Patents by Inventor Ryuichi Umehara

Ryuichi Umehara 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: 11066938
    Abstract: A rotary machine includes damper pins and platforms each having a flat surface extending in an axial line direction. For each adjacent pair of the platforms, a damper abutting surface of a first of the adjacent pair of the platforms extends toward a damper abutting surface of a second of the adjacent pair of the platforms as approaching an outer side of a rotor blade stage in a radial direction while opposing each other in a peripheral direction. A damper accommodation space, which is defined by surfaces including the damper abutting surfaces, is defined between each adjacent pair of the platforms. Each of the damper pins defines a regular polygonal prism extending in the axial line direction and includes a damper pin main body in which an angle defined by two side surfaces corresponds to an angle defined by the damper abutting surfaces between the adjacent pair of the platforms.
    Type: Grant
    Filed: March 22, 2019
    Date of Patent: July 20, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Ryuichi Umehara, Haruko Shiraishi
  • Publication number: 20200400038
    Abstract: A rotary machine includes a rotary shaft configured to rotate around an axis and a blade row including a plurality of blades at intervals in a circumferential direction of the axis. Each of the blades includes a fiber laminate obtained by laminating a plurality of fiber sheets and a resin used for forming an outer shape of the blade by impregnating the fiber laminate. At least two of the blades in the blade row have fiber laminates having different structures.
    Type: Application
    Filed: December 14, 2018
    Publication date: December 24, 2020
    Inventors: Toshihiko AZUMA, Ryuichi UMEHARA
  • Patent number: 10801335
    Abstract: In a rotary machine, one of platforms adjacent to each other in a peripheral direction has a first abutting surface extending in a radial direction and against which damper pins abut, and the rotary machine includes: a first moving member installed to be movable in the peripheral direction between the platforms adjacent to each other in the peripheral direction and on which a second damper abutting surface against which the damper pins abut is formed while a relative distance with the first damper abutting surface decreases as opposing the first damper abutting surface in the peripheral direction and approaching the outer side in the radial direction; and a spring member biasing the first moving member toward one side in the peripheral direction which is one platform side.
    Type: Grant
    Filed: March 21, 2019
    Date of Patent: October 13, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Ryuichi Umehara, Haruko Shiraishi
  • Publication number: 20190301288
    Abstract: In a rotary machine, one of platforms adjacent to each other in a peripheral direction has a first abutting surface extending in a radial direction and against which damper pins abut, and the rotary machine includes: a first moving member installed to be movable in the peripheral direction between the platforms adjacent to each other in the peripheral direction and on which a second damper abutting surface against which the damper pins abut is formed while a relative distance with the first damper abutting surface decreases as opposing the first damper abutting surface in the peripheral direction and approaching the outer side in the radial direction; and a spring member biasing the first moving member toward one side in the peripheral direction which is one platform side.
    Type: Application
    Filed: March 21, 2019
    Publication date: October 3, 2019
    Inventors: Ryuichi UMEHARA, Haruko SHIRAISHI
  • Publication number: 20190301289
    Abstract: In a rotary machine, platforms are each in a shape of a flat surface extending in an axial line direction and each includes damper abutting surfaces extending to be close to each other as approaching the outer side in the radial direction while opposing each other in the peripheral direction in each of the platforms adjacent to each other, and the damper pin forms a regular polygonal prism extending in the axial line direction and includes a damper pin main body in which an angle formed by two side surfaces among a plurality of side surfaces corresponds to an angle formed by the damper abutting surfaces adjacent to each other.
    Type: Application
    Filed: March 22, 2019
    Publication date: October 3, 2019
    Inventors: Ryuichi UMEHARA, Haruko SHIRAISHI
  • Patent number: 10317832
    Abstract: A moving member is disposed between an upper guide, which guides a conveyed transfer material and to which a voltage is applied from a power source, and a lower guide, which guides the conveyed transfer material, the upper guide being disposed on an upstream side with respect to a photosensitive drum in a conveyance direction of the transfer material. The moving member is supported by the upper guide, and is capable of abutting against and separating from the lower guide. By being pushed by the transfer material, the moving member transitions from a first state in which the moving member is abutted against the lower guide to a second state in which the moving member is separated from the lower guide.
