motor Co., Ltd.Inventors: Hiroyuki Tanaka, Tadashi Nishiyama, Takaki Nakagawa
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Patent number: 7344794Abstract: A seal member is formed integrally on surfaces of a metal separator of a fuel cell. The seal members include an outer seal provided near the outer edge of the separator, and an inner seal spaced inwardly from the outer seal by a predetermined distance. When a load is applied to the outer seal and the inner seal in a stacking direction, the outer seal and the inner seal are deformed substantially equally in the stacking direction to the same extent.Type: GrantFiled: July 1, 2004Date of Patent: March 18, 2008Assignee: Honda Motor Co., Ltd.Inventors: Hiroyuki Tanaka, Narutoshi Sugita, Tadashi Nishiyama, Takaki Nakagawa
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Patent number: 7226688Abstract: A fuel gas inlet is provided at an outer circumferential edge portion of a second separator. First fuel gas flow passage grooves for supplying a fuel gas to an anode electrode are formed on a side of a surface of the second separator. First fuel gas connecting flow passages, which make communication between the fuel gas inlet and the first fuel gas flow passage grooves, include flow passage grooves which are provided on a side of a surface, and through-holes which penetrate through the second separator to make communication with the first fuel gas flow passage grooves. Accordingly, excellent sealing performance is ensured with a simple structure, and it is possible to realize a thin-walled fuel cell.Type: GrantFiled: October 3, 2003Date of Patent: June 5, 2007Assignee: Honda Motor Co., Ltd.Inventors: Yosuke Fujii, Noriaki Osao, Yoshinori Wariishi, Takaki Nakagawa, Hiroshi Shinkai, Katsumi Hayashi
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Patent number: 7220511Abstract: A fuel cell includes a membrane electrode assembly and first and second metal separators sandwiching the membrane electrode assembly. A first cell voltage terminal for detecting a voltage generated in the membrane electrode assembly is formed integrally with an outer region of the first metal separator. The first cell voltage terminal extends outwardly from the first metal separator. A first seal member covers the outer region of the first metal separator, and includes a first extension seal which covers the first cell voltage terminal to a position near a tip end of the first cell voltage terminal.Type: GrantFiled: December 28, 2004Date of Patent: May 22, 2007Assignee: Honda Motor Co., Ltd.Inventors: Takaki Nakagawa, Hiroyuki Tanaka, Takashi Kosaka, Takahiro Yoshida, Narutoshi Sugita, Shuhei Goto, Seiji Sugiura, Tadashi Nishiyama
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Patent number: 7090941Abstract: A cell assembly is formed by stacking a first cell and a second cell. In the cell assembly, oxygen-containing gas flow passages are connected in series by an intermediate oxygen-containing gas flow passage, and fuel gas flow passages are connected in series by an intermediate fuel gas flow passage. An additional oxygen-containing gas is supplied to an oxygen-containing gas passage which includes the intermediate oxygen-containing gas flow passage. An additional fuel gas is supplied to a fuel gas passage which includes the intermediate fuel gas flow passage.Type: GrantFiled: September 13, 2002Date of Patent: August 15, 2006Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Ichiro Baba, Yosuke Fujii, Ken Takahashi, Daisuke Wachi, Hiromichi Yoshida, Takaki Nakagawa, Yoshinori Wariishi, Masaharu Suzuki, Seiji Sugiura, Narutoshi Sugita, Hideaki Kikuchi
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Patent number: 7018733Abstract: A unit cell has a membrane electrode assembly. The membrane electrode assembly includes a cathode, and an anode, and a solid polymer electrolyte fuel cell interposed between the cathode and the anode. The membrane electrode assembly is interposed between a first separator and a second separator. A thin cooling plate is interposed between the second separator and another first separator. A first coolant flow passage and a second coolant flow passage are formed on both surfaces of the cooling plate. The coolant flows along one surface of the cooling plate, and turns back at an end of the cooling plate to flow along the other surface of the cooling plate.Type: GrantFiled: October 9, 2002Date of Patent: March 28, 2006Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Seiji Sugiura, Masaharu Suzuki, Tetsuya Koido, Yoshinori Wariishi, Yosuke Fujii, Takaki Nakagawa
