Patents by Inventor Takashi Yamaguchi

Takashi Yamaguchi 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: 20200304050
    Abstract: A low-frequency torque controller 9 outputs a low-frequency torque controller output ?dc* based on a torque command value ?* and a torque detection value ?det, and a vibrational torque controller 11 outputs a vibrational torque command value ?pd* based on the torque command value ?*, the torque detection value ?det, and a rotational phase detection value ?. Meanwhile, in a high-frequency resonance suppression controller, an inverter torque command value ?inv* is outputted based on the torque detection value ?det and a corrected torque command value ?r* obtained by adding the low-frequency torque controller output ?dc* to the vibrational torque command value ?pd*. The invention thus provides shaft torque vibrational control of a motor drive system wherein engine vibrational torque command values including distortion components are tracked while entirely removing the influence of resonance, non-periodic disturbances, and periodic disturbances.
    Type: Application
    Filed: April 7, 2020
    Publication date: September 24, 2020
    Applicant: Meidensha Corporation
    Inventors: Yugo Tadano, Takao Akiyama, Takashi Yamaguchi
  • Publication number: 20200294281
    Abstract: Provided is an X-ray CT apparatus including an X-ray irradiation unit that rotates around a placement portion on which an irradiation target is placed and emits X-rays; an X-ray detection unit that detects the X-rays emitted from the X-ray irradiation unit and passed through the irradiation target; and an image reconstruction unit that reconstructs a tomographic image of the irradiation target based on image data of the X-rays detected by the X-ray detection unit, in which the image reconstruction unit calculates a scattered ray component scattered in each of a plurality of three-dimensional spaces obtained by partitioning the irradiation target by a predetermined size among the X-rays detected by the X-ray detection unit in consideration of an atom number density per unit volume in each of sections included in the plurality of three-dimensional spaces and an atomic number, and reconstructs the tomographic image in consideration of the scattered ray component.
    Type: Application
    Filed: March 13, 2020
    Publication date: September 17, 2020
    Inventor: Takashi Yamaguchi
  • Publication number: 20200277989
    Abstract: Provided is a method of manufacturing a sintered bearing including, on an inner peripheral surface, a cylindrical portion and a one-side increased-diameter portion (increased-diameter portion), which are provided so as to be continuous in the axial direction. When sizing is performed on a sintered compact, the cylindrical portion and the one-side increased-diameter portion are molded on an inner peripheral surface of the sintered compact by press-fitting a cylindrical portion molding surface formed on a core into an inner peripheral surface of the sintered compact from the one side in the axial direction, and then by pressing a one-side increased-diameter portion molding surface provided so as to be continuous with the cylindrical portion molding surface in the axial direction against an inner peripheral surface of the sintered compact under a state in which an outer peripheral surface of the sintered compact is retained by a die.
    Type: Application
    Filed: May 19, 2020
    Publication date: September 3, 2020
    Inventors: Tomonori YAMASHITA, Yoshinori ITO, Takashi YAMAGUCHI
  • Patent number: 10737402
    Abstract: An electric hair cutter includes a motion conversion mechanism that converts rotary motion of an output shaft of an electric motor into reciprocating linear motion and a movable blade driven by reciprocating linear motion of the motion conversion mechanism. The motion conversion mechanism includes a first conversion portion, converting rotary motion of the output shaft into reciprocating rotary motion about a first axis, a second conversion portion, converting the reciprocating rotary motion into reciprocating linear motion, and an output portion, coupling the second conversion portion to the movable blade. The second conversion portion includes a motion transmission part, coupling the first conversion portion to the output portion, and an elastic deformation part coupled to the motion transmission part to restrict motion of the motion transmission part caused by motion components differing from a motion component in an output direction so that the motion transmission part linearly reciprocates.
