Patents by Inventor Akihiko Umeda

Akihiko Umeda 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: 20230018880
    Abstract: A magnetic pole piece device according to an embodiment is a magnetic pole piece device disposed between an inner diameter side magnet field and an outer diameter side magnet field of a magnetic gear that includes an annular member which includes a plurality of magnetic pole pieces disposed at intervals in a circumferential direction, and a plurality of holding members respectively disposed between the plurality of magnetic pole pieces, and a cover member which is made of a composite material obtained by impregnating continuous fiber extending along the circumferential direction with a matrix resin. The cover member is disposed on at least one of an outer circumferential surface and an inner circumferential surface of the annular member. A relation of ?·tc?t?½·tc is satisfied, where tc is a gap between the annular member and the magnet field and t is a thickness of the cover member.
    Type: Application
    Filed: December 11, 2020
    Publication date: January 19, 2023
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Takayuki SHIMIZU, Mikito SASAKI, Shinichi ISOBE, Akihiko UMEDA, Atsushi YUGE
  • Patent number: 11273478
    Abstract: A power transmission device includes a first power transmission path for transmitting a driving force of a motor to one driven shaft, and a second power transmission path for transmitting the driving force of the motor to another driven shaft. At least one of the first power transmission path or the second power transmission path includes a first intermediate rotor fixed to an output shaft of the motor, a second intermediate rotor rotated by the first intermediate rotor and moving arcuately along an outer circumference of the first intermediate rotor, a driving shaft rotated by the second intermediate rotor and transmitting the driving force to the one driven shaft or the another driven shaft. The driving shaft is configured to move in a direction perpendicular to an axial center direction of the driving shaft in accordance with movement of the second intermediate rotor around the first intermediate rotor.
    Type: Grant
    Filed: June 7, 2019
    Date of Patent: March 15, 2022
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Akihiko Umeda, Katsuhiko Shoda, Kensuke Nishiura, Kazuma Otaka
  • Patent number: 10944307
    Abstract: A rotary electric machine includes an armature unit including an annular rotor configured to be rotatable around an axis and a stator disposed on a radially outer side of the annular rotor; an input or output shaft coupled at a first end thereof to an external device and extending along an axial direction of the annular rotor in a central space defined in a central portion of the annular rotor; and a coupling device disposed closer to a second end of the input or output shaft than an end of the annular rotor adjacent to the external device in the axial direction of the annular rotor and connecting the input or output shaft and the annular rotor so as to be able to transmit a torque.
    Type: Grant
    Filed: November 7, 2019
    Date of Patent: March 9, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Akihiko Umeda, Mikito Sasaki, Shin Asano, Hiroshi Sato, Hisanobu Shinoda, Shinichi Isobe, Atsushi Yuge
  • Publication number: 20200266681
    Abstract: A rotary electric machine includes an armature unit including an annular rotor configured to be rotatable around an axis and a stator disposed on a radially outer side of the rotor; an input/output shaft coupled at a first end to an external device and extending along an axial direction of the rotor in a central space formed in a central portion of the rotor; and a coupling device disposed closer to a second end of the input/output shaft than an end of the rotor adjacent to the external device is in the axial direction and connecting the input/output shaft and the rotor so as to be able to transmit a torque.
    Type: Application
    Filed: November 7, 2019
    Publication date: August 20, 2020
    Inventors: Akihiko UMEDA, Mikito SASAKI, Shin ASANO, Hiroshi SATO, Hisanobu SHINODA, Shinichi ISOBE, Atsushi YUGE
  • Publication number: 20200238352
    Abstract: A power transmission device includes a first power transmission path for transmitting a driving force of a motor to one driven shaft, and a second power transmission path for transmitting the driving force of the motor to another driven shaft. At least one of the first power transmission path or the second power transmission path includes a first intermediate rotor fixed to an output shaft of the motor, a second intermediate rotor rotated by the first intermediate rotor and moving arcuately along an outer circumference of the first intermediate rotor, a driving shaft rotated by the second intermediate rotor and transmitting the driving force to the one driven shaft or the another driven shaft. The driving shaft is configured to move in a direction perpendicular to an axial center direction of the driving shaft in accordance with movement of the second intermediate rotor around the first intermediate rotor.
