Patents by Inventor Kazuhiro Yamamura
Kazuhiro Yamamura 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: 11898661Abstract: Provided is a fluororubber composition capable of providing a crosslinked fluororubber article that exhibits not only heat resistance, but also excellent mechanical properties at high temperatures. The fluororubber composition includes a fluororubber (A), a carbon black (B), and an aromatic petroleum resin (E), and the fluororubber composition has a difference ?G? (G? (1%)?G? (100%)) of not lower than 120 kPa and not higher than 3,000 kPa, where G? (1%) denotes a shear modulus at a dynamic strain of 1%, G? (100%) denotes a shear modulus at a dynamic strain of 100%, and G? (1%) and G? (100%) are determined by a dynamic viscoelasticity test carried out on an unvulcanised rubber with a rubber process analyzer (RPA) in a condition that the measurement frequency is 1 Hz and the measurement temperature is 100° C.Type: GrantFiled: February 22, 2013Date of Patent: February 13, 2024Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Daisuke Ota, Akinori Ueda, Yuu Kadowaki, Mayuko Taeda, Masanori Kitaichi, Kazuhiro Yamamura, Michiko Doi, Shoji Fukuoka
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Patent number: 11859075Abstract: A core-shell particle including a core containing a perfluoropolymer and a shell containing a non-fluorine resin, the core having a periphery coated with the non-fluorine resin at a coverage of 90% or more, the perfluoropolymer being a polymer containing a polymerized unit based on a perfluoro monomer in an amount of 90 mol % or more relative to all polymerized units, and the shell having a mass of 50 or less relative to a total mass of the core and the shell of 80. Also disclosed is a method for producing the core-shell particle.Type: GrantFiled: December 13, 2018Date of Patent: January 2, 2024Assignees: DAIKIN INDUSTRIES, LTD., NISSIN CHEMICAL INDUSTRY CO., LTDInventors: Katsuhide Ohtani, Masamichi Sukegawa, Kazuhiro Yamamura, Shoichi Arima, Takeshi Fukuzumi, Yuji Gama
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Patent number: 11306370Abstract: Provided is a blade material having high strength. The blade material contains, in % by mass, 0.5 to 0.8% of C, 1.0% or less of Si, 1.0% or less of Mn, 11 to 15% of Cr, and 0.1 to 0.8% of V, the remainder includes Fe and inevitable impurities, and has a thickness of 0.5 mm or less, wherein the structure of the blade material as observed after polishing the surface thereof has ferrites and carbides, the carbides have an average particle diameter of 0.5 ?m or less, and a proportion of carbides containing V in the carbides is 50% or less in terms of a proportion in an area of a field of view.Type: GrantFiled: September 6, 2017Date of Patent: April 19, 2022Assignee: HITACHI METALS, LTD.Inventor: Kazuhiro Yamamura
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Patent number: 10995384Abstract: There is provided a steel for solid oxide fuel cells which contains more than 0 and not more than 0.05 mass % of C, 0.05 mass % or less of N, 0.01 mass % or less of O, 0.2 mass % or less of Al, 0.15 mass % or less of Si, 0.1 to 1.0 mass % of Mn, 20.0 to 25.0 mass % of Cr, more than 0 mass % and not more than 1.0 mass % of Ni, 0.02 to 0.12 mass % of La, 0.1 to 0.5 mass % of Zr, 0.15 to 0.5 mass % of La+Zr, and Fe and impurities as a remainder. The following relational formula is satisfied, and an Fe and Zr-containing intermetallic compound viewed in a ferrite matrix is 1.1 % or less in terms of a visual field area ratio 5(7C+6N)/(7?4(7C+6N))?Zr?41(7C+6N)/(7+66(7C+6N)).Type: GrantFiled: September 30, 2015Date of Patent: May 4, 2021Assignee: HITACHI METALS, LTD.Inventors: Kazuhiro Yamamura, Toshihiro Uehara, Shigenori Tanaka
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Publication number: 20210070974Abstract: A core-shell particle including a core containing a perfluoropolymer and a shell containing a non-fluorine resin, the core having a periphery coated with the non-fluorine resin at a coverage of 90% or more, the perfluoropolymer being a polymer containing a polymerized unit based on a perfluoro monomer in an amount of 90 mol % or more relative to all polymerized units, and the shell having a mass of 50 or less relative to a total mass of the core and the shell of 80. Also disclosed is a method for producing the core-shell particle.Type: ApplicationFiled: December 13, 2018Publication date: March 11, 2021Applicants: DAIKIN INDUSTRIES, LTD., NISSIN CHEMICAL INDUSTRY CO., LTD.Inventors: Katsuhide OHTANI, Masamichi SUKEGAWA, Kazuhiro YAMAMURA, Shoichi ARIMA, Takeshi FUKUZUMI, Yuji GAMA
