Patents by Inventor Hiroaki Kojima

Hiroaki Kojima 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: 10295711
    Abstract: A prototype aluminum mold for stampers that is used to manufacture stampers having a fine irregular surface structure on the surface thereof and containing aluminum and magnesium, wherein the content of magnesium is 0.1% by mass to 3% by mass, the content of silicon is 100 ppm by mass or less, the total content of elements other than aluminum and magnesium is 500 ppm by mass or less, and the number of magnesium silicide particles having an equivalent diameter of 10 nm or more on the surface of the prototype aluminum mold for stampers is 10/1000 ?m2 or less.
    Type: Grant
    Filed: March 26, 2013
    Date of Patent: May 21, 2019
    Assignees: Mitsubishi Chemical Corporation, Nippon Light Metal Company, Ltd.
    Inventors: Katsuhiro Kojima, Hiroshi Onomoto, Hiroaki Kita, Kota Shirai, Hiroshi Okada, Kazume Mochizuki
  • Publication number: 20190080539
    Abstract: This key security device is used together with a first terminal which may be a mobile phone with high functionality and a second terminal which may be an electronic key. The key security device is provided with: a location information acquiring unit which acquires location information about the first terminal from a global positioning system (GPS) receiver of the first terminal; a level setting unit which sets an alert level according to the acquired location information; and a security guard processor which sets a location determination parameter value according to the alert level, monitors the distance between the first terminal and the second terminal through communication between the first terminal and the second terminal according to the alert level and the location determination parameter, and executes a security guard processing of the second terminal according to the result of the monitoring.
    Type: Application
    Filed: April 20, 2017
    Publication date: March 14, 2019
    Applicant: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHO
    Inventors: Sho YOSHIKAWA, Daisuke SENZAKI, Masayuki KAWAMURA, Hiroaki KOJIMA
  • Patent number: 10199900
    Abstract: The present invention provides a rotating machine which can maintain good contact state between the brush and the metal rotating body. A rotating machine of the present invention includes a stator including a stator winding, a rotor including a rotor winding and rotatably disposed apart from the stator with a gap, a metal rotating body electrically coupled with the rotor winding, a brush in contact with the metal rotating body, and a pressing mechanism for increasing pressure to press the brush against the metal rotating body when contact failure occurs between the metal rotating body and the brush.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: February 5, 2019
    Assignee: Hitachi, Ltd.
    Inventors: Takeshi Iwata, Hiroaki Kojima, Motonobu Iizuka
  • Publication number: 20180215943
    Abstract: A composition for an electric wire coating material that has excellent damage resistance, low-temperature flexibility, tear resistance, and thermal stability, and an insulated electric wire in which this composition is used. The composition for an electric wire coating material containing polyvinyl chloride contains a plasticizer in an amount of 15 to 30 parts by mass and one or more ethylene-based copolymers selected from ethylene-vinyl ester copolymers and ethylene-?,?-unsaturated carboxylic acid ester copolymers in an amount of 0.1 to 10 parts by mass, with respect to 100 parts by mass of the polyvinyl chloride. An insulated electric wire is obtained by coating an outer circumference of a conductor with an insulating coating layer, with this composition for an electric wire coating material used in an electric wire coating material.
    Type: Application
    Filed: September 23, 2016
    Publication date: August 2, 2018
    Inventors: Toyoki FURUKAWA, Hiroaki KOJIMA
  • Publication number: 20180148622
    Abstract: A resin composition contains: a thermosetting resin; a thermally conductive filler; and mica; in which, when the thermally conductive filler is divided into a filler group (A) having a particle diameter of from 10 ?m to 100 ?m, a filler group (B) having a particle diameter of from 1.0 ?m to smaller than 10 ?m, and a filler group (C) having a particle diameter of from 0.1 ?m to smaller than 1.0 ?m, a ratio of the filler group (C) with regard to the thermally conductive filler, based on volume, is larger than a ratio of the filler group (B) with regard to the thermally conductive filler, based on volume.
    Type: Application
    Filed: May 24, 2016
    Publication date: May 31, 2018
    Inventors: Yoshitaka TAKEZAWA, Shihui SONG, Keiji FUKUSHIMA, Tomokazu TANASE, Tetsuji KATOH, Akihiro SANO, Hiroaki KOJIMA
  • Publication number: 20180137257
    Abstract: In order to provide a sensing device and the like capable of using the behavior of a plurality of microorganisms changing over time as a sensor for estimating a chemical substance, the present invention includes: a recording unit in which is recorded a plurality of sample data that statistically calculated in advance the behavior of a plurality of microorganisms changing over time in an environment with known chemical substances present; a statistics unit for generating statistical data that statistically calculated the behavior of the plurality of microorganisms changing over time in an environment with a predetermined chemical substance present; and a determination unit for estimating the predetermined chemical substance on the basis of the statistical data and the sample data.
