Patents by Inventor Hiroaki Nagata
Hiroaki Nagata 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).
-
Publication number: 20170186534Abstract: A sintered magnet body (RaT1bMcBd) coated with a powder mixture of an intermetallic compound (R1iM1j, R1xT2yM1z, R1iM1jHk), alloy (M1dM2e) or metal (M1) powder and a rare earth (R2) oxide is diffusion treated. The R2 oxide is partially reduced during the diffusion treatment, so a significant amount of R2 can be introduced near interfaces of primary phase grains within the magnet through the passages in the form of grain boundaries. The coercive force is increased while minimizing a decline of remanence.Type: ApplicationFiled: March 9, 2017Publication date: June 29, 2017Applicant: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Hiroaki Nagata, Tadao Nomura, Takehisa Minowa
-
Publication number: 20170098503Abstract: A rare earth sintered magnet is an anisotropic sintered body comprising Nd2Fe14 B crystal phase as primary phase and having the composition R1aTbMcSidBe wherein R1 is a rare earth element inclusive of Sc and Y, T is Fe and/or Co, M is Al, Cu, Zn, In, P, S, Ti, V, Cr, Mn, Ni, Ga, Ge, Zr, Nb, Mo, Pd, Ag, Cd, Sn, Sb, Hf, Ta, or W, “a” to “e” are 12?a?17, 0?c?10, 0.3?d?7, 5?e?10, and the balance of b, wherein Dy and/or Tb is diffused into the sintered body from its surface.Type: ApplicationFiled: December 12, 2016Publication date: April 6, 2017Applicant: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Hiroaki Nagata, Yuuji Gouki, Kazuaki Sakaki, Tadao Nomura, Koichi Hirota, Hajime Nakamura
-
Patent number: 9608281Abstract: A new conductive interconnected porous film, useful as a material for a gas diffusion layer which is used in a solid polymer type fuel cell, which satisfies the requirements of a good conductivity, good gas permeability, surface smoothness, corrosion resistance, and low impurities and which is strong in bending and excellent in handling to an extent not obtainable by existing sheet materials of carbon fiber, that is, a conductive interconnected porous film wherein a resin base material part of a thermoplastic resin has a porous interconnected cell structure which is formed by removal of removable particulate matter and has cells of sizes of 10 ?m to 50 ?m and wherein the resin base material part is comprised of different particle size particles of first carbon particles of large size carbon particles of a diameter of 5 ?m or more and second carbon particles of micro size carbon particles of a diameter of 10 nm or more mixed together, and a method of production of the same.Type: GrantFiled: November 20, 2012Date of Patent: March 28, 2017Assignee: FUTAMURA KAGAKU KABUSHIKI KAISHAInventors: Takuzo Imaizumi, Hiroaki Nagata, Naoki Shiba
-
Publication number: 20160293304Abstract: The invention provides an R—Fe—B sintered magnet consisting essentially of 12-17 at % of Nd, Pr and R, 0.1-3 at % of M1, 0.05-0.5 at % of M2, 4.8+2*m to 5.9+2*m at % of B, and the balance of Fe, containing R2(Fe,(Co))14B intermetallic compound as a main phase, and having a core/shell structure that the main phase is covered with grain boundary phases. The sintered magnet exhibits a coercivity of at least 10 kOe despite a low or nil content of Dy, Tb and Ho.Type: ApplicationFiled: March 31, 2016Publication date: October 6, 2016Applicant: Shin-Etsu Chemical Co., Ltd.Inventors: Koichi Hirota, Hiroaki Nagata, Tetsuya Kume, Masayuki Kamata, Hajime Nakamura
-
Publication number: 20160293307Abstract: The invention provides an R—Fe—B sintered magnet consisting essentially of 12-17 at % of R, 0.1-3 at % of M1, 0.05-0.5 at % of M2, 4.8+2*m to 5.9+2*m at % of B, and the balance of Fe, containing R2(Fe,(Co))14B intermetallic compound as a main phase, and having a core/shell structure that the main phase is covered with a HR-rich layer and a (R,HR)—Fe(Co)-M1 phase wherein HR is Tb, Dy or Ho. The sintered magnet exhibits a coercivity ?10 kOe despite a low content of Dy, Tb, and Ho.Type: ApplicationFiled: March 31, 2016Publication date: October 6, 2016Applicant: Shin-Etsu Chemical Co., Ltd.Inventors: Koichi Hirota, Hiroaki Nagata, Tetsuya Kume, Hajime Nakamura
