Patents by Inventor Hitoshi Tanino
Hitoshi Tanino 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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Publication number: 20240117482Abstract: To provide a method for producing a separator that can suppress the generation of PVD film imperfections. A method for producing a separator for fuel cells, wherein a substrate of the separator comprises a metal material; wherein the method comprises: press-forming the substrate into a separator shape, washing the substrate with an acid, and forming an electroconductive film on a surface of the acid-washed substrate by physical vapor deposition; and wherein, in the acid washing, at least one surface of the substrate is dissolved in a thickness range of from 0.49 ?m to 5.00 ?m.Type: ApplicationFiled: October 9, 2023Publication date: April 11, 2024Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Hitoshi TANINO
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Patent number: 11652220Abstract: The present embodiment is a fuel cell including a stacked body of single cells each of which includes a power generating unit and separators disposed on both surfaces of the power generating unit, in which the separators each include a metal base material, a carbon layer made of carbon and formed on a first surface of the metal base material on a power generating unit side, and a titanium nitride layer made of titanium nitride and formed on a second surface of the metal base material opposite to the first surface.Type: GrantFiled: August 23, 2021Date of Patent: May 16, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Daichi Miyazaki, Masaki Hirano, Hitoshi Tanino, Tomonari Kogure
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Patent number: 11652218Abstract: Provided are a low-price fuel cell separator with high corrosion resistance and a method for manufacturing the separator. The present disclosure relates to a fuel cell separator including a metal substrate and a titanium layer containing titanium formed on the metal substrate, and a method for manufacturing the separator. A ratio of a (100) plane to a sum of values obtained by dividing peak intensities of the (100) plane, a (002) plane, and a (101) plane derived from titanium in an X-ray diffraction analysis of a separator surface by respective relative intensities is a constant value or more.Type: GrantFiled: October 14, 2021Date of Patent: May 16, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takashi Aisaka, Hitoshi Tanino
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Publication number: 20220123326Abstract: Provided are a low-price fuel cell separator with high corrosion resistance and a method for manufacturing the separator. The present disclosure relates to a fuel cell separator including a metal substrate and a titanium layer containing titanium formed on the metal substrate, and a method for manufacturing the separator. A ratio of a (100) plane to a sum of values obtained by dividing peak intensities of the (100) plane, a (002) plane, and a (101) plane derived from titanium in an X-ray diffraction analysis of a separator surface by respective relative intensities is a constant value or more.Type: ApplicationFiled: October 14, 2021Publication date: April 21, 2022Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takashi AISAKA, Hitoshi Tanino
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Publication number: 20220109163Abstract: The present embodiment is a fuel cell including a stacked body of single cells each of which includes a power generating unit and separators disposed on both surfaces of the power generating unit, in which the separators each include a metal base material, a carbon layer made of carbon and formed on a first surface of the metal base material on a power generating unit side, and a titanium nitride layer made of titanium nitride and formed on a second surface of the metal base material opposite to the first surface.Type: ApplicationFiled: August 23, 2021Publication date: April 7, 2022Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Daichi MIYAZAKI, Masaki HIRANO, Hitoshi TANINO, Tomonari KOGURE
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Patent number: 9840751Abstract: Provided is a method for manufacturing a hot stamped body, the method including: a hot-rolling step; a coiling step; a cold-rolling step; a continuous annealing step; and a hot stamping step, in which the continuous annealing step includes a heating step of heating the cold-rolled steel sheet to a temperature range of equal to or higher than Ac1° C. and lower than Ac3° C.; a cooling step of cooling the heated cold-rolled steel sheet from the highest heating temperature to 660° C. at a cooling rate of equal to or less than 10° C./s; and a holding step of holding the cooled cold-rolled steel sheet in a temperature range of 550° C. to 660° C. for one minute to 10 minutes.Type: GrantFiled: February 2, 2017Date of Patent: December 12, 2017Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Kunio Hayashi, Toshimitsu Aso, Toshimasa Tomokiyo, Hitoshi Tanino, Ryozo Wada
