Patents by Inventor Kazumi Sakai

Kazumi Sakai 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: 20180298304
    Abstract: Provided is a grease composition containing a base oil, a thickener, and an additive. The base oil contains a poly-?-olefin and has a kinematic viscosity of 20-60 mm2/s at 40° C. The thickener contains a urea compound produced by reacting a diisocyanate compound with a mixed amine containing an alicyclic amine and an aromatic amine. The additive contains a phosphorous acid ester, an ether compound, and an oxidized paraffin.
    Type: Application
    Filed: June 9, 2016
    Publication date: October 18, 2018
    Applicants: JTEKT Corporation, JXTG Nippon Oil & Energy Corporation
    Inventors: Koji YOSHIZAKI, Hiroshi INUKAI, Yoichiro SANKAI, Shinji YAMANE, Hideo SHIBATA, Hirofumi INOUE, Ryuji NAKATA, Kazumi SAKAI, Kentaro YAMAGUCHI, Kiyomi SAKAMOTO
  • Publication number: 20180057768
    Abstract: Provided herein is a grease composition capable of reducing an amount of wear in sliding parts of various members of automobiles, electrical devices, and the like. The grease composition includes a lubricant base oil, a thickener, an amide compound, and at least one of an ?-hydroxycarboxylic acid metal salt, and an ?-hydroxycarboxylic acid metal salt. The hydroxycarboxylic acid metal salts are contained in a total content of 0.1 to 2 mass % with respect to the total amount of the grease composition.
    Type: Application
    Filed: March 9, 2016
    Publication date: March 1, 2018
    Applicant: JXTG NIPPON OIL & ENERGY CORPORATION
    Inventors: Kazumi SAKAI, Hisayuki WADA, Yusuke AYAME
  • Patent number: 9873851
    Abstract: Provided are both a grease composition for an electric power steering device and an electric power steering device. The grease composition can keep a sufficiently low coefficient of friction in a sliding area between a steel and a resin over a long period, is less susceptible to being removed from the sliding area, does not cause break down of an oil film, and thus can minimize the occurrence of stick-slips. A grease composition for an electric power steering device, containing a synthetic hydrocarbon oil which exhibits a density of 0.75 to 0.95 g/cm3 at 15° C., a saturated aliphatic amide compound, boron nitride, a glycerin fatty acid partial ester, and a metal soap-based thickener; and an electric power steering device using the grease composition.
    Type: Grant
    Filed: August 29, 2013
    Date of Patent: January 23, 2018
    Assignees: JX NIPPON OIL & ENERGY CORPORATION, HITACHI AUTOMOTIVE SYSTEMS STEERING, LTD.
    Inventors: Takashi Arai, Kazumi Sakai, Yuji Shitara, Satoshi Taniuchi, Kohtaro Shiino, Tatsuro Suzuki
  • Patent number: 9381889
    Abstract: An antenna core includes a laminate of a plurality of Co-based amorphous magnetic alloy thin strips in which a length ratio of a long axis to a short axis is greater than 1. 60% or more of the Co-based amorphous magnetic alloy thin strips in terms of the number of the thin strips as percentage have a line-shaped mark formed along the long axis on at least one surface thereof. An antenna includes the antenna core and a winding wound around the antenna core along the long axis.
    Type: Grant
    Filed: October 21, 2014
    Date of Patent: July 5, 2016
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MATERIALS CO., LTD.
    Inventors: Tadao Saito, Katsuhiko Yamada, Kazumi Sakai
  • Publication number: 20150232778
    Abstract: Provided are both a grease composition for an electric power steering device and an electric power steering device. The grease composition can keep a sufficiently low coefficient of friction in a sliding area between a steel and a resin over a long period, is less susceptible to being removed from the sliding area, does not cause break down of an oil film, and thus can minimize the occurrence of stick-slips. A grease composition for an electric power steering device, containing a synthetic hydrocarbon oil which exhibits a density of 0.75 to 0.95 g/cm3 at 15° C., a saturated aliphatic amide compound, boron nitride, a glycerin fatty acid partial ester, and a metal soap-based thickener; and an electric power steering device using the grease composition.
    Type: Application
    Filed: August 29, 2013
    Publication date: August 20, 2015
    Applicants: JX NIPPON OIL & ENERGY CORPORATION, HITACHI AUTOMOTIVE SYSTEMS STEERING, LTD.
