Patents by Inventor Yasunaga Itoh

Yasunaga Itoh 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: 11828293
    Abstract: A closed impeller (1) includes an impeller main body (2), which is composed of an aluminum alloy and has blades (22) that protrude from a hub (21). A shroud (3) covers the blades. The blades and the shroud are joined together by brazed joints (4). The shroud (3) is formed from a brazing sheet (30) that comprises a core material (31), which is composed of an aluminum alloy, and a filler material layer (320), which is disposed on an outermost surface (33) of the shroud that opposes or faces the blades when the shroud is brazed to the blades.
    Type: Grant
    Filed: November 26, 2019
    Date of Patent: November 28, 2023
    Assignees: DAIKIN INDUSTRIES, LTD, UACJ CORPORATION
    Inventors: Tadashi Okada, Kosuke Nishimura, Kaoru Ueda, Yasunaga Itoh
  • Patent number: 11298779
    Abstract: A brazing sheet brazing suitable for brazing performed in an inert gas atmosphere or in a vacuum without using a flux has a three-layer composition. An aluminum alloy core material contains Mg: 1.3 mass % or less. An aluminum alloy intermediate material is layered on the core material and contains Mg: 0.40-6.0 mass %. An aluminum alloy filler material is layered on the intermediate material and contains Si: 6.0-13.0 mass %, Bi: 0.0040-0.070 mass %, and Mg: 0.050-0.10 mass %.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: April 12, 2022
    Assignee: UACJ CORPORATION
    Inventor: Yasunaga Itoh
  • Publication number: 20220025898
    Abstract: A closed impeller (1) includes an impeller main body (2), which is composed of an aluminum alloy and has blades (22) that protrude from a hub (21). A shroud (3) covers the blades. The blades and the shroud are joined together by brazed joints (4). The shroud (3) is formed from a brazing sheet (30) that comprises a core material (31), which is composed of an aluminum alloy, and a filler material layer (320), which is disposed on on an outermost surface (33) of the shroud that opposes or faces the blades when the shroud is brazed to the blades.
    Type: Application
    Filed: November 26, 2019
    Publication date: January 27, 2022
    Inventors: Tadashi OKADA, Kosuke NISHIMURA, Kaoru UEDA, Yasunaga ITOH
  • Patent number: 11007609
    Abstract: A brazing sheet brazing suitable for brazing performed in an inert gas atmosphere or in a vacuum without using a flux includes a filler layered on a core. The core is composed of an aluminum alloy containing 0.20-1.3 mass % Mg. The filler is composed of an aluminum alloy containing Si: 6.0-13.0 mass % Si, 0.0040-0.070 mass % Bi, and 0.051-0.10 mass % Mg.
    Type: Grant
    Filed: July 24, 2017
    Date of Patent: May 18, 2021
    Assignee: UACJ CORPORATION
    Inventors: Yasunaga Itoh, Tomoki Yamayoshi
  • Patent number: 10857629
    Abstract: An aluminum alloy brazing sheet is disclosed including a core material made of pure aluminum or aluminum alloy, one side or both sides of the core material, being clad with a brazing material, with an intermediate material interposed between the core material and the brazing material, the intermediate material including 0.4 to 6 mass % of Mg, further including at least one of Mn, Cr, and Zr, and the balance being Al and inevitable impurities, having the Mn content not more than 2.0 mass %, the Cr content not more than 0.3 mass %, and the Zr content not more than 0.3 mass %, with the total content of Mn, Cr, and Zr being at least 0.1 mass %, the brazing material including 4 to 13 mass % of Si, and the balance being Al and inevitable.
    Type: Grant
    Filed: August 24, 2017
    Date of Patent: December 8, 2020
    Assignee: UACJ Corporation
    Inventors: Atsushi Fukumoto, Yasunaga Itoh, Shoichi Sakoda, Tomoki Yamayoshi
  • Publication number: 20200338671
    Abstract: A brazing sheet brazing suitable for brazing performed in an inert gas atmosphere or in a vacuum without using a flux has a three-layer composition. An aluminum alloy core material contains Mg: 1.3 mass % or less. An aluminum alloy intermediate material is layered on the core material and contains Mg: 0.40-6.0 mass %. An aluminum alloy filler material is layered on the intermediate material and contains Si: 6.0-13.0 mass %, Bi: 0.0040-0.070 mass %, and Mg: 0.050-0.10 mass %.