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Publication number: 20170145531Abstract: Provided is a method for manufacturing a hot stamped body, the method including: a hot-rolling step; a coiling step; a cold-rolling step; a continuous annealing step; and a hot stamping step, in which the continuous annealing step includes a heating step of heating the cold-rolled steel sheet to a temperature range of equal to or higher than Ac1° C. and lower than Ac3° C.; a cooling step of cooling the heated cold-rolled steel sheet from the highest heating temperature to 660° C. at a cooling rate of equal to or less than 10° C./s; and a holding step of holding the cooled cold-rolled steel sheet in a temperature range of 550° C. to 660° C. for one minute to 10 minutes.Type: ApplicationFiled: February 2, 2017Publication date: May 25, 2017Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Kunio HAYASHI, Toshimitsu ASO, Toshimasa TOMOKIYO, Hitoshi TANINO, Ryozo WADA
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Patent number: 9598745Abstract: The present invention provides a method for manufacturing a hot stamped body, the method including: a hot-rolling step; a coiling step; a cold-rolling step; a continuous annealing step; and a hot stamping step, in which the continuous annealing step includes a heating step of heating the cold-rolled steel sheet to a temperature range of equal to or higher than Ac1° C. and lower than Ac3° C.; a cooling step of cooling the heated cold-rolled steel sheet from the highest heating temperature to 660° C. at a cooling rate of equal to or less than 10° C./s; and a holding step of holding the cooled cold-rolled steel sheet in a temperature range of 550° C. to 660° C. for one minute to 10 minutes.Type: GrantFiled: October 21, 2011Date of Patent: March 21, 2017Assignees: NIPPON STEEL & SUMITOMO METAL CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN TAKAOKA CO., LTD.Inventors: Kunio Hayashi, Toshimitsu Aso, Toshimasa Tomokiyo, Hitoshi Tanino, Ryozo Wada
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Patent number: 9017601Abstract: An iron-based sintered alloy of the present invention is an iron-based sintered alloy, which is completed by sintering a powder compact made by press forming a raw material powder composed of Fe mainly, and is such that: when the entirety is taken as 100% by mass, carbon is 0.1-1.0% by mass; Mn is 0.01-1.5% by mass; the sum of the Mn and Si is 0.02-3.5% by mass; and the major balance is Fe. It was found out that, by means of an adequate amount of Mn and Si, iron-based sintered alloys are strengthened and additionally a good dimensional stability is demonstrated. As a result, it is possible to suppress or obsolete the employment of Cu or Ni, which has been believed to be essential virtually, the recyclability of iron-based sintered alloys can be enhanced, and further their cost reduction can be intended.Type: GrantFiled: December 2, 2009Date of Patent: April 28, 2015Assignees: Kabushiki Kaisha Toyota Chuo Kenkyusho, Toyota Jidosha Kabushiki KaishaInventors: Mikio Kondoh, Nobuhiko Matsumoto, Toshitake Miyake, Shigehide Takemoto, Hitoshi Tanino
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Publication number: 20130292009Abstract: The present invention provides a method for manufacturing a hot stamped body, the method including: a hot-rolling step; a coiling step; a cold-rolling step; a continuous annealing step; and a hot stamping step, in which the continuous annealing step includes a heating step of heating the cold-rolled steel sheet to a temperature range of equal to or higher than Ac1° C. and lower than Ac3° C.; a cooling step of cooling the heated cold-rolled steel sheet from the highest heating temperature to 660° C. at a cooling rate of equal to or less than 10° C./s; and a holding step of holding the cooled cold-rolled steel sheet in a temperature range of 550° C. to 660° C. for one minute to 10 minutes.Type: ApplicationFiled: October 21, 2011Publication date: November 7, 2013Inventors: Kunio Hayashi, Toshimitsu Aso, Toshimasa Tomokiyo, Hitoshi Tanino, Ryozo Wada
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Patent number: 8038761Abstract: There is provided an iron-based sintered material resistant to the metal fatigue developing from the voids therein functioning as the initial points and improved in the strength and machinability thereof. An iron-based sintered material, including a mixed structure of martensite, bainite, and pearlite and multiple voids formed in the mixed structure, wherein the ratio of martensite and bainite in the mixed structure is 70% or more; the ratio of martensite and/or bainite in the mixed structure forming the void surface is 90% or more; and the density of the iron-based sintered material is 7.4 g/cm3 or more.Type: GrantFiled: March 21, 2008Date of Patent: October 18, 2011Assignee: Toyota Jidosha Kabushiki KaishaInventors: Hitoshi Tanino, Kimihiko Ando, Shinya Omura, Toshitake Miyake, Mikio Kondoh, Nobuhiko Matsumoto
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Patent number: 8001947Abstract: Disclosed is a piston for internal-combustion engines, which includes a low thermal-conductive member disposed at the top portion thereof, the low thermal-conductive member including an alloy containing Fe and Mn. The low thermal-conductive member includes a sintered body having 10˜60 mass % of Mn, 2 mass % or less of C, and the balance of Fe and inevitable impurities. Since the piston has the low thermal-conductive member having low thermal conductivity and thermal expansion properties similar to those of the aluminum alloy, which is the base metal of the piston, an increase in the temperature of a combustion chamber and vaporization of fuel are effectively promoted. Furthermore, thermal fatigue failure and separation of the low thermal-conductive member are prevented.Type: GrantFiled: May 22, 2007Date of Patent: August 23, 2011Assignee: Toyota Jidosha Kabushiki KaishaInventors: Kimihiko Ando, Hitoshi Tanino