    Inventors: Takashi Arai, Kazumi Sakai, Yuji Shitara, Satoshi Taniuchi, Kohtaro Shiino, Tatsuro Suzuki
  • Publication number: 20150035647
    Abstract: An antenna core includes a laminate of a plurality of Co-based amorphous magnetic alloy thin strips in which a length ratio of a long axis to a short axis is greater than 1. 60% or more of the Co-based amorphous magnetic alloy thin strips in terms of the number of the thin strips as percentage have a line-shaped mark formed along the long axis on at least one surface thereof. An antenna includes the antenna core and a winding wound around the antenna core along the long axis.
    Type: Application
    Filed: October 21, 2014
    Publication date: February 5, 2015
    Applicants: Kabushiki Kaisha Toshiba, Toshiba Materials Co.,Ltd.
    Inventors: Tadao SAITO, Katsuhiko YAMADA, Kazumi SAKAI
  • Publication number: 20150024981
    Abstract: Provided is a grease composition that has high lubricity, particularly excellent wear resistance, and shows only a small extent of deterioration in wear resistance with long-term use under high temperatures. The grease composition comprises at least one base oil selected from a mineral oil-based lubricant base oil and a synthetic lubricant base oil, an amide compound, a solid lubricant, and a urea-based thickener, wherein the amide compound is heated and melted at least once with the base oil.
    Type: Application
    Filed: March 1, 2013
    Publication date: January 22, 2015
    Inventors: Yusuke Ayame, Kazumi Sakai, Yuji Shitara
  • Publication number: 20150024980
    Abstract: Provided is a grease composition that improves the dispersibility of a solid lubricant, that provides a sufficiently low friction coefficient in steel-resin sliding parts, and that prevents a stick-slip phenomenon. The grease composition comprising a lubricant base oil having a density of 0.75 to 0.95 g/cm3 at 15° C., an amide compound, a solid lubricant, and a metal soap-based thickener, wherein the solid lubricant is preferably a layered compound or a fluororesin, and wherein the amide compound is preferably a monoamide or a bisamide.
    Type: Application
    Filed: March 1, 2013
    Publication date: January 22, 2015
    Applicant: JX Nippon Oil & Energy Corporation
    Inventors: Takashi Arai, Kazumi Sakai, Yuji Shitara
  • Patent number: 8902067
    Abstract: An antenna core includes a laminate of a plurality of Co-based amorphous magnetic alloy thin strips in which a length ratio of a long axis to a short axis is greater than 1. 60% or more of the Co-based amorphous magnetic alloy thin strips in terms of the number of the thin strips as percentage have a line-shaped mark formed along the long axis on at least one surface thereof. An antenna includes the antenna core and a winding wound around the antenna core along the long axis.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: December 2, 2014
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.
    Inventors: Tadao Saito, Katsuhiko Yamada, Kazumi Sakai
  • Patent number: 8125305
    Abstract: An inductance element (1) includes a doughnut-shaped magnetic core (2) and a bottomed container (3) for housing the doughnut-shaped magnetic core (2). The bottomed container (3) has a cylindrical outer wall portion, a cylindrical inner wall portion, a bottom portion, an open section and a hollow portion. The open section of the bottomed container (3) is covered with an adhesive portion (4) for integrally fixing the doughnut-shaped magnetic core (2) and the bottomed container (3). The adhesive portion (4) has an extended portion (4a) extended in the cylindrical inner wall portion. The ratio (B/A) of a length (B) of the extended portion (4a) to a height (A) of the cylindrical inner wall portion is in a range of 0.1 to 0.5.
    Type: Grant
    Filed: May 20, 2008
    Date of Patent: February 28, 2012
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.
    Inventors: Tadao Saito, Kazumi Sakai, Katsuhiko Yamada
  • Publication number: 20110248819
    Abstract: An antenna core includes a laminate of a plurality of Co-based amorphous magnetic alloy thin strips in which a length ratio of a long axis to a short axis is greater than 1. 60% or more of the Co-based amorphous magnetic alloy thin strips in terms of the number of the thin strips as percentage have a line-shaped mark formed along the long axis on at least one surface thereof. An antenna includes the antenna core and a winding wound around the antenna core along the long axis.
