Patents by Inventor Masahiro Seido
Masahiro Seido 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: 8227089Abstract: A method of producing a Nb3Sn superconducting wire rod includes forming a wire rod comprising Nb, Sn and Cu, and having a mole ratio of the Sn expressed as ax+b(1?x), where 0.25?x?0.8, 0.3?a?0.4 and 0.02?b?0.1, and x and 1?x are prescribed as a mole ratio of the Nb and a mole ratio of the Cu, respectively, to a total of a mole number of the Nb and a mole number of the Cu, and heating the wire rod to produce Nb3Sn from the Sn and the Nb. By the heating of the wire rod, a Cu—Sn alloy is produced from the Sn and the Cu, concurrently with the Nb3Sn produced from the Sn and the Nb.Type: GrantFiled: December 20, 2010Date of Patent: July 24, 2012Assignee: Hitachi Cable, Ltd.Inventors: Katsumi Ohata, Masahiro Seido, Morio Kimura
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Patent number: 8182960Abstract: A metal separator for fuel cells formed with a metal plate and provided between cells accumulated, in which the metal plate is formed like trapezoidal irregularities to separate channels for a fuel gas from ones for an oxidant gas. Slope portions are formed after forming uniformly and thinly wall thickness of both upper and lower flat portions or either of the upper or the lower flat portion to 90% or less of that of the metal plate to be formed to obtain trapezoidal irregularities by forming flat portions which contact upper and lower cells and slope portions which interconnect the upper and the lower flat portions.Type: GrantFiled: September 17, 2008Date of Patent: May 22, 2012Assignee: Hitachi Cable, Ltd.Inventors: Masahiro Seido, Kazuhiko Nakagawa, Takaaki Sasaoka, Mineo Washima
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Patent number: 8039171Abstract: A current-collecting composite plate for a fuel cell configured with unit cells according to the present invention, which comprises: an insulator layer; and a plurality of pairs of conductor layers, the conductor layers being bonded to the insulator layer to be spaced apart from each other by a predetermined distance, each pair being used for adjacently disposed anode and cathode electrodes for a different one of the unit cells by sandwiching an electrolyte assembly therebetween. And, each conductor layer includes: a first conductor layer of a corrosion resistant metal treated with an electrically conductive surface treatment; a second conductor layer of a metal with low electrical resistivity; a through-hole penetrating the first conductor layer and the insulator layer; and a connecting portion formed of the second conductor layer for connecting the unit cells.Type: GrantFiled: October 2, 2008Date of Patent: October 18, 2011Assignee: Hitachi Cable, Ltd.Inventors: Masahiro Seido, Kazuhiko Nakagawa, Takaaki Sasaoka, Mineo Washima
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Publication number: 20110190139Abstract: A method of producing a Nb3Sn superconducting wire rod includes forming a wire rod comprising Nb, Sn and Cu, and having a mole ratio of the Sn expressed as ax+b(1?x), where 0.25?x?0.8, 0.3?a?0.4 and 0.02?b?0.1, and x and 1?x are prescribed as a mole ratio of the Nb and a mole ratio of the Cu, respectively, to a total of a mole number of the Nb and a mole number of the Cu, and heating the wire rod to produce Nb3Sn from the Sn and the Nb. By the heating of the wire rod, a Cu—Sn alloy is produced from the Sn and the Cu, concurrently with the Nb3Sn produced from the Sn and the Nb.Type: ApplicationFiled: December 20, 2010Publication date: August 4, 2011Applicant: HITACHI CABLE, LTD.Inventors: Katsumi OHATA, Masahiro SEIDO, Morio KIMURA
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Patent number: 7871737Abstract: A metal composite for fuel cells according to the present invention, which includes: a core of a metal; cladded layers of a corrosion resistant metal covering both surfaces of the core; and a through-hole formed through the core and cladded layers. The through-hole has, on a hole wall of the core region of the through-hole, a concave portion which is recessed relative to hole walls of the cladded layer regions of the through-hole.Type: GrantFiled: September 18, 2008Date of Patent: January 18, 2011Assignee: Hitachi Cable, Ltd.Inventors: Mineo Washima, Takaaki Sasaoka, Masahiro Seido, Kazuhiko Nakagawa
