Patents by Inventor Yuki Ishikawa

Yuki Ishikawa 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: 20210167667
    Abstract: The motor unit includes: a motor having a motor shaft that rotates around a motor axis extending along a horizontal direction; a gear section connected to the motor shaft on one side of the motor shaft in an axial direction; a housing that houses the motor and the gear section; and an oil contained in the housing. The housing includes a motor housing section that has inside a motor chamber for housing the motor, and a gear housing section that has inside a gear chamber for housing the gear section. The housing is provided with an oil passage along which the oil circulates for cooling the motor. A pump that supplies the oil to the motor is provided in a channel of the oil passage. The pump has a pump motor. A rotation axis of the pump motor is parallel to the motor axis.
    Type: Application
    Filed: December 20, 2018
    Publication date: June 3, 2021
    Inventors: Yuki ISHIKAWA, Takanobu OYAMA, Keisuke FUKUNAGA
  • Patent number: 11022112
    Abstract: A drive apparatus to be mounted on a vehicle includes a motor body including a rotor to rotate about a central axis extending in a horizontal direction perpendicular to a direction of travel of the vehicle, and a stator radially outside of the rotor, a housing including a housing portion to house the motor body, oil in a vertically lower region of the housing portion, and a pump to move the oil from the vertically lower region of the housing portion to feed the oil to the motor body. A liquid surface of the oil in the vertically lower region of the housing portion approaches the central axis to bring the oil into contact with the rotor as a result of the vehicle being inclined forward or rearward in the direction of travel.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: June 1, 2021
    Assignee: NIDEC CORPORATION
    Inventors: Yasuo Yamaguchi, Yuki Ishikawa
  • Publication number: 20210143121
    Abstract: A copper paste for pressureless bonding is a copper paste for pressureless bonding, containing: metal particles; and a dispersion medium, in which the metal particles include sub-micro copper particles having a volume average particle diameter of greater than or equal to 0.01 ?m and less than or equal to 0.8 ?m, and micro copper particles having a volume average particle diameter of greater than or equal to 2.0 ?m and less than or equal to 50 ?m, and the dispersion medium contains a solvent having a boiling point of higher than or equal to 300° C., and a content of the solvent having a boiling point of higher than or equal to 300° C. is greater than or equal to 2 mass % on the basis of a total mass of the copper paste for pressureless bonding.
    Type: Application
    Filed: January 21, 2021
    Publication date: May 13, 2021
    Inventors: Hideo NAKAKO, Kazuhiko KURAFUCHI, Yoshinori EJIRI, Dai ISHIKAWA, Chie SUGAMA, Yuki KAWANA
  • Publication number: 20210116742
    Abstract: According to one embodiment, a display device comprises a display panel and a polarizing plate. The display panel comprises a display area, a non-display area surrounding the display area, and a light-shielding layer arranged in the display area and the non-display area. The polarizing plate is provided on a surface of the display panel, and including an end portion located in the non-display area. In this display device, the light-shielding layer opposite to the end portion of the polarizing plate is at least partially removed.
    Type: Application
    Filed: December 28, 2020
    Publication date: April 22, 2021
    Applicant: Japan Display Inc.
    Inventors: Tomokazu ISHIKAWA, Yuki KURAMOTO, Haruki YAMADA, Katsuhiro KATO
  • Publication number: 20210089952
    Abstract: A model estimator (11) estimates a model function of an analyzing system (20) based on target observation data and reference observation data. For this estimation, the amount of variation between the model of the target system and that of a reference model is estimated from the target observation data and reference observation data. The model function of the target model is estimated after the observation data are corrected based on the estimated amount of variation. A parameter determiner (12) calculates an acquisition function based on the mean and covariance of the model function, and determines a parameter value for the next observation, using the acquisition function. A data acquirer (13) sets the parameter value in the analyzing system (20) and acquires a corresponding observed value. A loop process with the feedback of the observation data is repeated to determine an optimal parameter value.
