Patents by Inventor Katsuya Umemura

Katsuya Umemura 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: 10036447
    Abstract: A stabilizer (10) includes a base (20) fixed on a motion reduction target (1); a gimbal (40) supported by the base to be rotatable around a first axis (RA); a damper mechanism (30) disposed to damp a relative rotary motion of the gimbal (40) to the base (20); a flywheel (50) disposed to be rotatable around a second axis (RB) orthogonal to the first axis (RA). The damper mechanism (30) is a passive-type damper mechanism. A first value (D1) of a damping coefficient (D) of the damper mechanism (30) when an angular velocity of the gimbal (40) is a first angular velocity is larger than a second value (D2) of the damping coefficient (D) of the damper mechanism (30) when the angular velocity of the gimbal (40) is a second angular velocity smaller than the first angular velocity.
    Type: Grant
    Filed: October 20, 2015
    Date of Patent: July 31, 2018
    Assignee: TOHMEI INDUSTRIES CO., LTD.
    Inventors: Tsuyoshi Nohara, Takashi Miura, Hiroshi Takeuchi, Katsuya Umemura
  • Publication number: 20170370443
    Abstract: A stabilizer (10) includes a base (20) fixed on a motion reduction target (1); a gimbal (40) supported by the base to be rotatable around a first axis (RA); a damper mechanism (30) disposed to damp a relative rotary motion of the gimbal (40) to the base (20); a flywheel (50) disposed to be rotatable around a second axis (RB) orthogonal to the first axis (RA). The damper mechanism (30) is a passive-type damper mechanism. A first value (D1) of a damping coefficient (D) of the damper mechanism (30) when an angular velocity of the gimbal (40) is a first angular velocity is larger than a second value (D2) of the damping coefficient (D) of the damper mechanism (30) when the angular velocity of the gimbal (40) is a second angular velocity smaller than the first angular velocity.
    Type: Application
    Filed: October 20, 2015
    Publication date: December 28, 2017
    Inventors: Tsuyoshi NOHARA, Takashi MIURA, Hiroshi TAKEUCHI, Katsuya UMEMURA
  • Patent number: 9452810
    Abstract: A rolling motion reducing apparatus includes a flywheel, a gimbal, a gimbal supporting section, a damper and a lock mechanism. The gimbal rotatably supports the flywheel. The gimbal supporting section supports the gimbal 11 through a gimbal shaft such that the gimbal can rotate. The damper 13 brakes a rotational motion of the gimbal. The lock mechanism locks a rotational motion of the gimbal.
    Type: Grant
    Filed: March 4, 2013
    Date of Patent: September 27, 2016
    Assignee: TOHMEI INDUSTRIES CO., LTD.
    Inventors: Tsuyoshi Nohara, Hiroshi Takeuchi, Katsuya Umemura
  • Publication number: 20140245939
    Abstract: A swinging motion reducing apparatus includes a flywheel 20, a gimbal 11, a gimbal supporting section 12, a damper 13 and a lock mechanism 14. The gimbal 11 rotatably supports the flywheel 20. The gimbal supporting section 12 supports the gimbal 11 through a gimbal shaft 15 such that the gimbal 11 can swing. The damper 13 brakes a swinging motion of the gimbal 11. The lock mechanism 14 locks a swinging motion of the gimbal 11.
    Type: Application
    Filed: March 4, 2013
    Publication date: September 4, 2014
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Tsuyoshi Nohara, Hiroshi Takeuchi, Katsuya Umemura
  • Publication number: 20110030604
    Abstract: In a swing motion reducing apparatus for a ship includes a flywheel, a gimbal mechanism configured to rotatably support the flywheel, a motor configured to rotate the flywheel based on a drive power to be supplied; and a motor driver configured to supply the drive power to the motor. A damper section is configured to brake a swing motion of the gimbal mechanism. A safety unit controls the motor driver to stop the supply of the drive power to the motor when a temperature of the damper section is equal to or higher than a predetermined temperature.
    Type: Application
    Filed: January 29, 2010
    Publication date: February 10, 2011
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Hiroshi Takeuchi, Katsuya Umemura, Sadahiro Maeda
  • Patent number: 6619221
    Abstract: An oscillation suppression device comprises a base body to be secured to a ship body, a gimbals secured to the base body, a damper, a flywheel provided in the gimbals, and a motor for rotating the flywheel, etc. The gimbals is supported by bearings built into a pair of side walls of the base body, respectively, such that it can rotate around a first axis. The flywheel can rotate around a second axis. A rotor member of the motor is attached to the flywheel, and a stator member is attached to the gimbals. The rotor member and stator member are located inside the locus-of-rotation of the gimbals. The base body includes a cover portion covering the outer surface of the gimbals.
    Type: Grant
    Filed: April 3, 2002
    Date of Patent: September 16, 2003
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Katsuya Umemura, Youhei Ando
  • Publication number: 20030029367
    Abstract: An oscillation suppression device comprises a base body to be secured to a ship body, a gimbals secured to the base body, a damper, a flywheel provided in the gimbals, and a motor for rotating the flywheel, etc. The gimbals is supported by bearings built into a pair of side walls of the base body, respectively, such that it can rotate around a first axis. The flywheel can rotate around a second axis. A rotor member of the motor is attached to the flywheel, and a stator member is attached to the gimbals. The rotor member and stator member are located inside the locus-of-rotation of the gimbals. The base body includes a cover portion covering the outer surface of the gimbals.
    Type: Application
    Filed: April 3, 2002
    Publication date: February 13, 2003
    Inventors: Katsuya Umemura, Youhei Ando
  • Patent number: 5628267
    Abstract: An oscillation suppression device is provided for attenuating oscillation of an object to be controlled by a gyro torque of a control moment gyro having a flywheel rotating at a high speed. The oscillation suppression device includes an angular velocity detector for detecting an oscillation angular velocity of the object to be controlled. A control unit is connected to a gimbal shaft of the control moment gyro for controlling the angular velocity .theta. of the gimbal of the control moment gyro so as to absorb an external torque generated in the object to be controlled. The control unit operates in response to the oscillation angular velocity .PHI., which is detected by the angular velocity detector.
    Type: Grant
    Filed: October 26, 1994
    Date of Patent: May 13, 1997
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Akinori Hoshio, Katsuya Umemura, Hiroshi Takeuchi