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Publication number: 20190211418Abstract: Provided is a blade material having high strength. The blade material contains, in % by mass, 0.5 to 0.8% of C, 1.0% or less of Si, 1.0% or less of Mn, 11 to 15% of Cr, and 0.1 to 0.8% of V, the remainder includes Fe and inevitable impurities, and has a thickness of 0.5 mm or less, wherein the structure of the blade material as observed after polishing the surface thereof has ferrites and carbides, the carbides have an average particle diameter of 0.5 ?m or less, and a proportion of carbides containing V in the carbides is 50% or less in terms of a proportion in an area of a field of view.Type: ApplicationFiled: September 6, 2017Publication date: July 11, 2019Applicant: Hitachi Metals, Ltd.Inventor: Kazuhiro YAMAMURA
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Patent number: 9976016Abstract: A fluororubber composition including a fluororubber having an iodine content of 10 to 90 mol % for the total mole of the polymer end groups and a carbon black (B), wherein a difference (?G?), represented by G?(1%)-G?(100%), is not lower than 120 kPa and not higher than 3,000 kPa, where G?(1%) denotes a shear modulus at a dynamic strain of 1% under an uncrosslinked state and G?(100%) denotes a shear modulus at a dynamic strain of 100% under an uncrosslinked state, and G?(1%) and G?(100%) are determined by a dynamic viscoelasticity test with a rubber process analyzer (RPA) in a condition that the measurement frequency is 1 Hz and the measurement temperature is 100° C.Type: GrantFiled: February 22, 2013Date of Patent: May 22, 2018Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Daisuke Ota, Shigeru Morita, Akinori Ueda, Yuu Kadowaki, Masanori Kitaichi, Michiko Doi, Kazuhiro Yamamura, Shoji Fukuoka, Mayuko Taeda
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Publication number: 20170275728Abstract: There is provided a steel for solid oxide fuel cells which contains Zr and has a composition balance which allows a thin plate to stably obtain excellent oxidation resistance. The steel for solid oxide fuel cells contains more than 0 and not more than 0.05 mass % of C, 0.05 mass % or less of N, 0.01 mass % or less of O, 0.2 mass % or less of Al, 0.15 mass % or less of Si, 0.1 to 1.0 mass % of Mn, 20.0 to 25.0 mass % of Cr, more than 0 mass % and not more than 1.0 mass % of Ni, 0.02 to 0.12 mass % of La, 0.1 to 0.5 mass % of Zr, 0.15 to 0.5 mass % of La+Zr, and Fe and impurities as a remainder. The following relational formula is satisfied, and an Fe and Zr-containing intermetallic compound viewed in a ferrite matrix is 1.1 mass % or less in terms of a visual field area ratio.Type: ApplicationFiled: September 30, 2015Publication date: September 28, 2017Applicant: Hitachi Metals, Ltd.Inventors: Kazuhiro YAMAMURA, Toshihiro UEHARA, Shigenori TANAKA
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Patent number: 9499678Abstract: A fluororubber composition which includes a fluororubber (A) and a carbon black (B). The fluororubber (A) is a vinylidene fluoride-based fluororubber including a structural unit (VdF unit) derived from vinylidene fluoride and a structural unit derived from at least one monomer selected from the group consisting of hexafluoropropylene (HFP), 2,3,3,3-tetrafluoro propylene, and perfluoro(alkyl vinyl ether) (PAVE). The molar ratio of the VdF unit to the structural unit derived from at least one monomer selected from the group consisting of HFP, 2,3,3,3-tetrafluoro propylene, and PAVE is 50/50 to 78/22. The fluororubber composition has a difference ?G? (G? (1%)-G? (100%)) of not lower than 120 kPa and not higher than 3,000 kPa, where G? (1%) denotes a modulus of shearing elasticity at a dynamic strain of 1%, G? (100%) denotes a modulus of shearing elasticity at a dynamic strain of 100%, and G? (1%) and G? (100%) are determined by a dynamic viscoelasticity test.Type: GrantFiled: February 22, 2013Date of Patent: November 22, 2016Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Daisuke Ota, Akinori Ueda, Yuu Kadowaki, Mayuko Taeda, Masanori Kitaichi, Kazuhiro Yamamura, Michiko Doi, Shoji Fukuoka
