Patents by Inventor Atsushi Ishikawa

Atsushi Ishikawa 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: 20210313359
    Abstract: A light detecting device includes: a filter array including filters two-dimensionally arrayed and an image sensor including light detection elements. Each of first and second filters included in the filters includes a first reflective layer, a second reflective layer, and an intermediate layer therebetween and has a resonance structure having resonant modes whose orders are different from each other. A refractive index and/or a thickness of the intermediate layer in the first and second filters is different depending on the filter. A transmission spectrum of each of the first and second filters has local maximum value of transmittance at each of wavelengths included in a wavelength region, and the wavelengths correspond to the resonant modes, respectively. The image sensor is disposed at a position where the image senor receives passing light that passes through the filter array, to detect components in the wavelengths included in the passing light.
    Type: Application
    Filed: June 16, 2021
    Publication date: October 7, 2021
    Inventors: ATSUSHI ISHIKAWA, YASUHISA INADA
  • Publication number: 20210273507
    Abstract: A rotor includes an electromagnetic steel sheet, a first permanent magnet, and a second permanent magnet. The electromagnetic steel sheet includes a first magnet insertion hole and a second magnet insertion hole that are arranged in a V shape, and also includes a center rib between the first magnet insertion hole and the second magnet insertion hole. The rotor satisfies T?W1?2×T?W2, where T is a thickness of the electromagnetic steel sheet, W1 is a minimum width of the center rib, and W2 is a maximum width of the center rib.
    Type: Application
    Filed: October 30, 2018
    Publication date: September 2, 2021
    Inventor: Atsushi ISHIKAWA
  • Patent number: 11108293
    Abstract: A stator includes a stator core and a winding wound around the stator core in wave winding. The winding includes an assembly of a plurality of covered wires, and an outer cover film that surrounds and covers the assembly and contains thermosetting resin. Each of the covered wires includes a conductor and an insulating film surrounding and covering the conductor. Each of the covered wires has a wire width of 1.5 mm or less.
    Type: Grant
    Filed: May 25, 2017
    Date of Patent: August 31, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Atsushi Ishikawa, Koji Yabe
  • Publication number: 20210206424
    Abstract: A control device for a power steering device includes a low-pass filter unit including a cutoff frequency adjustment unit configured to adjust a cutoff frequency for partially attenuating a component of an input signal, set the cutoff frequency to a first cutoff frequency when a steering torque signal is lower than a first predetermined torque value, and to set the cutoff frequency to a second cutoff frequency lower than the first cutoff frequency when the steering torque signal is equal to or higher than the first predetermined torque value.
    Type: Application
    Filed: January 31, 2019
    Publication date: July 8, 2021
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Yasuhito NAKAKUKI, Kazuya YAMANO, Atsushi ISHIKAWA
  • Patent number: 11050310
    Abstract: A rotor includes a rotor core having a cylindrical outer circumferential surface around an axis line, the rotor core further having a first end and a second end that are both ends in a direction of the axis line, a first permanent magnet disposed in a region of the rotor core having the first end, and a second permanent magnet disposed in another region of the rotor core having the second end. The first permanent magnet is inclined so that a distance from the axis line to the first permanent magnet increases in a direction along the axis line toward the first end. The second permanent magnet is inclined so that a distance from the axis line to the second permanent magnet increases in a direction along the axis line toward the second end.
    Type: Grant
    Filed: July 11, 2016
    Date of Patent: June 29, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventor: Atsushi Ishikawa
  • Patent number: 11042435
    Abstract: A circuit apparatus 100 includes: an interface circuit 120 that receives setting data; and a control circuit 110 that controls the operations of the circuit apparatus 100 based on the setting data and also controls access to a nonvolatile memory 10. The control circuit 110 generates error detection data based on the setting data received by the interface circuit 120, and writes the setting data and the error detection data to the nonvolatile memory 10.
    Type: Grant
    Filed: May 28, 2019
    Date of Patent: June 22, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Atsushi Ishikawa
  • Publication number: 20210175761
    Abstract: A rotor core has first and second core parts in an axial direction. The first and second core parts have first and second magnet insertion holes in which rare earth magnets are disposed. A width of the first magnet insertion hole is wider than the second magnet insertion hole. The first core part has one or more slits elongated in the radial direction, the number of which is N1 (?1), on a radially outer side of the first magnet insertion hole. The second core part has no, one or more slits elongated in the radial direction, the number of which is N2 (?0), on a radially outer side of the second magnet insertion hole. N1>N2 is satisfied. A ratio of a length of the second core part in the axial direction to that of the rotor core is greater than or equal to 70% and less than 100%.