-
Publication number: 20160293303Abstract: The invention provides an R—Fe—B sintered magnet consisting essentially of 12-17 at % of Nd, Pr and R, 0.1-3 at % of M1, 0.05-0.5 at % of M2, 4.8+2*m to 5.9+2*m at % of B, and the balance of Fe, containing R2(Fe,(Co))14B intermetallic compound as a main phase, and having a core/shell structure that the main phase is covered with a grain boundary phases. The sintered magnet has an average grain size of less than 6 ?m, a crystal orientation of more than 98%, and a degree of magnetization of more than 96%, and exhibits a coercivity of at least 10 kOe despite a low or nil content of Dy, Tb, and Ho.Type: ApplicationFiled: March 31, 2016Publication date: October 6, 2016Applicant: Shin-Etsu Chemical Co., Ltd.Inventors: Koichi Hirota, Hiroaki Nagata, Tetsuya Kume, Hajime Nakamura
-
Publication number: 20160234945Abstract: Provided is a Bi-based solder alloy containing a specific amount of Al in Bi—Ag and having particles including a Ag—Al intermetallic compound dispersed therein, a method of bonding a Ag-plated electronic component, a bare Cu frame electronic component, an Ni-plated electronic component, or the like using the same, and an electronic component-mounted board. A Bi-based solder alloy includes Ag and Al, is substantially free of Pb, and has a Bi content of 80 mass % or more, a solidus of a melting point of 265° C. or more, and a liquidus of 390° C. or less. A content of Ag is 0.6 to 18 mass %, a content of Al is 0.1 to 3 mass %, the content of Al is 1/20 to 1/2 of the content of Ag, and particles including a Ag—Al intermetallic compound are dispersed in the solder alloy.Type: ApplicationFiled: August 27, 2014Publication date: August 11, 2016Applicant: SUMITOMO METAL MINING CO., LTD.Inventor: Hiroaki NAGATA
-
Patent number: 9199339Abstract: Disclosed herein is a high-temperature Pb-free solder alloy having the strength required to join electronic parts to a substrate and having excellence in wettability and workability. The high-temperature Pb-free solder alloy contains 0.4% by mass or more but 13.5% by mass or less of Zn, 0.05% by mass or more but 2.0% by mass or less of Cu, 0.500% by mass or less of P, and a balance being Bi except for inevitable impurities. The Pb-free solder alloy may further contain 0.03% by mass or more but 0.7% by mass or less of Al.Type: GrantFiled: June 15, 2011Date of Patent: December 1, 2015Assignee: SUMITOMO METAL MINING CO., LTD.Inventors: Hiroaki Nagata, Takashi Iseki, Jiro Taguchi, Masato Takamori
-
Patent number: 9044810Abstract: A rare earth magnet is prepared by disposing a R1-T-B sintered body comprising a R12T14B compound as a major phase in contact with an R2-M alloy powder and effecting heat treatment for causing R2 element to diffuse into the sintered body. The alloy powder is obtained by quenching a melt containing R2 and M. R1 and R2 are rare earth elements, T is Fe and/or Co, M is selected from B, C, P, Al, Si, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, Zr, Nb, Mo, Ag, In, Sn, Sb, Hf, Ta, W, Pt, Au, Pb, and Bi.Type: GrantFiled: June 29, 2010Date of Patent: June 2, 2015Assignee: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Tadao Nomura, Hiroaki Nagata, Takehisa Minowa
-
Publication number: 20150093501Abstract: A rare earth magnet is prepared by disposing a R1-T-B sintered body comprising a R12T14B compound as a major phase in contact with an R2-M alloy powder and effecting heat treatment for causing R2 element to diffuse into the sintered body. The alloy powder is obtained by quenching a melt containing R2 and M. R1 and R2 are rare earth elements, T is Fe and/or Co, M is selected from B, C, P, Al, Si, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, Zr, Nb, Mo, Ag, In, Sn, Sb, Hf, Ta, W, Pt, Au, Pb, and Bi.Type: ApplicationFiled: August 18, 2014Publication date: April 2, 2015Applicant: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Tadao Nomura, Hiroaki Nagata, Takehisa Minowa
-
