Patents by Inventor Hiroshi Kawamura

Hiroshi Kawamura 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: 20250091532
    Abstract: A first structure in which connection strength between an air impermeable layer and a compressed fiber layer is relatively low and a second structure in which connection strength between the air impermeable layer and the compressed fiber layer is higher than the connection strength of the first structure. A vehicular compartment soundproofing structure includes the second structure that has good soundproofing performance in a high frequency band (1000 Hz or higher) and the first structure that has improved soundproofing performance in a middle frequency band with suppressing lowering of insertion loss in the middle frequency band (200 Hz to 630 Hz). Accordingly, the soundproofing performance of a whole vehicular compartment can be improved.
    Type: Application
    Filed: January 20, 2023
    Publication date: March 20, 2025
    Applicants: TOYOTA BOSHOKU KABUSHIKI KAISHA, NIHON TOKUSHU TORYO CO., LTD.
    Inventors: Masahiro NAGANO, Yuji WATANABE, Hiroshi KAWAMURA
  • Patent number: 12212201
    Abstract: A cooling system is provided. Coil ends protrude outward from a first end of a stator core in a direction along a central axis. An imaginary straight line is orthogonal to both of a central axis of a core body and an axis extending in an up-down direction. Half the coil ends above the imaginary straight line are in a first portion. Each of the segment coils in the first portion includes an outer peripheral surface that faces in a direction opposite from the central axis. The outer peripheral surface of each of the segment coils includes a twisted surface. The direction in which the twisted surface faces becomes closer to the direction facing the stator core as the twisted surface extends toward the first end of the stator core.
    Type: Grant
    Filed: May 23, 2022
    Date of Patent: January 28, 2025
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masashi Matsumoto, Kohei Watanabe, Hiroshi Inano, Hazuki Kawamura, Tomoyuki Sawada
  • Publication number: 20250015377
    Abstract: A battery pack is provided and includes a plurality of cylindrical cells arranged in a manner that electrode terminals face the same direction, and an embedded member arranged between a plurality of the cylindrical cells. The embedded member includes a container, and a heat absorbing agent and gas accommodated in the container. The container is provided with a projecting portion arranged between two adjacent ones of the cylindrical cells and extending in a longitudinal direction of the cylindrical cell as viewed from a longitudinal direction of the cylindrical cell. The projecting portion includes a heat absorbing agent accommodation portion in which a heat absorbing agent is accommodated and a gas accommodation portion in which gas is accommodated. The gas accommodation portion is arranged at a tip portion of the projecting portion and is in contact with each of two adjacent ones of the cylindrical cells.
    Type: Application
    Filed: September 18, 2024
    Publication date: January 9, 2025
    Inventors: Yoshiyuki BANNAI, Junichi IKEDA, Hiroshi KAWAMURA
  • Publication number: 20240103422
    Abstract: An image forming apparatus includes an apparatus body including a drive source, a rotary member, and a first coupling movable in an axial direction with respect to the rotary member, and a unit attachable to and detachable from the apparatus body, the unit including a second coupling configured to receive the driving force by engaging with the first coupling. The rotary member includes an abutting portion. The first coupling includes an abutted portion configured to be abutted with the abutting portion, and is configured to rotate in the first rotation direction together with the rotary member in a case where the abutting portion presses the abutted portion. The apparatus body further includes a first urging member configured to urge the first coupling in a second rotation direction opposite to the first rotation direction.
    Type: Application
    Filed: September 8, 2023
    Publication date: March 28, 2024
    Inventors: SHINKICHI YAMAMOTO, HIROSHI KAWAMURA, YUTA KAWAGUCHI, HIDETO CHINO
  • Publication number: 20240073505
    Abstract: An illumination system includes: an irradiation device that irradiates light to a subject located in front of a displayer that displays a background image; an information acquisition device that acquires subject information for identifying the subject; a storage that stores background image information on the background image displayed on the displayer; and a controller that controls irradiation by the irradiation device. The controller generates shape information of the subject on basis of a difference between the subject information acquired by the information acquisition device and the background image information stored in the storage, and sets an irradiation range where light is irradiated by the irradiation device on basis of the shape information.
