Patents by Inventor Akira Higuchi

Akira Higuchi 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: 20210362960
    Abstract: A movable object holding system for holding a movable object including a body portion 11 and a protruding portion protruding from the body portion, comprising a hand part 40 holding a movable object, the hand part 40 comprising plural guide portions limiting movement of the movable object in a first axis direction and a second axis direction that are perpendicular to each other and a pair of positioning portions 43e limiting movement of the movable object in a third axis direction that is perpendicular to the first and second axis directions, wherein the hand part 40 holds the movable object with the protruding portion of the movable object disposed in a space surrounded by the plural guide portions and touching the pair of the positioning portions 43e and with a part of the body portion of the movable object exposed out of the hand part 40.
    Type: Application
    Filed: April 30, 2021
    Publication date: November 25, 2021
    Inventors: Akira TSUNODA, Shinichi KAWABATA, Yuki HIGUCHI
  • Patent number: 11183942
    Abstract: A power conversion apparatus connectable in parallel to a second power conversion apparatus includes circuitry that generates a carrier wave, generates a pulse signal synchronized with the carrier wave, generates power that is based on a width of the pulse signal, obtains a monitor value corresponding to a circulating current circulating between the power conversion apparatus and the second power conversion apparatus, and based on the monitor value obtained while the power conversion circuitry is generating driving power, changes a period of the carrier wave to decrease the circulating current.
    Type: Grant
    Filed: November 1, 2019
    Date of Patent: November 23, 2021
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Kentaro Inomata, Akira Yamazaki, Masato Higuchi, Hidenori Hara
  • Publication number: 20210317601
    Abstract: A resin powder for solid freeform fabrication includes a particle having a pillar-like form, wherein the ratio of the height of the particle to the diameter or the long side of the bottom of the particle is 0.5 to 2.0, the particle has a 50 percent cumulative volume particle diameter of from 5 to 200 ?m, and the ratio (Mv/Mn) of the volume average particle diameter (Mv) to the number average particle diameter (Mn) of the particle is 2.00 or less.
    Type: Application
    Filed: June 14, 2021
    Publication date: October 14, 2021
    Inventors: Akira Saito, Shigenori Yaguchi, Yasuyuki Yamashita, Kiichi Kamoda, Yasuo Suzuki, Nozomu Tamoto, Hitoshi Iwatsuki, Shinzo Higuchi, Sohichiroh Iida
  • Patent number: 11146179
    Abstract: A device includes: a first power conversion circuitry configured to convert primary-side power into secondary-side power; and a control circuitry configured to: generate a command value associated with the secondary-side power; calculate a limited command value by modifying the command value so that the command value is equal to or less than a secondary-side limit, wherein the first power conversion circuitry is controlled based on the limited command value; transmit the limited command value to a second power conversion device comprising a second power conversion circuitry connected in parallel to the first power conversion circuitry; receive, from the second power conversion device, information indicating an adjustment value, wherein the adjustment value is added to the limited command value for controlling the second power conversion circuitry; and modify the secondary-side limit based on a difference between a primary-side limit associated with the primary-side power and the adjustment value.
    Type: Grant
    Filed: February 20, 2020
    Date of Patent: October 12, 2021
    Inventors: Akira Yamazaki, Kentaro Inomata, Masato Higuchi
  • Publication number: 20210283895
    Abstract: A resin powder for solid freeform fabrication, having a ratio (Mv/Mn) of 2.00 or less, where Mv represents a volume average particle diameter and Mn represents a number average particle diameter and a ratio of melt mass-flow rate B to melt mass-flow rate A of greater than 0.80 to 1.20, wherein the melt mass-flow rate A and the melt mass-flow rate B are respectively measured at 15 degrees C. higher than the melting point under a load of 2.16 kg according to JIS K7210 format before and after the resin powder is maintained at a temperature 15 degrees C. lower than the melting point under a pressure of 0.1 kPa for four hours.