Publication number: 20140329171Abstract: A new conductive interconnected porous film, useful as a material for a gas diffusion layer which is used in a solid polymer type fuel cell, which satisfies the requirements of a good conductivity, good gas permeability, surface smoothness, corrosion resistance, and low impurities and which is strong in bending and excellent in handling to an extent not obtainable by existing sheet materials of carbon fiber, that is, a conductive interconnected porous film wherein a resin base material part of a thermoplastic resin has a porous interconnected cell structure which is formed by removal of removable particulate matter and has cells of sizes of 10 ?m to 50 ?m and wherein the resin base material part is comprised of different particle size particles of first carbon particles of large size carbon particles of a diameter of 5 ?m or more and second carbon particles of micro size carbon particles of a diameter of 10 nm or more mixed together, and a method of production of the same.Type: ApplicationFiled: November 20, 2012Publication date: November 6, 2014Inventors: Takuzo Imaizumi, Hiroaki Nagata, Naoki Shiba
-
Patent number: 8718493Abstract: A controller for controlling an image forming apparatus having a light detection unit controls at least two operations including: 1) operation of detecting a jam of a recording sheet in a sheet transfer path based on a light intensity level detected by the light detection unit when image forming is performed; and 2) operation of controlling switching of an operation mode of the image forming apparatus to an energy save mode based on a light intensity level detected by the light detection unit.Type: GrantFiled: June 1, 2011Date of Patent: May 6, 2014Assignee: Ricoh Company, Ltd.Inventor: Hiroaki Nagata
-
Publication number: 20130271248Abstract: A rare earth sintered magnet as an anisotropic sintered body comprising Nd2Fe14B crystal phase as primary phase and having the composition R1aTbMcSidBe wherein R1 is a rare earth element inclusive of Sc and Y, T is Fe and/or Co, H is Al, Cu, Zn, In, P, S, Ti, V, Cr, Mn, Ni, Ga, Ge, Zr, Nb, Mo, Pd, Ag, Cd, Sn, Sb, Hf, Ta, or W, “a” to “e” are 12?a?17, 0?c?10, 0.3?d?7, 5?e?10, and the balance of b, wherein Dy and/or Tb is diffused into the sintered body from its surface.Type: ApplicationFiled: April 11, 2013Publication date: October 17, 2013Applicant: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Hiroaki Nagata, Yuuji Gouki, Kazuaki Sakaki, Tadao Nomura, Koichi Hirota, Hajime Nakamura
-
Patent number: 8557057Abstract: A rare earth permanent magnet is prepared by disposing a powdered metal alloy containing at least 70 vol % of an intermetallic compound phase on a sintered body of R—Fe—B system, and heating the sintered body having the powder disposed on its surface below the sintering temperature of the sintered body in vacuum or in an inert gas for diffusion treatment. The advantages include efficient productivity, excellent magnetic performance, a minimal or zero amount of Tb or Dy used, an increased coercive force, and a minimized decline of remanence.Type: GrantFiled: October 27, 2010Date of Patent: October 15, 2013Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Hiroaki Nagata, Tadao Nomura, Takehisa Minowa
-
Publication number: 20130094991Abstract: Disclosed herein is a high-temperature Pb-free solder alloy having the strength required to join electronic parts to a substrate and having excellence in wettability and workability. The high-temperature Pb-free solder alloy contains 0.4% by mass or more but 13.5% by mass or less of Zn, 0.05% by mass or more but 2.0% by mass or less of Cu, 0.500% by mass or less of P, and a balance being Bi except for inevitable impurities. The Pb-free solder alloy may further contain 0.03% by mass or more but 0.7% by mass or less of Al.Type: ApplicationFiled: June 15, 2011Publication date: April 18, 2013Applicant: SUMITOMO METAL MINING CO., LTD.Inventors: Hiroaki Nagata, Takashi Iseki, Jiro Taguchi, Masato Takamori
-