    Type: Application
    Filed: April 24, 2019
    Publication date: March 25, 2021
    Applicant: SHIMADZU CORPORATION
    Inventors: Yusuke TAGAWA, Yuki ISHIKAWA
  • Patent number: 10958136
    Abstract: A drive apparatus includes a motor that includes a motor shaft disposed along a first central axis that extends in one direction, a housing that includes a first housing portion housing the motor and that is capable of storing oil, and a liquid cooling portion disposed in thermal contact with an inverter electrically coupled to the motor, the liquid cooling portion including a refrigerant liquid flowing therein. The housing includes a contact portion with which the liquid cooling portion is in thermal contact. At least a portion of the contact portion is disposed below an oil surface of the oil stored in the housing.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: March 23, 2021
    Assignee: NIDEC CORPORATION
    Inventors: Yasuo Yamaguchi, Takayuki Migita, Yuki Ishikawa
  • Patent number: 10958137
    Abstract: In a drive device, a housing includes an outer lid that covers one side in an axial direction of a motor shaft. A pump includes an external gear fixed to an end on one side in the axial direction of the motor shaft, an internal gear surrounding a radial outside of the external gear and meshing with the external gear, a pump room recessed from a surface on the other side in the axial direction of an outer lid toward one side in the axial direction, the pump room accommodating the internal gear and the external gear, a suction port through which the oil is to be sucked into the pump room, and a discharge port through which the oil is to be discharged from the pump room. The motor shaft includes a motor shaft body to which a rotor core is fixed and a closer fixed to the motor shaft body to overlap the internal gear and close at least a portion of the opening on the other side in the axial direction of the pump room.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: March 23, 2021
    Assignee: NIDEC CORPORATION
    Inventors: Takayuki Migita, Yuki Ishikawa, Shuhei Nakamatsu
  • Publication number: 20210083548
    Abstract: A motor assembly includes a motor, a housing including a housing space to house the motor, oil in a vertically lower region of the housing space, and an oil passage to lead the oil from the vertically lower region of the housing space through the motor to the vertically lower region of the housing space. The oil passage includes a first oil passage extending through an inside of the motor, and a second oil passage extending through an outside of the motor. One of the first oil passage and the second oil passage includes a cooler to cool the oil therein.
    Type: Application
    Filed: November 2, 2020
    Publication date: March 18, 2021
    Inventors: Yasuo YAMAGUCHI, Takayuki MIGITA, Yuki ISHIKAWA
  • Publication number: 20210060907
    Abstract: Provided is an interlayer film for laminated glass capable of enhancing the sound insulating property over a wide range of temperature from 10° C. to 30° C. An interlayer film for laminated glass according to the present invention is an interlayer film for laminated glass having a one-layer structure or a two or more-layer structure, the interlayer film includes a layer containing a cured product, the cured product is a cured product of a photocurable compound or a moisture-curable compound, and in viscoelasticity measurement at a frequency of 1 Hz and in a shearing mode for the layer containing a cured product, a peak temperature of tan ? is ?50° C. or more and 30° C. or less, and tan ? at the peak temperature of tan ? is 2.0 or more.
    Type: Application
    Filed: January 30, 2019
    Publication date: March 4, 2021
    Inventors: Yuki Ishikawa, Shinji Kawada, Tatsuya Iwamoto
  • Publication number: 20210046740
    Abstract: Provided is an interlayer film for laminated glass capable of enhancing the sound insulating property over a wide temperature range with width of at least 15° C. in a temperature region from 10° C. to 30° C. An interlayer film for laminated glass according to the present invention is an interlayer film for laminated glass having a two or more-layer structure, the interlayer film includes a layer containing a cured product or a polyolefin resin, the cured product is a cured product of a photocurable compound or a moisture-curable compound, the layer containing a cured product or a polyolefin resin has a glass transition temperature of ?10° C. or more and 0° C. or less, tan ? at the glass transition temperature of the resin layer of 2.5 or more, and a storage modulus G? at ?5° C. of the resin layer of 3.0×104 Pa or more and 5.0×106 Pa or less.
    Type: Application
    Filed: January 30, 2019
    Publication date: February 18, 2021
    Inventors: Tatsuya Iwamoto, Yuki Ishikawa, Shinji Kawada
  • Publication number: 20210044173
    Abstract: According to one aspect of the present disclosure, a driving device is a driving device for rotating an axle of a vehicle and includes: a motor having a rotor rotating about a motor axis extending in a horizontal direction orthogonal to a vertical direction; a reduction gear connected to the rotor; a differential gear connected to the motor via the reduction gear; and a housing configured to house the motor, the reduction gear and the differential gear therein. The housing has a protrusion that protrudes upward in the vertical direction, and at least one circumferential rib that extends in a circumferential direction. The protrusion has a female screw hole into which an eye bolt can be tightened. At least one of the circumferential ribs is connected to the protrusion.
