Patents by Inventor Hiroyuki Mitsuya

Hiroyuki Mitsuya 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: 10840827
    Abstract: A vibration energy harvester includes: a first electrode; and a second electrode that can be displaced relative to the first electrode along a predetermined vibrating direction. At least either of a surface of the first electrode and a surface of the second electrode facing opposite each other is electrically charged. Power is generated as the second electrode becomes displaced causing a change in electrostatic capacitance between the first electrode and the second electrode. A range having included therein at least a vibrational center of the second electrode, over which the electrostatic capacitance remains unchanged even as the second electrode is displaced, is set.
    Type: Grant
    Filed: September 27, 2016
    Date of Patent: November 17, 2020
    Assignees: The University of Tokyo, Saginomiya Seisakusho, Inc.
    Inventors: Hiroshi Toshiyoshi, Hiroyuki Fujita, Hisayuki Ashizawa, Hiroyuki Mitsuya, Kazunori Ishibashi
  • Patent number: 10833607
    Abstract: An electret element includes: an Si layer, an SiO2 layer formed at a surface of the Si layer; and an electret formed at the SiO2 layer near an interface of the SiO2 layer and the Si layer.
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: November 10, 2020
    Assignees: The University of Tokyo, Saginomiya Seisakusho, Inc.
    Inventors: Hiroyuki Fujita, Gen Hashiguchi, Hisayuki Ashizawa, Hiroyuki Mitsuya, Kazunori Ishibashi
  • Patent number: 10566912
    Abstract: A vibration-driven energy harvester includes: a fixed electrode; a movable electrode that is disposed so as to face opposite the fixed electrode and is allowed to move relative to the fixed electrode; and an ionic liquid disposed between the fixed electrode and the movable electrode which face opposite each other, wherein: power is generated as an external vibration moves the movable electrode, causing a change in at least one of an area of an electrical double layer formed on two sides of an interface of the fixed electrode and the ionic liquid and an area of an electrical double layer formed on two sides of an interface of the movable electrode and the ionic liquid.
    Type: Grant
    Filed: February 9, 2015
    Date of Patent: February 18, 2020
    Assignees: The University of Tokyo, Saginomiya Seisakusho, Inc.
    Inventors: Hiroyuki Fujita, Hiroyuki Mitsuya
  • Patent number: 10340818
    Abstract: An actuator includes: an electrostatic actuation mechanism including a stationary electrode and a movable electrode; a first movable part driven by the electrostatic actuation mechanism; a first elastic support part that elastically supports the first movable part; an electret formed in at least one of the stationary electrode and the movable electrode; and a drive control unit that controls application of voltage to the electrostatic actuation mechanism. In the actuator a plurality of stable states are set in which the first movable part is positioned at a stable position at which an electrostatic force generated by the electret matches with an elastic force exerted by the first elastic support part or at a stable position near such stable position. By applying a voltage to the electrostatic actuation mechanism, the first movable part may be displaced from any stable position to another stable position.
    Type: Grant
    Filed: July 30, 2014
    Date of Patent: July 2, 2019
    Assignees: National University Corporation Shizuoka University, OMRON Corporation, KABUSHIKI KAISHA SAGINOMIYA SEISAKUSHO
    Inventors: Masato Suzuki, Akito Mori, Gen Hashiguchi, Tatsuhiko Sugiyama, Hiroshi Imamoto, Masatoshi Oba, Hiroyuki Mitsuya, Hisayuki Ashizawa, Kazunori Ishibashi
  • Patent number: 10309379
    Abstract: A vibration energy harvester includes: a pair of electrodes provided so as to face opposite each other, with at least one of the pair of electrodes allowed to move; and an ion gel provided between the pair of electrodes, which is formed by using an ionic liquid, wherein: as an external vibration causes the electrode to move along a direction in which a distance between the pair of electrodes changes, power is generated through a change in an area of an electric double layer formed on two sides of an interface of each electrode and the ion gel.
