Patents by Inventor Hiroshi Ishikawa

Hiroshi 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).

  • Patent number: 11656015
    Abstract: A refrigeration cycle apparatus is a refrigeration cycle apparatus having a refrigerant circuit having a compressor, a condenser, a supercooler, an expansion device, and an evaporator connected by a refrigerant pipe, and configured to circulate refrigerant containing refrigerant having a temperature gradient, wherein the supercooler sets a degree of supercooling of the refrigerant, which is a temperature difference between a temperature from the condenser to a refrigerant flow inlet of the supercooler and a temperature in a refrigerant flow outlet on a downstream side of the supercooler, to be larger than the temperature gradient generated at a time of refrigerant shortage of the refrigerant between the refrigerant flow inlet and the refrigerant flow outlet of the supercooler, the refrigeration cycle apparatus including a refrigerant amount determination unit configured to compare a determination threshold value set to a value larger than the temperature gradient of the refrigerant with the degree of supercoo
    Type: Grant
    Filed: September 14, 2017
    Date of Patent: May 23, 2023
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroshi Sata, Tomotaka Ishikawa
  • Publication number: 20230027963
    Abstract: A signal transmission cable is provided with a conductor, an insulator covering around the conductor, a shield layer covering around the insulator, a sheath covering around the shield layer, and a plating base layer is provided between the insulator and the shield layer to cover around the insulator. The shield layer has a plating layer provided to cover the plating base layer to be in contact with an outer peripheral surface of the plating base layer. A surface roughness of an outer peripheral surface of the plating layer is less than a surface roughness of an inner peripheral surface of the plating layer.
    Type: Application
    Filed: July 7, 2022
    Publication date: January 26, 2023
    Inventors: Hideyuki Sagawa, Detian Huang, Takahiro Sugiyama, Hideki Nonen, Masashi Arai, Hiroshi Ishikawa, Xinweilong Li
  • Publication number: 20220394652
    Abstract: Methods and devices provide for enhancements to the Steering of Roaming (SoR) provisioning during the registration procedure by introducing a new parameter generated by a user data management network function of the home network which indicates to roaming networks whether to request updated SoR information based on a registration type received in a registration request from a mobile terminal.
    Type: Application
    Filed: October 29, 2020
    Publication date: December 8, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Srisakul Thakolsri, Malla Reddy Sama, Riccardo Guerzoni, Jari Mutikainen, Hiroshi Ishikawa, Atsushi Minokuchi, Ban Al-Bakri
  • Patent number: 11493705
    Abstract: A connection structure of optical waveguide chips includes a base substrate (2003) in which grooves (2013) are formed, spacer optical fibers (2006) each disposed for a corresponding one of the grooves (2013) and fitted in the groove (2013) while partially projecting from the base substrate (2003), and silica-based PLCs (2001, 2002) that are a plurality of optical waveguide chips in each of which grooves (2007) fitted on the projecting portions of the spacer optical fibers (2006) are formed at positions of an optical waveguide layer (2008) facing the grooves (2013), and each of which is mounted on the base substrate (2003) while being supported by the spacer optical fibers (2006). The silica-based PLCs (2001, 2002) are mounted on the base substrate (2003) such that incident/exit end faces of the optical waveguide layers (2008) face each other.
    Type: Grant
    Filed: April 16, 2021
    Date of Patent: November 8, 2022
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Kota Shikama, Hiroshi Ishikawa, Yuko Kawajiri, Atsushi Aratake
  • Patent number: 11493413
    Abstract: A testing method of thermal barrier coating (TBC) is for evaluating the presence or absence of damage to TBC formed on a bending part on which compression stress acts. The method includes a test piece that includes a pair of arm parts, a bending part arranged between the pair of arm parts, and a TBC layer on a bending surface of the bending part; attaching the test piece to a compression testing device after preparing the test piece; and applying compression stress to the test piece in a direction for bringing the pair of arm parts close together after attaching the test piece with the compression testing device. The pair of arm parts are arranged so as to separate from each other from base end portions toward front end portions of the arm parts. The bending part is arranged between the base end portions.