    Type: Grant
    Filed: February 14, 2018
    Date of Patent: June 11, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Jun Asami, Toshiya Kaino, Ryuichi Umehara
  • Patent number: 10261462
    Abstract: An image forming apparatus includes a control unit that causes a supply operation to form a predetermined toner image and supplies toner of the predetermined toner image to a contact portion between a cleaning member and a photosensitive member at a non-image forming time. During at least a period in which toner of the predetermined toner image on the photosensitive member passes through a transfer unit during the supply operation, the control unit causes application of a pass-through voltage having the same polarity as a normal charge polarity of the toner and an absolute value that is less than an electric potential of a portion that is exposed by an exposure device of the photosensitive member, or having a reverse polarity that is reverse to the normal charge polarity of the toner to be applied from the transfer power supply to the transfer member.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: April 16, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Jun Asami, Toshiya Kaino, Ryuichi Umehara
  • Patent number: 10061254
    Abstract: An image forming system includes an image forming apparatus and a discharging device. The image forming apparatus includes a first rotatable member, a second rotatable member positioned downstream of the first rotatable member, a first driving portion for driving the first and second rotatable members, and a first controller for controlling the first driving portion. The discharging device includes a third rotatable member, a second driving portion for driving the third rotatable member, and a second controller for controlling the second driving portion. The first controller controls a driving speed of the second rotatable member depending on a driving speed of the first rotatable member and feeds the driving speed of the first rotatable member to the second controller. The second controller controls a driving speed of the third rotatable member depending on the driving speed fed from the first controller.
    Type: Grant
    Filed: October 12, 2016
    Date of Patent: August 28, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ryuichi Umehara, Toshiya Kaino, Atsushi Kawarago, Jun Asami
  • Publication number: 20180239288
    Abstract: A moving member is disposed between an upper guide, which guides a conveyed transfer material and to which a voltage is applied from a power source, and a lower guide, which guides the conveyed transfer material, the upper guide being disposed on an upstream side with respect to a photosensitive drum in a conveyance direction of the transfer material. The moving member is supported by the upper guide, and is capable of abutting against and separating from the lower guide. By being pushed by the transfer material, the moving member transitions from a first state in which the moving member is abutted against the lower guide to a second state in which the moving member is separated from the lower guide.
    Type: Application
    Filed: February 14, 2018
    Publication date: August 23, 2018
    Inventors: Jun Asami, Toshiya Kaino, Ryuichi Umehara
  • Publication number: 20180095385
    Abstract: The image forming apparatus includes the control unit that causes a supply operation that forms a predetermined toner image and supplies toner of the predetermined toner image to a contact portion between the cleaning member and the photosensitive member at a non-image forming time. During at least a period in which toner of the predetermined toner image on the photosensitive member passes through the transfer unit during the supply operation, the control unit causes application of a pass-through voltage that is a voltage having the same polarity as the normal charge polarity of the toner and whose absolute value is less than an electric potential of a portion that is exposed by the exposure device of the photosensitive member, or that is a voltage with a reverse polarity to the normal charge polarity of the toner to be applied from the transfer power supply to the transfer member.
    Type: Application
    Filed: September 13, 2017
    Publication date: April 5, 2018
    Inventors: Jun Asami, Toshiya Kaino, Ryuichi Umehara
  • Patent number: 9869953
    Abstract: The image forming apparatus, a conveyance speed of a recording material at a fixing nip portion, controlled by a control portion of the image forming apparatus so that a part of the recording material being conveyed touches a guide member between a transfer nip portion and a loop detection device for a period after an operation for maintaining a loop amount of the recording material being conveyed within a predetermined range is finished until the recording material trailing edge exits out the transfer nip portion.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: January 16, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Toshiya Kaino, Jun Asami, Ryuichi Umehara
  • Publication number: 20170227897
    Abstract: The image forming apparatus, a conveyance speed of a recording material at a fixing nip portion, controlled by a control portion of the image forming apparatus so that a part of the recording material being conveyed touches a guide member between a transfer nip portion and a loop detection device for a period after an operation for maintaining a loop amount of the recording material being conveyed within a predetermined range is finished until the recording material trailing edge exits out the transfer nip portion.
    Type: Application
    Filed: January 25, 2017
    Publication date: August 10, 2017
    Inventors: Toshiya Kaino, Jun Asami, Ryuichi Umehara
  • Publication number: 20170102654
    Abstract: An image forming system includes an image forming apparatus and a discharging device. The image forming apparatus includes a first rotatable member, a second rotatable member positioned downstream of the first rotatable member, a first driving portion for driving the first and second rotatable members, and a first controller for controlling the first driving portion. The discharging device includes a third rotatable member, a second driving portion for driving the third rotatable member, and a second controller for controlling the second driving portion. The first controller controls a driving speed of the second rotatable member depending on a driving speed of the first rotatable member and feeds the driving speed of the first rotatable member to the second controller. The second controller controls a driving speed of the third rotatable member depending on the driving speed fed from the first controller.
