Patents by Inventor Akihiro Ohsawa

Akihiro Ohsawa 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: 20240121497
    Abstract: A small light-emitting device is provided. A light-emitting device which is less likely to produce a shadow is provided. A structure including a switching circuit for supplying a pulsed constant current and a light-emitting panel supplied with the pulsed constant current has been conceived.
    Type: Application
    Filed: December 1, 2023
    Publication date: April 11, 2024
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yoshiharu HIRAKATA, Nobuharu OHSAWA, Hisao IKEDA, Kazuhiko FUJITA, Akihiro KAITA
  • Publication number: 20220199322
    Abstract: Since the cross-sectional area of the plastic deforming portion of the extrusion die gradually decreases from the starting end portion toward the terminal end portion, the pressure applied to the molded body in hot deforming is not loosened, hence, the occurrence of cracks can be effectively suppressed.
    Type: Application
    Filed: December 17, 2021
    Publication date: June 23, 2022
    Applicant: TDK Corporation
    Inventors: Kenichi SUZUKI, Akihiro OHSAWA
  • Patent number: 11363705
    Abstract: An extreme ultraviolet light generation apparatus may include a chamber device, a concentrating mirror, a central gas supply port configured to supply gas along a focal line passing through a first focal point and a second focal point from the center side of the reflection surface, and a first peripheral gas supply port disposed at a peripheral portion of the reflection surface and configured to supply gas in a direction from the outer side of the reflection surface toward the inner side of the reflection surface. The first peripheral gas supply port may supply gas, when viewed along the focal line, in an inclined direction inclined to a tangential direction side of the peripheral portion at the peripheral portion where the first peripheral gas supply port is located with respect to a first straight line passing through the first peripheral gas supply port and the focal line.
    Type: Grant
    Filed: January 22, 2021
    Date of Patent: June 14, 2022
    Assignee: Gigaphoton Inc.
    Inventors: Takayuki Osanai, Atsushi Ueda, Koichiro Koge, Akihiro Ohsawa, Toshiya Shintani, Yoshiaki Yoshida, Yuki Ishida, Yosuke Takada
  • Publication number: 20210298160
    Abstract: An extreme ultraviolet light generation apparatus may include a chamber device, a concentrating mirror, a central gas supply port configured to supply gas along a focal line passing through a first focal point and a second focal point from the center side of the reflection surface, and a first peripheral gas supply port disposed at a peripheral portion of the reflection surface and configured to supply gas in a direction from the outer side of the reflection surface toward the inner side of the reflection surface. The first peripheral gas supply port may supply gas, when viewed along the focal line, in an inclined direction inclined to a tangential direction side of the peripheral portion at the peripheral portion where the first peripheral gas supply port is located with respect to a first straight line passing through the first peripheral gas supply port and the focal line.
    Type: Application
    Filed: January 22, 2021
    Publication date: September 23, 2021
    Applicant: Gigaphoton Inc.
    Inventors: Takayuki OSANAI, Atsushi UEDA, Koichiro KOGE, Akihiro OHSAWA, Toshiya SHINTANI, Yoshiaki YOSHIDA, Yuki ISHIDA, Yosuke TAKADA
  • Publication number: 20190326054
    Abstract: A method for producing a rare earth magnet includes a molding step of supplying a metal powder including a rare earth element into a mold 2 to form a green compact 10; an orientation step of applying a pulse magnetic field H to the green compact 10 held in the mold 2 to orient the metal powder included in the green compact 10; and a sintering step of sintering the green compact 10 separated from the mold 2 after the orientation step. At least one part of the mold 2 is formed from a resin, and the green compact having a density adjusted to 3.0 g/cm3 or more and 4.4 g/cm3 or less is sintered.