    Type: Application
    Filed: May 10, 2016
    Publication date: May 17, 2018
    Inventors: Hiroto Tanaka, Hiroaki Kojima, Yasushi Naruse, Masato Okada
  • Patent number: 9899926
    Abstract: A power supply device includes a primary winding and at least a first secondary winding connected to a load, a power supply to which the primary winding is connected, a switch configured to adjust a first current flowing through the primary winding, an adjustment amount generation device and a control device. The adjustment amount generation device is configured to generate an adjustment amount to reduce a change in the first current depending at least in part on a change in an output voltage of the power supply supplied to the load. The control device is configured to control the switch based at least in part on the first current, a voltage produced in secondary winding, and the adjustment amount.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: February 20, 2018
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventor: Hiroaki Kojima
  • Publication number: 20180037194
    Abstract: An electronic key system includes a device that is subject to operation, an electronic key that is authenticatable by the device, and a wearable device that is wearable by a user. The wearable device is capable of recognizing an intention communication action of the user. The device authenticates the electronic key and permits a device operation associated with the intention communication action of the user recognized by the wearable device.
    Type: Application
    Filed: February 23, 2016
    Publication date: February 8, 2018
    Applicant: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHO
    Inventors: Daisuke SENZAKI, Yuuki KOUNO, Masayuki KAWAMURA, Hiroaki KOJIMA
  • Patent number: 9851394
    Abstract: The present invention provides a partial-discharge measurement method in which a partial-discharge defect signal and noise are separated, a partial-discharge defect position is detected, and the risk of a detected partial discharge defect is diagnosed. Further, this method provides a highly reliable high-voltage device. An electromagnetic wave generated by a sample is simultaneously measured by a plurality of sensors. A partial discharge and noise are separated through the comparison of the spatial intensity distribution of measured signals and a spatial signal intensity distribution measured beforehand at the time of the occurrence of a partial discharge, and a defect position is detected using a peak position. Further, the risk of a defective site is diagnosed on the basis of a simultaneously measured charge amount signal.
    Type: Grant
    Filed: August 28, 2013
    Date of Patent: December 26, 2017
    Assignee: Hitachi, Ltd.
    Inventors: Hiroaki Kojima, Koji Obata
  • Publication number: 20170332499
    Abstract: A module includes a housing including a battery housing portion that houses a battery, an operation accepting unit including a first board including accepting means that accepts an operation and is arranged on the first board, the first board being attached to the housing, and a second board housed within the battery housing portion along with the battery. A control circuit electrically connected to the accepting means is arranged on the second board.
    Type: Application
    Filed: November 26, 2015
    Publication date: November 16, 2017
    Inventors: Daisuke SENZAKI, Yuki KONO, Masayuki KAWAMURA, Hiroaki KOJIMA
  • Patent number: 9810743
    Abstract: Provided is a deterioration diagnosis system which diagnoses deterioration of an N-phase rotational machine (N denotes a natural number). The deterioration diagnosis system includes a first current sensor to be attached individually to at least lead wires of (N-1)-phases in a rotational machine, the first current sensor being able to detect a current amplitude arising from a plurality of deterioration causes, and a second current sensor to be attached collectively to the lead wires of all phases in the rotational machine, the second current sensor being able to detect a current amplitude arising from a plurality of deterioration causes.
    Type: Grant
    Filed: May 8, 2015
    Date of Patent: November 7, 2017
    Assignee: Hitachi, Ltd.
    Inventors: Kohji Maki, Shinya Yuda, Hiroaki Kojima, Satoshi Kikuchi, Hisashi Endo
  • Publication number: 20170309101
    Abstract: An electronic key includes a housing including a battery housing portion that houses a battery, the battery housing portion being provided in the housing, a battery terminal, arranged within the battery housing portion, that makes contact with one electrode of the battery housed within the battery housing portion, and a board, arranged within the battery housing portion, including a first conductive portion that makes contact with the battery terminal and is electrically connected to the one electrode of the battery via the battery terminal, and a second conductive portion that makes contact with and is electrically connected to another electrode of the battery.
    Type: Application
    Filed: November 26, 2015
    Publication date: October 26, 2017
    Inventors: Daisuke SENZAKI, Yuki KONO, Masayuki KAWAMURA, Hiroaki KOJIMA
  • Patent number: 9779852
    Abstract: The rotating electrical machine of the present invention includes a stator coil obtained by curing the impregnating resin injected into the whole stator coil unit after an electrically insulated coil unit with a mica tape having been wrapped around a conductor is slotted into stator iron core slots via a slot liner. The high-heat-resistance resin component of the slot liner contains at least an epoxy resin having 3 or more epoxy groups. The high-heat-resistance resin component of the mica tape contains at least an alicyclic epoxy resin. The impregnating resin contains a bifunctional epoxy resin, and an acid curing agent having one acid anhydride skeleton. With the impregnating resin, the high-heat-resistance resin components of the slot liner and the mica tape form a liner cured portion and a mica insulating layer portion as an integral unit of different resin compositions inside the slot.
    Type: Grant
    Filed: April 30, 2015
    Date of Patent: October 3, 2017
    Assignee: Hitachi, Ltd.