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Publication number: 20100074790Abstract: An iron-based sintered alloy of the present invention is an iron-based sintered alloy, which is completed by sintering a powder compact made by press forming a raw material powder composed of Fe mainly, and is such that: when the entirety is taken as 100% by mass, carbon is 0.1-1.0% by mass; Mn is 0.01-1.5% by mass; the sum of the Mn and Si is 0.02-3.5% by mass; and the major balance is Fe. It was found out that, by means of an adequate amount of Mn and Si, iron-based sintered alloys are strengthened and additionally a good dimensional stability is demonstrated. As a result, it is possible to suppress or obsolete the employment of Cu or Ni, which has been believed to be essential virtually, the recyclability of iron-based sintered alloys can be enhanced, and further their cost reduction can be intended.Type: ApplicationFiled: December 2, 2009Publication date: March 25, 2010Applicants: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Mikio KONDOH, Nobuhiko Matsumoto, Toshitake Miyake, Shigehide Takemoto, Hitoshi Tanino
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Publication number: 20090126676Abstract: Disclosed is a piston for internal-combustion engines, which includes a low thermal-conductive member disposed at the top portion thereof, the low thermal-conductive member including an alloy containing Fe and Mn. The low thermal-conductive member includes a sintered body having 10˜60 mass % of Mn, 2 mass % or less of C, and the balance of Fe and inevitable impurities. Since the piston has the low thermal-conductive member having low thermal conductivity and thermal expansion properties similar to those of the aluminum alloy, which is the base metal of the piston, an increase in the temperature of a combustion chamber and vaporization of fuel are effectively promoted. Furthermore, thermal fatigue failure and separation of the low thermal-conductive member are prevented.Type: ApplicationFiled: May 22, 2007Publication date: May 21, 2009Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kimihiko Ando, Hitoshi Tanino
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Publication number: 20090064819Abstract: There is here disclosed an Fe-based sintered alloy produced through a mixing step of mixing an Fe—Mn alloy powder, graphite powder and Fe powder by a mixer (S16), a compacting step of compacting the mixed powder at a predetermined pressure (S18), and a sintering step of sintering the resultant compact in a sintering oven at a predetermined temperature for a predetermined time (S20), the Fe—Mn alloy powder being characterized by containing 2-30 mass % of Mn. In particular, the mixing step (S16) is carried out by mixing 5-50 mass % of the Fe—Mn alloy powder, 0.2-2 mass % of the graphite powder, and the remainder of the Fe powder in the mixer. Consequently, mechanical strength of the Fe-based sintered alloy can be further improved.Type: ApplicationFiled: March 17, 2006Publication date: March 12, 2009Inventors: Kimihiko Ando, Hitoshi Tanino
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Publication number: 20080233421Abstract: There is provided an iron-based sintered material resistant to the metal fatigue developing from the voids therein functioning as the initial points and improved in the strength and machinability thereof. An iron-based sintered material, including a mixed structure of martensite, bainite, and pearlite and multiple voids formed in the mixed structure, wherein the ratio of martensite and bainite in the mixed structure is 70% or more; the ratio of martensite and/or bainite in the mixed structure forming the void surface is 90% or more; and the density of the iron-based sintered material is 7.4 g/cm3 or more.Type: ApplicationFiled: March 21, 2008Publication date: September 25, 2008Inventors: Hitoshi TANINO, Kimihiko ANDO, Shinya OMURA, Toshitake MIYAKE, Mikio KONDOH, Nobuhiko MATSUMOTO
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Publication number: 20080025866Abstract: An iron-based sintered alloy of the present invention is an iron-based sintered alloy, which is completed by sintering a powder compact made by press forming a raw material powder composed of Fe mainly, and is such that: when the entirety is taken as 100% by mass, carbon is 0.1-1.0% by mass; Mn is 0.01-1.5% by mass; the sum of the Mn and Si is 0.02-3.5% by mass; and the major balance is Fe. It was found out that, by means of an adequate amount of Mn and Si, iron-based sintered alloys are strengthened and additionally a good dimensional stability is demonstrated. As a result, it is possible to suppress or obsolete the employment of Cu or Ni, which has been believed to be essential virtually, the recyclability of iron-based sintered alloys can be enhanced, and further their cost reduction can be intended.Type: ApplicationFiled: April 22, 2005Publication date: January 31, 2008Applicants: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Mikio Kondoh, Nobuhiko Matsumoto, Toshitake Miyake, Shigehide Takemoto, Hitoshi Tanino