    Type: Application
    Filed: November 6, 2018
    Publication date: October 29, 2020
    Inventor: Yasunaga ITOH
  • Patent number: 10737357
    Abstract: A brazing sheet is provided for use in brazing performed in an inert gas atmosphere both using flux and without using flux. The brazing sheet includes an aluminum-based core, an intermediate material layered on the core and being composed of an aluminum alloy that contains Mg: 0.40-3.0 mass %, and a filler metal layered on the intermediate material and being composed of an aluminum alloy that contains Si: 6.0-13.0 mass % and Mg: less than 0.050 mass %. The brazing sheet satisfies the formula below where M [mass %] is the Mg content in the intermediate material, ti [?m] is the thickness of the intermediate material, and tf [?m] is the thickness of the filler metal: tf?10.15×ln(M×ti)+3.7.
    Type: Grant
    Filed: May 24, 2017
    Date of Patent: August 11, 2020
    Assignee: UACJ CORPORATION
    Inventors: Yasunaga Itoh, Shoichi Sakoda, Atsushi Fukumoto
  • Patent number: 10682730
    Abstract: An aluminum alloy brazing sheet used for brazing aluminum, without using a flux, in an inert gas atmosphere or vacuum is formed by arranging a brazing material on one side or both sides of a core material made of pure aluminum or aluminum alloy, the brazing material including 6% to 13% by mass of Si and the balance being Al and inevitable impurities, and performing cladding with an intermediate material interposed between the core material and the brazing material, the intermediate material including 0.01% to 1.5% by mass of Bi, 1.5% to 13% by mass of Si, and the balance being Al and inevitable impurities, the intermediate material having a thickness of 2% to 35% of a thickness of the brazing material, wherein one or both of the intermediate material and the core material includes 0.4% to 6% by mass of Mg.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: June 16, 2020
    Assignee: UACJ CORPORATION
    Inventors: Yasunaga Itoh, Tomoki Yamayoshi, Yutaka Yanagawa
  • Patent number: 10661395
    Abstract: A brazing sheet for brazing in an inert-gas atmosphere without using a flux has a core and a filler material clad to one side or both sides of the core. The core has a chemical composition that contains Mg: 0.35-0.8% (mass %; likewise hereinbelow), the remainder being composed of Al and unavoidable impurities. The filler material has a chemical composition that contains Si: 6-13% and Bi: 0.001-0.05% and Mg: limited less than 0.05%, the remainder being composed of Al and unavoidable impurities.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: May 26, 2020
    Assignee: UACJ CORPORATION
    Inventors: Junichi Ichikawa, Tomoki Yamayoshi, Yasunaga Itoh, Yutaka Yanagawa
  • Publication number: 20200061758
    Abstract: A brazing sheet brazing suitable for brazing performed in an inert gas atmosphere or in a vacuum without using a flux includes a filler layered on a core. The core is composed of an aluminum alloy containing 0.20-1.3 mass % Mg. The filler is composed of an aluminum alloy containing Si: 6.0-13.0 mass % Si, 0.0040-0.070 mass % Bi, and 0.051-0.10 mass % Mg.
    Type: Application
    Filed: July 24, 2017
    Publication date: February 27, 2020
    Inventors: Yasunaga ITOH, Tomoki YAMAYOSHI
  • Publication number: 20190314916
    Abstract: Provided are a brazing furnace (1) and a brazing method in which brazing-joint quality can be easily stabilized in brazing with a reduced applied-amount of flux or in brazing without using flux. The brazing furnace (1) is configured to be used for brazing an object to be processed (100) composed of an aluminum material. The brazing furnace (1) includes a brazing chamber (2) equipped with heating apparatuses (21) that heat the object to be processed (100) to the brazing temperature, an inert gas supply apparatus (3) that supplies an inert gas in to the brazing chamber (2), and a dehumidifying apparatus (4) that is interposed between the inert gas supply apparatus (3) and the brazing chamber (2) and performs dehumidification of the inert gas.
