Patents by Inventor Kazutaka Okamoto

Kazutaka Okamoto 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: 10913680
    Abstract: The purpose of the present invention is to provide a lead-free glass composition in which crystallization is suppressed and which has a low softening point. This lead-free glass composition is characterized by containing silver oxide, tellurium oxide and vanadium oxide, and further containing at least one compound selected from among yttrium oxide, lanthanum oxide, cerium oxide, erbium oxide, ytterbium oxide, aluminum oxide, gallium oxide, indium oxide, iron oxide, tungsten oxide and molybdenum oxide as an additional component, and in that the content values (mol %) of silver oxide, tellurium oxide and vanadium oxide satisfy the relationships Ag2O>TeO2?V2O5 and Ag5O?2V2O5 when calculated in terms of the oxides, and in that the content of TeO2 is 25-37 mol. %.
    Type: Grant
    Filed: January 11, 2017
    Date of Patent: February 9, 2021
    Assignee: HITACHI, LTD.
    Inventors: Takashi Naito, Takuya Aoyagi, Tatsuya Miyake, Takeshi Kondo, Hiroki Kaneko, Kazutaka Okamoto
  • Patent number: 10804624
    Abstract: The present invention provides a joint portion of MgB2 superconducting wires having exceptional energization characteristics and high reliability. The joint portion of the superconducting wires according to the present invention has a space for filling Mg into a portion inside a container or pressurizing member, the portion not being adjacent to an MgB2 sintered body.
    Type: Grant
    Filed: May 12, 2017
    Date of Patent: October 13, 2020
    Assignee: Hitachi, Ltd.
    Inventors: Yota Ichiki, Kazutaka Okamoto
  • Publication number: 20190207331
    Abstract: The present invention provides a joint portion of MgB2 superconducting wires having exceptional energization characteristics and high reliability. The joint portion of the superconducting wires according to the present invention has a space for filling Mg into a portion inside a container or pressurizing member, the portion not being adjacent to an MgB2 sintered body.
    Type: Application
    Filed: May 12, 2017
    Publication date: July 4, 2019
    Inventors: Yota ICHIKI, Kazutaka OKAMOTO
  • Publication number: 20180354843
    Abstract: The purpose of the present invention is to provide a lead-free glass composition in which crystallization is suppressed and which has a low softening point. This lead-free glass composition is characterized by containing silver oxide, tellurium oxide and vanadium oxide, and further containing at least one compound selected from among yttrium oxide, lanthanum oxide, cerium oxide, erbium oxide, ytterbium oxide, aluminum oxide, gallium oxide, indium oxide, iron oxide, tungsten oxide and molybdenum oxide as an additional component, and in that the content values (mol %) of silver oxide, tellurium oxide and vanadium oxide satisfy the relationships Ag2O>TeO2?V2O5 and Ag5O?2V2O5 when calculated in terms of the oxides, and in that the content of TeO2 is 25-37 mol. %.
    Type: Application
    Filed: January 11, 2017
    Publication date: December 13, 2018
    Applicant: HITACHI, LTD.
    Inventors: Takashi NAITO, Takuya AOYAGI, Tatsuya MIYAKE, Takeshi KONDO, Hiroki KANEKO, Kazutaka OKAMOTO
  • Patent number: 10132941
    Abstract: A radiation detector includes a Peltier device (electronic cooling unit) for cooling a radiation detecting element, and a heat releasing part of the Peltier device is in thermal contact with a cold finger (thermally conductive part). The cold finger is made of a material with higher thermal conductivity than that of the base, and penetrates the base. The heat from the radiation detecting element is conducted from the heat releasing part of the Peltier device to the cold finger, and is dissipated to an area outside of the radiation detector through the cold finger. As such, heat is efficiently dissipated from the radiation detecting element.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: November 20, 2018
    Assignee: HORIBA, LTD.