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Patent number: 7862952Abstract: According to the present invention, there is provided a membrane electrode composite module including a membrane electrode composite formed by sandwiching both surfaces of an electrolyte membrane between gas diffusion electrodes, an anode current collecting plate having fuel flow holes through which fuel flows, and a cathode current collecting plate having oxygen flow holes through which oxygen flows, wherein both surfaces of the membrane electrode composite are sandwiched between the anode current collecting plate and the cathode current collecting plate, the membrane electrode composite module further including films made of a synthetic resin (a first film and a second film) which are a base of the anode current collecting plate and a base of the cathode current collecting plate.Type: GrantFiled: July 8, 2005Date of Patent: January 4, 2011Assignees: Hitachi, Ltd., Hitachi Cable, Ltd.Inventors: Ryuji Kohno, Tatsuya Nagata, Makoto Kitano, Masahiro Seido, Kazuhiko Nakagawa
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Patent number: 7763393Abstract: A fuel cell having: a fuel electrode and an oxidant electrode disposed to sandwich a solid polymer electrolyte membrane; current collecting plates disposed outside of the fuel electrode and the oxidant electrode; a fuel electrode channel member disposed outside of the current collecting plate disposed outside of the fuel electrode; and an oxidant electrode channel member disposed outside of the current collecting plate disposed outside of the oxidant electrode. The oxidant electrode channel member has a thickness of not less than 1.2 mm. The fuel cell is a direct methanol type fuel cell.Type: GrantFiled: May 12, 2006Date of Patent: July 27, 2010Assignee: Hitachi Cable, Ltd.Inventors: Kazuhiko Nakagawa, Masahiro Seido, Mineo Washima, Takaaki Sasaoka, Kunihiro Fukuda, Katsumi Nomura
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Publication number: 20100096117Abstract: A radiator plate includes a core having core surfaces and holes whose hole axes are directed in a direction along a normal direction of the core surface, and heat transfer plates joined to the core surfaces and filled in the holes. A multilayer radiator plate includes a first radiator plate including a first core having first core surfaces and first holes whose hole axes are directed in a direction along a normal direction of the first core surface and first heat transfer plates joined to the first core surfaces and filled in the first holes, a second radiator plate including a second core having second core surfaces and second holes whose hole axes are directed in a direction along a normal direction of the second core surface and second heat transfer plates joined to the second core surfaces and filled in the second holes, and the first radiator plate and the second radiator plate are joined to each other.Type: ApplicationFiled: October 16, 2009Publication date: April 22, 2010Inventors: Masahiro SEIDO, Kazuhiko Nakagawa, Chingping Tong
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Publication number: 20090312187Abstract: A metallic thin film is wound around a core material made of a first metallic material in a predetermined number of windings to provide a first wire rod having a diameter which is applicable for roll forming in a longitudinal direction of the core material. The metallic thin film is formed by rolling a second metallic material and carrying out an annealing heat treatment on the rolled second metallic material. The first wire rod is cut to provide second wire rods, and the second wire rods are filled into a billet for multi-wires to provide a multi billet. The multi billet is extruded and drawn. Thereafter, a heat treatment is carried out on the drawn material to provide a superconducting wire.Type: ApplicationFiled: May 4, 2009Publication date: December 17, 2009Applicant: Hitachi Cable, Ltd.Inventors: Masahiro Seido, Katsumi Ohata, Kazuhiko Nakagawa
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Publication number: 20090239129Abstract: A metal separator for a fuel cell includes a plurality of flow passage grooves for flowing a fluid for operating the fuel cell; manifold holes provided on each side of an upper stream and a lower stream of the plurality of flow passage grooves and formed so as to penetrate a separator made of metal for the fuel cell; communication grooves formed on a separator surface of the separator, for connecting inlets/outlets of the plurality of flow passage grooves and the manifold holes to flow the fluid; a fluid flowing structure part made of metal, in which a through hole is formed on the separator surface that forms the communication grooves, formed in the vicinity of the manifold hole so as to traverse the communication groove; and a flat seal surface formed on the fluid flowing structure part, for sealing a surface of a member that shields an opening of the communication grooves in a state of a face contact.Type: ApplicationFiled: March 19, 2009Publication date: September 24, 2009Applicant: HITACHI CABLE, LTD.Inventors: Masahiro SEIDO, Takaaki SASAOKA