    Type: Application
    Filed: May 10, 2018
    Publication date: June 10, 2021
    Inventor: Atsushi ISHIKAWA
  • Publication number: 20210152039
    Abstract: A stator includes a stator core and a plurality of segment coils fixed to the stator core by wave winding. The stator core includes a first tooth and a second tooth that is adjacent to the first tooth. The first tooth includes a first main part and a first end part. The second tooth includes a second main part and a second end part. When a straight line passing through an axis and a center of the outer end of the first main part is defined as L1, a straight line passing through the axis and a center of the outer end of the second main part is defined as L2, and a straight line passing through the axis and a halfway point between the first end part and the second end part is defined as L3, and letting ?1 be an angle between the straight line L1 and the straight line L3, and letting ?2 be an angle between the straight line L2 and the straight line L3, the stator satisfies ?1>?2.
    Type: Application
    Filed: August 3, 2018
    Publication date: May 20, 2021
    Inventor: Atsushi ISHIKAWA
  • Publication number: 20210141257
    Abstract: An optical scan device includes an optical waveguide array, including a plurality of optical waveguides each of which propagates light along a first direction, that emits a light beam, the plurality of optical waveguides being arranged in a second direction that intersects the first direction, a phase shifter array including a plurality of phase shifters connected separately to each of the plurality of optical waveguides, a control circuit that controls a phase shift amount of each of the plurality of phase shifters and/or inputting of light to each of the plurality of phase shifters and thereby controls a direction and shape of the light beam that is emitted from the optical waveguide array, a photodetector that detects the light beam reflected by a physical object, and a signal processing circuit that generates distance distribution data on the basis of output from the photodetector.
    Type: Application
    Filed: January 18, 2021
    Publication date: May 13, 2021
    Inventors: YASUHISA INADA, ATSUSHI ISHIKAWA, YUMIKO KATO
  • Patent number: 10916989
    Abstract: A motor is provided in a shell. The motor includes a stator having an outer peripheral surface facing an inner peripheral surface of the shell, a rotor rotatably disposed inside the stator, and a nonmagnetic film disposed between the outer peripheral surface of the stator and the inner peripheral surface of the shell.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: February 9, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventor: Atsushi Ishikawa
  • Publication number: 20210036562
    Abstract: A motor includes a rotor rotatable about a rotation axis, and a stator surrounding the rotor so as to form an air gap between the stator and the rotor. The rotor has a rotor core having a magnet insertion hole and a rare earth magnet provided in the magnet insertion hole. The rotor core has a plurality of slits on an outer side of the magnet insertion hole in a radial direction about the rotation axis. Each of the plurality of slits has a length in the radial direction which is longer than a length in a circumferential direction about the rotation axis. The plurality of slits have a uniform minimum distance to the magnet insertion hole. When the minimum distance is expressed as T and the air gap is expressed as G, 2.75?T/G?5.25 is satisfied.
    Type: Application
    Filed: April 10, 2018
    Publication date: February 4, 2021
    Inventor: Atsushi ISHIKAWA
  • Publication number: 20200328636
    Abstract: A reluctance motor is used in a compressor. The reluctance motor includes a rotor having a rotor core that has an annular outer circumference about an axis, having a plurality of magnetic poles along the outer circumference, and having no permanent magnet, and a stator including a stator core that surrounds the rotor from an outer side in a radial direction about the axis and a winding wound around the stator core in wave winding. Each of the plurality of magnetic poles has a first slit formed in the rotor core and a second slit formed on an inner side of the first slit in the radial direction. The stator core has a refrigerant passage through which refrigerant passes in a direction of the axis.
    Type: Application
    Filed: June 2, 2017
    Publication date: October 15, 2020
    Inventor: Atsushi ISHIKAWA
  • Publication number: 20200303974
    Abstract: A motor is used in a compressor. The motor includes a stator including a stator core having a yoke part that extends in a circumferential direction about an axis and a plurality of teeth that extend from the yoke part toward the axis and are arranged in the circumferential direction, and a winding wound around the plurality of teeth of the stator core in wave winding, and a rotor whose number of poles is P and which is disposed on an inner side of the stator in a radial direction about the axis. When a number of the plurality of teeth is represented by S, S/P?6 is satisfied. The yoke part has a refrigerant passage through which refrigerant passes in a direction of the axis.
    Type: Application
    Filed: May 25, 2017
    Publication date: September 24, 2020
    Inventor: Atsushi ISHIKAWA
  • Patent number: 10778055
    Abstract: In an electric motor, a first magnet and a second magnet are accommodated in magnet accommodating apertures of a rotor core. On outer circumferential core portions that exist on a radially outer side of the magnet accommodating apertures, two slits as a pair of first slits, and two slits that are respectively adjacent to each of the first slits are disposed circumferentially outside the pair of first slits as a pair of second slits. The outer circumferential core portions include: a first magnetic portion that exists between the pair of first slits; and a pair of second magnetic portions that respectively exist between the first slits and the second slits. An inter-magnet space portion that exists between the first magnet and the second magnet is positioned within a range of the first magnetic portion in the circumferential direction of the rotor.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: September 15, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kazuhiko Baba, Masahiro Nigo, Kazuchika Tsuchida, Atsushi Ishikawa
  • Patent number: 10710921
    Abstract: [Object] To provide a means manufacturing a medical vial which contains a Type IA borosilicate glass as the raw material and in which the elution amount of silica into a high ionic strength solution decreases to be equal to or less than the silica elution amount in a Type IB borosilicate glass. [Solution] A method for manufacturing a medical vial is a method for manufacturing a medical vial including a fire blast process of applying a flame ejected from a point burner to a deteriorated layer generated on the inner surface of a vial, in which the vial is molded from a glass tube containing a Type IA borosilicate glass as the raw material and the molar ratio of oxides contained in the borosilicate glass satisfies ?=0.23±0.02 in ?=[(Na2O+K2O)—Al2O3]/B2O3 and satisfies ?=7.5±0.5 in ?=B2O3/Al2O3.