    Type: Grant
    Filed: January 22, 2018
    Date of Patent: August 11, 2020
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Wei Wang, Takashi Yamaguchi, Qinghui Yan
  • Patent number: 10697496
    Abstract: A sintered bearing includes a cylindrical portion, one-side increased-diameter portion and another-side increased-diameter portion. A metal structure of the another-side increased-diameter portion has a higher density than a metal structure of a core portion of the sintered compact. A metal structure of the cylindrical portion has an expansion along a direction of ironing by the sizing core and a higher density than the metal structure of the another-side increased-diameter portion. A metal structure of the one-side increased-diameter portion has an expansion along a direction of ironing by the sizing core and a higher density than the metal structure of the cylindrical portion.
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: June 30, 2020
    Assignee: NTN CORPORATION
    Inventors: Tomonori Yamashita, Yoshinori Ito, Takashi Yamaguchi
  • Publication number: 20200201455
    Abstract: An electronic pen includes a tubular casing, and a first coupling member and a second coupling member that are coupled to each other in a hollow portion of the casing in an axial direction of the casing. In the axial direction, the first coupling member and the second coupling member are coupled to each other while partially overlapping each other, and in a coupling portion between the first coupling member and the second coupling member, a welded portion that attaches the first coupling member and the second coupling member to each other is formed.
    Type: Application
    Filed: March 4, 2020
    Publication date: June 25, 2020
    Inventors: Kohei TANAKA, Hiroyuki FUJITSUKA, Kenichi NINOMIYA, Takenori KANEDA, Gunji ISHIHARA, Takashi YAMAGUCHI, Taketoshi ITO, Shuanglei LI
  • Publication number: 20200194155
    Abstract: A superconducting wire has a tape-like shape, and includes a superconducting layer. An amount of heat required to raise temperature from 77 K to 300 K, for a unit region having a length of 1 m and a width of 4 mm in the superconducting wire, is more than or equal to 200 J and less than or equal to 500 J.
    Type: Application
    Filed: May 22, 2017
    Publication date: June 18, 2020
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Genki HONDA, Tatsuoki NAGAISHI, Masaya KONISHI, Kotaro OHKI, Takashi YAMAGUCHI, Yoshihiro HONDA, Tatsuhiko YOSHIHARA
  • Patent number: 10684672
    Abstract: A memory system includes a nonvolatile semiconductor memory, and a controller circuit that includes a physical layer and is configured to store information defining a plurality of low power consumption modes for setting the physical layer to a low power consumption state while controlling the physical layer according to a first standard, and control input and output of signals between the physical layer and the nonvolatile semiconductor memory according to a second standard. The controller circuit selects one of the low power consumption modes based on a data transfer state of the physical layer.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: June 16, 2020
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventors: Junji Koyama, Kenji Ichihara, Keizo Ikeda, Junichi Mishima, Yosuke Yamahara, Takashi Yamaguchi, Takuya Sekine, Akinori Bito, Yoshiki Yasui, Ken Okuyama, Yoshinori Shigeta
  • Patent number: 10669903
    Abstract: An oil cooling structure of an engine is provided that is capable of enhancing cooling performance of oil while preventing an increase in number of components or an increase in required space from being involved as much as possible. In an oil cooling structure of an engine in which a transmission case is attached to one end wall of an engine body, and a transmission mechanism for an accessory drive is provided in the transmission case, the transmission case is formed into a potlid-shaped body having a plurality of rib walls along a front-rear direction, and is attached to an engine front wall with an engine cooling fan, and case inner chamber portions partitioned by the rib walls in the transmission case are configured as a transporting passage of oil circulated by an oil pump.
    Type: Grant
    Filed: June 9, 2017
    Date of Patent: June 2, 2020
    Assignee: KUBOTA Corporation
    Inventors: Hiroki Oso, Hideyuki Koyama, Hideyuki Goto, Takahiro Yamazaki, Kentaro Nagai, Takashi Yamaguchi, Rina Kaneko
  • Patent number: 10665367
    Abstract: An oxide superconducting wire includes an oriented metal substrate, an intermediate layer formed on the oriented metal substrate, and an oxide superconducting layer formed on the intermediate layer. The oriented metal substrate has an in-plane orientation ?? of 7° or less. The intermediate layer is formed of a single layer.