    Type: Application
    Filed: June 7, 2019
    Publication date: July 30, 2020
    Inventors: Akihiko UMEDA, Katsuhiko SHODA, Kensuke NISHIURA, Kazuma OTAKA
  • Patent number: 10578151
    Abstract: A rolling bearing includes an outer ring supported by a fixed body, an inner ring which supports a rotating shaft, and rolling elements between an inner groove of the outer ring and an outer groove of the inner ring, wherein a curvature radius R of at least the inner groove of the outer ring is in a range of 2r×0.53?R?2r×0.55 in relation to a radius r of one of the rolling elements.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: March 3, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Akihiko Umeda, Shuichi Isayama, Hiroyuki Tani, Shigeyuki Mori, Shinya Nakamura, Toshihiro Omae
  • Patent number: 10311984
    Abstract: The shaft sealing structure includes a seal ring that has abutment portions formed by dividing the seal ring along the axial direction and that is provided around a main shaft in a ring-like manner; a support member that is provided in the seal ring along the circumferential direction of the main shaft; and a thermoswitch that is connected to the support member between the abutment portions and that presses the support member toward the center of the main shaft when the temperature rises to a temperature higher than that during normal operation, in which the seal ring is fixed at a position separated from the main shaft during the normal operation and is moved by the support member toward the center of the main shaft when the temperature rises to a temperature higher than that during the normal operation.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: June 4, 2019
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Kentarou Saeki, Hidekazu Uehara, Akihiko Umeda, Masaru Sakai, Hiroshi Kuzumi, Yasuhiro Ikeda, Toshihiko Matsuo, Takanobu Otani, Hiroomi Sakuma, Hitoshi Ito, Yasushi Takayama, Tomoki Hanada, Yuji Harada
  • Publication number: 20190113070
    Abstract: A rolling bearing includes an outer ring supported by a fixed body, an inner ring which supports a rotating shaft, and rolling elements between an inner groove of the outer ring and an outer groove of the inner ring, wherein a curvature radius R of at least the inner groove of the outer ring is in a range of 2r×0.53?R?2r×0.55 in relation to a radius r of one of the rolling elements.
    Type: Application
    Filed: March 13, 2018
    Publication date: April 18, 2019
    Inventors: Akihiko UMEDA, Shuichi ISAYAMA, Hiroyuki TANI, Shigeyuki MORI, Shinya NAKAMURA, Toshihiro OMAE
  • Patent number: 10215150
    Abstract: A water flow power generator includes a nacelle, a vane wheel that is disposed so as to be rotatable relative to the nacelle, and that is rotated by a water flow while including a plurality of blades, a power generator that is disposed inside the nacelle, and that generates electric power by using rotating power transmitted from the vane wheel, and a vane wheel rotation stopping mechanism that is disposed in the nacelle, that includes a rod which can enter the inside of a rotational trajectory of the vane wheel, and that stops the rotation of the vane wheel.
    Type: Grant
    Filed: October 23, 2015
    Date of Patent: February 26, 2019
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Akihiko Umeda, Shin Asano
  • Publication number: 20180038339
    Abstract: A water flow power generator includes a nacelle, a vane wheel that is disposed so as to be rotatable relative to the nacelle, and that is rotated by a water flow while including a plurality of blades, a power generator that is disposed inside the nacelle, and that generates electric power by using rotating power transmitted from the vane wheel, and a vane wheel rotation stopping mechanism that is disposed in the nacelle, that includes a rod which can enter the inside of a rotational trajectory of the vane wheel, and that stops the rotation of the vane wheel.
