Patents by Inventor Takamichi AOKI

Takamichi AOKI 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: 20230036079
    Abstract: A vertical cavity surface-emitting laser configured to emit laser light having a wavelength of 830 nm to 910 nm includes a substrate having a main surface including GaAs, a first distributed Bragg reflector, an active layer, and a second distributed Bragg reflector. The substrate, the first distributed Bragg reflector, the active layer, and the second distributed Bragg reflector are arranged in a first axis direction intersecting the main surface. The main surface has an off angle of 6° or more with respect to a (100) plane. The active layer includes InxAlyGa1-x-yAs (0<x<1, 0?y<1). The active layer has a strain. An absolute value of the strain is 0.5% to 1.4%.
    Type: Application
    Filed: July 8, 2022
    Publication date: February 2, 2023
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Takamichi SUMITOMO, Kei FUJII, Suguru ARIKATA, Takeshi AOKI, Susumu YOSHIMOTO
  • Patent number: 11570881
    Abstract: In a circular accelerator that applies a radiofrequency wave in a main magnetic field to accelerate charged particle beam while increasing an orbit radius, another radiofrequency wave with a frequency different from the radiofrequency wave used for acceleration is applied to the charged particle beam in order to extract the charged particle beam. Thereby, in the circular accelerator that accelerates charged particle beam while increasing an orbit radius by applying a radiofrequency wave in a main magnetic field, the high precision control on extraction of the charged particle beam from the circular accelerator is achieved.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: January 31, 2023
    Assignee: Hitachi, Ltd.
    Inventors: Takamitsu Hae, Takayoshi Seki, Kazuyoshi Saitou, Fumiaki Noda, Takamichi Aoki, Kazuo Hiramoto
  • Publication number: 20220410534
    Abstract: Provided is a production method for a layered product in which a metal film can be formed on the surface of a polyarylene sulfide (PAS) molded article with a high adhesive force by a simple step. Further, provided are: a polyarylene sulfide resin composition and a molded article that can be used in the layered product in which a metal film can be formed on the surface of the PAS molded article with a high adhesive force by a simpler step; and production methods therefor. More specifically, provided are: a polyarylene sulfide resin composition obtained by blending a polyarylene sulfide resin, a thermoplastic elastomer and/or a hydrolyzable thermoplastic resin, a carbonate, and a polyolefin-based wax; a molded article which is obtained by melt-molding the polyarylene sulfide resin composition and in which the surface is roughened; a layered product having a metal plating layer; and production methods therefor.
    Type: Application
    Filed: November 26, 2020
    Publication date: December 29, 2022
    Applicant: DIC Corporation
    Inventors: Takamichi Aoki, Tomomichi Kanda
  • Patent number: 11539059
    Abstract: A fuel cell system includes a reformer, a fuel cell, a desulfurizer, a recirculation passage through which the reformer communicates with the desulfurizer such that a part of the anode gas generated in the reformer flows into the desulfurizer, and an orifice member provided on the recirculation passage. The orifice member or at least a part of an inner wall of a portion that constitutes an upstream side from the orifice member in the recirculation passage is made of a material containing a material having an antifungal action.
    Type: Grant
    Filed: October 12, 2021
    Date of Patent: December 27, 2022
    Assignees: AISIN CORPORATION, DIC Corporation
    Inventors: Satoshi Kato, Takeshi Kitamura, Tomomichi Kanda, Takamichi Aoki
  • Publication number: 20220408541
    Abstract: Provided is a variable energy and miniaturized accelerator. It is impossible to change the energy of the extraction beam in the related cyclotron or to miniaturize an accelerator in the related synchrotron. The accelerator includes a pair of magnets which form a magnetic field therebetween; an ion source which injects ions between the magnets; an acceleration electrode which accelerates the ions; and a beam extraction path which extracts the ions to the outside. A plurality of ring-shaped beam closed orbits formed by the pair of magnets, in which the ions of different energies respectively circulate, are aggregated on one side. The frequency of the radiofrequency electric field fed to the ions by the acceleration electrode is modulated by the beam closed orbits.