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Publication number: 20090092878Abstract: A current-collecting composite plate for a fuel cell configured with unit cells according to the present invention, which comprises: an insulator layer; and a plurality of pairs of conductor layers, the conductor layers being bonded to the insulator layer to be spaced apart from each other by a predetermined distance, each pair being used for adjacently disposed anode and cathode electrodes for a different one of the unit cells by sandwiching an electrolyte assembly therebetween. And, each conductor layer includes: a first conductor layer of a corrosion resistant metal treated with an electrically conductive surface treatment; a second conductor layer of a metal with low electrical resistivity; a through-hole penetrating the first conductor layer and the insulator layer; and a connecting portion formed of the second conductor layer for connecting the unit cells.Type: ApplicationFiled: October 2, 2008Publication date: April 9, 2009Inventors: Masahiro Seido, Kazuhiko Nakagawa, Takaaki Sasaoka, Mineo Washima
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Publication number: 20090081520Abstract: A metal separator for fuel cells formed with a metal plate and provided between cells accumulated, in which the metal plate is formed like trapezoidal irregularities to separate channels for a fuel gas from ones for an oxidant gas. Slope portions are formed after forming uniformly and thinly wall thickness of both upper and lower flat portions or either of the upper or the lower flat portion to 90% or less of that of the metal plate to be formed to obtain trapezoidal irregularities by forming flat portions which contact upper and lower cells and slope portions which interconnect the upper and the lower flat portions.Type: ApplicationFiled: September 17, 2008Publication date: March 26, 2009Inventors: Masahiro Seido, Kazuhiko Nakagawa, Takaaki Sasaoka, Mineo Washima
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Publication number: 20090081522Abstract: A metal composite for fuel cells according to the present invention, which includes: a core of a metal; cladded layers of a corrosion resistant metal covering both surfaces of the core; and a through-hole formed through the core and cladded layers. The through-hole has, on a hole wall of the core region of the through-hole, a concave portion which is recessed relative to hole walls of the cladded layer regions of the through-hole.Type: ApplicationFiled: September 18, 2008Publication date: March 26, 2009Inventors: Mineo Washima, Takaaki Sasaoka, Masahiro Seido, Kazuhiko Nakagawa
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Patent number: 7399532Abstract: A corrosive resistant metal material covered with a conductive substance suitable for use in a component material requiring conductivity and corrosion resistance like electrical conductive material, electrical contact, electromagnetic wave shield, electrochemical electrode or antistatic material, specifically for component material requiring conductivity in sever condition of corrosive environment is provided. A corrosive resistant metal material covered with a conductive substance is formed by cladding a corrosive resistant metal selected from the group consisting of titanium, zirconium, tantalum, niobium and alloy thereof on a conductive metal selected from the group consisting of iron, aluminum, copper, titanium, magnesium, zirconium, tantalum, niobium, tungsten, nickel, chrome and alloy thereof, and covering a conductive surface finishing layer over surface of a corrosive resistant metal layer with a mixture of conductive substance and resinous binder.Type: GrantFiled: March 14, 2003Date of Patent: July 15, 2008Assignees: Hitachi Cable, Ltd., Hitachi Powdered Metals Co., Ltd.Inventors: Masahiro Seido, Tatsuya Tonogi, Kazuhiko Nakagawa, Minoru Shirahige, Masahiro Okahara
