Patents by Inventor Yosuke Fujii
Yosuke Fujii 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).
-
Patent number: 6815107Abstract: In order to improve detecting accuracy in a gas leak detection for a fuel cell, in a gas leak detection method for a fuel cell having a solid polymer electrolyte membrane sandwiched by an anode and a cathode, an output voltage is measured in an activated over-potential region in a state in which the pressure of fuel gas which is supplied to the anode is maintained higher than the pressure of gas which is supplied to the cathode, and a gas leak is determined to exist when the output voltage is lower than a predetermined pressure value.Type: GrantFiled: July 26, 2002Date of Patent: November 9, 2004Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Shigeru Inai, Katsumi Hayashi, Yosuke Fujii, Minoru Koshinuma
-
Publication number: 20040157099Abstract: A fuel cell stack includes a cell assembly formed by stacking a plurality of fuel cells in a stacking direction. Terminal plates are provided outside opposite ends of the cell assembly in the stacking direction. An electrically conductive first heat insulation plate is interposed between one end of the cell assembly and the terminal plate, and an electrically conductive second heat insulation plate is interposed between the other end of the cell assembly and the terminal plate. The first and second heat insulation plates are metal corrugated plates. Heat insulation air chambers are defined between the first and second heat insulation plates and the cell assembly.Type: ApplicationFiled: October 28, 2003Publication date: August 12, 2004Applicant: Honda Motor Co., Ltd.Inventors: Hideo Kato, Katsumi Hayashi, Yosuke Fujii, Masahiko Sato, Hideo Okamoto
-
Patent number: 6771041Abstract: A cell voltage measuring device for a fuel cell includes a terminal member to be connected to a separator of the fuel cell, the terminal member including a first end and a second end, and a voltage measuring unit which measures cell voltage of the fuel cell through the terminal member. The first end of the terminal member is fixed to the voltage measuring unit, and the second end of the terminal member makes contact with the separator, and an elastic portion is provided between the first end and the second end of the terminal member. The cell voltage measuring device may further includes a holder member which is capable of maintaining a state in which the second end of the terminal member is separated from each other, and the holder member is movably attached in a stacking direction of the separator with respect to the voltage measuring unit.Type: GrantFiled: September 6, 2002Date of Patent: August 3, 2004Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Masahiko Sato, Hideaki Kikuchi, Toshiaki Ariyoshi, Yosuke Fujii
-
Publication number: 20040121215Abstract: A fuel cell includes a membrane electrode assembly and first and second metal separators for sandwiching the membrane electrode assembly. In the membrane electrode assembly, a surface area of a gas diffusion layer is larger than a surface area of a gas diffusion layer. A seal member is provided at a position corresponding to an outer marginal region of the gas diffusion layer. The seal member includes a main seal inserted between a solid polymer electrolyte membrane and the first metal separator, and an a flow field wall inserted between the gas diffusion layer and the first metal separator for defining a part of an oxygen-containing gas flow field.Type: ApplicationFiled: September 4, 2003Publication date: June 24, 2004Applicant: Honda Giken Kogyo Kabushiki KaishaInventors: Yosuke Fujii, Seiji Sugiura, Narutoshi Sugita
-
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
-
Publication number: 20040115509Abstract: A fuel cell includes a membrane electrode assembly and first and second separators for sandwiching the membrane electrode assembly. A serpentine oxygen-containing gas flow field is formed on a surface of the first separator. A seal member is provided around the oxygen-containing gas flow field, i.e., around the anode. Filling seals are provided in a clearance between the seal member and the cathode at positions where the leakage of an oxygen-containing gas is likely to occur.Type: ApplicationFiled: September 25, 2003Publication date: June 17, 2004Applicant: Honda Giken Kogyo Kabushiki KaishaInventors: Hiromichi Yoshida, Daisuke Wachi, Masahiro Mohri, Yosuke Fujii, Narutoshi Sugita, Shuhei Goto
-