    Inventors: Kengo Yasui, Kazutaka Okamoto, Shuji Takada
  • Publication number: 20180120456
    Abstract: A radiation detector includes a Peltier device (electronic cooling unit) for cooling a radiation detecting element, and a heat releasing part of the Peltier device is in thermal contact with a cold finger (thermally conductive part). The cold finger is made of a material with higher thermal conductivity than that of the base, and penetrates the base. The heat from the radiation detecting element is conducted from the heat releasing part of the Peltier device to the cold finger, and is dissipated to an area outside of the radiation detector through the cold finger. As such, heat is efficiently dissipated from the radiation detecting element.
    Type: Application
    Filed: December 27, 2017
    Publication date: May 3, 2018
    Inventors: Kengo Yasui, Kazutaka Okamoto, Shuji Takada
  • Patent number: 9857483
    Abstract: A radiation detector 1 includes a Peltier device (electronic cooling unit) for cooling a radiation detecting element, and the heat releasing part of the Peltier device is in thermal contact with a cold finger (thermally conductive part). The cold finger is made of a material with higher thermal conductivity than that of the base, and penetrates the base. The heat from the radiation detecting element is conducted from the heat releasing part of the Peltier device to the cold finger, and is dissipated to the outside of the radiation detector through the cold finger. As such, heat is efficiently dissipated from the radiation detecting element.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: January 2, 2018
    Assignee: HORIBA, LTD.
    Inventors: Kengo Yasui, Kazutaka Okamoto, Shuji Takada
  • Publication number: 20160313455
    Abstract: A radiation detector 1 includes a Peltier device (electronic cooling unit) for cooling a radiation detecting element, and the heat releasing part of the Peltier device is in thermal contact with a cold finger (thermally conductive part). The cold finger is made of a material with higher thermal conductivity than that of the base, and penetrates the base. The heat from the radiation detecting element is conducted from the heat releasing part of the Peltier device to the cold finger, and is dissipated to the outside of the radiation detector through the cold finger. As such, heat is efficiently dissipated from the radiation detecting element.
    Type: Application
    Filed: April 22, 2016
    Publication date: October 27, 2016
    Inventors: Kengo YASUI, Kazutaka OKAMOTO, Shuji TAKADA
  • Patent number: 9090965
    Abstract: There is provided a slide part used in an environment where there is a lubricant containing a molybdenum compound including a hard protective layer formed on an outermost surface of a substrate of the slide part; in which: the hard protective layer includes mainly carbon, nitrogen, and a metal element; the hard protective layer is composed of a complex of an amorphous carbon body containing nitrogen and a compound crystal of the metal element; the compound crystal is composed of at least one of a metal carbide, a metal nitride, and a metal carbonitride; and a surface hardness of the hard protective layer is 1800 or larger in Vickers hardness.
    Type: Grant
    Filed: August 31, 2010
    Date of Patent: July 28, 2015
    Assignee: HITACHI METALS, LTD.
    Inventors: Itto Sugimoto, Kazutaka Okamoto, Fumiaki Honda, Kenichi Inoue
  • Patent number: 8991564
    Abstract: A disk brake includes a caliper body having a cylinder portion (25) with a cylindrical shape. The cylinder portion (25) has a bore (30) with a bottom (34) formed by integrally joining together an opening peripheral edge (98) at the bottom side of the cylinder portion (25) and a bottom cover member (92) to be fitted to the opening peripheral edge (98) through friction stir welding. The bottom cover member (92) has a disk shape and is friction-stir-welded along the outer periphery thereof. The terminating point of the friction stir welding is within the boundaries of the bottom cover member (92).
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: March 31, 2015
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Shinji Suzuki, Takahiro Tokunaga, Yuichi Kobayashi, Yasuhisa Omata, Jun Watanabe, Seunghwan Park, Akihiro Sato, Satoshi Hirano, Kazutaka Okamoto
  • Patent number: 8932516
    Abstract: It is an objective of the present invention to provide an aluminum porous body which is formed of a pure aluminum and/or aluminum alloy base material and has excellent sinterability and high dimensional accuracy without employing metal stamping. There is provided an aluminum porous body having a relative density of from 5 to 80% with respect to the theoretical density of pure aluminum, in which the aluminum porous body contains 50 mass % or more of aluminum (Al) and from 0.001 to 5 mass % of at least one selected from chlorine (Cl), sodium (Na), potassium (K), fluorine (F), and barium (Ba). It is preferred that the aluminum porous body further contains from 0.1 to 20 mass % of at least one selected from carbon (C), silicon carbide (SiC), iron (II) oxide (FeO), iron (III) oxide (Fe2O3), and iron (II,III) oxide (Fe3O4).