    Type: Grant
    Filed: December 26, 2017
    Date of Patent: November 8, 2022
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Yoshifumi Okajima, Taiji Torigoe, Hiroshi Ishikawa, Hitoshi Tamaki, Kazuma Takeno
  • Publication number: 20220350084
    Abstract: An embodiment optical coupling structure includes: at least one optical element; at least one optical fiber which has an end surface facing the optical element; and an adhesive agent which is applied to at least the end surface and a part of the optical element so as to optically and mechanically couple the optical element and the optical fiber, wherein both a contact angle which a surface of the optical element and a surface of the adhesive agent make and a contact angle which a surface of the optical fiber and the surface of the adhesive agent make are less than 90 degrees. With such a configuration, alignment between the optical element and the optical fiber can be realized by passive alignment so that a mounting time and a mounting cost in coupling the optical element and the optical fiber can be reduced.
    Type: Application
    Filed: June 21, 2019
    Publication date: November 3, 2022
    Applicant: Nippon Telegraph and Telephone Corporation
    Inventors: Hiroshi Ishikawa, Makoto Abe, Norio Sato, Atsushi Aratake
  • Patent number: 11479399
    Abstract: There is provided a container that makes it possible to suppress intrusion of bacteria from the tip of a pleat part into the inside of the container. The container includes: a main body that includes a body part defining a containing portion and a flange part extending outward from an upper portion of the body part; and a lid that is joined to the flange part of the main body via an outer edge seal portion so as to cover the containing portion, the lid being formed by a lid member folded back at a fold-back portion such that portions of the lid member overlap each other. The lid has: a pleat part that includes the portions of the lid member overlapping each other and that extends from an edge of one side to an edge of the other side of the lid in a first direction; and a first lid part and a second lid part that are formed by the lid member and that are arranged on opposite sides of the pleat part.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: October 25, 2022
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Makiko Takahashi, Kaoru Watanabe, Hiroshi Ishikawa, Satoshi Takimoto
  • Patent number: 11480732
    Abstract: An optical connection structure includes a PLC that is an optical waveguide chip including an optical waveguide and at least one groove formed on a substrate, and at least one optical fiber that is fitted into the at least one groove of the PLC. The PLC includes the optical waveguide, at least one grating coupler that is optically connected to the optical waveguide, and the at least one groove formed at a position in a vicinity of the at least one grating coupler in a cladding layer in which the optical waveguide is formed. An optical fiber of the at least one optical fiber is fitted into a groove of the at least one groove such that an end surface of the optical fiber is located in a vicinity of a grating coupler of the at least one grating coupler, the optical fiber being optically connected to the grating coupler.
    Type: Grant
    Filed: November 19, 2019
    Date of Patent: October 25, 2022
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Hiroshi Ishikawa, Kota Shikama, Yuko Kawajiri, Atsushi Aratake
  • Publication number: 20220317387
    Abstract: An optical waveguide alignment method includes a step of covering an end portion of an optical fiber, an end portion of a PLC, and a microlens with an adhesive before curing in a state in which at least one microlens is disposed between incidence and emission end faces of end portions of the optical fiber and the PLC, a step of causing light for alignment to be incident on at least one of the optical fiber or the PLC so that light enters a portion covered with the adhesive between the optical fiber and the PLC, and a step of curing the adhesive after the microlens moves onto an optical path between the optical fiber and the PLC due to radiation pressure of light. The optical fiber and the PLC are optically connected via the adhesive and the microlens, and the optical fiber, the PLC, and the microlens are mechanically connected by the adhesive.
    Type: Application
    Filed: July 18, 2019
    Publication date: October 6, 2022
    Inventors: Hiroshi Ishikawa, Makoto Abe, Norio Sato, Atsushi Aratake
  • Patent number: 11456091
    Abstract: A multi-core cable includes a heat detection line including a twisted pair wire composed of a pair of heat detecting wires being twisted together, each of which includes a first conductor and a first insulator covering a periphery of the first conductor, a plurality of electric wires spirally twisted around the heat detection line, each of which includes a second conductor and a second insulator covering a periphery of the second conductor, and a sheath covering the heat detection line and the plurality of electric wires together. A melting point of the first insulator is lower than a melting point of the second insulator. The second conductor has a shape in a cross-section perpendicular to a cable longitudinal direction in which a width along a circumferential direction is gradually increased from a radially inward portion to a radially outward portion.