    Type: Application
    Filed: June 22, 2011
    Publication date: October 13, 2011
    Applicants: TOSHIBA MATERIALS CO., LTD., KABUSHIKI KAISHA TOSHIBA
    Inventors: Tadao SAITO, Katsuhiko YAMADA, Kazumi SAKAI
  • Publication number: 20110205765
    Abstract: An inductance element (1) includes a doughnut-shaped magnetic core (2) and a bottomed container (3) for housing the doughnut-shaped magnetic core (2). The bottomed container (3) has a cylindrical outer wall portion, a cylindrical inner wall portion, a bottom portion, an open section and a hollow portion. The open section of the bottomed container (3) is covered with an adhesive portion (4) for integrally fixing the doughnut-shaped magnetic core (2) and the bottomed container (3). The adhesive portion (4) has an extended portion (4a) extended in the cylindrical inner wall portion. The ratio (B/A) of a length (B) of the extended portion (4a) to a height (A) of the cylindrical inner wall portion is in a range of 0.1 to 0.5.
    Type: Application
    Filed: May 20, 2008
    Publication date: August 25, 2011
    Applicants: Kabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.
    Inventors: Tadao Saito, Kazumi Sakai, Katsuhiko Yamada
  • Patent number: 7982569
    Abstract: In one embodiment, an inductance element includes a toroidal core and a bottomed insulating resin case. The bottomed insulating resin case includes a cylindrical outer wall section, a cylindrical inner wall section, a bottom section, an open section and a hollow section. The cylindrical outer wall section has an extending section exceeding the height of the toroidal core. The open section of the insulating resin case is covered with a cover portion having a bent section formed by bending an extending section of the cylindrical outer wall section.
    Type: Grant
    Filed: April 23, 2010
    Date of Patent: July 19, 2011
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.
    Inventors: Tadao Saito, Kazumi Sakai, Katsuhiko Yamada
  • Patent number: 7847662
    Abstract: An inductance element (1) includes a doughnut-shaped magnetic core (2) having a wound body or a stacked body of a magnetic ribbon, a bottomed container (3) in which the doughnut-shaped magnetic core (2) is housed, and a conductive lead portion (5) inserted into a hollow section of the doughnut-shaped magnetic core (2) housed in the bottomed container (3). An open section of the bottomed container (3) is covered with an adhesive portion (4) which integrally fixes the doughnut-shaped magnetic core (2), the bottomed container (3) and the conductive lead portion (5). The adhesive portion (4) is entered into a gap between the doughnut-shaped magnetic core (2) and the bottomed container (3) and a gap between the bottomed container (3) and the conductive lead portion (5) in a range of 5 to 50% in average to a thickness of the doughnut-shaped magnetic core (2).
    Type: Grant
    Filed: April 16, 2008
    Date of Patent: December 7, 2010
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.
    Inventors: Tadao Saito, Kazumi Sakai, Katsuhiko Yamada
  • Publication number: 20100201474
    Abstract: In one embodiment, an inductance element includes a toroidal core and a bottomed insulating resin case. The bottomed insulating resin case includes a cylindrical outer wall section, a cylindrical inner wall section, a bottom section, an open section and a hollow section. The cylindrical outer wall section has an extending section exceeding the height of the toroidal core. The open section of the insulating resin case is covered with a cover portion having a bent section formed by bending an extending section of the cylindrical outer wall section.
    Type: Application
    Filed: April 23, 2010
    Publication date: August 12, 2010
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MATERIALS CO., LTD.
    Inventors: Tadao Saito, Kazumi Sakai, Katsuhiko Yamada
  • Publication number: 20100085778
    Abstract: An inductance element (1) includes a doughnut-shaped magnetic core (2) having a wound body or a stacked body of a magnetic ribbon, a bottomed container (3) in which the doughnut-shaped magnetic core (2) is housed, and a conductive lead portion (5) inserted into a hollow section of the doughnut-shaped magnetic core (2) housed in the bottomed container (3). An open section of the bottomed container (3) is covered with an adhesive portion (4) which integrally fixes the doughnut-shaped magnetic core (2), the bottomed container (3) and the conductive lead portion (5). The adhesive portion (4) is entered into a gap between the doughnut-shaped magnetic core (2) and the bottomed container (3) and a gap between the bottomed container (3) and the conductive lead portion (5) in a range of 5 to 50% in average to a thickness of the doughnut-shaped magnetic core (2).