Publication number: 20130033166Abstract: A lighting apparatus includes a light source module, a power supply circuit section supplying power to the light source module, a heat radiating section accommodating the power supply circuit section inside and radiating the heat generated in the power supply circuit section, a base connected to an external power supply, and an insulating ring provided between the heat radiating section and the base and making electrical insulation. With regard to the lighting apparatus, the insulating ring is a thermal conductor. Since the insulating ring functions as the thermal conductor, the heat generated in the power supply circuit section is transferred to the heat radiating section and the base via the insulating ring so that the heat is radiated to outside from the heat radiating section and the base.Type: ApplicationFiled: March 4, 2011Publication date: February 7, 2013Applicant: SHARP KABUSHIKI KAISHAInventors: Yoshiyuki Kitamura, Hiroaki Nagata
-
Publication number: 20120280775Abstract: A sintered magnet body (RaT1bMcBd) coated with a powder mixture of an intermetallic compound R1iM1j, R1xT2yM1z, R1iM1jHk), alloy (M1dM2e)or metal (M1) powder and a rare earth (R2) oxide is diffusion treated. The R2 oxide is partially reduced during the diffusion treatment, so a significant amount of R2 can be introduced near interfaces of primary phase grains within the magnet through the passages in the form of grain boundaries. The coercive force is increased while minimizing a decline of remanence.Type: ApplicationFiled: May 1, 2012Publication date: November 8, 2012Applicant: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Hiroaki Nagata, Tadao Nomura, Takehisa Minowa
-
Patent number: 8277578Abstract: A rare earth permanent magnet is prepared by disposing a powdered metal alloy containing at least 70 vol % of an intermetallic compound phase on a sintered body of R—Fe—B system, and heating the sintered body having the powder disposed on its surface below the sintering temperature of the sintered body in vacuum or in an inert gas for diffusion treatment. The advantages include efficient productivity, excellent magnetic performance, a minimal or zero amount of Tb or Dy used, an increased coercive force, and a minimized decline of remanence.Type: GrantFiled: October 27, 2010Date of Patent: October 2, 2012Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Hiroaki Nagata, Tadao Nomura, Takehisa Minowa
-
Patent number: 8276910Abstract: A document feeder to reverse a document by conveying the document to a reverse path. The document feeder includes a conveyance roller to convey the document, a reverse roller provided along a conveyance path of the document conveyed by the conveyance roller to convey the document to the reverse path by changing a direction of conveyance of the document, and a reverse roller control unit to control the reverse roller to correct skew of the document. The reverse roller control unit controls the reverse roller to correct the skew of the document by striking the document conveyed by the conveyance roller against a nip formed between the reverse roller and a roller provided opposite the reverse roller to temporarily bend the document.Type: GrantFiled: September 22, 2009Date of Patent: October 2, 2012Assignee: Ricoh Company, LimitedInventor: Hiroaki Nagata
-
Patent number: 8252123Abstract: A rare earth permanent magnet is prepared by disposing a powdered metal alloy containing at least 70 vol % of an intermetallic compound phase on a sintered body of R—Fe—B system, and heating the sintered body having the powder disposed on its surface below the sintering temperature of the sintered body in vacuum or in an inert gas for diffusion treatment. The advantages include efficient productivity, excellent magnetic performance, a minimal or zero amount of Tb or Dy used, an increased coercive force, and a minimized decline of remanence.Type: GrantFiled: October 27, 2010Date of Patent: August 28, 2012Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Hiroaki Nagata, Tadao Nomura, Takehisa Minowa