    Type: Grant
    Filed: April 1, 2011
    Date of Patent: January 13, 2015
    Assignee: Hitachi, Ltd.
    Inventors: Masami Taguchi, Kazutaka Okamoto, Akio Hamaoka, Kouji Sasaki
  • Patent number: 8859985
    Abstract: A radiation detector employed in a radiation detection apparatus and a fluorescent X-ray analyzer includes: a first circuit board on which a semiconductor radiation sensor is mounted and which is cooled by a Peltier device (an electronic cooling unit); and a second circuit board set apart from the first circuit board. A plurality of lead pins are joined to the second circuit board. Then, the first circuit board and the second circuit board are wire-bonded to each other. In comparison with conventional wire bonding performed onto the tips of lead pins, the work of connection is easy, the productivity is high, and the reliability of connection is high. Further, the second circuit board not requiring cooling is set apart so that cooling is concentrated on the first circuit board. This permits size reduction of the radiation detector.
    Type: Grant
    Filed: November 4, 2013
    Date of Patent: October 14, 2014
    Assignee: HORIBA, Ltd.
    Inventors: Kengo Yasui, Kazutaka Okamoto, Shuji Takada
  • Publication number: 20140124665
    Abstract: A radiation detector employed in a radiation detection apparatus and a fluorescent X-ray analyzer includes: a first circuit board on which a semiconductor radiation sensor is mounted and which is cooled by a Peltier device (an electronic cooling unit); and a second circuit board set apart from the first circuit board. A plurality of lead pins are joined to the second circuit board. Then, the first circuit board and the second circuit board are wire-bonded to each other. In comparison with conventional wire bonding performed onto the tips of lead pins, the work of connection is easy, the productivity is high, and the reliability of connection is high. Further, the second circuit board not requiring cooling is set apart so that cooling is concentrated on the first circuit board. This permits size reduction of the radiation detector.
    Type: Application
    Filed: November 4, 2013
    Publication date: May 8, 2014
    Applicant: HORIBA, Ltd.
    Inventors: Kengo YASUI, Kazutaka OKAMOTO, Shuji TAKADA
  • Patent number: 8646316
    Abstract: A slide type liquid sample quantity determiner is provided that may enable the whole of a quantity determining flow path to be surely filled with a liquid sample, and also a quantity determination time to be shortened. An upstream side capillary flow path, a quantity determining capillary flow path, and a downstream side capillary flow path are reduced in diameter in this order. When a slide body is at a liquid sample quantity determination position X, an upstream side opening of the quantity determining capillary flow path is contained in a downstream side opening of the upstream side capillary flow path, and an upstream side opening of the downstream side capillary flow path is contained in a downstream side opening of the quantity determining capillary flow path.
    Type: Grant
    Filed: February 7, 2011
    Date of Patent: February 11, 2014
    Assignee: Horiba, Ltd.
    Inventors: Kazuhiro Miyamura, Katsutoshi Ishizuka, Kazutaka Okamoto
  • Patent number: 8501112
    Abstract: The present invention is intended to, in a configuration in which a liquid container for analysis sealed by a sealing member is penetrated by a penetrating member, prevent the sealing member from being unexpectedly broken to leak a liquid for analysis. Also, the present invention has: a container holder part that holds a liquid container for analysis; a penetrating member that penetrates a sealing member of the liquid container for analysis; a first moving mechanism that enables the penetrating member to be moved between a hole making position and a receding position; and a second moving mechanism that enables the penetrating member moved to the hole making position by the first moving mechanism to be moved toward the sealing member to a penetrating position where the penetrating member penetrates the sealing member.