    Type: Application
    Filed: August 22, 2022
    Publication date: December 22, 2022
    Inventor: Takamichi AOKI
  • Patent number: 11457523
    Abstract: Provided is a variable energy and miniaturized accelerator. It is impossible to change the energy of the extraction beam in the related cyclotron or to miniaturize an accelerator in the related synchrotron. The accelerator includes a pair of magnets which form a magnetic field therebetween; an ion source which injects ions between the magnets; an acceleration electrode which accelerates the ions; and a beam extraction path which extracts the ions to the outside. A plurality of ring-shaped beam closed orbits formed by the pair of magnets, in which the ions of different energies respectively circulate, are aggregated on one side. The frequency of the radiofrequency electric field fed to the ions by the acceleration electrode is modulated by the beam closed orbits.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: September 27, 2022
    Assignee: HITACHI, LTD.
    Inventor: Takamichi Aoki
  • Publication number: 20220204768
    Abstract: The present invention is a molded article containing a polyarylene sulfide resin, a thermoplastic resin other than the polyarylene sulfide resin, and a metal oxide containing at least one of copper or chromium. The polyarylene sulfide resin forms a continuous phase, and a dispersed phase containing the thermoplastic resin and the metal oxide is present in the continuous phase. The present invention is also a polyarylene sulfide resin composition for providing it, a molded article having a roughened surface, a laminate of the molded article and metal, and methods for producing them. According to the present invention, there is provided a molded article that has superior heat resistance of a polyarylene sulfide resin, on which the speed of plating deposition is practical, and with which a laminate with potentially maintained adhesiveness of plating can be obtained and a method for producing it, as well as a polyarylene sulfide resin composition.
    Type: Application
    Filed: June 2, 2020
    Publication date: June 30, 2022
    Applicant: DIC Corporation
    Inventors: Tomomichi Kanda, Takamichi Aoki
  • Publication number: 20220131164
    Abstract: A fuel cell system includes a reformer, a fuel cell, a desulfurizer, a recirculation passage through which the reformer communicates with the desulfurizer such that a part of the anode gas generated in the reformer flows into the desulfurizer, and an orifice member provided on the recirculation passage. The orifice member or at least a part of an inner wall of a portion that constitutes an upstream side from the orifice member in the recirculation passage is made of a material containing a material having an antifungal action.
    Type: Application
    Filed: October 12, 2021
    Publication date: April 28, 2022
    Applicants: AISIN CORPORATION, DIC Corporation
    Inventors: Satoshi KATO, Takeshi KITAMURA, Tomomichi KANDA, Takamichi AOKI
  • Patent number: 11097126
    Abstract: An accelerator includes: a plurality of ion sources 221, 222, and 233 that generate a plurality of different types of ions; an electromagnet 11 that generates a magnetic field; and a high frequency cavity 21 that generates a high frequency electric field. The center of an orbit of the ion is eccentric with acceleration, the magnetic field generated by the electromagnet 11 is a magnetic field distribution that decreases outward in a radial direction of the orbit, the high frequency cavity 21 accelerates the ion up to a predetermined energy by the high frequency electric field adjusted to an orbital frequency in response to a nuclide of the incident ion, and a frequency of the high frequency electric field changes following an energy of the ion. Accordingly, it is possible to provide an accelerator and a particle therapy system capable shortening an irradiation time with a small size.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: August 24, 2021
    Assignee: Hitachi, Ltd.
    Inventors: Takamichi Aoki, Yuto Nakashima
  • Publication number: 20210196984
    Abstract: An acceleration radiofrequency acceleration system capable of frequency modulation and feeding an acceleration radiofrequency wave for accelerating a beam, a radiofrequency kicker 70 feeding an extraction radiofrequency wave different in frequency, from the acceleration radiofrequency wave for extracting a beam, a peeler magnetic field region 44 and a regenerator magnetic field region 45 for forming a disturbance magnetic field region including a high-order magnetic field that includes a magnetic field component having a number of poles of two poles or more and that includes at least a quadrupole magnetic field component, a shim of a magnetic material, and a septum magnet 43, 43A, 43B having an inner peripheral side septum coil conductor 5, an outer peripheral side septum coil conductor 6, a coil conductor connecting portion 7, and a coil lead-out portion 8 are provided.