    Type: Grant
    Filed: January 14, 2016
    Date of Patent: June 4, 2019
    Assignees: The University of Tokyo, Saginomiya Seisakusho, Inc., Central Research Institute of Electric Power Industry
    Inventors: Hiroyuki Fujita, Hiroyuki Mitsuya, Shimpei Ono
  • Publication number: 20190058420
    Abstract: A vibration energy harvester includes: a first electrode; and a second electrode that can be displaced relative to the first electrode along a predetermined vibrating direction. At least either of a surface of the first electrode and a surface of the second electrode facing opposite each other is electrically charged. Power is generated as the second electrode becomes displaced causing a change in electrostatic capacitance between the first electrode and the second electrode. A range having included therein at least a vibrational center of the second electrode, over which the electrostatic capacitance remains unchanged even as the second electrode is displaced, is set.
    Type: Application
    Filed: September 27, 2016
    Publication date: February 21, 2019
    Inventors: Hiroshi TOSHIYOSHI, Hiroyuki FUJITA, Hisayuki ASHIZAWA, Hiroyuki MITSUYA, Kazunori ISHIBASHI
  • Patent number: 9915576
    Abstract: A pressure sensor includes: a fixed part; a ring-like oscillator that is supported on the fixed part by a plurality of support beams; a plurality of electrodes that are provided on the fixed part and arranged in an oscillating direction of the ring-like oscillator with a gap; electret films that are formed on either one of opposite surfaces of the ring-like oscillator and the electrodes.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: March 13, 2018
    Assignees: The University of Tokyo, Kabushiki Kaisha Saginomiya Seisakusho
    Inventors: Hiroyuki Fujita, Gen Hashiguchi, Hiroyuki Mitsuya, Hisayuki Ashizawa
  • Publication number: 20180041140
    Abstract: An electret element includes: an Si layer, an SiO2 layer formed at a surface of the Si layer; and an electret formed at the SiO2 layer near an interface of the SiO2 layer and the Si layer.
    Type: Application
    Filed: February 9, 2016
    Publication date: February 8, 2018
    Inventors: Hiroyuki FUJITA, Gen HASHIGUCHI, Hisayuki ASHIZAWA, Hiroyuki MITSUYA, Kazunori ISHIBASHI
  • Publication number: 20170370352
    Abstract: A vibration energy harvester includes: a pair of electrodes provided so as to face opposite each other, with at least one of the pair of electrodes allowed to move; and an ion gel provided between the pair of electrodes, which is formed by using an ionic liquid, wherein: as an external vibration causes the electrode to move along a direction in which a distance between the pair of electrodes changes, power is generated through a change in an area of an electric double layer formed on two sides of an interface of each electrode and the ion gel.
    Type: Application
    Filed: January 14, 2016
    Publication date: December 28, 2017
    Inventors: Hiroyuki FUJITA, Hiroyuki MITSUYA, Shimpei ONO
  • Patent number: 9726563
    Abstract: A device member including a cavity, includes a base member, an interlayer, an upper layer, an opening portion, and a gas-permeable sealing layer. The base member includes a first semiconductor. The interlayer is formed on the base member and is non-conductive. The upper layer is formed on the interlayer and includes a second semiconductor. The opening portion is formed at the upper layer. The gas-permeable sealing layer is formed to seal the opening portion formed at the upper layer. The cavity is formed by removing the interlayer with an etching gas that penetrates through the sealing layer.
    Type: Grant
    Filed: June 18, 2013
    Date of Patent: August 8, 2017
    Assignees: THE UNIVERSITY OF TOKYO, KABUSHIKI KAISHA SAGINOMIYA SEISAKUSHO
    Inventors: Hiroyuki Fujita, Hiroshi Toshiyoshi, Hiroyuki Mitsuya
  • Publication number: 20170019034
    Abstract: A vibration-driven energy harvester includes: a fixed electrode; a movable electrode that is disposed so as to face opposite the fixed electrode and is allowed to move relative to the fixed electrode; and an ionic liquid disposed between the fixed electrode and the movable electrode which face opposite each other, wherein: power is generated as an external vibration moves the movable electrode, causing a change in at least one of an area of an electrical double layer formed on two sides of an interface of the fixed electrode and the ionic liquid and an area of an electrical double layer formed on two sides of an interface of the movable electrode and the ionic liquid.