    Type: Grant
    Filed: October 9, 2019
    Date of Patent: July 14, 2020
    Assignee: NIPRO CORPORATION
    Inventors: Masamichi Wada, Atsushi Ishikawa
  • Publication number: 20200204029
    Abstract: A stator includes a stator core and a winding wound around the stator core in wave winding. The winding includes an assembly of a plurality of covered wires, and an outer cover film that surrounds and covers the assembly and contains thermosetting resin. Each of the covered wires includes a conductor and an insulating film surrounding and covering the conductor. Each of the covered wires has a wire width of 1.5 mm or less.
    Type: Application
    Filed: May 25, 2017
    Publication date: June 25, 2020
    Inventors: Atsushi ISHIKAWA, Koji YABE
  • Patent number: 10627335
    Abstract: In an embodiment of the present disclosure, a structure comprising an infrared ray absorption surface is provided for use in infrared spectroscopy, and the infrared ray absorption surface absorbs infrared rays in a detection wavelength range that covers the response wavelengths of a substance to be detected. The structure comprises, for example, a metal substrate having a metal surface, metal components arranged at positions facing the metal surface, and a support part that supports each of the metal components relative to the metal surface, and a resonator for the infrared ray absorption surface is formed by the metal substrate, the metal components and the support parts. Additionally, in an embodiment of the present disclosure, an infrared spectroscopy method wherein a specimen is brought into close contact to the infrared ray absorption surface of the structure is also provided.
    Type: Grant
    Filed: July 7, 2016
    Date of Patent: April 21, 2020
    Assignee: RIKEN
    Inventors: Takuo Tanaka, Atsushi Ishikawa
  • Patent number: 10608486
    Abstract: Provided is an interior permanent magnet motor, including: a stator; and a rotor, in which an outline of each of magnet insertion holes includes a radially inner-side line, a radially outer-side line, a pair of side lines, a pair of first round portions, and a pair of second round portions, in which a thin portion is formed between an outer peripheral surface of the rotor and each of the side lines, in which each of the first round portions is provided between a corresponding end of the corresponding radially outer-side line and a corresponding end of the corresponding side line, and in which each of the second round portions is provided between a corresponding end of the corresponding radially inner-side line and a corresponding end of the corresponding side line.
    Type: Grant
    Filed: July 1, 2014
    Date of Patent: March 31, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Atsushi Ishikawa, Kazuhiko Baba, Masahiro Nigo, Kazuchika Tsuchida
  • Patent number: 10581286
    Abstract: A rotor of a permanent-magnet-embedded electric motor includes an annular rotor core having a plurality of magnet insertion holes formed in a circumferential direction, and permanent magnets inserted into the magnet insertion holes, respectively. The rotor core is formed by alternately stacking a first core block and a second core block in an axial direction of the rotor core, the first core block not having slits between each of the magnet insertion holes and a circumferential surface of the rotor core, and the second core block having the slits between each of the magnet insertion holes and the circumferential surface of the rotor core. One of the slits and one end of the permanent magnet are arrayed in a radial direction, and the other slit and the other end of the permanent magnet are arrayed in the radial direction.
    Type: Grant
    Filed: June 15, 2015
    Date of Patent: March 3, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Atsushi Ishikawa, Masahiro Nigo
  • Publication number: 20200039867
    Abstract: [Object] To provide a means manufacturing a medical vial which contains a Type IA borosilicate glass as the raw material and in which the elution amount of silica into a high ionic strength solution decreases to be equal to or less than the silica elution amount in a Type IB borosilicate glass. [Solution] A method for manufacturing a medical vial is a method for manufacturing a medical vial including a fire blast process of applying a flame ejected from a point burner to a deteriorated layer generated on the inner surface of a vial, in which the vial is molded from a glass tube containing a Type IA borosilicate glass as the raw material and the molar ratio of oxides contained in the borosilicate glass satisfies ?=0.23±0.02 in ?=[(Na2O+K2O)—Al2O3]/B2O3 and satisfies ?=7.5±0.5 in ?=B2O3/Al2O3.
    Type: Application
    Filed: October 9, 2019
    Publication date: February 6, 2020
    Inventors: Masamichi WADA, Atsushi ISHIKAWA