    Type: Application
    Filed: April 16, 2008
    Publication date: April 8, 2010
    Applicants: Kabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd
    Inventors: Tadao Saito, Kazumi Sakai, Katsuhiko Yamada
  • Patent number: 6525342
    Abstract: A display device comprises a gate metal and a data metal formed in an array region and in a periphery region outside of the array region of the display device. A planarizing layer is formed over the array region and the periphery region. Vias are patterned into the planarizing layer in the array region and the periphery region to expose portions of at least one of the gate metal and the data metal. A transparent conductor is deposited in the array region and the periphery region. A metal layer is locally deposited over the transparent conductor in selected areas of the periphery region. The metal layer and the transparent conductor are patterned to form an additional wiring level and/or to form connections between the gate metal and the data metal in the periphery region and to form transparent pixel electrodes in the array region.
    Type: Grant
    Filed: May 23, 2001
    Date of Patent: February 25, 2003
    Assignee: International Business Machines Corporation
    Inventors: Takahisa Amemiya, Toshiaki Arai, Evan George Colgan, Yoshitami Sakaguchi, Kazumi Sakai, Kai R. Schleupen
  • Publication number: 20020177281
    Abstract: A display device and method for fabrication are disclosed. A gate metal and a data metal are formed in an array region and in a periphery region outside of the array region of the display device. A planarizing layer is formed over the array region and the periphery region, and vias are patterned into the planarizing layer in the array region and the periphery region to expose portions of at least one of the gate metal and the data metal. A transparent conductor is deposited in the array region and the periphery region. A metal layer is locally deposited over the transparent conductor in selected areas of the periphery region. Then, using a same lithographic pattern, the metal layer and the transparent conductor are patterned to form an additional wiring level and/or to form connections between the gate metal and the data metal in the periphery region and to form transparent pixel electrodes in the array region.
    Type: Application
    Filed: May 23, 2001
    Publication date: November 28, 2002
    Applicant: International Business Machines Corporation
    Inventors: Takahisa Amemiya, Toshiaki Arai, Evan George Colgan, Yoshitami Sakaguchi, Kazumi Sakai, Kai R. Schleupen
  • Patent number: 6480084
    Abstract: An inductance element comprises a coil having a hollow portion opened at both ends and provided with a winding of which number of turns (N) per length 10 mm is 20 or more and 500 or less, and a core having a single layer or a plurality of layers of magnetic ribbon of a thickness of 4 &mgr;m or more and 50 &mgr;m or less and a width of 2 mm or more and 40 mm or less, at least part thereof being disposed in the hollow portion. In such an inductance element, a ratio (N/n) of a number of turns (N) of the coil per length 10 mm to a number of layers (n) of the magnetic ribbon is set at 20 or more and 500 or less. The magnetic ribbon, for instance in a state disposed in the hollow portion of the coil, has an open magnetic circuit structure. Instead, the magnetic ribbon, by disposing penetrating the hollow portion and magnetically connecting both ends thereof, forms a closed magnetic circuit loop. Such an inductance element possesses excellent inductance characteristics and is good in winding efficiency.
    Type: Grant
    Filed: June 29, 2000
    Date of Patent: November 12, 2002
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tadao Saito, Yasuaki Moriya, Kazumi Sakai, Takao Kusaka
  • Patent number: 6259490
    Abstract: The present invention provides a liquid crystal display device having a position detecting function with a high sensitivity and a high resolution. The position detecting function comprises a position detecting electrically conductive film on a polarizer or a color filter glass substrate of the liquid crystal display device. The present invention also can suppress the undesired generation of an air gap between the polarizer and color filter glass substrate by using a polarizer that is smaller in size relative to the position detecting electrically conductive film.
    Type: Grant
    Filed: August 26, 1998
    Date of Patent: July 10, 2001
    Assignee: International Business Machines Corporation
    Inventors: Evan George Colgan, James Lewis Levine, Mikio Kurihara, Satoshi Karube, Kazumi Sakai, Eisuke Kanzaki, Hiroshi Mishima