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Publication number: 20050208364Abstract: A first seal member is formed integrally on both surfaces of a first metal plate. The first seal member is integrally formed on a cooling surface of the first metal plate, except a region corresponding to a reaction surface facing an electrode reaction surface, and except regions of inlet buffers and outlet buffers. The first seal member has an expansion. The position of an end surface of the expansion substantially matches the position of a wall surface of the outermost groove of a coolant flow field to prevent the flow of a coolant around the electrode reaction surface.Type: ApplicationFiled: March 16, 2005Publication date: September 22, 2005Applicant: Honda Motor Co., Ltd.Inventors: Takaki Nakagawa, Takahiro Yoshida, Hiroyuki Tanaka, Takashi Kosaka
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Publication number: 20050153192Abstract: A fuel cell includes a membrane electrode assembly and first and second metal separators sandwiching the membrane electrode assembly. A first cell voltage terminal for detecting a voltage generated in the membrane electrode assembly is formed integrally with an outer region of the first metal separator. The first cell voltage terminal extends outwardly from the first metal separator. A first seal member covers the outer region of the first metal separator, and includes a first extension seal which covers the first cell voltage terminal to a position near a tip end of the first cell voltage terminal.Type: ApplicationFiled: December 28, 2004Publication date: July 14, 2005Inventors: Takaki Nakagawa, Hiroyuki Tanaka, Takashi Kosaka, Takahiro Yoshida, Narutoshi Sugita, Shuhei Goto, Seiji Sugiura, Tadashi Nishiyama
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Publication number: 20050079400Abstract: A seal member is formed integrally on surfaces of a metal separator of a fuel cell. The seal member includes an outer seal and an inner seal provided on a surface of the metal separator. A plurality of closure seals are formed integrally with an inner edge of the inner seal. The closure seals close a space between the inner seal and a protrusion forming a fuel gas flow field.Type: ApplicationFiled: August 27, 2004Publication date: April 14, 2005Applicant: Honda Motor Co., Ltd.Inventors: Seiji Sugiura, Mikihiko Kimura, Ryugo Suzuki, Masahiro Mohri, Takaki Nakagawa, Hiroshi Morikawa, Hiromichi Yoshida, Takeo Abe
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Publication number: 20050031934Abstract: A seal member is formed integrally on surfaces of a metal separator of a fuel cell. The seal members include an outer seal provided near the outer edge of the separator, and an inner seal spaced inwardly from the outer seal by a predetermined distance. When a load is applied to the outer seal and the inner seal in a stacking direction, the outer seal and the inner seal are deformed substantially equally in the stacking direction to the same extent.Type: ApplicationFiled: July 1, 2004Publication date: February 10, 2005Applicant: Honda Motor Co., Ltd.Inventors: Hiroyuki Tanaka, Narutoshi Sugita, Tadashi Nishiyama, Takaki Nakagawa
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Publication number: 20040219410Abstract: Flow guides forming an inlet channel are formed on a surface of a metal separator of a fuel cell. The flow guides overlap a section of an outer seal provided on the other surface of the metal separator. When a load is applied to the flow guides and the overlapping section in a stacking direction of the fuel cell, the flow guides and the overlapping section are deformed substantially equally in the stacking direction to the same extent. The line pressure of the flow guides and the line pressure of the overlapping section are substantially the same. The seal length L1 of the flow guides and the seal length L2 of the overlapping section are substantially the same.Type: ApplicationFiled: April 30, 2004Publication date: November 4, 2004Applicant: Honda Motor Co., Ltd.Inventors: Hiroyuki Tanaka, Narutoshi Sugita, Tadashi Nishiyama, Takaki Nakagawa
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Publication number: 20040185322Abstract: A first seal structure includes a seal joint and seal members connected to the seal joint. An interior angle at the seal joint defined by central lines of the seal members is in a range of 40° to 90° . The seal joint includes a curved portion having a predetermined radius of curvature R for connecting the seal members.Type: ApplicationFiled: January 29, 2004Publication date: September 23, 2004Applicant: Honda Motor Co., Ltd.Inventors: Hiroyuki Tanaka, Tadashi Nishiyama, Takaki Nakagawa