    Type: Application
    Filed: November 28, 2017
    Publication date: October 17, 2019
    Inventors: Yasunaga ITOH, Shoichi SAKODA
  • Publication number: 20190291218
    Abstract: A brazing sheet is provided for use in brazing performed in an inert gas atmosphere both using flux and without using flux. The brazing sheet includes an aluminum-based core, an intermediate material layered on the core and being composed of an aluminum alloy that contains Mg: 0.40-3.0 mass %, and a filler metal layered on the intermediate material and being composed of an aluminum alloy that contains Si: 6.0-13.0 mass % and Mg: less than 0.050 mass %. The brazing sheet satisfies the formula below where M [mass %] is the Mg content in the intermediate material, ti [?m] is the thickness of the intermediate material, and tf [?m] is the thickness of the filler metal: tf?10.15×ln(M×ti)+3.7.
    Type: Application
    Filed: May 24, 2017
    Publication date: September 26, 2019
    Inventors: Yasunaga ITOH, Shoichi SAKODA, Atsushi FUKUMOTO
  • Publication number: 20190184501
    Abstract: An aluminum alloy brazing sheet is disclosed including a core material made of pure aluminum or aluminum alloy, one side or both sides of the core material, being clad with a brazing material, with an intermediate material interposed between the core material and the brazing material, the intermediate material including 0.4 to 6 mass % of Mg, further including at least one of Mn, Cr, and Zr, and the balance being Al and inevitable impurities, having the Mn content not more than 2.0 mass %, the Cr content not more than 0.3 mass %, and the Zr content not more than 0.3 mass %, with the total content of Mn, Cr, and Zr being at least 0.1 mass %, the brazing material including 4 to 13 mass % of Si, and the balance being Al and inevitable.
    Type: Application
    Filed: August 24, 2017
    Publication date: June 20, 2019
    Applicant: UACJ Corporation
    Inventors: Atsushi Fukumoto, Yasunaga Itoh, Shoichi Sakoda, Tomoki Yamayoshi
  • Patent number: 10307813
    Abstract: An aluminum alloy heat exchanger is produced by applying a coating material that is prepared by adding a binder to a mixture of an Si powder and a Zn-containing compound flux powder to a surface of an aluminum alloy refrigerant tube, assembling a bare fin that is formed of an Al—Mn—Zn alloy with the refrigerant tube, and brazing the refrigerant tube and the bare fin by heating in an atmosphere-controlled furnace, the refrigerant tube being an extruded product of an aluminum alloy that comprises 0.5 to 1.7% (mass %, hereinafter the same) of Mn, less than 0.10% of Cu, and less than 0.10% of Si, with the balance being Al and unavoidable impurities.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: June 4, 2019
    Assignee: SUMITOMO LIGHT METAL INDUSTRIES, LTD.
    Inventors: Naoki Yamashita, Yasunaga Itoh, Yuji Hisatomi
  • Patent number: 10307870
    Abstract: An aluminum alloy brazing sheet achieves a stable brazability equal to by brazing using a flux, even if an etching treatment is not performed on the brazing site. The aluminum alloy brazing sheet is used to braze aluminum in an inert gas atmosphere without using a flux and includes a core material and a filler metal, one side or each side of the core material being clad with the filler metal, the core material being formed of an aluminum alloy that includes 0.2 to 1.3 mass % of Mg, the filler metal including 6 to 13 mass % of Si and 0.004 to 0.1 mass % of Li, with the balance being aluminum and unavoidable impurities, a surface oxide film having been removed from the brazing sheet, and an oil solution that decomposes when heated at 380° C. or less in an inert gas having been applied to the brazing sheet.
    Type: Grant
    Filed: February 9, 2017
    Date of Patent: June 4, 2019
    Assignee: UACJ CORPORATION
    Inventors: Yasunaga Itoh, Tomoki Yamayoshi
  • Patent number: 10300563
    Abstract: An aluminum alloy brazing sheet exhibits excellent brazability by effectively weakening an oxide film formed on the surface of a filler metal. The aluminum alloy brazing sheet includes a core material and a filler metal, and is used to braze aluminum in an inert gas atmosphere or in vacuum, the core material including aluminum or an aluminum alloy, the filler metal including 6 to 13 mass % of Si, with the balance being Al and unavoidable impurities, and one side or each side of the core material being clad with the filler metal, wherein the core material is clad with the filler metal in a state in which a sheet material is interposed between the core material and the filler metal, the sheet material including one element, or two or more elements, among 0.05 mass % or more of Li, 0.05 mass % or more of Be, 0.05 mass % or more of Ba, and 0.05 mass % or more of Ca, with the balance being Al and unavoidable impurities.