    Type: Application
    Filed: October 12, 2016
    Publication date: April 13, 2017
    Inventors: Ryuichi Umehara, Toshiya Kaino, Atsushi Kawarago, Jun Asami
  • Patent number: 9150396
    Abstract: The electric-vehicle control device is used in an electric vehicle which is provided with a vehicle body having a driving tire and an axle shaft and with a driving motor which imparts torque to the driving tire. The electric-vehicle control device issues a motor control command to the driving motor. The electric-vehicle control device is provided with a control unit, and the control unit gives feedback control to the driving motor by vibration parameters indicating vertical vibration of the electric vehicle at the center of the axle shaft.
    Type: Grant
    Filed: April 12, 2010
    Date of Patent: October 6, 2015
    Assignee: MITSUBISHI NICHIYU FORKLIFT CO., LTD.
    Inventors: Ryuichi Umehara, Osamu Nakakita, Masataka Kawaguchi, Toshiyuki Honda, Wataru Mizunuma
  • Publication number: 20140014295
    Abstract: A steam generator includes: an annular member (21) that surrounds a U-bent portion (18) obtained by collectively disposing bent portions of a plurality of heat transfer tubes and is provided between an outer peripheral portion of the U-bent portion (18) and a tube bundle shroud (3) surrounding the outer peripheral portion so as to have a predetermined gap with respect to the U-bent portion (18); a second support member (22) that is provided between the annular member (21) and the tube bundle shroud (3); and a third support member (23) that is attached to a cylinder portion (2) accommodating a plurality of heat transfer tubes and supports the second support member (22).
    Type: Application
    Filed: June 21, 2012
    Publication date: January 16, 2014
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Ryuichi Umehara, Masatsugu Monde, Ryoichi Kawakami, Tomoya Nakagawa, Kazuo Hirota, Yoichi Iwamoto, Itaru Muroya
  • Publication number: 20120303225
    Abstract: An industrial vehicle 1 includes a brake 5 that applies a driving force or a braking force to a vehicle body 22, a lift pressure sensor 632 that detects pitching vibration of a vehicle body, and a pitching control unit 62 that calculates a pitching control torque for suppressing pitching vibration and generates a pitching control signal for causing the brake 5 to output the pitching control torque. When the industrial vehicle 1 runs under a load, the pitching control unit 62 calculates the pitching control torque based on an output value from the lift pressure sensor 632 to output the pitching control signal. The brake 5 is then driven based on the pitching control signal.
    Type: Application
    Filed: June 22, 2010
    Publication date: November 29, 2012
    Inventors: Kensuke Futahashi, Yusuke Kinouchi, Ryuichi Umehara, Takuya Nakada, Takashi Shibutani, Masaru Higuchi
  • Publication number: 20120226374
    Abstract: Natural vibrations of a workpiece to be obtained before and after machining of the workpiece are first input (Step S1). A region of the natural vibrations of the workpiece between before and after the machining is set on a Campbell diagram (Step S2). Vibration components of a machining tool to be generated during the machining are input (Step S3). The vibration components of the machining tool to be generated during the machining are set on the Campbell diagram (Step S4). Referring to the Campbell diagram, the number of revolutions of the machining tool out of a range where the vibration components of the machining tool resonate with the natural vibrations of the workpiece within the region of the natural vibrations between before and after the machining is determined (Step S5). Machining of the workpiece is then performed based on the number of revolutions of the machining tool (Step S6).
    Type: Application
    Filed: November 13, 2009
    Publication date: September 6, 2012
    Inventors: Chiaki Yasuda, Ryuichi Umehara, Atsushi Inoue, Nobuo Shimizu, Hirokazu Matsushita
  • Publication number: 20120185121
    Abstract: The electric-vehicle control device is used in an electric vehicle which is provided with a vehicle body having a driving tire and an axle shaft and with a driving motor which imparts torque to the driving tire. The electric-vehicle control device issues a motor control command to the driving motor. The electric-vehicle control device is provided with a control unit, and the control unit gives feedback control to the driving motor by vibration parameters indicating vertical vibration of the electric vehicle at the center of the axle shaft.
    Type: Application
    Filed: April 12, 2010
    Publication date: July 19, 2012
    Inventors: Ryuichi Umehara, Osamu Nakakita, Masataka Kawaguchi, Toshiyuki Honda, Wataru Mizunuma