    Type: Application
    Filed: February 18, 2019
    Publication date: July 1, 2021
    Inventors: Takamitsu HAE, Takamichi AOKI, Takayoshi SEKI
  • Publication number: 20210195725
    Abstract: In a circular accelerator that applies a radiofrequency wave in a main magnetic field to accelerate charged particle beam while increasing an orbit radius, another radiofrequency wave with a frequency different from the radiofrequency wave used for acceleration is applied to the charged particle beam in order to extract the charged particle beam. Thereby, in the circular accelerator that accelerates charged particle beam while increasing an orbit radius by applying a radiofrequency wave in a main magnetic field, the high precision control on extraction of the charged particle beam from the circular accelerator is achieved.
    Type: Application
    Filed: November 6, 2018
    Publication date: June 24, 2021
    Applicant: Hitachi, Ltd.
    Inventors: Takamitsu Hae, Takayoshi Seki, Kazuyoshi Saitou, Fumiaki Noda, Takamichi Aoki, Kazuo Hiramoto
  • Publication number: 20200330793
    Abstract: An accelerator includes: a plurality of ion sources 221, 222, and 233 that generate a plurality of different types of ions; an electromagnet 11 that generates a magnetic field; and a high frequency cavity 21 that generates a high frequency electric field. The center of an orbit of the ion is eccentric with acceleration, the magnetic field generated by the electromagnet 11 is a magnetic field distribution that decreases outward in a radial direction of the orbit, the high frequency cavity 21 accelerates the ion up to a predetermined energy by the high frequency electric field adjusted to an orbital frequency in response to a nuclide of the incident ion, and a frequency of the high frequency electric field changes following an energy of the ion. Accordingly, it is possible to provide an accelerator and a particle therapy system capable shortening an irradiation time with a small size.
    Type: Application
    Filed: October 9, 2018
    Publication date: October 22, 2020
    Applicant: Hitachi, Ltd.
    Inventors: Takamichi Aoki, Yuto Nakashima
  • Patent number: 10757799
    Abstract: A magnet device that includes upper and lower disk-shaped return yokes, a pair of upper magnetic pole and lower magnetic pole respectively fixed to a disk-shaped surface of the upper return yoke and a disk-shaped surface of the lower return yoke, in which a space to circulate and accelerate an ion beam is formed between the upper magnetic pole and the lower magnetic pole. The upper magnetic pole and the lower magnetic pole have a plurality of concave and convex parts along a track along which the ion beam circulates, are plane-symmetrical with respect to a horizontal symmetry plane formed by the track along which an ion beam circulates, and are plane-symmetrical to one of the vertical planes vertical to the horizontal symmetry plane. Also, the magnetic pole intervals between the concave parts of the upper magnetic pole and the lower magnetic pole are different from each other.
    Type: Grant
    Filed: March 6, 2018
    Date of Patent: August 25, 2020
    Assignee: HITACHI, LTD.
    Inventors: Chishin Hori, Takamichi Aoki
  • Publication number: 20200128659
    Abstract: A magnet device that includes upper and lower disk-shaped return yokes, a pair of upper magnetic pole and lower magnetic pole respectively fixed to a disk-shaped surface of the upper return yoke and a disk-shaped surface of the lower return yoke, in which a space to circulate and accelerate an ion beam is formed between the upper magnetic pole and the lower magnetic pole. The upper magnetic pole and the lower magnetic pole have a plurality of concave and convex parts along a track along which the ion beam circulates, are plane-symmetrical with respect to a horizontal symmetry plane formed by the track along which an ion beam circulates, and are plane-symmetrical to one of the vertical planes vertical to the horizontal symmetry plane. Also, the magnetic pole intervals between the concave parts of the upper magnetic pole and the lower magnetic pole are different from each other.
    Type: Application
    Filed: March 6, 2018
    Publication date: April 23, 2020
    Inventors: Chishin HORI, Takamichi AOKI
  • Patent number: 10625098
    Abstract: A particle irradiation system includes three or more scanning magnets that scan a beam in a vertical direction (first direction) or a horizontal direction (second direction) perpendicular to each other. The three or more scanning magnets are configured such that the scanning magnets and the scanning magnets for scanning in the same direction between the vertical direction or the horizontal direction, are disposed in series on a progressing direction axis of a beam, and a volume of a magnetic field feeding region decreases as the scanning magnet is installed at a position farther from an isocenter on the progressing direction axis.
    Type: Grant
    Filed: April 24, 2019
    Date of Patent: April 21, 2020
    Assignee: Hitachi, Ltd.