    Type: Grant
    Filed: July 30, 2021
    Date of Patent: September 27, 2022
    Assignee: HITACHI METALS, LTD.
    Inventors: Detian Huang, Yoshinori Tsukamoto, Masashi Moriyama, Takahiro Sugiyama, Hiroshi Ishikawa, Hideki Nonen
  • Patent number: 11453929
    Abstract: There are provided an apparatus for cooling a rail and a method for manufacturing a rail, capable of inexpensively manufacturing a rail with high hardness and high toughness. The apparatus for cooling a rail, configured to jet a cooling medium to the head portion and foot portion of a rail in an austenite temperature range to forcibly cool the rail, includes: a first cooling unit including plural first cooling headers configured to jet the cooling medium as gas to the head top face and head side of the head portion, and first driving units configured to move at least one first cooling header of the plural first cooling headers to change the jet distance of the cooling medium jetted from the first cooling header; and a second cooling unit including a second cooling header configured to jet the cooling medium as gas to the foot portion.
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: September 27, 2022
    Assignee: JFE Steel Corporation
    Inventors: Kenji Okushiro, Hideo Kijima, Hiroshi Ishikawa
  • Publication number: 20220285049
    Abstract: A signal transmission cable includes at least one internal conductor, an insulator, and an external conductor. The at least one internal conductor is formed in an elongated shape and is configured to transmit a signal. The insulator covers the internal conductor. The external conductor is a band-shaped resin tape having characteristics of an elongation percentage of equal to or more than 30% and a volume resistivity of equal to or less than 4×10?4 ?·cm. The external conductor is configured to be wound around the insulator.
    Type: Application
    Filed: March 1, 2022
    Publication date: September 8, 2022
    Inventors: Hideki Nonen, Hiroshi Ishikawa
  • Publication number: 20220276435
    Abstract: A wavelength checker includes an optical converter composed of a conversion material that converts infrared light into visible light. The optical converter is disposed, on an output side (side from which light is output to an external space) of a plurality of first output waveguides of an optical waveguide chip, to receive emitted light that is guided through the first output waveguides and reflected on and emitted from the light emitting-side end surface. The light emitting-side end surface is a reflection surface that is inclined to face a main substrate.
    Type: Application
    Filed: August 23, 2019
    Publication date: September 1, 2022
    Inventors: Takuya Tanaka, Hiroshi Ishikawa, Kota Shikama, Atsushi Aratake
  • Publication number: 20220269020
    Abstract: A photoelectric fiber includes a fiber including a core through which light is guided; an electrical unit formed continuously with the fiber, the electrical unit being configured to house a photoelectric conversion chip including a photoelectric conversion element; and an external electrode formed on a front surface of at least one of the fiber or the electrical unit, wherein the photoelectric conversion chip is optically connected to the core and electrically connected to the external electrode.
    Type: Application
    Filed: July 18, 2019
    Publication date: August 25, 2022
    Inventors: Norio Sato, Atsushi Aratake, Makoto Abe, Takuya Tanaka, Kota Shikama, Takao Fukumitsu, Hiroshi Ishikawa
  • Publication number: 20220258217
    Abstract: Provided is a substrate cleaning device, an abnormality determination method of a substrate cleaning device, and an abnormality determination program of a substrate cleaning device for determining whether there is an abnormality in a roll cleaning member that is attached. A substrate cleaning device includes: a holder to which a roll cleaning member for cleaning a substrate is attached in a detachable manner; a rotation device which makes the roll cleaning member attached to the holder rotate; a sensor which measures information concerning a vibration of the roll cleaning member during rotation; and a control device which determines, based on a measurement result of the sensor, whether there is an abnormality in the roll cleaning member attached to the holder.
