Patents by Inventor Yuichi Asakawa

Yuichi Asakawa 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: 11905930
    Abstract: For each of actuators, the partial load ratio is output. An output device for a drive device of a wind turbine includes an obtaining unit for obtaining information relating to a load applied to each of a plurality of actuators, where the actuators are included in the drive device of the wind turbine and configured to cooperate with each other, a processing unit for, based on the information obtained by the obtaining unit, calculating a partial load ratio, where the partial load ratio represents a ratio of a load on each of the actuators to a total load and the total load is a sum of the loads on the respective actuators, and an output unit for outputting the partial load ratio.
    Type: Grant
    Filed: September 3, 2021
    Date of Patent: February 20, 2024
    Assignee: Nabtesco Corporation
    Inventor: Yuichi Asakawa
  • Patent number: 11808337
    Abstract: One aspect of the present invention provides a method for manufacturing a strain wave gear device. The method includes steps of measuring a between pin diameter of an internal gear, measuring an over pin diameter of an external gear, where the external gear is to be placed radially inside the internal gear, configured to mesh with the internal gear, and flexible, measuring a dimension of a bearing, where the bearing is to be placed radially inside the external gear, and flexible, and machining an elliptical cam, where the elliptical cam is to be placed radially inside the bearing, and configured to flex the external gear in a non-circular manner. The elliptical cam is machined based on the measured dimensions of the internal gear, external gear and bearing such that the internal and external gears mesh with each other at a constant position.
    Type: Grant
    Filed: March 1, 2022
    Date of Patent: November 7, 2023
    Assignee: NABTESCO CORPORATION
    Inventors: Masashi Imai, Yuichi Asakawa
  • Publication number: 20220324180
    Abstract: A method for processing a resin member includes: irradiating a first member comprising a resin with first light of a first wavelength that causes electronic excitation of the resin; and irradiating the resin electronically excited through irradiation with the first light with second light of a second wavelength longer than the first wavelength. A wavelength range of the second wavelength is within a wavelength range in which light absorption of the resin increases through electronic excitation of the resin.
    Type: Application
    Filed: June 23, 2022
    Publication date: October 13, 2022
    Applicants: Laser Systems Inc., NICHIA CORPORATION
    Inventors: Yuichi ASAKAWA, Yasuyuki TSUBOI, Hiroaki TAMEMOTO, Ryota TAOKA, Minoru YAMAMOTO
  • Publication number: 20220282777
    Abstract: One aspect of the present invention provides a method for manufacturing a strain wave gear device. The method includes steps of measuring a between pin diameter of an internal gear, measuring an over pin diameter of an external gear, where the external gear is to be placed radially inside the internal gear, configured to mesh with the internal gear, and flexible, measuring a dimension of a bearing, where the bearing is to be placed radially inside the external gear, and flexible, and machining an elliptical cam, where the elliptical cam is to be placed radially inside the bearing, and configured to flex the external gear in a non-circular manner. The elliptical cam is machined based on the measured dimensions of the internal gear, external gear and bearing such that the internal and external gears mesh with each other at a constant position.
    Type: Application
    Filed: March 1, 2022
    Publication date: September 8, 2022
    Inventors: Masashi IMAI, Yuichi ASAKAWA
  • Patent number: 11274655
    Abstract: One object is to promptly and accurately sense an abnormal state of a wind turbine driving device. The wind turbine driving device includes a driving device body and a sensor. The driving device body is installed in one structure at a movable section of a wind turbine. The driving device body includes a meshing portion meshing with a ring gear installed in the other structure at the movable section of the wind turbine. The sensor measures a change in installation state of the driving device body with respect to the one structure.
    Type: Grant
    Filed: December 5, 2017
    Date of Patent: March 15, 2022
    Assignee: NABTESCO CORPORATION
    Inventors: Osamu Nohara, Shigeru Hosoda, Yuichi Asakawa
  • Publication number: 20220074387
    Abstract: For each of actuators, the partial load ratio is output. An output device for a drive device of a wind turbine includes an obtaining unit for obtaining information relating to a load applied to each of a plurality of actuators, where the actuators are included in the drive device of the wind turbine and configured to cooperate with each other, a processing unit for, based on the information obtained by the obtaining unit, calculating a partial load ratio, where the partial load ratio represents a ratio of a load on each of the actuators to a total load and the total load is a sum of the loads on the respective actuators, and an output unit for outputting the partial load ratio.