    Type: Application
    Filed: November 7, 2017
    Publication date: October 24, 2019
    Applicant: TDK Corporation
    Inventors: Kenichi SUZUKI, Osamu OHHATA, Akihiro OHSAWA
  • Patent number: 10256017
    Abstract: A rare earth based permanent magnet formed by a sintered compact with an R-T-B based composition, wherein, R contains R1 and R2 as the necessity, R1 represents at least one rare earth element including Y and excluding Dy, Tb and Ho, and R2 represents at least one from the group made of Dy, Tb and Ho. Its main phase grains have a core-shell structure in which a core part and shell part coating the core part are contained. When the atom concentrations of R1 and R2 in the core part and the atom concentrations of R1 and R2 in the shell part are defined as ?R1, ?R2, ?R1 and ?R2, respectively, ?R1<?R1, ?R2>?R2, ?R1<?R2 and ?R2<?R1. Relative to all the main phase grains observed at the cross-section of the sintered compact, the ratio occupied by the main phase grain having the core-shell structure is 5% or more.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: April 9, 2019
    Assignee: TDK CORPORATION
    Inventors: Akihiro Ohsawa, Yasushi Enokido
  • Patent number: 10242780
    Abstract: A rare earth based permanent magnet has a sintered compact with R-T-B based composition. The compact has two kinds of main phase grains M1 and M2 having different concentration distributions of R including R1 and R2 respectively representing at least one rare earth element including Y and excluding Dy, Tb and Ho, and at least one from Ho, Dy and Tb. M1 and M2 have a core-shell structure containing a shell part coating a core part. In M1, when the R1 and R2 atom concentrations in the core and shell parts are defined as ?R1, ?R2, ?R1 and ?R2, respectively, ?R1>?R1, ?R2<?R2, ?R1>?R2 and ?R1<?R2. In M2, when the R1 and R2 atom concentrations in the core and shell parts are defined as ?R1, ?R2, ?R1 and ?R2, respectively, ?R1<?R1, ?R2>?R2, ?R1<?R2 and ?R1>?R2. Ratios occupied by the main phase grains having the core-shell structure are 5% or more, respectively.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: March 26, 2019
    Assignee: TDK CORPORATION
    Inventors: Akihiro Ohsawa, Yasushi Enokido
  • Patent number: 10192661
    Abstract: The present invention provides a permanent magnet with both a high corrosion resistance and magnetic properties compared to the existing R-T-B based magnets. It is a R-T-B based sintered magnet (wherein, R includes Y (yttrium) and R1 as essential, R1 is at least one kind of rare earth elements except Y but includes Nd as essential, and T is at least one kind of transition metal element including Fe or the combination of Fe and Co as essential). By allowing the ratio of R1 to Y (R1:Y) in the R contained in the grain boundary phase to be 80:20˜35:65 in terms of the calculated molar ratio of the grain boundary phase and adding Y to the raw materials of the R-T-B based magnet, Y segregates at the triple point, and corrosion of grain boundary phase is prevented by oxidized Y.
    Type: Grant
    Filed: April 22, 2014
    Date of Patent: January 29, 2019
    Assignee: TDK CORPORATION
    Inventors: Yasushi Enokido, Akihiro Ohsawa
  • Patent number: 9528244
    Abstract: A wheel loader is provided with an engine, an engine compartment, a top plate, an injection device, and a duct member. The engine compartment houses the engine. The top plate has a first opening section. The top plate defines the upper surface of the engine compartment. The injection device is disposed inside the engine compartment. The duct member is disposed above the injection device. The duct member is disposed below the first opening section.
    Type: Grant
    Filed: August 19, 2014
    Date of Patent: December 27, 2016
    Assignee: KOMATSU LTD.
    Inventors: Mitsuo Yabe, Akihiro Ohsawa, Toshiya Shintani, Teruyuki Matsuki, Yoshiaki Yoshida
  • Patent number: 9523182
    Abstract: A wheel loader is provided with an engine compartment, a urea water injection device, a second side plate, a guiding member, and a suction part. The second side plate has a first outdoor air intake port. The guiding member is configured to guide outdoor air sucked in through the first outdoor air intake port onto the urea water injection device. The suction part sucks air into the engine compartment. The urea water injection device is disposed within an air flow produced between the suction part and the guiding member.
    Type: Grant
    Filed: March 31, 2014
    Date of Patent: December 20, 2016
    Assignee: KOMATSU LTD.