    Type: Grant
    Filed: August 19, 2015
    Date of Patent: May 28, 2019
    Assignee: UACJ CORPORATION
    Inventors: Yasunaga Itoh, Tomoki Yamayoshi
  • Publication number: 20190151973
    Abstract: An aluminum alloy brazing sheet used for brazing in an inert gas atmosphere without using flux is provided. In the aluminum alloy brazing sheet, a brazing material formed of aluminum alloy including Si of 6 mass % to 13 mass % with the balance being Al and inevitable impurities clads one side surface or both side surfaces of a core material formed of aluminum alloy including Mn of 0.8 mass % to 1.8 mass %, and Mg of 0.05 mass % to 0.20 mass % with the balance being Al and inevitable impurities, the brazing sheet has a thickness of 0.12 mm or smaller, and the brazing material has a thickness of 0.012 mm or smaller. This structure provides an aluminum alloy brazing sheet for fluxless brazing causing no defectiveness of buckling of distal end portions of fins or unsound formation of a fillet in brazing heating.
    Type: Application
    Filed: November 28, 2016
    Publication date: May 23, 2019
    Applicants: UACJ Corporation, DENSO CORPORATION
    Inventors: Yasunaga Itoh, Tomoki Yamayoshi, Shingo Oono, Tomohiro Shimazu, Shin Takewaka
  • Patent number: 10150186
    Abstract: A hollow aluminum structure that will be brazed includes at least one brazing sheet having a filler metal layer clad onto a core layer. The core layer is composed of aluminum or an aluminum alloy containing less than 0.2 mass % Mg. The filler metal layer is composed of an aluminum alloy that contains Si: 4.0-13.0 mass % and Bi: 0.01-0.3 mass %, and further contains Li: 0.004-0.08 mass % and/or Be: 0.006-0.12 mass %, the filler metal layer containing less than 0.1 mass % Mg. The hollow aluminum structure is assembled such that the filler metal layer is present at locations that will form both an interior-facing brazed joint and an exterior-facing brazed joint. Then, flux is applied onto the filler metal layer at the location that will form the exterior brazed joint, and the hollow aluminum structure heated in an inert gas atmosphere to form the interior brazed joint and the exterior brazed joint.
    Type: Grant
    Filed: November 13, 2015
    Date of Patent: December 11, 2018
    Assignee: UACJ CORPORATION
    Inventors: Yutaka Yanagawa, Yasunaga Itoh, Tomoki Yamayoshi
  • Publication number: 20180290245
    Abstract: An aluminum alloy clad material includes a core material that is made of an aluminum alloy containing Mg at a concentration of 0.2 to 2.0% (mass %; the same applies below), with the balance being Al and unavoidable impurities, and has one side or two sides cladded with a surface-layer material made of pure aluminum containing Mg having a limited concentration of lower than 0.1%. In addition, an aluminum alloy clad material includes a core material that is made of aluminum or an aluminum alloy, and has one side or two sides cladded with a surface-layer material made of pure aluminum containing Mg having a limited concentration of lower than 0.1%, via an interlayer material made of an aluminum alloy containing Mg at a concentration of 0.3 to 2.0%, with the balance being Al and unavoidable impurities.
    Type: Application
    Filed: May 23, 2016
    Publication date: October 11, 2018
    Applicant: UACJ Corporation
    Inventors: Yasunaga Itoh, Shoichi Sakoda, Tomoki Yamayoshi, Yutaka Yanagawa
  • Publication number: 20180214964
    Abstract: A brazing method includes shaping a clad sheet to form a hollow structure. A tube is then partially inserted into a through hole in the hollow structure, thereby forming an assembled aluminum structure. The exterior surface of the hollow structure adjacent the through hole is composed of an Al—Si alloy that serves as a first filler material. The interior surface of the hollow structure adjacent the through hole is composed of an Al—Si alloy containing at least one of Cu and Zn and having a solidus temperature of 570° C. or less that serves as a second filler material. The assembled aluminum structure is brazed by heating it in an inert-gas atmosphere such that fillets joining the hollow structure to the tube along the through hole are formed first on the interior surface of the hollow structure and then on the exterior surface of the hollow structure.
    Type: Application
    Filed: May 18, 2016
    Publication date: August 2, 2018
    Inventors: Yasunaga ITOH, Yutaka YANAGAWA, Tomoki YAMAYOSHI, Junji NINOMIYA, Tsubasa YANAGIMOTO