    Type: Application
    Filed: June 1, 2021
    Publication date: September 16, 2021
    Inventors: Akira SAITO, Shigenori YAGUCHI, Yasuo SUZUKI, Nozomu TAMOTO, Shinzo HIGUCHI, Hitoshi IWATSUKI
  • Publication number: 20210285388
    Abstract: A valve gear includes a gear portion configured to rotate by drive torque transmitted from an actuator, a boss portion provided on the gear portion and having a cylindrical outer wall, and one or more extension portions extending in an axial direction from the gear portion on a radial outer side of the boss portion. A coiled spring including a first hook provided at end portion on a gear portion side, and a second hook provided at end portion on an opposite side to the gear portion so that the first hook and the second hook are respectively locked to each other on opposite sides in a circumferential direction of the extension portion. A valve gear subassembly formed by assembling the valve gear and the spring is housed in a valve gear accommodating chamber of the body, and the second hook of the spring is locked to the body.
    Type: Application
    Filed: June 3, 2021
    Publication date: September 16, 2021
    Inventors: Akira HIGUCHI, Kenichi ISHIHARA
  • Patent number: 11107597
    Abstract: A cask includes a cask body, an outer cylinder, a plurality of fins, and a plurality of neutron shields. The cask body has a tubular shape around a central axis and is capable of housing fuel assemblies. The outer cylinder has a tubular shape surrounding the cask body. The fins are aligned in a circumferential direction in a tubular space formed between the cask body and the outer cylinder, and connect an outer peripheral surface of the cask body and an inner peripheral surface of the outer cylinder to divide the tubular space into a plurality of divided spaces. The neutron shields contain a neutron shielding material with which the divided spaces are filled. Each neutron shield includes a void portion extending in the axial direction along the central axis. Accordingly, it is possible to reduce stress that may be exerted on the outer cylinder or other components by thermal expansion of the neutron shielding material when the fuel assemblies are housed in the cask.
    Type: Grant
    Filed: July 25, 2018
    Date of Patent: August 31, 2021
    Assignee: HITACHI ZOSEN CORPORATION
    Inventors: Akira Higuchi, Kenta Hamada, Hiroyuki Morita, Akihiro Shin
  • Publication number: 20200395501
    Abstract: Provided is a superluminescent diode including an optical waveguide body configured as a double heterostructure including an active layer and a first clad layer and a second clad layer interposing the active layer. When a direction perpendicular to both an optical waveguide direction of the optical waveguide body and a facing direction of the first clad layer and the second clad layer is set as a width direction, the active layer is provided with a limitation region extending along the optical waveguide direction and partitioning the active layer in the width direction. Carriers are less likely to be generated in the limitation region than in a region other than the limitation region in the active layer.
    Type: Application
    Filed: November 29, 2018
    Publication date: December 17, 2020
    Applicant: HAMAMATSU PHOTONICS K.K.
    Inventors: Masamichi YAMANISHI, Toru HIROHATA, Kazunori TANAKA, Kazuue FUJITA, Akira HIGUCHI
  • Patent number: 10840406
    Abstract: An optical semiconductor element includes: an optical waveguide body; a first electrode that is disposed on the second clad layer; a second electrode that is disposed on a second clad layer on one side of the first electrode in a light guiding direction of the optical waveguide body; a third electrode that is disposed on the second clad layer on the other side of the first electrode in the light guiding direction; and at least one fourth electrode that faces the first electrode, the second electrode, and the third electrode with the optical waveguide body interposed therebetween. The optical waveguide body includes a first separation region that electrically separates a first region under the first electrode from a second region under the second electrode and a second separation region that electrically separates the first region under the first electrode and a third region under the third electrode.
    Type: Grant
    Filed: February 23, 2018
    Date of Patent: November 17, 2020
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Masamichi Yamanishi, Akira Higuchi, Toru Hirohata, Kazunori Tanaka, Kazuue Fujita, Yasufumi Takagi, Yuta Aoki, Satoru Okawara
  • Publication number: 20200176144
    Abstract: A cask includes a cask body, an outer cylinder, a plurality of fins, and a plurality of neutron shields. The cask body has a tubular shape around a central axis and is capable of housing fuel assemblies. The outer cylinder has a tubular shape surrounding the cask body. The fins are aligned in a circumferential direction in a tubular space formed between the cask body and the outer cylinder, and connect an outer peripheral surface of the cask body and an inner peripheral surface of the outer cylinder to divide the tubular space into a plurality of divided spaces. The neutron shields contain a neutron shielding material with which the divided spaces are filled. Each neutron shield includes a void portion extending in the axial direction along the central axis. Accordingly, it is possible to reduce stress that may be exerted on the outer cylinder or other components by thermal expansion of the neutron shielding material when the fuel assemblies are housed in the cask.