    Type: Grant
    Filed: July 12, 2016
    Date of Patent: May 26, 2020
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Genki Honda, Tatsuoki Nagaishi, Masaya Konishi, Kotaro Ohki, Takashi Yamaguchi, Tatsuhiko Yoshihara
  • Publication number: 20200154028
    Abstract: To provide an observation system and a light source control apparatus capable of more efficiently generating observation light to be used for special observation different from normal observation, and enabling the special observation to be more efficiently performed. An observation system includes: a plurality of light sources that emits light of different wavelength bands that can be combined to generate white light; an optical system that irradiates an observation object with first light that includes light emitted from some of the plurality of light sources; an imaging device that captures an image of the observation object irradiated with the first light; and a light source control unit that controls the quantity of the first light on the basis of the luminance of a pixel corresponding to a predetermined wavelength band in the captured image.
    Type: Application
    Filed: February 16, 2018
    Publication date: May 14, 2020
    Applicant: Sony Corporation
    Inventors: Hirotaka MURAMATSU, Takashi YAMAGUCHI
  • Patent number: 10641200
    Abstract: A cooling structure of a water-cooled engine includes: a plurality of cylinders 2 arranged in a cylinder block 1; and a water jacket W formed around the plurality of cylinders 2. The water jacket W includes a pair of main flow paths 7, 8 formed in a state of extending in a cylinder arrangement direction outside the cylinders, and inter-bore flow paths 9, 10 formed between adjacent cylinders 2 in a state of connecting the pair of main flow paths 7, 8. Guide walls 11h, 13h, capable of guiding the cooling water flowing in the main flow paths 7, 8 to the inter-bore flow paths 9, 10, are formed in the cylinder block 1.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: May 5, 2020
    Assignee: KUBOTA Corporation
    Inventors: Hiroki Oso, Takahiro Yamazaki, Hideyuki Koyama, Rina Kaneko, Yoshinori Tanaka, Takashi Yamaguchi, Akira Tanaka
  • Publication number: 20200124503
    Abstract: Various embodiments described herein, relates to a filter-less particle separation unit (FLPS) for a gas monitoring system. The filter-less particle separation unit includes, an inlet that defines an annular flow passage to facilitate an inflow of a fluid in the FLPS. In this regard, the annular flow passage between a first end and a second end of the inlet, defines an acceleration nozzle that is operable to accelerate the inflow, and eject the fluid at a defined volumetric flow rate. The FLPS further includes, a particle separating zone having a cavity of a defined form factor. The particle separation zone is operable to separate any particulate material that may be present in the fluid. Further, the FLPS includes an outlet operable to facilitate an outflow of filtered fluid to an input port of the gas monitoring system that measures a concentration of a reactive gas present in the fluid.
    Type: Application
    Filed: October 19, 2018
    Publication date: April 23, 2020
    Inventors: Takashi YAMAGUCHI, Jeyoung JIN, Daniel Jerzy PASKA, Venus DANTAS
  • Patent number: 10628369
    Abstract: An information processing system includes a transmission device configured to sequentially transmit a first packet and a second packet containing data to be stored in contiguous logical addresses of a destination device, to the transmission destination device. The first packet includes a first header, and the second packet includes a second header smaller in size than the first header.
    Type: Grant
    Filed: October 5, 2018
    Date of Patent: April 21, 2020
    Assignee: Toshiba Memory Corporation
    Inventors: Kensuke Minato, Takashi Yamaguchi
  • Publication number: 20200111589
    Abstract: A superconducting wire includes a multilayer stack and a covering layer (stabilizing layer or protective layer). The multilayer stack includes a substrate having a main surface and a superconducting material layer formed on the main surface. The covering layer (stabilizing layer or protective layer) is disposed on at least the superconducting material layer. A front surface portion of the covering layer (stabilizing layer or protective layer) located on the superconducting material layer (front surface portion of the stabilizing layer or upper surface of the protective layer) has a concave shape.