    Type: Grant
    Filed: August 23, 2011
    Date of Patent: August 6, 2013
    Assignee: HORIBA, Ltd.
    Inventors: Kazuhiro Miyamura, Kazutaka Okamoto
  • Patent number: 8480783
    Abstract: A sintered porous metal body, which has a sintered structure having a volumetric porosity of 10 to 90%, wherein there are at least one powder particles selected from the group consisting of dielectric material powders and semiconductor material powders that absorb energy of electromagnetic wave having a frequency of 300 MHz to 300 GHz among the metal crystalline particles constituting the sintered body, wherein the particles are substantially homogeneously dispersed in the sintered body, and wherein the metal particles are sintered to bond each other to be united to constitute pores. The invention discloses a method of manufacturing the sintered porous metal body.
    Type: Grant
    Filed: July 21, 2010
    Date of Patent: July 9, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Kazutaka Okamoto, Masami Taguchi
  • Patent number: 8354059
    Abstract: Not only a downsized cartridge but also an aperture constituted simply and at low cost using a downsized configuration of the cartridge is provided. A measurement channel includes a front-surface-side channel unit provided on a front surface of a cartridge main body; a rear-surface-side channel unit provided on a rear surface of the cartridge main body; and a connection channel unit connecting the front-surface-side channel unit to the rear-surface-side channel unit. An aperture is formed in the connection channel unit, a fluid contact unit of one electrode is arranged in the front-surface-side channel unit, and a fluid contact unit of the other electrode is arranged in the rear-surface-side channel unit.
    Type: Grant
    Filed: August 23, 2011
    Date of Patent: January 15, 2013
    Assignee: HORIBA, Ltd.
    Inventors: Kazuhiro Miyamura, Kazutaka Okamoto
  • Publication number: 20120211485
    Abstract: A heat insulation material for microwave heating with excellent heating efficiency is provided. A heat insulation material for microwave heating includes a base material formed of an inorganic oxide, and fine carbon particles are dispersed in the heat insulation material. Preferably, the heat insulation material includes the carbon in an amount of 0.001 to 6 wt% . Preferably, the heat insulationmaterial has a density of 2 to 6 g/cm3.
    Type: Application
    Filed: February 16, 2012
    Publication date: August 23, 2012
    Inventors: Masami TAGUCHI, Kazutaka Okamoto
  • Patent number: 8222579
    Abstract: A microwave irradiation system includes first and second microwave generators, and an applicator which includes: a microwave transmission part connected to the first and second microwave generators; a reflecting plane, at an other end of the microwave transmission part of the applicator, configured to reflect microwaves from the first and the second microwave generators at such a location that a space of an object, in the microwave transmission part of the applicator between the end and the other end is irradiated with both a greater intensity of electric field and a smaller intensity of magnetic field generated by the first microwave generator and with both a greater intensity of magnetic field and a smaller intensity of electric field generated by the second microwave generator; and a filter part through which at least one of the first and second microwave generators is connected to the applicator.
    Type: Grant
    Filed: July 29, 2010
    Date of Patent: July 17, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Masami Taguchi, Noboru Baba, Kazutaka Okamoto, Tomokatsu Oguro, Toshio Ogura, Masumi Kuga
  • Publication number: 20120103734
    Abstract: A disk brake includes a caliper body having a cylinder portion 25 with a cylindrical shape. The cylinder portion 25 has a bore 30 with a bottom 34 formed by integrally joining together an opening peripheral edge 98 at the bottom side of the cylinder portion 25 and a bottom cover member 92 to be fitted to the opening peripheral edge 98 through friction stir welding. The bottom cover member 92 has a disk shape and is friction-stir-welded along the outer periphery thereof. The terminating point of the friction stir welding is within the boundaries of the bottom cover member 92.
    Type: Application
    Filed: September 22, 2011
    Publication date: May 3, 2012
    Inventors: Shinji SUZUKI, Takahiro Tokunaga, Yuichi Kobayashi, Yasuhisa Omata, Jun Watanabe, Seunghwan Park, Akihiro Sato, Satoshi Hirano, Kazutaka Okamoto