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Patent number: 9403954Abstract: The invention provides a fluororubber composition able to produce a crosslinked fluororubber article that exhibits not only heat resistance, but also excellent mechanical properties at high temperatures, and a method for producing same. The fluororubber composition contains: a fluororubber (A); and carbon black (B), wherein when the aforementioned fluororubber composition is immersed for 160 hours in an extraction solvent of acetone and hexane at an acetone:hexane mass ratio of 42.29:57.71 at 40° C. and an extraction residue that is not extracted and remains as a solid is separated from the aforementioned extraction solvent and dried and then the dry weight of the extraction residue is measured, the quantity of a solvent-insoluble polymer is not lower than 5%.Type: GrantFiled: January 18, 2013Date of Patent: August 2, 2016Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Daisuke Ota, Akinori Ueda, Yuu Kadowaki, Mayuko Taeda, Masanori Kitaichi, Michiko Doi, Kazuhiro Yamamura, Shoji Fukuoka
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Patent number: 9266071Abstract: Disclosed is a hydrogen separation alloy which is adoptable to a product having a large surface area of a side where hydrogen permeates and which has such a metallographic structure as to improve hydrogen permeability and to improve hydrogen-embrittlement resistance. The hydrogen separation alloy used herein is represented by the compositional formula: Nb100?(?+?)M1?M2? where M1 is at least one element selected from the group consisting of Ti, Zr and Hf; M2 is at least one element selected from the group consisting of Ni, Co, Cr, Fe, Cu and Zn; 10???60, 10???50, and ?+??80. The alloy contains inevitable impurities. And the alloy includes two phases, i.e., an Nb-M1 phase serving as a hydrogen-permeable phase, and a M2-M1 phase serving as a hydrogen-embrittlement-resistant phase. The hydrogen-permeable phase and the hydrogen-embrittlement-resistant phase have an elongated structure resulting from rolling.Type: GrantFiled: May 31, 2011Date of Patent: February 23, 2016Assignee: Hitachi Metals, Ltd.Inventors: Kazuhiro Yamamura, Masahiro Tobise
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Patent number: 9260304Abstract: It is an objective of the invention to provide a method for operating hydrogen separation devices which is capable of efficiently suppressing hydrogen embrittlement in a hydrogen separation alloy membrane and to provide a hydrogen separation device that performs favorably during repeated starting/stopping operations thereof. There is provided a method for operating a hydrogen separation device for separating hydrogen from a mixture hydrogen gas using a membrane separation technique with a hydrogen separation alloy membrane. The method comprises the successive steps of: stopping supply of the mixture hydrogen gas to the hydrogen separation alloy membrane with a temperature of the membrane within a range from 300 to 600° C.; supplying an oxidizing gas over a predetermined duration to at least an upstream side of the membrane with a temperature of the membrane within a range from 300 to 600° C.; and lowering the temperature of the membrane to below 200° C.Type: GrantFiled: September 12, 2012Date of Patent: February 16, 2016Assignee: Hitachi Metals, Ltd.Inventors: Takao Ishikawa, Kazuhiro Yamamura
