Patents by Inventor Hiroyuki Hirakawa

Hiroyuki Hirakawa 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: 20240132736
    Abstract: An object is to obtain a white ink which is easy to redisperse and is re-dispersible by being shaken several tens of times with weak force at most, or alternatively, without being shaken. As a solution, a white ink composition is provided which contains 50.0% by mass or less of a titanium oxide pigment treated with silica, alumina, and contains an organic compound in a solid content of the white ink composition, and contains 5.0 parts by mass or more of an alkali-soluble resin whose weight-average molecular weight is 28,000 to 100,000 relative to 100 parts by mass of the titanium oxide pigment, and further contains a water-dispersible resin and water.
    Type: Application
    Filed: November 16, 2021
    Publication date: April 25, 2024
    Inventors: Hiroyuki KONISHI, Yuya WATANABE, Ryuta NODA, Masaki MURAKAMI, Satoshi HIRAKAWA
  • Publication number: 20240124735
    Abstract: An object is to obtain an ink set capable of forming images of excellent image quality even when an acidic atmosphere, arising from use of a volatile acid in a pretreatment solution, is present in the vicinity of ink nozzles, etc. As a solution, an ink set containing a pretreatment solution and an ink composition is provided, wherein: the pretreatment solution contains an organic acid having a boiling point of 120° C. or lower at 1 atmospheric pressure; and the ink composition contains a pigment and an alkali-soluble resin having an acid value of 200 mgKOH/g or higher or crosslinked substance thereof accounting for 1.8% by mass or more in the ink composition, and further contains a water-dispersible resin and water.
    Type: Application
    Filed: November 12, 2021
    Publication date: April 18, 2024
    Inventors: Hiroyuki KONISHI, Ryuta NODA, Masaki MURAKAMI, Masahiro UEKI, Satoshi HIRAKAWA
  • Publication number: 20230187736
    Abstract: This metal-air battery module includes a metal-air battery cell, a plate member, and a pair of fixing members. The metal-air battery cell has a resin film provided with an opening, and a water-repellent film which is arranged and welded so as to cover the opening. The plate member is arranged facing the surface of the metal-air battery cell that is provided with the opening. The metal-air battery cell and the plate member are fixed by the pair of fixing members at a surface end in a surface direction, which is a direction along a surface in which both components face each other, the pair of fixing members being opposingly arranged so as to sandwich both components in the surface direction.
    Type: Application
    Filed: December 8, 2022
    Publication date: June 15, 2023
    Inventors: HIROYUKI HIRAKAWA, HIROTAKA MIZUHATA, SHUNSUKE SATA
  • Patent number: 11485950
    Abstract: The present invention provides a cell stimulation device capable of uniformly electrically stimulating cells intended to be electrically stimulated, and of preventing medium components from decomposing and depositing. [Solution] The cell stimulation device according to the present invention is intended to stimulate the cells being cultured in a culture medium, and is characterized in that the cell stimulation device includes an electron emission element for feeding electric charges to the culture medium via a gas phase, and an electric charge collecting electrode for collecting the electric charges from the culture medium, the electron emission element includes a lower electrode, a surface electrode, and an intermediate layer disposed between the lower electrode and the surface electrode, and the electric charge collecting electrode is disposed so as to be contactable with the culture medium.
    Type: Grant
    Filed: October 4, 2018
    Date of Patent: November 1, 2022
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Hiroyuki Hirakawa, Haruo Yamamoto, Tadashi Iwamatsu, Yasuhiro Sakamoto, Hiroyuki Yamaji, Kohji Shinkawa, Mai Takasaki, Shohei Komaru, Fumiaki Sugimori
  • Publication number: 20220294053
    Abstract: A metal-air battery includes a metal negative electrode, an air electrode, and a spacer interposed between the metal negative electrode and the air electrode 5. The spacer is composed of grip-shaped frameworks extended in a three-dimensional direction, and an electrolytic solution for filling a space between the frameworks.