    Type: Application
    Filed: July 25, 2018
    Publication date: June 4, 2020
    Inventors: Akira HIGUCHI, Kenta HAMADA, Hiroyuki MORITA, Akihiro SHIN
  • Publication number: 20200141511
    Abstract: When a rotating body is oriented at a default position due to the absence of a driving force, a first hook portion and a second hook portion are engaged with a fixed engagement portion and/or a movable engagement portion. When the rotating body is rotated from the default position by the driving force, the first hook portion is engaged with one of the fixed engagement portion and the movable engagement portion, and the second hook portion is engaged with the other of the fixed engagement portion and the movable engagement portion. A throttle valve device includes a pressing portion that presses the first hook portion and/or the second hook portion to apply a pressing force toward a center of a coil portion in a coil axial direction.
    Type: Application
    Filed: January 3, 2020
    Publication date: May 7, 2020
    Inventor: Akira HIGUCHI
  • Publication number: 20200131460
    Abstract: A culture apparatus includes a culture vessel including an internal space containing a culture solution in which a culture target is suspended, a gas supply apparatus supplying a single gas or a mixed gas to the internal space of the culture vessel, and an agitation apparatus agitating the culture solution by changing position and posture of the culture vessel. The agitation apparatus changes the position and posture of the culture vessel to circulate the culture solution in the internal space of the culture vessel so that a bottom surface of the internal space of the culture vessel is partially revealed and that the revealed portion transitions in a circulating direction R.
    Type: Application
    Filed: August 1, 2018
    Publication date: April 30, 2020
    Inventors: Akira HIGUCHI, Hiroyuki NAITO, Itsuro MOTEGI
  • Patent number: 10428889
    Abstract: A torsion spring that is used in a throttle valve device increasing and decreasing an opening degree of an intake passage or an exhaust passage of an internal-combustion engine includes: two coil springs connected with each other so that torsion directions are opposite from each other; and a hook disposed between the two coil springs. Of the two coil springs, one side spring arranged at one side in an axial direction biases a valve object to a closing side, and the other side spring arranged at the other side in the axial direction biases the valve object to an opening side. In at least one coil spring of the two coil springs, a dimension of a clearance between the at least one coil spring and the hook connected with each other is larger than an average value of clearances between coil turns of the at least one coil spring.
    Type: Grant
    Filed: September 19, 2016
    Date of Patent: October 1, 2019
    Assignee: DENSO CORPORATION
    Inventors: Akira Higuchi, Tohru Shimizu, Tadashi Komiyama
  • Patent number: 10404037
    Abstract: A semiconductor laser device of an embodiment comprises: a first electrode having an opening for passage of laser light and arranged on a main surface of a substrate; and a second electrode arranged on a back surface of the substrate. A stacked structural body including an active layer and a photonic crystal layer is arranged between the substrate and the first electrode, and a current confinement layer having an opening for passage of a current is arranged between the stacked structural body and the first electrode. A maximum width of the opening of the current confinement layer is smaller than a maximum width of the opening of the first electrode, and a whole region defined by the opening of the current confinement layer fits within a region defined by the opening of the first electrode as viewed from the first electrode side toward the second electrode side.
    Type: Grant
    Filed: July 5, 2018
    Date of Patent: September 3, 2019
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Akira Higuchi, Yoshitaka Kurosaka, Tadataka Edamura, Masahiro Hitaka
  • Publication number: 20190038206
    Abstract: [Problem] To provide a masticatory-function evaluation and management system capable of quickly counting “fine particles having been not crushed and ground finely” and quickly quantifying masticatory efficiency using photographic data of an artificial food mass in a stretched state, and capable of managing the masticatory efficiency quantified using such an artificial food mass for masticatory function evaluation along the time series. [Solution] When image data of an artificial food mass, in a stretched state, for masticatory function evaluation is received, the image data being transmitted from a user terminal, the number of fine particles having a spherical shape is counted from among all fine particles present in the image data, and masticatory efficiency is calculated on the basis of the number of the fine particles having the spherical shape.
    Type: Application
    Filed: January 24, 2017
    Publication date: February 7, 2019
    Applicant: Examastica Co.