    Inventors: Kenji Ikeda, Hiroaki Kojima, Motonobu Iiduka, Shoichi Maruyama, Kengo Ueda, Daisuke Kamegawa
  • Publication number: 20170163161
    Abstract: A power supply device includes a primary winding and at least a first secondary winding connected to a load, a power supply to which the primary winding is connected, a switch configured to adjust a first current flowing through the primary winding, an adjustment amount generation device and a control device. The adjustment amount generation device is configured to generate an adjustment amount to reduce a change in the first current depending at least in part on a change in an output voltage of the power supply supplied to the load. The control device is configured to control the switch based at least in part on the first current, a voltage produced in secondary winding, and the adjustment amount.
    Type: Application
    Filed: December 2, 2016
    Publication date: June 8, 2017
    Inventor: Hiroaki KOJIMA
  • Publication number: 20170105282
    Abstract: A circuit board structure includes a test terminal. The circuit board structure includes and interface circuit board and a functional circuit board. The interface circuit board includes common test terminals shared by different functional circuit boards. The functional circuit board realizes a product function. The functional circuit board is selected from a plurality of functional circuit boards respectively realizing different product functions. Circuit components required for each product function are mounted on the corresponding functional circuit board.
    Type: Application
    Filed: September 20, 2016
    Publication date: April 13, 2017
    Applicant: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHO
    Inventors: Daisuke SENZAKI, Masayuki KAWAMURA, Hiroaki KOJIMA
  • Publication number: 20160301274
    Abstract: Provided is a rotating electrical machine coil in which an ununiform bulge of the rotating electrical machine coil protruded outside from the core is suppressed. A rotating electrical machine coil, provided by receiving the rotating electrical machine coil in a core of a rotating electrical machine and performing impregnation with insulating resin and curing of the insulating resin, includes: a plurality of coil conductors; and an insulating tape wound around the coil conductors a plurality of times to form an insulating layer, in which the insulating layer corresponding to at least a part of the coil conductors protruded from the core is provided so that a part of the wound insulating tape is adhered.
    Type: Application
    Filed: March 18, 2016
    Publication date: October 13, 2016
    Inventors: Hiroaki KOJIMA, Kenji IKEDA, Naohiro HIRUTA, Daisuke KAMEGAWA
  • Publication number: 20160216309
    Abstract: The present invention provides a partial-discharge measurement method in which a partial-discharge defect signal and noise are separated, a partial-discharge defect position is detected, and the risk of a detected partial discharge defect is diagnosed. Further, this method provides a highly reliable high-voltage device. An electromagnetic wave generated by a sample is simultaneously measured by a plurality of sensors. A partial discharge and noise are separated through the comparison of the spatial intensity distribution of measured signals and a spatial signal intensity distribution measured beforehand at the time of the occurrence of a partial discharge, and a defect position is detected using a peak position. Further, the risk of a defective site is diagnosed on the basis of a simultaneously measured charge amount signal.
    Type: Application
    Filed: August 28, 2013
    Publication date: July 28, 2016
    Inventors: Hiroaki KOJIMA, Koji OBATA
  • Publication number: 20160155583
    Abstract: A circuit board includes a circuit board pattern forming a part of an electronic circuit and including a mounting pattern group on which a receiving means for receiving an operation can be mounted. The electronic circuit is established even when the receiving means is mounted on any mounting pattern of the mounting pattern group.
    Type: Application
    Filed: December 1, 2015
    Publication date: June 2, 2016
    Inventors: Daisuke SENZAKI, Yuki KONO, Masayuki KAWAMURA, Hiroaki KOJIMA
  • Publication number: 20160118867
    Abstract: The present invention provides a rotating machine which can maintain good contact state between the brush and the metal rotating body. A rotating machine of the present invention includes a stator including a stator winding, a rotor including a rotor winding and rotatably disposed apart from the stator with a gap, a metal rotating body electrically coupled with the rotor winding, a brush in contact with the metal rotating body, and a pressing mechanism for increasing pressure to press the brush against the metal rotating body when contact failure occurs between the metal rotating body and the brush.
    Type: Application
    Filed: October 22, 2015
    Publication date: April 28, 2016
    Inventors: Takeshi IWATA, Hiroaki KOJIMA, Motonobu IIZUKA
  • Patent number: 9242618
    Abstract: A wireless communication system including a portable device and a vehicle device configured to transmit information including a vehicle state. The portable device includes a telecommunication unit that obtains, through an information network, information including procedures that should be taken in accordance with the vehicle state or state of the portable device, a display, and a control unit that shows on the display the vehicle state based on the information transmitted from the vehicle device or the state of the portable device based on information of the portable device. When a measure should be taken in accordance with the vehicle state or the state of the portable device, the control unit shows on the display the procedures included in the information obtained by telecommunication unit.
    Type: Grant
    Filed: November 1, 2012
    Date of Patent: January 26, 2016
    Assignee: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHO
    Inventors: Hideki Kawai, Hiroaki Kojima