Patents by Inventor Keiichi Okazaki

Keiichi Okazaki 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: 20200370200
    Abstract: Provided is a method of manufacturing an oriented steel plate having two or more regions in each of which a crystal orientation is arranged in a specific direction. In the method, at least two single crystal steels are brought into contact with a principal surface of a polycrystalline steel plate so that crystal orientations of the single crystal steels and are arranged in different directions, and heat treatment of the single crystal steels and the polycrystalline steel plate is performed. This causes crystal growth following the crystal orientations of the single crystal steels to occur in the polycrystalline steel plate. Then, two or more single crystal steels having different crystal orientations are formed in the polycrystalline steel plate.
    Type: Application
    Filed: May 22, 2020
    Publication date: November 26, 2020
    Inventors: Hiroki TAKAHASHI, Satoshi DOI, Keiichi OKAZAKI, Hidemasa OTSUBO, Yutaro SUGIMOTO, Jun YANAGIMOTO
  • Patent number: 10749416
    Abstract: A method is for manufacturing a core plate having an annular core back and teeth extending from the core back toward the center. The core plate is obtained by performing a punching step, a winding step, a straining step and an annealing step. At the straining step, compressive strain is applied to the core back or the band-shaped core back that is to be the core back after winding. At the annealing step, the core back or the band-shaped core back is annealed to be recrystallized after the applying of strain.
    Type: Grant
    Filed: January 17, 2019
    Date of Patent: August 18, 2020
    Assignees: DENSO CORPORATION, NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Tetsuya Aoki, Takeshi Senoo, Keiichi Okazaki, Satoshi Doi, Hiroshi Fujimura, Hiroaki Sato
  • Publication number: 20200234870
    Abstract: Disclosed are a core sheet and a manufacturing method thereof. The core sheet has an annular core back portion and a plurality of tooth portions extending from the core back portion toward a radial center thereof. The core sheet is obtained by performing a blanking step, a rolling step and a removing step. In the removing step, an insulation coating, which is on a region of a grain-oriented magnetic steel sheet for forming a band-shaped core back portion, on a band-shaped core back portion of a sheet piece or on the core back portion of the core sheet, is at least partially removed.
    Type: Application
    Filed: March 31, 2020
    Publication date: July 23, 2020
    Inventors: Tetsuya AOKI, Makoto TANIGUCHI, Atsuo ISHIZUKA, Satoshi DOI, Keiichi OKAZAKI, Hiroshi FUJIMURA, Tatsuya TAKASE
  • Publication number: 20190149021
    Abstract: A method is for manufacturing a core plate having an annular core back and teeth extending from the core back toward the center. The core plate is obtained by performing a punching step, a winding step, a straining step and an annealing step. At the straining step, compressive strain is applied to the core back or the band-shaped core back that is to be the core back after winding. At the annealing step, the core back or the band-shaped core back is annealed to be recrystallized after the applying of strain.
    Type: Application
    Filed: January 17, 2019
    Publication date: May 16, 2019
    Inventors: Tetsuya AOKI, Takeshi SENOO, Keiichi OKAZAKI, Satoshi DOI, Hiroshi FUJIMURA, Hiroaki SATO
  • Patent number: 8227091
    Abstract: Disclosed is an aluminum alloy brazing sheet for heat exchangers, which has high strength after brazing, high corrosion resistance and excellent brazability. Specifically disclosed is an aluminum alloy brazing sheet (1a) for heat exchangers comprising a core member (2), a sacrificial member (3) formed on one side of the core member (2), and a brazing filler metal (4) formed on the other side of the core member (2) and composed of an Al—Si alloy. The sacrificial member (3) contains 0.03-0.30% by mass of Fe, 0.01-0.40% by mass of Mn, 0.4-1.4% by mass of Si, 2.0-5.5% by mass of Zn, not more than 0.05% by mass of Mg and the balance of Al and unavoidable impurities. In addition, the sacrificial member (3) has a crystal grain size of 100-400 & mgr;m after 5-minute heat treatment at 600 & ring;C during the brazing.