    Type: Application
    Filed: September 18, 2019
    Publication date: April 9, 2020
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Takashi YAMAGUCHI, Tatsuoki NAGAISHI, Masaya KONISHI, Kotaro OHKI, Genki HONDA, Tatsuhiko YOSHIHARA
  • Publication number: 20200103296
    Abstract: An electric inertia control device 5A simulates the behavior of an inertial body having a predetermined set moment of inertia Jset by means of a dynamometer, and is provided with: an inertia compensator 51A which generates a torque signal by multiplying a signal obtained by subtracting a shaft torque detection signal T12 from a higher-level command torque signal T* by the ratio of a moment of inertia J1 of the dynamometer to the set moment of inertia Jset, and generates an inertia compensation torque signal Tref by summing the torque signal and the shaft torque detection signal J1; and a resonance suppression control circuit 53A which uses the inertia compensation torque signal Tref and the shaft torque detection signal T12 to generate a torque current command signal T1 in such a way as to suppress resonance in a mechanical system including a test piece and the dynamometer.
    Type: Application
    Filed: April 9, 2018
    Publication date: April 2, 2020
    Inventors: Takashi YAMAGUCHI, Takao AKIYAMA
  • Publication number: 20200098491
    Abstract: A superconducting wire includes: a first wire including a first superconducting material layer having a first main surface; a second wire including a second superconducting material layer having a second main surface; a third wire including a third superconducting material layer having a third main surface; a first superconducting material joining layer that joins the first main surface to the second main surface; and a second superconducting material joining layer that joins the second main surface to the third main surface. The first wire has a first end surface. The third wire has a second end surface. The second end surface faces the first end surface with a space being interposed between the second end surface and the first end surface. The space is more than or equal to 10 nm and less than 1 mm.
    Type: Application
    Filed: May 19, 2017
    Publication date: March 26, 2020
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Kotaro OHKI, Tatsuoki NAGAISHI, Takashi YAMAGUCHI
  • Patent number: 10578189
    Abstract: An ACM-ECU executes a first switching control for switching from a phase fixed control to a phase variable control, or a second switching control for switching from the phase variable control to the phase fixed control, simultaneously with detecting or after having detected switching of a gear position by a gear position detecting function. A current waveform map is used at a time of execution of the phase variable control, and a correction map is used at a time of execution of the phase fixed control.
    Type: Grant
    Filed: September 22, 2017
    Date of Patent: March 3, 2020
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Fumitaka Abe, Satoshi Kono, Takashi Yamaguchi, Takashi Tooyama
  • Patent number: 10568964
    Abstract: A neutron capture therapy system includes a therapy table on which an irradiation target is placed, a neutron beam irradiation unit which irradiates the irradiation target placed on the therapy table with a neutron beam, a position measurement unit which measures a position of the irradiation target placed on the therapy table, and a radiation dose distribution output unit which outputs a radiation dose distribution of a neutron beam used for irradiating the irradiation target, based on an amount of positional misalignment of the position of the irradiation target measured by the position measurement unit.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: February 25, 2020
    Assignees: SUMITOMO HEAVY INDUSTRIES, LTD., KYOTO UNIVERSITY
    Inventors: Takashi Yamaguchi, Tetsuya Mukawa, Hiroki Tanaka
  • Publication number: 20200051714
    Abstract: A superconducting wire according to one embodiment of the present disclosure includes: a substrate having a first surface and a second surface; a superconducting layer having a third surface and a fourth surface; and respective coating layers. The second surface is opposite to the first surface. The fourth surface is opposite to the third surface. The superconducting layer is disposed on the substrate such that the third surface faces the second surface. The respective coating layers are disposed on the first surface and the fourth surface. Adhesion strength between the substrate and the coating layer disposed on the first surface is lower than adhesion strength between the superconducting layer and the coating layer disposed on the fourth surface.
    Type: Application
    Filed: February 14, 2017
    Publication date: February 13, 2020
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Takashi YAMAGUCHI, Tatsuoki NAGAISHI, Masaya KONISHI