    Type: Application
    Filed: March 22, 2019
    Publication date: February 11, 2021
    Inventors: Yuki ISHIKAWA, Hayato NAKAMA, Keisuke FUKUNAGA
  • Publication number: 20210044181
    Abstract: A motor unit includes a motor having a motor shaft extending along a first direction, an inverter that supplies electric power to the motor, a housing that supports the motor therein, an inverter case that is fixed to one side of the housing in a second direction orthogonal to the first direction and that houses the inverter, and a plurality of bolts that fasten the housing and the inverter case. The plurality of bolts include a first bolt extending along the first direction, a second bolt extending along the second direction, a third bolt extending along a third direction orthogonal to both the first direction and the second direction, and one or more fourth bolts extending in a fourth direction intersecting all of the first direction, the second direction and the third direction.
    Type: Application
    Filed: March 27, 2019
    Publication date: February 11, 2021
    Inventors: Yuki ISHIKAWA, Yohei MIYATA
  • Publication number: 20210039360
    Abstract: Provided is an interlayer film for laminated glass capable of enhancing the sound insulating property over a wide range of temperature from 0° C. to 40° C. An interlayer film for laminated glass according to the present invention is an interlayer film for laminated glass having a one-layer structure or a two or more-layer structure, the interlayer film includes a resin layer, and a ratio of a first storage modulus G? at a peak temperature of a maximum peak of tan ? to a second storage modulus G? at a temperature 100° C. higher than the peak temperature of the maximum peak of tan ? is 50 or more and 500 or less in viscoelasticity measurement at a frequency of 1 Hz in a shearing mode.
    Type: Application
    Filed: January 30, 2019
    Publication date: February 11, 2021
    Inventors: Yuki Ishikawa, Shinji Kawada, Tatsuya Iwamoto, Nobuo Matsuki
  • Patent number: 10916992
    Abstract: A drive device includes a rotor, a stator, a housing including an accommodation portion to store oil, a pump driven through a motor shaft, and a transmission that transmits rotation of the motor shaft to a pump shaft. The pump includes an external gear fixed to the pump shaft, an internal gear surrounding the external gear and meshing with the external gear, a pump room provided in the housing and accommodating the internal gear and the external gear, a suction port through which the oil is to be sucked into the pump room, and a discharge port through which the oil is to be discharged from the pump room. The housing includes a first oil passage connected to the discharge port. The motor shaft includes a second oil passage provided in the motor shaft and connected to the first oil passage and a first through-hole connecting the second oil passage and an outer circumferential surface of the motor shaft.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: February 9, 2021
    Assignee: NIDEC CORPORATION
    Inventors: Yasuo Yamaguchi, Yuki Ishikawa
  • Publication number: 20210031495
    Abstract: Provided is an interlayer film for laminated glass capable of enhancing the interlayer adhesive force, and enhancing the sound insulating property after a lapse of a certain period of time from production of the interlayer film. An interlayer film for laminated glass according to the present invention is an interlayer film for laminated glass having a one-layer or a two or more-layer structure, a compound obtained by trimethylsilylating the polyvinyl acetate in the presence of N,O-bis(trimethylsilyl)trifluoroacetamide shows a hydrogen peak of trimethylsilyl group existing at 0.06 ppm or more and 0.3 ppm or less in 1H-NMR measurement in chloroform-d, and a ratio of peak intensity of all peaks existing at 0.06 ppm or more and 0.3 ppm or less, to intensity of all peaks existing at 4.5 ppm or more and 5.3 ppm or less satisfies 0.02 or more and 3 or less.