    Inventors: Toru Nakamura, Koji Hayafune, Shinji Amaya, Akira Higuchi, Nobuo Satou
  • Publication number: 20190013647
    Abstract: A semiconductor laser device of an embodiment comprises: a first electrode having an opening for passage of laser light and arranged on a main surface of a substrate; and a second electrode arranged on a back surface of the substrate. A stacked structural body including an active layer and a photonic crystal layer is arranged between the substrate and the first electrode, and a current confinement layer having an opening for passage of a current is arranged between the stacked structural body and the first electrode. A maximum width of the opening of the current confinement layer is smaller than a maximum width of the opening of the first electrode, and a whole region defined by the opening of the current confinement layer fits within a region defined by the opening of the first electrode as viewed from the first electrode side toward the second electrode side.
    Type: Application
    Filed: July 5, 2018
    Publication date: January 10, 2019
    Applicant: HAMAMATSU PHOTONICS K.K.
    Inventors: Akira HIGUCHI, Yoshitaka KUROSAKA, Tadataka EDAMURA, Masahiro HITAKA
  • Publication number: 20180305650
    Abstract: A culture bag includes a culture portion which has a culture space configured to contain and culture a culture fluid. The culture space is an endless circumferential circulation space in which the culture fluid can circumferentially circulate. The culture fluid can continue to circumferentially circulate in one direction in the endless culture space. This suppresses complexification of flow of the culture fluid. As a result, bubbles can be suppressed from generating without decreasing culture efficiency.
    Type: Application
    Filed: November 25, 2016
    Publication date: October 25, 2018
    Inventors: Akira Higuchi, Hiroyuki Naito, Keiji Honjo, Toru Abiko, Kazuya Hayashibe, Yasuyuki Kudo, Hirokazu Odagiri
  • Publication number: 20180301591
    Abstract: An optical semiconductor element includes: an optical waveguide body; a first electrode that is disposed on a second clad layer; a second electrode that is disposed on the second clad layer on one side of the first electrode in a light guiding direction of the optical waveguide body; a third electrode that is disposed on the second clad layer on the other side of the first electrode in the light guiding direction; and at least one fourth electrode that faces the first electrode, the second electrode, and the third electrode with the optical waveguide body interposed therebetween. The optical waveguide body includes a first separation region that electrically separates a first region under the first electrode from a second region under the second electrode and a second separation region that electrically separates the first region under the first electrode and a third region under the third electrode.
    Type: Application
    Filed: February 23, 2018
    Publication date: October 18, 2018
    Applicant: HAMAMATSU PHOTONICS K.K.
    Inventors: Masamichi YAMANISHI, Akira HIGUCHI, Toru HIROHATA, Kazunori TANAKA, Kazuue FUJITA, Yasufumi TAKAGI, Yuta AOKI, Satoru OKAWARA
  • Publication number: 20180238409
    Abstract: A torsion spring that is used in a throttle valve device increasing and decreasing an opening degree of an intake passage or an exhaust passage of an internal-combustion engine includes: two coil springs connected with each other so that torsion directions are opposite from each other; and a hook disposed between the two coil springs. Of the two coil springs, one side spring arranged at one side in an axial direction biases a valve object to a closing side, and the other side spring arranged at the other side in the axial direction biases the valve object to an opening side. In at least one coil spring of the two coil springs, a dimension of a clearance between the at least one coil spring and the hook connected with each other is larger than an average value of clearances between coil turns of the at least one coil spring.
    Type: Application
    Filed: September 19, 2016
    Publication date: August 23, 2018
    Inventors: Akira HIGUCHI, Tohru SHIMIZU, Tadashi KOMIYAMA
  • Patent number: 9976492
    Abstract: A housing defines a bore in a tubular shape to draw intake air to an engine. A shaft is supported rotationally relative to the housing. A valve is located in the bore and affixed to the shaft. An electric actuator is configured to rotate one end of the shaft. A load generating unit is configured to apply a biasing load onto the shaft from the one end of the shaft toward the bore in a high-temperature state in which a temperature is higher than a predetermined temperature.
    Type: Grant
    Filed: January 13, 2016
    Date of Patent: May 22, 2018
    Assignee: DENSO CORPORATION
    Inventors: Takuma Uchida, Akira Higuchi, Yasushi Kawano