    Inventors: Yuto Nakashima, Takamichi Aoki
  • Patent number: 10624201
    Abstract: Conventional cyclotrons have been incapable of changing energy of a beam to be extracted. Conventional synchrotrons have been difficult to output beams in a continuous manner. An accelerator has a dense region dense region in which orbits of different energies densely gather as a result of using a radiofrequency electric field to accelerate an ion orbiting in an isochronous magnetic field in order to cause a beam orbit to be displaced in a specific direction with increasing acceleration, and a sparse region in which orbits of different energies are sparsely discrete from each other. The accelerator has a feature that a magnetic field has a magnetic field gradient in a radial direction of a beam orbit in the dense region, and a product of a gradient of magnetic field gradient and a beam size passing through the dense region becomes smaller than the magnetic field gradient.
    Type: Grant
    Filed: February 1, 2017
    Date of Patent: April 14, 2020
    Assignee: Hitachi, Ltd.
    Inventors: Takamichi Aoki, Fuutarou Ebina, Yuto Nakashima
  • Patent number: 10548212
    Abstract: Ion beams are efficiently extracted with an accelerator that includes a circular vacuum container including a pair of circular return yokes facing each other. Six magnetic poles are radially disposed from the injection electrode at the periphery thereof in the return yoke. Six recessions are disposed alternately with the respective magnetic poles in the circumferential direction of the return yoke. In the vacuum container, a concentric trajectory region, in which multiple beam turning trajectories centered around the injection electrode are present, is formed, and an eccentric trajectory region, in which multiple beam turning trajectories eccentric from the injection electrode are present, is formed around the region. In the eccentric trajectory region, the beam turning trajectories are dense between the injection electrode and the inlet of the beam extraction path. Gaps between the beam turning trajectories are wide in a direction 180° opposite to the inlet of the beam extraction path.
    Type: Grant
    Filed: December 8, 2014
    Date of Patent: January 28, 2020
    Assignee: Hitachi, Ltd.
    Inventors: Takamichi Aoki, Fuutarou Ebina, Masumi Umezawa, Shigemitsu Hara, Hideaki Nishiuchi, Takayoshi Seki
  • Publication number: 20190329070
    Abstract: A particle irradiation system includes three or more scanning magnets that scan a beam in a vertical direction (first direction) or a horizontal direction (second direction) perpendicular to each other. The three or more scanning magnets are configured such that the scanning magnets and the scanning magnets for scanning in the same direction between the vertical direction or the horizontal direction, are disposed in series on a progressing direction axis of a beam, and a volume of a magnetic field feeding region decreases as the scanning magnet is installed at a position farther from an isocenter on the progressing direction axis.
    Type: Application
    Filed: April 24, 2019
    Publication date: October 31, 2019
    Inventors: Yuto NAKASHIMA, Takamichi AOKI
  • Patent number: 10456602
    Abstract: A particle therapy system capable of reducing the installation area and also suppressing a variation in the irradiation beam position is provided. A synchrotron generates a charged particle beam, and a beam delivery system irradiates an irradiation target with a charged particle beam extracted from the synchrotron thereby forming a radiation field. A rotating gantry is provided with the beam delivery system and is rotatable around the irradiation target. Dispersion measuring devices, each of which measures the dispersion of the charged particle beam at the position of the irradiation target at a plurality of rotation angles of the rotating gantry, are also provided. The orbit center of the charged particle beam extracted from the synchrotron and the rotation axis of the rotating gantry are located on substantially the same straight line.
    Type: Grant
    Filed: April 26, 2018
    Date of Patent: October 29, 2019
    Assignee: Hitachi, Ltd.
    Inventors: Fuutarou Ebina, Takamichi Aoki
  • Publication number: 20190239333
    Abstract: Provided is a variable energy and miniaturized accelerator. It is impossible to change the energy of the extraction beam in the related cyclotron or to miniaturize an accelerator in the related synchrotron. The accelerator includes a pair of magnets which form a magnetic field therebetween; an ion source which injects ions between the magnets; an acceleration electrode which accelerates the ions; and a beam extraction path which extracts the ions to the outside. A plurality of ring-shaped beam closed orbits formed by the pair of magnets, in which the ions of different energies respectively circulate, are aggregated on one side. The frequency of the radiofrequency electric field fed to the ions by the acceleration electrode is modulated by the beam closed orbits.
    Type: Application
    Filed: March 24, 2017
    Publication date: August 1, 2019
    Inventor: Takamichi AOKI