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Publication number: 20040137304Abstract: A first seal member is provided integrally on a surface of a first metal separator. The first seal member includes a base portion provided integrally on the first metal separator, a columnar portion protruding from the base portion, and a curved edge portion provided on the columnar portion. The curved edge portion has a predetermined radius of curvature.Type: ApplicationFiled: December 22, 2003Publication date: July 15, 2004Applicant: Honda Motor Co., Ltd.Inventors: Hiroyuki Tanaka, Tadashi Nishiyama, Daisuke Okonogi, Takaki Nakagawa
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Publication number: 20040115512Abstract: A fuel gas inlet is provided at an outer circumferential edge portion of a second separator. First fuel gas flow passage grooves for supplying a fuel gas to an anode electrode are formed on a side of a surface of the second separator. First fuel gas connecting flow passages, which make communication between the fuel gas inlet and the first fuel gas flow passage grooves, include flow passage grooves which are provided on a side of a surface, and through-holes which penetrate through the second separator to make communication with the first fuel gas flow passage grooves. Accordingly, excellent sealing performance is ensured with a simple structure, and it is possible to realize a thin-walled fuel cell.Type: ApplicationFiled: October 3, 2003Publication date: June 17, 2004Applicant: Honda Motor Co., Ltd.Inventors: Yosuke Fujii, Noriaki Osao, Yoshinori Wariishi, Takaki Nakagawa, Hiroshi Shinkai, Katsumi Hayashi
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Patent number: 6686085Abstract: A fuel gas inlet is provided at an outer circumferential edge portion of a second separator. First fuel gas flow passage grooves for supplying a fuel gas to an anode electrode are formed on a side of a surface of the second separator. First fuel gas connecting flow passages, which make communication between the fuel gas inlet and the first fuel gas flow passage grooves, include flow passage lo grooves which are provided on a side of a surface, and through-holes which penetrate through the second separator to make communication with the first fuel gas flow passage grooves. Accordingly, excellent sealing performance is ensured with a simple structure, and it is possible to realize a thin-walled fuel cell.Type: GrantFiled: September 7, 2000Date of Patent: February 3, 2004Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Yosuke Fujii, Noriaki Osao, Yoshinori Wariishi, Takaki Nakagawa, Hiroshi Shinkai, Katsumi Hayashi
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Publication number: 20030068541Abstract: A unit cell has a membrane electrode assembly. The membrane electrode assembly includes a cathode, and an anode, and a solid polymer electrolyte fuel cell interposed between the cathode and the anode. The membrane electrode assembly is interposed between a first separator and a second separator. A thin cooling plate is interposed between the second separator and another first separator. A first coolant flow passage and a second coolant flow passage are formed on both surfaces of the cooling plate. The coolant flows along one surface of the cooling plate, and turns back at an end of the cooling plate to flow along the other surface of the cooling plate.Type: ApplicationFiled: October 9, 2002Publication date: April 10, 2003Applicant: Honda Giken Kogyo Kabushiki KaishaInventors: Seiji Sugiura, Masaharu Suzuki, Tetsuya Koido, Yoshinori Wariishi, Yosuke Fujii, Takaki Nakagawa
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Publication number: 20030054223Abstract: A cell assembly is formed by stacking a first cell and a second cell. In the cell assembly, oxygen-containing gas flow passages are connected in series by an intermediate oxygen-containing gas flow passage, and fuel gas flow passages are connected in series by an intermediate fuel gas flow passage. An additional oxygen-containing gas is supplied to an oxygen-containing gas passage which includes the intermediate oxygen-containing gas flow passage. An additional fuel gas is supplied to a fuel gas passage which includes the intermediate fuel gas flow passage.Type: ApplicationFiled: September 13, 2002Publication date: March 20, 2003Applicant: Honda Giken Kogyo Kabushiki KaishaInventors: Ichiro Baba, Yosuke Fujii, Ken Takahashi, Daisuke Wachi, Hiromichi Yoshida, Takaki Nakagawa, Yoshinori Wariishi, Masaharu Suzuki, Seiji Sugiura, Narutoshi Sugita, Hideaki Kikuchi