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Publication number: 20080057371Abstract: Disclosed is a separator for fuel cells which is decreased in the amount of an expensive noble metal used as a raw material while being maintained to be conductive to the MEA. This separator has durability and corrosion resistance to very corrosive substances such as fluorine ions or hydrofluoric acid. Also disclosed is a method for producing such a separator for fuel cells. Specifically disclosed is a metal separator (15, 17) which is used in a polymer electrolyte fuel cell using a fluorine-containing polymer electrolyte membrane. This metal separator (15, 17) comprises a stainless steel base (20) processed to have a plurality of fuel gas channels (14).Type: ApplicationFiled: May 24, 2006Publication date: March 6, 2008Inventors: Mineo Washima, Masahiro Seido, Takaaki Sasaoka, Katsumi Nomura
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Publication number: 20060269821Abstract: A fuel cell having: a fuel electrode and an oxidant electrode disposed to sandwich a solid polymer electrolyte membrane; current collecting plates disposed outside of the fuel electrode and the oxidant electrode; a fuel electrode channel member disposed outside of the current collecting plate disposed outside of the fuel electrode; and an oxidant electrode channel member disposed outside of the current collecting plate disposed outside of the oxidant electrode. The oxidant electrode channel member has a thickness of not less than 1.2 mm. The fuel cell is a direct methanol type fuel cell.Type: ApplicationFiled: May 12, 2006Publication date: November 30, 2006Inventors: Kazuhiko Nakagawa, Masahiro Seido, Mineo Washima, Takaaki Sasaoka, Kunihiro Fukuda, Katsumi Nomura
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Publication number: 20060154131Abstract: A fuel cell separator is provided with: a core made of an Al alloy or a Mg alloy; a covering layer made of Ti or a Ti alloy formed on at least one side of the core; and a bonding metal layer formed between the core and the covering layer. The bonding metal layer is made of a metal with a deformation resistance lower than the core and the covering layer.Type: ApplicationFiled: December 28, 2005Publication date: July 13, 2006Inventors: Masahiro Seido, Mineo Washima, Kazuhiko Nakagawa, Kunihiro Fukuda, Takaaki Sasaoka, Katsumi Nomura
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Publication number: 20060024555Abstract: According to the present invention, there is provided a membrane electrode composite module including a membrane electrode composite formed by sandwiching both surfaces of an electrolyte membrane between gas diffusion electrodes, an anode current collecting plate having fuel flow holes through which fuel flows, and a cathode current collecting plate having oxygen flow holes through which oxygen flows, wherein both surfaces of the membrane electrode composite are sandwiched between the anode current collecting plate and the cathode current collecting plate, the membrane electrode composite module further including films made of a synthetic resin (a first film and a second film) which are a base of the anode current collecting plate and a base of the cathode current collecting plate.Type: ApplicationFiled: July 8, 2005Publication date: February 2, 2006Inventors: Ryuji Kohno, Tatsuya Nagata, Makoto Kitano, Masahiro Seido, Kazuhiko Nakagawa
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Patent number: 6805989Abstract: The surface of highly conductive iron, copper, aluminum, magnesium, or alloy thereof is covered with highly corrosion-resistant titanium or titanium alloy through plastic working by rolling or extrusion to form a cladding material. At least one surface of the cladding material is covered with a carbon material to form a separator for a solid polymer electrolyte fuel cell. By virtue of the above constitution, the separator for a solid polymer electrolyte fuel cell has good workability and, at the same time, can surely maintain or improve electrical conductivity and corrosion resistance.Type: GrantFiled: March 26, 2002Date of Patent: October 19, 2004Assignee: Hitachi Cable, Ltd.Inventors: Masahiro Seido, Tatsuya Tonogi, Tsutomu Yamanaka
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Publication number: 20040081879Abstract: A fuel cell bipolarplate has: a bipolarplate substrate that is of only a corrosion-resisting metallic material or a composite composed of a corrosion-resisting metallic material to define the surface layer of the composite and the other metallic material to define the inner layer of the composite; and a conductive contact layer that is formed on the bipolarplate substrate, the conductive contact layer being of noble metal and having a thickness of 0.0005 &mgr;m or greater and less than 0.01 &mgr;m.Type: ApplicationFiled: October 20, 2003Publication date: April 29, 2004Inventors: Mineo Washima, Masahiro Seido, Tatsuya Tonogi