    Inventors: Mitsuo Yabe, Akihiro Ohsawa, Toshiya Shintani, Teruyuki Matsuki, Yoshiaki Yoshida, Yosuke Yamagoe, Masahiro Tazou, Hiroyuki Kitaoka
  • Publication number: 20160240292
    Abstract: A rare earth based permanent magnet formed by a sintered compact with an R-T-B based composition, wherein, R contains R1 and R2 as the necessity, R1 represents at least one rare earth element including Y and excluding Dy, Tb and Ho, and R2 represents at least one from the group made of Dy, Tb and Ho. Its main phase grains have a core-shell structure in which a core part and shell part coating the core part are contained. When the atom concentrations of R1 and R2 in the core part and the atom concentrations of R1 and R2 in the shell part are defined as ?R1, ?R2, ?R1 and ?R2, respectively, ?R1<?R1, ?R2>?R2, ?R1<?R2 and ?R2<?R1. Relative to all the main phase grains observed at the cross-section of the sintered compact, the ratio occupied by the main phase grain having the core-shell structure is 5% or more.
    Type: Application
    Filed: February 16, 2016
    Publication date: August 18, 2016
    Applicant: TDK CORPORATION
    Inventors: Akihiro OHSAWA, Yasushi ENOKIDO
  • Publication number: 20160237646
    Abstract: A wheel loader is provided with an engine compartment, a urea water injection device, a second side plate a guiding member, and a suction part. The second side plate has a first outdoor air intake port. The guiding member is configured to guide outdoor air sucked in through the first outdoor air intake port onto the urea water injection device. The suction part sucks air into the engine compartment. The urea water injection device is disposed within an air flow produced between the suction part and the guiding member.
    Type: Application
    Filed: March 31, 2014
    Publication date: August 18, 2016
    Inventors: Mitsuo YABE, Akihiro OHSAWA, Toshiya SHINTANI, Teruyuki MATSUKI, Yoshiaki YOSHIDA, Yosuke YAMAGOE, Masahiro TAZOU, Hiroyuki KITAOKA
  • Publication number: 20160240293
    Abstract: A rare earth based permanent magnet has a sintered compact with R-T-B based composition. The compact has two kinds of main phase grains M1 and M2 having different concentration distributions of R including R1 and R2 respectively representing at least one rare earth element including Y and excluding Dy, Tb and Ho, and at least one from Ho, Dy and Tb. M1 and M2 have a core-shell structure containing a shell part coating a core part. In M1, when the R1 and R2 atom concentrations in the core and shell parts are defined as ?R1, ?R2, ?R1 and ?R2, respectively, ?R1>?R1, ?R2<?R2, ?R1>?R2 and ?R1<?R2. In M2, when the R1 and R2 atom concentrations in the core and shell parts are defined as ?R1, ?R2, ?R1 and ?R2, respectively, ?R1<?R1, ?R2>?R2, ?R1<?R2 and ?R1>?R2. Ratios occupied by the main phase grains having the core-shell structure are 5% or more, respectively.
    Type: Application
    Filed: February 16, 2016
    Publication date: August 18, 2016
    Applicant: TDK CORPORATION
    Inventors: Akihiro OHSAWA, Yasushi ENOKIDO
  • Publication number: 20160153173
    Abstract: A wheel loader is provided with an engine, an engine compartment, a top plate, an injection device, and a duct member. The engine compartment houses the engine. The top plate has a first opening section. The top plate defines the upper surface of the engine compartment. The injection device is disposed inside the engine compartment. The duct member is disposed above the injection device. The duct member is disposed below the first opening section.
    Type: Application
    Filed: August 19, 2014
    Publication date: June 2, 2016
    Inventors: Mitsuo YABE, Akihiro OHSAWA, Toshiya SHINTANI, Teruyuki MATSUKI, Yoshiaki YOSHIDA
  • Patent number: 9353503
    Abstract: A wheel loader is provided with an engine compartment, a cooling compartment, a radiator, a cooling fan, a partition wall, a first duct body part, and a top plate. A first end part of the first duct body part is positioned inside the engine compartment. A second end part of the first duct body part is positioned inside the cooling compartment in front of the radiator and the cooling fan. A first outdoor air intake port formed in the top plate is formed in front of the radiator and the cooling fan.
    Type: Grant
    Filed: March 31, 2014
    Date of Patent: May 31, 2016
    Assignee: KOMATSU LTD.
    Inventors: Mitsuo Yabe, Akihiro Ohsawa, Toshiya Shintani, Teruyuki Matsuki, Yoshiaki Yoshida, Yosuke Yamagoe, Masahiro Tazou, Hiroyuki Kitaoka
  • Publication number: 20150337520
    Abstract: A wheel loader is provided with an engine compartment, a cooling compartment, a radiator, a cooling fan, a partition wall, a first duct body part, and a top plate. A first end part of the first duct body part is positioned inside the engine compartment. A second end part of the first duct body part is positioned inside the cooling compartment in front of the radiator and the cooling fan. A first outdoor air intake port formed in the top plate is formed in front of the radiator and the cooling fan.