    Type: Application
    Filed: January 30, 2019
    Publication date: February 4, 2021
    Inventors: Masumi Okitsuka, Yuki Ishikawa, Mika Matsuda
  • Patent number: 10910918
    Abstract: A motor includes a rotor to rotate about a motor axis, and a stator radially outside of the rotor. The rotor includes a shaft extending along the motor axis, a rotor core surrounding the shaft from radially outside, a plate-shaped end plate at an axial end portion of the rotor core, and a cover portion at the axial end portion of the rotor core with the end plate intervening between the cover portion and the rotor core. The end plate includes a plate through hole extending in an axial direction, a first recessed portion extending radially inward from the plate through hole, and a second recessed portion extending radially outward from the plate through hole. The first recessed portion opens radially inward in the end plate. The first recessed portion includes an axially-facing opening covered with the rotor core. The second recessed portion includes an axially-facing opening including a covered portion covered with the cover portion, and an open portion not covered with the cover portion.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: February 2, 2021
    Assignee: NIDEC CORPORATION
    Inventors: Shuhei Nakamatsu, Yuki Ishikawa, Takayuki Migita
  • Patent number: 10903705
    Abstract: A motor includes a rotor to rotate about a motor axis, and a stator radially outside of the rotor. The rotor includes a shaft extending along the motor axis, and a rotor core surrounding the shaft from radially outside. The shaft includes a hollow portion including an inner circumferential surface extending along an axial direction, and a communicating hole extending in a radial direction to bring a space outside of the shaft and the hollow portion into communication with each other, the hollow portion being structured to allow oil to be fed thereinto. The inner circumferential surface of the hollow portion includes a recessed groove extending along a circumferential direction. The communicating hole opens into the hollow portion at the recessed groove.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: January 26, 2021
    Assignee: NIDEC CORPORATION
    Inventors: Yuki Ishikawa, Takayuki Migita
  • Publication number: 20200408297
    Abstract: A drive apparatus includes a motor, a transmission system, and a housing having a motor housing accommodating the motor and a gear housing accommodating the transmission system. The transmission system includes a first gear supported by a first bearing and a second gear supported by a second bearing. The gear housing includes first and second holding portions holding the first and second bearings. Surrounding ribs project from a wall surface of the gear housing, and surround an area that encompasses the first and second bearings when viewed in an axial direction. The surrounding ribs include arc-shaped ribs along outer circumferential edges of the first and second bearings, and straight ribs connected to the arc-shaped ribs. One or more of the straight ribs are each located on a common tangent to the first bearing and the second bearing.
    Type: Application
    Filed: June 16, 2020
    Publication date: December 31, 2020
    Inventors: Yuki ISHIKAWA, Keigo NAKAMURA
  • Patent number: 10879769
    Abstract: A motor unit includes a motor including a rotor to rotate about a motor axis extending in a horizontal direction, a differential connected to the motor, a housing including a housing space to house the motor and the differential, oil in a vertically lower region of the housing space, and an oil passage to feed the oil from the vertically lower region of the housing space to the motor. A pump is fixed to an outer peripheral surface of the housing and is located in a channel of the oil passage. The pump is on an opposite side of the motor axis with respect to the differential when viewed in an axial direction of the motor axis.
    Type: Grant
    Filed: August 8, 2017
    Date of Patent: December 29, 2020
    Assignee: NIDEC CORPORATION
    Inventors: Yuki Ishikawa, Yasuo Yamaguchi, Takayuki Migita
  • Publication number: 20200403544
    Abstract: In the work device that has a self-holding circuit (61) maintaining power supply from a power supply circuit (12) by output from a microcomputer (40) and has a structure in which stopping output to the self-holding circuit (61) causes interruption of power supply from the power supply circuit (12) to the microcomputer (40), the firmware of the microcomputer (40) is made to be rewritable and a power holding unit (condenser (C1)) for temporarily continuing power supply to the microcomputer (40) is provided, thereby realizing a so-called “off-delay timer function” for restarting the microcomputer (40). This configuration enables maintenance of power to the microcomputer (40) after update of the firmware even in a work device that cannot be restarted once power has been turned off unless trigger operation is performed, thereby enabling automatic restart of the microcomputer 40 after resetting is enabled.
    Type: Application
    Filed: February 22, 2019
    Publication date: December 24, 2020
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Yuki ISHIKAWA, Hayato Yamaguchi, Tomomasa NISHIKAWA, Masashi TAKEHISA, Tatsuya ITO