    Type: Application
    Filed: February 15, 2022
    Publication date: September 15, 2022
    Inventors: FUMITOSHI SUGINO, HIROYUKI HIRAKAWA, HIROTAKA MIZUHATA
  • Publication number: 20220005609
    Abstract: A system for managing facilities comprises an acoustic event detector including an acoustic sensor for detecting an acoustic event in a compartment of a facility, a facility terminal electrically connected to the acoustic event detector, and an external server communicating with the facility terminal via a network. At least one of the facility terminal and the external server comprises a processor. The processor is configured to implement the steps of: extracting a respiratory disease symptom of a user in the facility from the detected acoustic event; assessing the respiratory disease symptom of the user to generate infection risk information associated with an infection risk of a next user expected to use the facility; and transmitting the infection risk information to at least one of an external user terminal, the external server, and a third party via the network. A method for managing facilities is also provided.
    Type: Application
    Filed: July 2, 2021
    Publication date: January 6, 2022
    Applicant: ASAHI KASEI KABUSHIKI KAISHA
    Inventors: Masahiro MORIZUMI, Takafumi HONJO, Hayato YABUKI, Hiroyuki HIRAKAWA
  • Publication number: 20210376334
    Abstract: A metal-air battery 1 includes an air electrode and a negative electrode. The negative electrode includes a collector carrying an active material thereon. The collector is formed by bending a plate with through holes in a wavy way, and a bending height of the collector in a thickness direction of the negative electrode is larger than a thickness of the plate.
    Type: Application
    Filed: April 30, 2021
    Publication date: December 2, 2021
    Inventors: HIROYUKI HIRAKAWA, HIROYUKI YAMAJI, MAI TAKASAKI, FUMITOSHI SUGINO, HIROTAKA MIZUHATA, SHINOBU TAKENAKA
  • Publication number: 20200255788
    Abstract: The present invention provides a cell stimulation device capable of uniformly electrically stimulating cells intended to be electrically stimulated, and of preventing medium components from decomposing and depositing. [Solution] The cell stimulation device according to the present invention is intended to stimulate the cells being cultured in a culture medium, and is characterized in that the cell stimulation device includes an electron emission element for feeding electric charges to the culture medium via a gas phase, and an electric charge collecting electrode for collecting the electric charges from the culture medium, the electron emission element includes a lower electrode, a surface electrode, and an intermediate layer disposed between the lower electrode and the surface electrode, and the electric charge collecting electrode is disposed so as to be contactable with the culture medium.
    Type: Application
    Filed: October 4, 2018
    Publication date: August 13, 2020
    Inventors: HIROYUKI HIRAKAWA, HARUO YAMAMOTO, TADASHI IWAMATSU, YASUHIRO SAKAMOTO, HIROYUKI YAMAJI, KOHJI SHINKAWA, MAI TAKASAKI, SHOHEI KOMARU, FUMIAKI SUGIMORI
  • Patent number: 10727021
    Abstract: An electron emission element (20) includes a first electrode (30a) and a second electrode (40) which are arranged facing each other, an intermediate layer (50) that is provided between the first electrode (30a) and the second electrode (40), and an insulating layer (60) that is formed with a thickness d1 on a substrate (30). A level difference between the insulating layer (60) and the first electrode (30a) is smaller than the thickness d1 of the insulating layer (60).
    Type: Grant
    Filed: July 14, 2017
    Date of Patent: July 28, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Katsumi Adachi, Hiroyuki Hirakawa, Tadashi Iwamatsu
  • Publication number: 20190157033
    Abstract: An electron emission element (20) includes a first electrode (30a) and a second electrode (40) which are arranged facing each other, an intermediate layer (50) that is provided between the first electrode (30a) and the second electrode (40), and an insulating layer (60) that is formed with a thickness d1 on a substrate (30). A level difference between the insulating layer (60) and the first electrode (30a) is smaller than the thickness d1 of the insulating layer (60).