    Type: Application
    Filed: August 11, 2023
    Publication date: February 29, 2024
    Inventors: Hidemasa KUBOTA, Kinya NOBORI, HIROSHI KAWAMURA, CHIKA HIRAKAWA
  • Publication number: 20230420776
    Abstract: A battery pack is provided and includes two or more secondary batteries having a cylindrical shape and arranged in parallel, and a first lead plate that electrically connects two or more of the secondary batteries. The first lead plate includes a first through hole, and a first wall portion provided on a plate surface on the opposite side to a plate surface having a connection surface connected to a terminal of the secondary battery, and the first wall portion has a first wall surface continuous with an inner peripheral surface of the first through hole.
    Type: Application
    Filed: June 12, 2023
    Publication date: December 28, 2023
    Inventors: Yoshiyuki BANNAI, Junichi IKEDA, Hiroshi KAWAMURA, Ryota MIYAJIMA
  • Publication number: 20230159092
    Abstract: An ECU controls a motor including a first coil group and a second coil group. The ECU calculates a first torque command value and a second torque command value. The ECU uses a first differential torque, which is the difference between a first theoretical output torque and a first predictive output torque, to correct the second torque command value for the second coil group. The ECU uses a second differential torque, which is the difference between a second theoretical output torque and a second predictive output torque, to correct the first torque command value for the first coil group. The ECU uses a corrected first torque command value to control power feeding to the first coil group and uses a corrected second torque command value to control power feeding to the second coil group.
    Type: Application
    Filed: April 27, 2020
    Publication date: May 25, 2023
    Applicants: JTEKT CORPORATION, JTEKT EUROPE S.A.S.
    Inventors: Yuji FUJITA, Hiroshi KAWAMURA, Tahar SLAMA, Baptiste HANSER, Laurent JANEL
  • Patent number: 11505240
    Abstract: A steering control device includes a first control system and a second control system. The first control system includes and a first microcomputer. The first microcomputer is configured to compute a first command value for controlling power supply to a first coil and a second command value for controlling power supply to a second coil. The second control system includes and a second microcomputer. The second microcomputer is configured to compute the first command value and the second command value. The first microcomputer and the second microcomputer are configured to communicate the first command value and the second command value with each other. The cycle of communication between the first microcomputer and the second microcomputer is set to be equal to or shorter than each of the cycles of computations of the first command value and the second command value by the first microcomputer and the second microcomputer.
    Type: Grant
    Filed: December 3, 2019
    Date of Patent: November 22, 2022
    Assignee: JTEKT CORPORATION
    Inventors: Hiroshi Kawamura, Yuji Fujita
  • Patent number: 11508491
    Abstract: An irradiation target is formed into a sphere. The spherical irradiation target can be iridium metal containing natural or enriched iridium. The radiation source can be manufactured by manufacturing a spherical irradiation target, accommodating the spherical irradiation target in a rotating capsule, and rotating an axial flow impeller by a downward flow of a reactor primary coolant, whereby the rotating capsule is rotated. This radiation source provides an improved nondestructive inspection image having a high geometric resolution, and has no radiation source anisotropy and also has high target recyclability.
    Type: Grant
    Filed: December 15, 2020
    Date of Patent: November 22, 2022
    Assignee: CHIYODA TECHNOL CORPORATION
    Inventors: Hiroshi Kawamura, Hidetaka Kanazawa, Takashi Saito, Takashi Ishii
  • Patent number: 11427246
    Abstract: A steering system includes a prioritized torque sensor, a redundant torque sensor, a controller, a first signal line, a second signal line, and a common signal line. Each of the first signal line and the second signal line connects the prioritized torque sensor and the controller. The common signal line connects the redundant torque sensor and the controller. The prioritized torque sensor is configured to transmit, via the first signal line, a first prioritized detection signal. The prioritized torque sensor is configured to transmit, via the second signal line, a second prioritized detection signal. The redundant torque sensor is configured to transmit, via the common signal line, a first redundant detection signal and a second redundant detection signal.