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Publication number: 20150330537Abstract: Provided is a fluororubber composition capable of providing a crosslinked fluororubber article that exhibits not only heat resistance, but also excellent mechanical properties at high temperatures. The fluororubber composition includes a fluororubber (A), a carbon black (B), and an aromatic petroleum resin (E), and the fluororubber composition has a difference ?G? (G? (1%)?G? (100%)) of not lower than 120 kPa and not higher than 3,000 kPa, where G? (1%) denotes a shear modulus at a dynamic strain of 1%, G? (100%) denotes a shear modulus at a dynamic strain of 100%, and G? (1%) and G? (100%) are determined by a dynamic viscoelasticity test carried out on an unvulcanised rubber with a rubber process analyzer (RPA) in a condition that the measurement frequency is 1 Hz and the measurement temperature is 100° C.Type: ApplicationFiled: February 22, 2013Publication date: November 19, 2015Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Daisuke OTA, Akinori UEDA, Yuu KADOWAKI, Mayuko TAEDA, Masanori KITAICHI, Kazuhiro YAMAMURA, Michiko DOI, Shoji FUKUOKA
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Publication number: 20150031822Abstract: A fluororubber composition which includes a fluororubber (A) and a carbon black (B). The fluororubber (A) is a vinylidene fluoride-based fluororubber including a structural unit (VdF unit) derived from vinylidene fluoride and a structural unit derived from at least one monomer selected from the group consisting of hexafluoropropylene (HFP), 2,3,3,3-tetrafluoro propylene, and perfluoro(alkyl vinyl ether) (PAVE). The molar ratio of the VdF unit to the structural unit derived from at least one monomer selected from the group consisting of HFP, 2,3,3,3-tetrafluoro propylene, and PAVE is 50/50 to 78/22. The fluororubber composition has a difference ?G? (G? (1%)-G? (100%)) of not lower than 120 kPa and not higher than 3,000 kPa, where G? (1%) denotes a modulus of shearing elasticity at a dynamic strain of 1%, G? (100%) denotes a modulus of shearing elasticity at a dynamic strain of 100%, and G? (1%) and G? (100%) are determined by a dynamic viscoelasticity test.Type: ApplicationFiled: February 22, 2013Publication date: January 29, 2015Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Daisuke Ota, Akinori Ueda, Yuu Kadowaki, Mayuko Taeda, Masanori Kitaichi, Kazuhiro Yamamura, Michiko Doi, Shoji Fukuoka
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Publication number: 20150017364Abstract: A fluororubber composition including a fluororubber having an iodine content of 10 to 90 mol % for the total mole of the polymer end groups and a carbon black (B), wherein a difference (?G?), represented by G?(1%)-G?(100%), is not lower than 120 kPa and not higher than 3,000 kPa, where G?(1%) denotes a shear modulus at a dynamic strain of 1% under an uncrosslinked state and G?(100%) denotes a shear modulus at a dynamic strain of 100% under an uncrosslinked state, and G?(1%) and G?(100%) are determined by a dynamic viscoelasticity test with a rubber process analyzer (RPA) in a condition that the measurement frequency is 1 Hz and the measurement temperature is 100° C.Type: ApplicationFiled: February 22, 2013Publication date: January 15, 2015Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Daisuke Ota, Shigeru Morita, Akinori Ueda, Yuu Kadowaki, Masanori Kitaichi, Michiko Doi, Kazuhiro Yamamura, Shoji Fukuoka, Mayuko Taeda
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Publication number: 20140288226Abstract: The invention provides a method for producing a fluororubber composition that is able to give a crosslinked article that exhibits not only heat resistance, but also excellent mechanical properties at high temperatures. A method for producing a fluororubber composition includes: a step (1-1) of mixing a fluororubber (A) and a carbon black (B) by means of an internal mixer until the maximum temperature reaches 80 to 220° C. so as to obtain an intermediate composition; a step (1-2) of cooling the intermediate composition to a temperature of less than 50° C.; and a step (2-1) of mixing the cooled intermediate composition until the maximum temperature reaches not lower than 10° C. but lower than 80° C. so as to obtain a fluororubber composition.Type: ApplicationFiled: January 18, 2013Publication date: September 25, 2014Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Daisuke Ota, Akinori Ueda, Yuu Kadowaki, Mayuko Taeda, Masanori Kitaichi, Michiko Doi, Kazuhiro Yamamura, Shoji Fukuoka