Publication number: 20040095127Abstract: A fuel cell system includes a fuel cell. A current density measuring apparatus is provided on a cathode side of the fuel cell. The current density measuring apparatus includes a plurality of Hall elements provided at positions corresponding to measuring positions in an electrode surface. Each of the Hall element is attached to a ferrite core fitted to a pole of a sensor mounting plate. The ferrite core and the Hall element attached to the pole make up a current sensor.Type: ApplicationFiled: October 27, 2003Publication date: May 20, 2004Inventors: Masahiro Mohri, Yosuke Fujii, Katsumi Hayashi, Toshiya Wakahoi
-
Publication number: 20040038112Abstract: A fuel cell includes a membrane electrode assembly, and a first and second separators for sandwiching the membrane electrode assembly. The first separator has an oxygen-containing gas flow passage for allowing an oxygen-containing gas in a serpentine pattern to flow horizontally back and forth, and flow downwardly. Partition areas are provided along the oxygen-containing gas flow passage in the serpentine pattern. The partition areas are formed by partially cutting out a gas diffusion layer. Insulating seals for preventing leakage of the oxygen-containing gas are provided in the partition areas.Type: ApplicationFiled: June 4, 2003Publication date: February 26, 2004Applicant: Honda Giken Kogyo Kabushiki KaishaInventors: Masahiro Mohri, Yosuke Fujii, Hiromichi Yoshida, Daisuke Wachi, Shuhei Goto
-
Publication number: 20040038103Abstract: A cell assembly is formed by stacking a first fuel cell and a second fuel cell together. The first fuel cell has a first membrane electrode assembly, and the second fuel cell has a second membrane electrode assembly. In the cell assembly, oxygen-containing gas flow fields of the first and second separators are connected in series, and fuel gas flow fields of the first and second separators are connected in series. Coolant flow fields are formed on opposite sides of the cell assembly, respectively, for supplying a coolant straight in one direction through the coolant flow fields.Type: ApplicationFiled: August 15, 2003Publication date: February 26, 2004Applicant: Honda Giken Kogyo Kabushiki KaishaInventors: Yoshinori Wariishi, Hideaki Kikuchi, Yuichiro Kosaka, Yosuke Fujii, Masahiro Ise, Seiji Sugiura
-
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
-
Patent number: 6674264Abstract: A cell voltage detector for fuel cell comprising terminals adapted to be brought into abutment with output terminals of separators for a stack, a voltage detecting unit for detecting the cell voltage of the stack through the terminals, a terminal holder for holding one end of the respective terminals and permitting the abutment of the terminals with the output terminals of the separators via a terminal opening opened in a fuel cell cover for encompassing the stack, the terminal holder having a leg portion adapted to be brought into abutment with the periphery of the terminal opening and a terminal cover retained onto the fuel cell cover, so that the terminal cover is brought into abutment with a head portion of the terminal holder on an inner surface thereof and covers the periphery of the terminal opening.Type: GrantFiled: September 10, 2002Date of Patent: January 6, 2004Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Masahiko Sato, Hideaki Kikuchi, Toshiaki Ariyoshi, Yosuke Fujii
-
Publication number: 20030194591Abstract: A fuel gas passage, an oxygen-containing gas passage, and a coolant passage extend through a fuel cell stack. Each of the fuel gas passage and the oxygen-containing gas passage is formed by serially connecting passages between the first through third fuel cell modules. The fuel gas flows through the fuel gas passage, and the oxygen-containing gas flows through the oxygen-containing gas passage from the first fuel cell module toward the third fuel cell module. The coolant passage is formed by serially connecting passages between the first through third fuel modules. The coolant flows through the coolant passage from the third fuel cell module toward the first fuel cell module. The direction of the flow of the coolant is opposite to the direction of the flows of the fuel gas and the oxygen-containing gas.Type: ApplicationFiled: March 26, 2003Publication date: October 16, 2003Applicant: Honda Giken Kogyo Kabushiki KaishaInventors: Yoshinori Wariishi, Hideaki Kikuchi, Masaharu Suzuki, Masaru Oda, Yosuke Fujii, Ichiro Baba
-