    Type: Grant
    Filed: December 10, 2019
    Date of Patent: August 30, 2022
    Assignee: JTEKT CORPORATION
    Inventors: Hiroshi Kawamura, Yuji Fujita
  • Patent number: 11404992
    Abstract: A motor control device includes a plurality of control units corresponding to a plurality of windings which is provided in a motor. The plurality of control units includes a master control unit, a slave control unit, and at least one abnormality monitoring unit. The slave control unit is configured to generate a power supply control command value using information which is acquired through a path other than communication between the control units and which is held for use in control of supply of electric power to the windings in a normal state in which an abnormality in communication between the control units is not detected and to perform backup control for holding the power supply control command value until the abnormality monitoring unit fixes an abnormality in communication between the control units after detecting the abnormality in communication.
    Type: Grant
    Filed: April 5, 2021
    Date of Patent: August 2, 2022
    Assignee: JTEKT CORPORATION
    Inventors: Yosuke Nakamura, Hiroshi Kawamura
  • Publication number: 20220189650
    Abstract: An irradiation target is formed into a sphere. The spherical irradiation target can be iridium metal containing natural or enriched iridium. The radiation source can be manufactured by manufacturing a spherical irradiation target, accommodating the spherical irradiation target in a rotating capsule, and rotating an axial flow impeller by a downward flow of a reactor primary coolant, whereby the rotating capsule is rotated. This radiation source provides an improved nondestructive inspection image having a high geometric resolution, and has no radiation source anisotropy and also has high target recyclability.
    Type: Application
    Filed: December 15, 2020
    Publication date: June 16, 2022
    Applicant: CHIYODA TECHNOL CORPORATION
    Inventors: Hiroshi KAWAMURA, Hidetaka KANAZAWA, Takashi SAITO, Takashi ISHII
  • Patent number: 11251732
    Abstract: A motor control device includes processing circuitry configured to calculate a current command value corresponding to torque that should be generated by a motor, divide the calculated current command value into individual current command values for coil groups, control power feeding to the coil groups independently for each of the coil groups based on a corresponding one of the individual current command values, set, for each one of the coil groups, an upper limit value of a corresponding one of the individual current command values and, when the individual current command value for any one of the coil groups is limited to a value that is smaller than a corresponding one of the upper limit values, supplement an amount limited in the individual current command value by increasing the individual current command value for at least a remaining one of the coil groups.
    Type: Grant
    Filed: October 25, 2019
    Date of Patent: February 15, 2022
    Assignees: JTEKT CORPORATION, JTEKT EUROPE S.A.S.
    Inventors: Hiroshi Kawamura, Yuji Fujita, Xavier Palandre, Tahar Slama
  • Patent number: 11208143
    Abstract: In a control device for a steering mechanism, the steering mechanism includes a motor that includes a plurality of coils. The plurality of coils include a first coil and a second coil. The control device includes a first control system and a second control system configured to compute a command value for torque of the motor to be applied to the steering mechanism. The first control system and the second control system are each configured to control power supply to the plurality of coils of the motor based on the command value. The first control system includes a first microcomputer that has first characteristics, and the second control system includes a second microcomputer that has second characteristics that are different from the first characteristics.
    Type: Grant
    Filed: December 20, 2019
    Date of Patent: December 28, 2021
    Assignee: JTEKT CORPORATION
    Inventors: Hiroshi Kawamura, Yuji Fujita
  • Patent number: 11168831
    Abstract: An attachment mechanism for electronic equipment for an engine includes a bracket configured to hold the electronic equipment and a plurality of support portions configured to elastically support the bracket with respect to a head cover of the engine. The support portions are disposed such that a maximum distance between two support portions of the support portions in a direction parallel to a shaft center of a crankshaft of the engine is longer than a maximum distance between the two support portions of the support portions in a direction perpendicular to the shaft center of the crankshaft of the engine.