    Type: Application
    Filed: March 31, 2014
    Publication date: November 26, 2015
    Inventors: Mitsuo YABE, Akihiro OHSAWA, Toshiya SHINTANI, Teruyuki MATSUKI, Yoshiaki YOSHIDA, Yosuke YAMAGOE, Masahiro TAZOU, Hiroyuki KITAOKA
  • Publication number: 20140311288
    Abstract: The present invention provides a permanent magnet with both a high corrosion resistance and magnetic properties compared to the existing R-T-B based magnets. It is a R-T-B based sintered magnet (wherein, R includes Y (yttrium) and R1 as essential, R1 is at least one kind of rare earth elements except Y but includes Nd as essential, and T is at least one kind of transition metal element including Fe or the combination of Fe and Co as essential). By allowing the ratio of R1 to Y (R1:Y) in the R contained in the grain boundary phase to be 80:20˜35:65 in terms of the calculated molar ratio of the grain boundary phase and adding Y to the raw materials of the R-T-B based magnet, Y segregates at the triple point, and corrosion of grain boundary phase is prevented by oxidized Y.
    Type: Application
    Filed: April 22, 2014
    Publication date: October 23, 2014
    Inventors: Yasushi ENOKIDO, Akihiro OHSAWA
  • Publication number: 20140311289
    Abstract: The present invention provides a permanent magnet with both a high corrosion resistance and magnetic properties compared to the existing R-T-B based magnets. It is a R-T-B based sintered magnet (wherein, R includes Y (yttrium) and R1 as essential, R1 is at least one kind of rare earth elements except Y but includes Nd as e essential, and T is one or more kinds of transition metal elements including Fe or the combination of Fe and Co as essential). By allowing the ratio of R1 to Y (R1:Y) in the R to be 80:20˜35:65 according to the molar ratio of the sintered magnet composition, Y segregates at the triple point, and corrosion of grain boundary phase is prevented by oxidizing it.
    Type: Application
    Filed: April 22, 2014
    Publication date: October 23, 2014
    Applicant: TDK CORPORATION
    Inventors: Yasushi ENOKIDO, Akihiro OHSAWA
  • Patent number: 7495542
    Abstract: A film-like temperature sensor for more accurately measuring the temperatures at plural locations on the surface of a semiconductor wafer comprises a base film made of an insulating material; plural thin-film thermal elements for sensing temperature; plural thin-film leads, connected to the thermal elements; and plural thin-film terminals connected to the ends of the leads. The thermal elements, leads, and terminals are integrally formed either on the surface or in the thickness of the base film. The base film has a flat shape like a paddle, and comprises a head portion to be attached to the surface of a semiconductor wafer, and a strip-shaped tail portion extending outwardly of the semiconductor wafer. The plural thermal elements are arranged on the head portion in the form of either a concentric circle, spiral, matrix, or raster, and the plural terminals are arranged on the tail portion.
    Type: Grant
    Filed: August 12, 2005
    Date of Patent: February 24, 2009
    Assignee: Kelk Ltd.
    Inventors: Katsuo Saio, Akihiro Ohsawa
  • Publication number: 20090020263
    Abstract: An apparatus for efficiently cooling the heat of a hot target without enlarging the size of a cooling device or needing either a piping to connect an evaporation portion and a condensation portion or a steam circulation pump. An exoergic-side heat exchanger has a fluid passage for the target fluid, and stores a coolant for cooling the fluid in the fluid passage through heat exchange. An endoergic-side heat exchanger has at least two coolant passages, the one ends of which communicate with the endoergic-side heat exchanger, and the other ends of which communicate with each other through a common coolant passage. A cooling device cools the coolant by exchanging heat with the coolant passing through the exoergic-side heat exchanger. The coolant passage has a diameter or an equivalent diameter within a range of 2 mm to 16 mm, and all the coolant passages have a substantially identical or equivalent diameter.
    Type: Application
    Filed: January 24, 2007
    Publication date: January 22, 2009
    Inventors: Akihiro Ohsawa, Shinji Tsujimura, Rencai Chu, Hikosaburou Hiraki