    Type: Application
    Filed: September 3, 2021
    Publication date: March 10, 2022
    Inventor: Yuichi ASAKAWA
  • Publication number: 20190390651
    Abstract: One object is to promptly and accurately sense an abnormal state of a wind turbine driving device. The wind turbine driving device includes a driving device body and a sensor. The driving device body is installed in one structure at a movable section of a wind turbine. The driving device body includes a meshing portion meshing with a ring gear installed in the other structure at the movable section of the wind turbine. The sensor measures a change in installation state of the driving device body with respect to the one structure.
    Type: Application
    Filed: December 5, 2017
    Publication date: December 26, 2019
    Inventors: Osamu NOHARA, Shigeru HOSODA, Yuichi ASAKAWA
  • Publication number: 20170298903
    Abstract: A wind power generator is provided with a drive unit, a clutch hydraulic source, and a clutch control portion. The drive unit has a hydraulic clutch mechanism configured to perform switching between transmission and non-transmission of rotary power from an output shaft to a pinion. The clutch hydraulic source supplies a hydraulic pressure to the clutch mechanism. The clutch control portion controls a hydraulic pressure supplied from the clutch hydraulic source to the clutch mechanism.
    Type: Application
    Filed: April 13, 2017
    Publication date: October 19, 2017
    Inventors: Juhyun YU, Ryouji AZUMAISHI, Katsuhiko YOKOYAMA, Yuichi ASAKAWA
  • Patent number: 9790920
    Abstract: A rotation driving mechanism for windmill (1) includes an annular track part (2), a rotation driving part (11), and a plurality of swinging parts (15). The annular track part (2) is disposed on one of a base-side structure and a rotation-side structure, and has a track wall part (3) and first teeth (7). The rotation driving part (11) is fixed on the other of the base-side structure and the rotation-side structure. Each swinging part (15) has a swinging part body (16a) and second teeth (16b). When a rotating shaft (13) of the rotation driving part (11) is rotated so that the swinging parts (15) are swung with maintaining a predetermined phase difference thereamong, the swinging parts (15) are relatively moved with respect to the annular track part (2).
    Type: Grant
    Filed: June 16, 2015
    Date of Patent: October 17, 2017
    Assignee: NABTESCO CORPORATION
    Inventors: Osamu Nohara, Yuichi Asakawa
  • Publication number: 20150377212
    Abstract: A rotation driving mechanism for windmill (1) includes an annular track part (2), a rotation driving part (11), and a plurality of swinging parts (15). The annular track part (2) is disposed on one of a base-side structure and a rotation-side structure, and has a track wall part (3) and first teeth (7). The rotation driving part (11) is fixed on the other of the base-side structure and the rotation-side structure. Each swinging part (15) has a swinging part body (16a) and second teeth (16b). When a rotating shaft (13) of the rotation driving part (11) is rotated so that the swinging parts (15) are swung with maintaining a predetermined phase difference thereamong, the swinging parts (15) are relatively moved with respect to the annular track part (2).
    Type: Application
    Filed: June 16, 2015
    Publication date: December 31, 2015
    Inventors: Osamu NOHARA, Yuichi ASAKAWA
  • Publication number: 20040076432
    Abstract: The present invention offers a coherent light generating device with extremely little Fresnel loss. Additionally, the invention makes anti-reflection coatings on the end surfaces of a wavelength-converting medium unnecessary, while also reducing deterioration of anti-reflection coatings and wavelength-converting medium end surfaces, thereby improving the durability of the device.
    Type: Application
    Filed: July 14, 2003
    Publication date: April 22, 2004
    Applicant: Cyber Laser, Inc.
    Inventors: Jun Sakuma, Yuichi Asakawa