    Type: Application
    Filed: July 14, 2017
    Publication date: May 23, 2019
    Inventors: KATSUMI ADACHI, HIROYUKI HIRAKAWA, TADASHI IWAMATSU
  • Patent number: 9184355
    Abstract: Provided are curable resin compositions capable of giving cured articles that have high light reflectivity, are satisfactorily resistant to heat and light, are tough, and less suffer from light reflectivity reduction with time. A curable resin composition for light reflection includes an alicyclic epoxy compound (A), rubber particles (B), a white pigment (C), a curing agent (D), and a curing accelerator (E). Another curable resin composition for light reflection includes an alicyclic epoxy compound (A), rubber particles (B), a white pigment (C), and a curing catalyst (F).
    Type: Grant
    Filed: June 18, 2012
    Date of Patent: November 10, 2015
    Assignee: DAICEL CORPORATION
    Inventors: Hiroyuki Hirakawa, Atsushi Sato
  • Patent number: 9056489
    Abstract: An optical scanning device includes a rotating polygon mirror, a motor, a substrate, a heat releasing member and a heat transfer member. The rotating polygon mirror deflection scans light emitting by a light source. The motor rotatively drives the rotating polygon mirror. The substrate has a drive circuit part for controlling the motor. The heat releasing member releases heat generated from the substrate. The heat transfer member is sandwiched between the substrate and the heat releasing member to be compressively deformed. A receiving portion that part of the heat transfer member compressively deformed enters is formed in a first part of the heat releasing member in which the heat transfer member is provided.
    Type: Grant
    Filed: March 24, 2014
    Date of Patent: June 16, 2015
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Hiroyuki Hirakawa
  • Patent number: 8928722
    Abstract: An optical scanning device includes a housing, a laser light source outputting a laser light, a polygon mirror arranged in an arrangement space and deflecting the laser light to scan a predetermined object with the laser light while rotating, a polygon motor rotating the polygon mirror, a control board arranged in the arrangement space and controlling the polygon motor, and a flow-control member arranged in the arrangement space and guiding an airflow generated by a rotation of the polygon mirror to an outside of the arrangement space to circulate the airflow within the housing.
    Type: Grant
    Filed: January 20, 2011
    Date of Patent: January 6, 2015
    Assignee: Kyocera Mita Corporation
    Inventor: Hiroyuki Hirakawa
  • Patent number: 8923723
    Abstract: The developing device of the present disclosure comprises a developing container, toner carrier, developer carrier, regulating member, and air outflow channel. The developing container accommodates a two-component developer. The toner carrier supplies toner to an image carrier. The developer carrier rotates so that a surface facing the toner carrier moves in the opposite direction of the toner carrier, and a toner layer is formed on the toner carrier. The regulating member regulates the amount of developer carried on the developer carrier. The air outflow channel communicates an airflow outlet formed in the top end of the developing container facing the toner carrier with the interior of a duct placed above the developing container, and the air outflow channel is inclined downstream in the rotational direction of the toner carrier relative to a straight line passing through the rotational axis center of the toner carrier and the airflow outlet.
    Type: Grant
    Filed: November 2, 2012
    Date of Patent: December 30, 2014
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Hiroyuki Hirakawa, Eiji Tatsumi, Kenshi Matsui
  • Patent number: 8891998
    Abstract: An image forming apparatus according to the present disclosure includes a fan, a first louver, and a second louver. The first louver includes first rectifier vanes that direct airflow produced by the fan. The second louver is located on an inner side of an apparatus body with respect to the first louver and faces the first louver in such a manner as to overlap the first louver in a direction of an axis of rotation of the fan. The second louver includes second rectifier vanes that direct the airflow produced by the fan. Each of the first rectifier vanes and a corresponding one of the second rectifier vanes that is adjacent thereto extend in one plane inclining at a specific angle with respect to the axis of rotation of the fan.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: November 18, 2014
    Assignee: Kyocera Document Solutions Inc.