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: November 9, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Hiroshi Kawamura
  • Publication number: 20210320607
    Abstract: A motor control device includes a plurality of control units corresponding to a plurality of windings which is provided in a motor. The plurality of control units includes a master control unit, a slave control unit, and at least one abnormality monitoring unit. The slave control unit is configured to generate a power supply control command value using information which is acquired through a path other than communication between the control units and which is held for use in control of supply of electric power to the windings in a normal state in which an abnormality in communication between the control units is not detected and to perform backup control for holding the power supply control command value until the abnormality monitoring unit fixes an abnormality in communication between the control units after detecting the abnormality in communication.
    Type: Application
    Filed: April 5, 2021
    Publication date: October 14, 2021
    Applicant: JTEKT CORPORATION
    Inventors: Yosuke NAKAMURA, Hiroshi KAWAMURA
  • Patent number: 11027772
    Abstract: A motor controller is configured to control a motor including a plurality of winding groups. The motor controller includes a plurality of processors. Each of the processors is configured to independently control supply of driving electric power to each of the winding groups. When an abnormality occurs in which a torque to be generated in one of the winding groups is smaller than an individual rated torque and when a target overall torque is larger than a total of the individual rated torque for the winding group in which the abnormality does not occur, the processor, controlling supply of driving electric power to the winding group in which the abnormality does not occur, out of the plurality of processors controls supply of the driving electric power such that the winding group generate a torque larger than the individual rated torque.
    Type: Grant
    Filed: December 19, 2019
    Date of Patent: June 8, 2021
    Assignee: JTEKT CORPORATION
    Inventors: Hiroshi Kawamura, Yuji Fujita
  • Patent number: 10859950
    Abstract: An image forming apparatus includes an intermediary transfer belt, first to third image bearing members, a driving member, and first and second drive transmission members, and includes first to third transfer positions. A first inter-transfer-position distance between the first and second transfer positions and a second inter-transfer-position distance between the second and third transfer positions are different from each other. The first inter-transfer-position distance is set at “N×A” and the second inter-transfer-position distance is set at “N×A±N×A/i”, where N is an integer of rotations of the driving member during to movement of the belt in the first inter-transfer-position distance, A is a distance of movement of the belt when the driving member rotates through one full circumference, and i is a transmission ratio between the first and second drive transmission members.
    Type: Grant
    Filed: March 6, 2020
    Date of Patent: December 8, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazushi Ino, Hiroyuki Yamazaki, Hiroshi Kawamura
  • Patent number: 10800448
    Abstract: Provided is a steering control apparatus configured to suppress the occurrence of abnormalities in components in respective systems at the same timing. A first assist torque calculation circuit calculates a first command value and a second command value based on a steering torque. A first current feedback control circuit calculates a control signal by using the first command value. A second current feedback control circuit calculates a control signal by using the second command value. When the steering torque is equal to or smaller than a steering torque threshold, the first assist torque calculation circuit executes calculation so that the first command value is larger than the second command value. After the steering torque exceeds the steering torque threshold, the first assist torque calculation circuit executes calculation so that the first command value is equal to the second command value.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: October 13, 2020
    Assignee: JTEKT CORPORATION
    Inventors: Yuji Fujita, Hiroshi Kawamura, Xavier Joseph Palandre
  • Patent number: 10794483
    Abstract: A spool valve includes a spool in a spool insertion hole defined in a valve body. The spool is configured to be moved by an electric motor via a ball-screw to a first position where an input port is in communication with an output port, while the output port is not in communication with a drain port, and to a second position where the input port is not in communication with the output port, while the output port is in communication with the drain port.
    Type: Grant
    Filed: July 17, 2015
    Date of Patent: October 6, 2020
    Assignee: NTN CORPORATION
    Inventors: Kyohei Sasanuma, Takayuki Norimatsu, Naoshi Hattori, Takahide Saito, Hiroshi Kawamura