    Type: Application
    Filed: February 14, 2022
    Publication date: August 18, 2022
    Applicant: EBARA CORPORATION
    Inventors: MASUMI NISHIJIMA, KUNIMASA MATSUSHITA, HIROSHI ISHIKAWA
  • Patent number: 11416986
    Abstract: Aspects of the invention include a computer implemented method for simulating visual field test results from structural scans, the method includes processing eye image data to extract visual functioning related features. Additionally, generating a representation of a visual function of the eye that is independent of a visual field test (VFT) configuration. Then generating a simulated VFT configuration specific test result based at least in part on the representation.
    Type: Grant
    Filed: April 13, 2020
    Date of Patent: August 16, 2022
    Assignees: INTERNATIONAL BUSINESS MACHINES CORPORATION, NEW YORK UNIVERSITY
    Inventors: Hsin-Hao Yu, Stefan Renard Maetschke, Suman Sedai, Bhavna Josephine Antony, Rahil Garnavi, Hiroshi Ishikawa
  • Publication number: 20220244468
    Abstract: An embodiment optical connector includes a fiber having a core through which light is guided and a magnet attached to one end of the fiber, and the magnet has an opening that exposes at least the end face of the core. An embodiment optical connection structure includes a first optical connector and a second optical connector, each including a fiber having a core through which light is guided and a magnet attached to one end of the fiber, wherein the magnets are magnetized so as to exert attraction on each other, and when the first optical connector and the second optical connector are mechanically connected by magnetic forces, the core of the first optical connector and the core of the second optical connector are optically connected through the opening of the magnet of the first optical connector and the opening of the magnet of the second optical connector.
    Type: Application
    Filed: June 25, 2019
    Publication date: August 4, 2022
    Inventors: Norio Sato, Satoshi Shigematsu, Hiroshi Ishikawa, Kota Shikama, Atsushi Aratake
  • Patent number: 11402120
    Abstract: An air circulator includes a blower unit that is provided with an airflow opening on its front side, and a support unit that supports the blower unit. A grill is provided in the airflow opening. The grill is provided with plural airflow guide blades in a spiral manner. Inner end portions thereof closer to the center of the spiral of the airflow guide blades are protruded from outer end portions thereof in an airflow direction. The blower unit has a cover for forming an outer panel thereof, and the cover has a spherical shape.
    Type: Grant
    Filed: October 27, 2020
    Date of Patent: August 2, 2022
    Assignee: IRIS OHYAMA INC.
    Inventors: Hideki Yamamoto, Kazuhito Fukumasu, Hiroshi Ishikawa
  • Patent number: 11385409
    Abstract: A connection structure for optical waveguide chips includes a silica-based PLC in which grooves are formed, spacer steel balls fitted in the grooves, and silica-based PLCs in which grooves into which the spacer steel balls to be fitted are formed, the silica-based PLCs being mounted on the silica-based PLC by being supported by the spacer steel balls. A conductor wire formed in the silica-based PLC and a conductor wire formed in the silica-based PLC are electrically connected to each other by a conductor film formed in the groove, the spacer steel balls and a conductor film formed in the groove.
    Type: Grant
    Filed: May 24, 2019
    Date of Patent: July 12, 2022
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Hiroshi Ishikawa, Kota Shikama, Yuko Kawajiri, Atsushi Aratake
  • Publication number: 20220211764
    Abstract: The present disclosure relates to a neural cell population, a neural cell-containing preparation, and a method for producing the population and preparation. More particularly, the present invention relates to a neural cell population derived from intraoral mesenchymal cells, wherein a proportion of normal diploid cells is 80% or more, a preparation containing the neural cell population, and a method for producing the population and the preparation.
    Type: Application
    Filed: May 14, 2020
    Publication date: July 7, 2022
    Applicant: UNIVERSITY OF TSUKUBA
    Inventors: Aiki MARUSHIMA, Akira MATSUMURA, Hiroki BUKAWA, Masao KODA, Hiroshi ISHIKAWA, Akihiro OHYAMA, Junko TOYOMURA, Yuji MATSUMARU, Hideaki MATSUMURA, Miho WATANABE