    Inventors: Hiroyuki Hirakawa, Keiichi Tanida
  • Patent number: 8860293
    Abstract: The present invention provides an electron emitting element, comprising: a first electrode; an insulating layer formed on the first electrode and having an opening of through hole; a second electrode formed on the insulating layer, the second electrode being disposed so as to cover at least the opening and face the first electrode via the opening; and a fine particle layer disposed between the first electrode and the second electrode, the fine particle layer being composed of insulating fine particles and conductive fine particles, wherein the insulating layer is disposed between the first electrode and the fine particle layer, or between the second electrode and the fine particle layer, when a voltage is applied between the first electrode and the second electrode, electrons are emitted from the first electrode and accelerated in the fine particle layer to pass through the second electrode.
    Type: Grant
    Filed: April 14, 2011
    Date of Patent: October 14, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Hiroyuki Hirakawa
  • Publication number: 20140292995
    Abstract: An optical scanning device includes a rotating polygon mirror, a motor, a substrate, a heat releasing member and a heat transfer member. The rotating polygon mirror deflection scans light emitting by a light source. The motor rotatively drives the rotating polygon mirror. The substrate has a drive circuit part for controlling the motor. The heat releasing member releases heat generated from the substrate. The heat transfer member is sandwiched between the substrate and the heat releasing member to be compressively deformed. A receiving portion that part of the heat transfer member compressively deformed enters is formed in a first part of the heat releasing member in which the heat transfer member is provided.
    Type: Application
    Filed: March 24, 2014
    Publication date: October 2, 2014
    Applicant: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventor: Hiroyuki HIRAKAWA
  • Patent number: 8779059
    Abstract: An optical semiconductor sealing resin composition includes a rubber-particle-dispersed epoxy resin (A) containing an alicyclic epoxy resin and, dispersed therein, rubber particles, in which the rubber particles comprise a polymer including one or more (meth)acrylic esters as essential monomeric components and have a hydroxyl group and/or a carboxyl group in a surface layer thereof as a functional group capable of reacting with the alicyclic epoxy resin, the rubber particles have an average particle diameter of 10 nm to 500 nm and a maximum particle diameter of 50 nm to 1000 nm, and the difference in refractive index between the rubber particles and a cured article obtained from the optical semiconductor sealing resin composition is within ±0.02. The optical semiconductor sealing resin composition can give a cured article which exhibits excellent cracking resistance while maintaining satisfactory thermal stability and high transparency.
    Type: Grant
    Filed: July 22, 2009
    Date of Patent: July 15, 2014
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Atsushi Sato, Hiroyuki Hirakawa
  • Patent number: 8760056
    Abstract: The present invention provides an electron emitting element, comprising: a first electrode; an insulating fine particle layer formed on the first electrode and composed of insulating fine particles; and a second electrode formed on the insulating fine particle layer, wherein the insulating fine particle layer is provided with recesses formed in a surface thereof, the surface facing the second electrode, the recesses each having a depth smaller than a thickness of the insulating fine particle layer, and when a voltage is applied between the first electrode and the second electrode, electrons provided from the first electrode are accelerated in the insulating fine particle layer to be emitted though the second electrode.
    Type: Grant
    Filed: February 23, 2011
    Date of Patent: June 24, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kanako Hirata, Hiroyuki Hirakawa, Ayae Nagaoka, Yasuo Imura, Tadashi Iwamatsu
  • Patent number: 8741525
    Abstract: The resin coated carrier is used with a toner in which an external additive having an average primary particle size of 50 nm or more is added to a toner particle, and has a carrier core and a resin coating layer on the surface of the carrier core. In the resin coated carrier, the following expression (1) is satisfied: 0.5??log {(A/C)/(B/C)}?2.5??(1) wherein A represents a volume resistance value (?/cm) of the resin coated carrier in an electric field of 1000 V/cm that is obtained by conducting a stirring test, B represents a volume resistance value (?/cm) of the resin coated carrier in an electric field of 1000 V/cm before the stirring test, and C represents a volume resistance value (?/cm) of the carrier core in an electric field of 1000 V/cm.
    Type: Grant
    Filed: July 1, 2009
    Date of Patent: June 3, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Osamu Wada, Takanori Kamoto, Tadashi Iwamatsu, Nobuyuki Yoshioka, Hiroyuki Hirakawa, Yoshinori Mutoh, Takashi Hara, Hirofumi Kanda, Yoshio Ichii