    Type: Application
    Filed: October 23, 2015
    Publication date: February 8, 2018
    Inventors: Akihiko UMEDA, Shin ASANO
  • Publication number: 20180031046
    Abstract: A coupling joint includes: joint member which has gear teeth; a center tube which has gear teeth meshing with the gear teeth, and through which a rotational force is transmitted between the joint member via the gear teeth and the gear teeth; a seal member which blocks a lubricated space including a meshing portion of the gear teeth and the gear teeth from the outside between the joint member and the center tube; a lubricant which fills the lubricated space; and a pressure-equalizing member which is provided to face a part of the lubricated space, changes the volume of the lubricated space by deforming in accordance with the pressure of the outside, and thereby equalizes the pressure of the lubricant and the pressure of the outside.
    Type: Application
    Filed: October 23, 2015
    Publication date: February 1, 2018
    Inventors: Akihiko UMEDA, Shin ASANO, Yoshitomo NODA
  • Publication number: 20150221400
    Abstract: The shaft sealing structure includes a seal ring that has abutment portions formed by dividing the seal ring along the axial direction and that is provided around a main shaft in a ring-like manner; a support member that is provided in the seal ring along the circumferential direction of the main shaft; and a thermoswitch that is connected to the support member between the abutment portions and that presses the support member toward the center of the main shaft when the temperature rises to a temperature higher than that during normal operation, in which the seal ring is fixed at a position separated from the main shaft during the normal operation and is moved by the support member toward the center of the main shaft when the temperature rises to a temperature higher than that during the normal operation.
    Type: Application
    Filed: September 27, 2013
    Publication date: August 6, 2015
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Kentarou Saeki, Hidekazu Uehara, Akihiko Umeda, Masaru Sakai, Hiroshi Kuzumi, Yasuhiro Ikeda, Toshihiko Matsuo, Takanobu Otani, Hiroomi Sakuma, Hitoshi Ito, Yasushi Takayama, Tomoki Hanada, Yuji Harada
  • Patent number: 8092333
    Abstract: There is provided a compact and highly durable variable-speed traction drive transmission device. A traction drive transmission device which uses the traction of rolling bodies K arranged between an input shaft Si and an output shaft So to change the number of revolutions of the input shaft Si into a desired transmission ratio and output from the output shaft So, has a rotation axis of the rolling bodies K arranged at an incline so that it is not orthogonal to the axis of the input shaft Si and the output shaft So, and there is provided: a load regulation cam 50 which automatically changes a preload applied to the rolling bodies K corresponding to a torque of the input shaft Si; and a differential type transmission ratio variation mechanism using a worm gear 55, which is connected to a retainer 40 serving as a traction input-output member of the rolling bodies K, and performs number of revolutions control of the retainer 40 to change the transmission ratio.
    Type: Grant
    Filed: February 23, 2006
    Date of Patent: January 10, 2012
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Yasuyoshi Tozaki, Takeshi Yoshimi, Akihiko Umeda, Hiroyuki Sonobe, Isamu Shiotsu, Takayoshi Hirayama
  • Publication number: 20090075775
    Abstract: There is provided a compact and highly durable variable-speed traction drive transmission device. A traction drive transmission device which uses the traction of rolling bodies K arranged between an input shaft Si and an output shaft So to change the number of revolutions of the input shaft Si into a desired transmission ratio and output from the output shaft So, has a rotation axis of the rolling bodies K arranged at an incline so that it is not orthogonal to the axis of the input shaft Si and the output shaft So, and there is provided: a load regulation cam 50 which automatically changes a preload applied to the rolling bodies K corresponding to a torque of the input shaft Si; and a differential type transmission ratio variation mechanism using a worm gear 55, which is connected to a retainer 40 serving as a traction input-output member of the rolling bodies K, and performs number of revolutions control of the retainer 40 to change the transmission ratio.
    Type: Application
    Filed: February 23, 2006
    Publication date: March 19, 2009
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Yasuyoshi Tozaki, Takeshi Yoshimi, Akihiko Umeda, Hiroyuki Sonobe, Isamu Shiotsu, Takayoshi Hirayama