Publication number: 20030153753Abstract: (2R)-1-[3,5-bis(trifluoromethyl)benzoyl]-4-[2-[(2S)-2-(methoxymethyl)morpholino]ethyl]-2-(3-hydroxy-4-methylbenzyl)piperazine dihydrochloride is obtained by debenzylating (2R)-4-benzyl-1-[3,5-bis(trifluoromethyl)-benzoyl]-2-(3-hydroxy-4-methylbenzyl)piperazine, then N-alkylating and converting to hydrochloride.Type: ApplicationFiled: December 13, 2002Publication date: August 14, 2003Inventors: Keiichi Koga, Ryoki Orii, Yosuke Fujii, Shunsuke Goto, Satoshi Hirabayashi
-
Publication number: 20030114488Abstract: The present invention relates to processes for the preparation of &bgr;-alanine derivative shown by following formula (I): 1Type: ApplicationFiled: December 13, 2002Publication date: June 19, 2003Applicant: Fujisawa Pharmaceutical Co. Ltd.Inventors: Mitsuru Ohkubo, Satoru Kuroda, Hideko Nakamura, Hisashi Takasugi, Yosuke Fujii, Keiichi Koga, Eiki Oikawa, Ryoki Orii, Shunsuke Goto
-
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
-
Publication number: 20030064261Abstract: There is provided a fuel cell stacking body that allows a connector unit to be used even when the thickness of the fuel cells has been made thinner. A fuel cell stacking body is provided with stacked fuel cells that each have a membrane electrode assembly and separators that sandwich this membrane electrode assembly. The fuel cells generate electricity when fuel gas and oxidizer gas are supplied. The separators of the fuel cells are provided with terminals that enable voltage to be measured by being connected to connectors that are connected an external voltage measuring apparatus. One of the voltage measuring sections is formed at a different position, with respect to the stacking direction, from the voltage measuring section that is adjacent in the stacking direction. The spacing between terminals that are at the same position with respect to the stacking direction is kept at a distance that allows a connector unit formed by grouping together a plurality of connectors to be inserted.Type: ApplicationFiled: September 26, 2002Publication date: April 3, 2003Applicant: HONDA GIKEN KOGYO KABUSHIKI KAISHAInventors: Hideaki Kikuchi, Masahiko Sato, Toshiaki Ariyoshi, Yosuke Fujii, Daisuke Wachi
-
Patent number: 6538007Abstract: The trihydrates of &bgr;-alanine of the formula Are disclosed. Also method of antogonizing glycoprotein IIb/IIIa activity using these compounds is also disclosed.Type: GrantFiled: April 12, 2001Date of Patent: March 25, 2003Assignee: Fujisawa Pharmaceutical Co., Ltd.Inventors: Mitsuru Ohkubo, Satoru Kuroda, Hideko Nakamura, Hisashi Takasugi, Yosuke Fujii, Keiichi Koga, Eiki Oikawa, Ryoki Orii, Shunsuke Goto
-
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
-
Publication number: 20030054224Abstract: An intermediate plate is interposed between first and second sub-stacks. The intermediate plate has, defined in a surface thereof, an oxygen-containing gas mixing passage interconnecting an oxygen-containing gas outlet in the first sub-stack which is located upstream and an oxygen-containing gas inlet in the second sub-stack which is located downstream. In the first and second sub-stacks, an oxygen-containing gas is supplied from the oxygen-containing gas inlet and discharged to the oxygen-containing gas outlet at all times.Type: ApplicationFiled: September 17, 2002Publication date: March 20, 2003Applicant: Honda Giken Kogyo Kabushiki KaishaInventors: Yoshinori Wariishi, Masaharu Suzuki, Hideaki Kikuchi, Narutoshi Sugita, Ichiro Baba, Ken Takahashi, Seiji Sugiura, Yosuke Fujii, Daisuke Wachi
-
Publication number: 20030049515Abstract: A cell assembly has reactant gas passages connected in series in first and second unit cells, and oxygen-containing gas inlets, intermediate oxygen-containing gas inlets, oxygen-containing gas outlets, intermediate oxygen-containing gas outlets which are defined in the first and second unit cells. The oxygen-containing gas inlets and the intermediate oxygen-containing gas inlets are disposed upwardly of the oxygen-containing gas outlets and the intermediate oxygen-containing gas outlets. The oxygen-containing gas outlets and the intermediate oxygen-containing gas outlets are disposed at least partly below electric energy generating surfaces of the first and second unit cells.Type: ApplicationFiled: September 12, 2002Publication date: March 13, 2003Applicant: Honda Giken Kogyo Kabushiki KaishaInventors: Yoshinori Wariishi, Narutoshi Sugita, Masaharu Suzuki, Seiji Sugiura, Daisuke Wachi, Yosuke Fujii