    Type: Grant
    Filed: December 18, 2007
    Date of Patent: July 24, 2012
    Assignees: Kobe Steel, Ltd., Denso Corporation
    Inventors: Toshiki Ueda, Akihiro Tsuruno, Fumihiro Koshigoe, Keiichi Okazaki, Takahiko Nagaya, Kenji Negura
  • Patent number: 8142907
    Abstract: An aluminum alloy brazing sheet having high strength comprising: a core alloy; an Al—Si-based filler alloy cladded on one side or both sides of the core alloy, wherein the core alloy is composed of an aluminum alloy containing 0.3-1.2% (mass %, the same applies the below) Si, 0.05-0.4% Fe, 0.3-1.2% Cu, 0.3-1.8% Mn, 0.05-0.6% Mg, and containing one or more elements selected from the group consisting of 0.02-0.3% Ti, 0.02-0.3% Zr, 0.02-0.3% Cr and 0.02-0.3% V, the balance of Al and unavoidable impurities; and wherein, after the aluminum alloy brazing sheet is subjected to brazing, the core alloy features a metallic structure in which a density of intermetallic compounds having a grain diameter of at least 0.1 ?m is at most ten grains per ?m2.
    Type: Grant
    Filed: July 15, 2008
    Date of Patent: March 27, 2012
    Assignees: Furukawa-sky Aluminum Corp, Denso Corporation
    Inventors: Atsushi Fukumoto, Hiroshi Kano, Akio Niikura, Yoichiro Bekki, Kenji Negura, Tatsuo Ozaki, Toshihide Ninagawa, Keiichi Okazaki
  • Patent number: 7771839
    Abstract: An aluminum alloy brazing sheet which has a clad of a sacrificial anode material/a core alloy/an intermediate material/a filler alloy, wherein number density ratios N1/N2 and N1/N3 each are 1.5 or more, in which a number density ((the number of grains)/?m3) of an intermetallic compound having a sphere-equivalent grain diameter of 0.1 ?m or less present in the core alloy, the intermediate material, and the sacrificial anode material, is represented by N1, N2, and N3, respectively.
    Type: Grant
    Filed: December 6, 2006
    Date of Patent: August 10, 2010
    Assignees: Furukawa-Sky Aluminum Corp., Denso Corporation
    Inventors: Atsushi Fukumoto, Akio Niikura, Kenji Negura, Keiichi Okazaki, Tatsuo Ozaki, Toshihide Ninagawa
  • Publication number: 20100112370
    Abstract: Disclosed is an aluminum alloy brazing sheet for heat exchangers, which has high strength after brazing, high corrosion resistance and excellent brazability. Specifically disclosed is an aluminum alloy brazing sheet (1a) for heat exchangers comprising a core member (2), a sacrificial member (3) formed on one side of the core member (2), and a brazing filler metal (4) formed on the other side of the core member (2) and composed of an Al—Si alloy. The sacrificial member (3) contains 0.03-0.30% by mass of Fe, 0.01-0.40% by mass of Mn, 0.4-1.4% by mass of Si, 2.0-5.5% by mass of Zn, not more than 0.05% by mass of Mg and the balance of Al and unavoidable impurities. In addition, the sacrificial member (3) has a crystal grain size of 100-400 & mgr;m after 5-minute heat treatment at 600 & ring;C during the brazing.
    Type: Application
    Filed: December 18, 2007
    Publication date: May 6, 2010
    Applicants: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.), DENSO CORPORATION
    Inventors: Toshiki Ueda, Akihiro Tsuruno, Fumihiro Koshigoe, Keiichi Okazaki, Takahiko Nagaya, Kenji Negura
  • Publication number: 20090020585
    Abstract: An aluminum alloy brazing sheet having high strength comprising: a core alloy; an Al—Si-based filler alloy cladded on one side or both sides of the core alloy, wherein the core alloy is composed of an aluminum alloy containing 0.3-1.2% (mass %, the same applies the below) Si, 0.05-0.4% Fe, 0.3-1.2% Cu, 0.3-1.8% Mn, 0.05-0.6% Mg, and containing one or more elements selected from the group consisting of 0.02-0.3% Ti, 0.02-0.3% Zr, 0.02-0.3% Cr and 0.02-0.3% V, the balance of Al and unavoidable impurities; and wherein, after the aluminum alloy brazing sheet is subjected to brazing, the core alloy features a metallic structure in which a density of intermetallic compounds having a grain diameter of at least 0.1 ?m is at most ten grains per ?m2.