    Type: Application
    Filed: February 9, 2015
    Publication date: January 19, 2017
    Inventors: Hiroyuki FUJITA, Hiroyuki MITSUYA
  • Publication number: 20160282209
    Abstract: A pressure sensor includes: a fixed part; a ring-like oscillator that is supported on the fixed part by a plurality of support beams; a plurality of electrodes that are provided on the fixed part and arranged in an oscillating direction of the ring-like oscillator with a gap; electret films that are formed on either one of opposite surfaces of the ring-like oscillator and the electrodes.
    Type: Application
    Filed: September 29, 2014
    Publication date: September 29, 2016
    Applicants: THE UNIVERSITY OF TOKYO, KABUSHIKI KAISKA SAGINOMIYA SEISAKUSHO
    Inventors: Hiroyuki FUJITA, Gen HASHIGUCHI, Hiroyuki MITSUYA, Hisayuki ASHIZAWA
  • Publication number: 20160204716
    Abstract: An actuator includes: an electrostatic actuation mechanism including a stationary electrode and a movable electrode; a first movable part driven by the electrostatic actuation mechanism; a first elastic support part that elastically supports the first movable part; an electret formed in at least one of the stationary electrode and the movable electrode; and a drive control unit that controls application of voltage to the electrostatic actuation mechanism. In the actuator a plurality of stable states are set in which the first movable part is positioned at a stable position at which an electrostatic force generated by the electret matches with an elastic force exerted by the first elastic support part or at a stable position near such stable position. By applying a voltage to the electrostatic actuation mechanism, the first movable part may be displaced from any stable position to another stable position.
    Type: Application
    Filed: July 30, 2014
    Publication date: July 14, 2016
    Inventors: Masato SUZUKI, Akito MORI, Gen HASHIGUCHI, Tatsuhiko SUGIYAMA, Hiroshi IMAMOTO, Masatoshi OBA, Hiroyuki MITSUYA, Hisayuki ASHIZAWA, Kazunori ISHIBASHI
  • Publication number: 20150211949
    Abstract: [Problem] The enclosing layer is not invaded in the gap, and the gap might not be buried, and the cavity which has the predetermined shape to be aimed can be formed by an easy step. [Resolution Approach] In the invention, comprising; the base member including the semiconductor 12, the interlayer 14, which is formed on the base member 12 and has the nonconductivity, the upper layer 16, which is formed on the interlayer 14 and includes the semiconductor, the opening portion 18 formed to the upper layer 16, the gas-permeable sealing layer 20, which is formed to seal the opening portion 18, wherein the cavity 22 is a cavity which is formed by removing the interlayer 14 with an etching gas that is penetrated through the sealing layer 20.
    Type: Application
    Filed: June 18, 2013
    Publication date: July 30, 2015
    Applicants: The University of Tokyo, Kabushiki Kaisha Saginomiya Seisakusho
    Inventors: Hiroyuki Fujita, Hiroshi Toshiyoshi, Hiroyuki Mitsuya
  • Patent number: 5466197
    Abstract: A mechanical - hydraulic transmission for a crawler-type vehicle is provided having a reduced dimension in a widthwise direction perpendicular to input/output shafts and capable of ready installation on an existent crawler steering device. The transmission is arranged such that a power input shaft (1), directly connected to a prime mover, an intermediate shaft (9) and an output shaft (19), are concentrically related and arranged in a longitudinal column. Normal- and reverse-rotation planetary gear devices (5, 6), having respective clutches (7, 8) thereof, are mounted on a periphery of the power input shaft (1), and the power input shaft (1) is connected to a variable displacement hydraulic pump (2).
    Type: Grant
    Filed: May 24, 1993
    Date of Patent: November 14, 1995
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventors: Hiroyuki Mitsuya, Hideki Yamada, Ryoichi Maruyama, Tsutomu Ishino