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Publication number: 20140271450Abstract: It is an objective of the invention to provide a method for operating hydrogen separation devices which is capable of efficiently suppressing hydrogen embrittlement in a hydrogen separation alloy membrane and to provide a hydrogen separation device that performs favorably during repeated starting/stopping operations thereof. There is provided a method for operating a hydrogen separation device for separating hydrogen from a mixture hydrogen gas using a membrane separation technique with a hydrogen separation alloy membrane. The method comprises the successive steps of: stopping supply of the mixture hydrogen gas to the hydrogen separation alloy membrane with a temperature of the membrane within a range from 300 to 600° C.; supplying an oxidizing gas over a predetermined duration to at least an upstream side of the membrane with a temperature of the membrane within a range from 300 to 600° C.; and lowering the temperature of the membrane to below 200° C.Type: ApplicationFiled: September 12, 2012Publication date: September 18, 2014Inventors: Takao Ishikawa, Kazuhiro Yamamura
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Publication number: 20140228482Abstract: The invention provides a fluororubber composition able to produce a crosslinked fluororubber article that exhibits not only heat resistance, but also excellent mechanical properties at high temperatures, and a method for producing same. The fluororubber composition contains: a fluororubber (A); and carbon black (B), wherein when the aforementioned fluororubber composition is immersed for 160 hours in an extraction solvent of acetone and hexane at an acetone:hexane mass ratio of 42.29:57.71 at 40° C. and an extraction residue that is not extracted and remains as a solid is separated from the aforementioned extraction solvent and dried and then the dry weight of the extraction residue is measured, the quantity of a solvent-insoluble polymer is not lower than 5%.Type: ApplicationFiled: January 18, 2013Publication date: August 14, 2014Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Daisuke Ota, Akinori Ueda, Yuu Kadowaki, Mayuko Taeda, Masanori Kitaichi, Michiko Doi, Kazuhiro Yamamura, Shoji Fukuoka
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Publication number: 20140038064Abstract: Provided are: steel for solid oxide fuel cells, which is capable of ensuring sufficient oxidation resistance even if a predetermined amount of nitrogen is contained therein; and a member for solid oxide fuel cells, which uses the steel for solid oxide fuel cells. This steel for solid oxide fuel cells having excellent oxidation resistance contains, in mass %, 0.022% or less (including 0%) of C, 0.01-0.05% of N, 0.01% or less (including 0%) of 0, 0.15% or less (including 0%) of Al, 0.15% or less (including 0%) of Si, 0.1-0.5% of Mn, 22.0-25.0% of Cr, 1.0% or less (excluding 0%) of Ni, 1.5% or less (including 0%) of Cu, 0.02-0.12% of La and 0.01-1.50% of Zr with La+Zr being 0.03-1.60%, and 1.5-2.5% of W, with the balance made up of Fe and impurities. The ratio of Zr/(C+N) in mass % is preferably 10 or more.Type: ApplicationFiled: April 20, 2012Publication date: February 6, 2014Applicant: HITACHI METALS, LTD.Inventors: Nobutaka Yasuda, Toshihiro Uehara, Shigenori Tanaka, Kazuhiro Yamamura
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Publication number: 20120138196Abstract: Disclosed is a hydrogen separation alloy which is adoptable to a product having a large surface area of a side where hydrogen permeates and which has such a metallographic structure as to improve hydrogen permeability and to improve hydrogen-embrittlement resistance. The hydrogen separation alloy used herein is represented by the compositional formula: Nb100?(?+?)M1?M2? where M1 is at least one element selected from the group consisting of Ti, Zr and Hf; M2 is at least one element selected from the group consisting of Ni, Co, Cr, Fe, Cu and Zn; 10???60, 10???50, and ?+??80. The alloy contains inevitable impurities. And the alloy includes two phases, i.e., an Nb-M1 phase serving as a hydrogen-permeable phase, and a M2-M1 phase serving as a hydrogen-embrittlement-resistant phase. The hydrogen-permeable phase and the hydrogen-embrittlement-resistant phase have an elongated structure resulting from rolling.Type: ApplicationFiled: May 31, 2011Publication date: June 7, 2012Inventors: Kazuhiro Yamamura, Masahiro Tobise