    Type: Application
    Filed: July 15, 2008
    Publication date: January 22, 2009
    Applicants: Furukawa-Sky Aluminum Corp., Denso Corporation
    Inventors: Atsushi Fukumoto, Hiroshi Kano, Akio Niikura, Yoichiro Bekki, Kenji Negura, Tatsuo Ozaki, Toshihide Ninagawa, Keiichi Okazaki
  • Publication number: 20070166565
    Abstract: An aluminum alloy brazing sheet which has a clad of a sacrificial anode material/a core alloy/an intermediate material/a filler alloy, wherein number density ratios N1/N2 and N1/N3 each are 1.5 or more, in which a number density ((the number of grains)/?m3) of an intermetallic compound having a sphere-equivalent grain diameter of 0.1 ?m or less present in the core alloy, the intermediate material, and the sacrificial anode material, is represented by N1, N2, and N3, respectively.
    Type: Application
    Filed: December 6, 2006
    Publication date: July 19, 2007
    Applicants: FURUKAWA-SKY ALUMINUM CORP., DENSO CORPORATION
    Inventors: Atsushi FUKUMOTO, Akio Niikura, Kenji Negura, Keiichi Okazaki, Tatsuo Ozaki, Toshihide Ninagawa
  • Publication number: 20060093744
    Abstract: A process for providing a coating on a surface of a substrate made of magnesium or magnesium alloy has a step of heating the substrate in a humidified atmosphere therein. It is desirable that the atmosphere has a temperature between 50 and 450 degrees centigrade and a relative humidity between 50 and 100%. It is also desirable that the atmosphere has a pressure between 1.0×105 and 1.0×106 Pa. Further, it is desirable that a thickness of the coating is between 3 and 50 ?m. The surface treatment process is suitable for forming a vehicular part such as an ECU case.
    Type: Application
    Filed: July 8, 2005
    Publication date: May 4, 2006
    Applicant: DENSO Corporation
    Inventors: Hideyuki Suzuki, Koichiro Sato, Keiichi Okazaki, Tomoko Ito, Hiroshi Kawaguchi
  • Publication number: 20060008587
    Abstract: A process for providing a coating on a surface of a substrate made of magnesium or magnesium alloy has a step of heating the substrate in a humidified atmosphere therein. It is desirable that the atmosphere has a temperature between 50 and 450 degrees centigrade and a relative humidity between 50 and 100%. It is also desirable that the atmosphere has a pressure between 1.0×105 and 1.0×106 Pa. Further, it is desirable that a thickness of the coating is between 3 and 50 ?m. The surface treatment process is suitable for forming a vehicular part such as an ECU case.
    Type: Application
    Filed: July 7, 2005
    Publication date: January 12, 2006
    Applicant: DENSO Corporation
    Inventors: Hideyuki Suzuki, Koichiro Sato, Keiichi Okazaki, Tomoko Ito, Hiroshi Kawaguchi
  • Patent number: 6252482
    Abstract: A high voltage post terminal is accurately located within a support aperture during manufacturing processes by at least one inwardly directed projection to avoid assembly problems caused by sizing the entire aperture itself to locate the terminal with sufficient accuracy. By thus improving the concentricity of the high voltage coil components it is possible to achieve more reliable insulation between components at even relatively small-sized coils used for individual engine plug holes. An especially advantageous range of critical parameters has been discovered as achievable by using this more reliable manufacturing process.
    Type: Grant
    Filed: December 10, 1998
    Date of Patent: June 26, 2001
    Assignee: Denso Corporation
    Inventors: Tomonari Chiba, Kazutoyo Oosuka, Keiichi Okazaki, Hiromitsu Oonishi, Masahiko Aoyama
  • Patent number: 5996554
    Abstract: A throttle valve control device is composed of a stator core with a solenoid and a rotor carrying a throttle valve. The rotor has a pair of poles which is composed of one or a plurality of rare-earth-metal permanent magnets magnetized in the radial thickness direction. The stator core has an inner periphery sorounding the rotor, and the inner periphery is smooth with no slot so that uniform distribution of magnetic flux can be formed in the inner periphery, thereby reducing the detent torque.
    Type: Grant
    Filed: February 12, 1998
    Date of Patent: December 7, 1999
    Assignee: Denso Corporation
    Inventors: Eiichi Tojo, Hideki Kato, Hazime Akado, Hiromitsu Ohnishi, Yuichiro Miura, Keiichi Okazaki