Patents by Inventor Kenji Hama

Kenji Hama 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: 11958219
    Abstract: The present disclosure provides a foam molded product and a manufacturing method. The foam molded product is includes a foam body, an insert material having a display unit or a detection unit attached to the foam body, and a surface material affixed to a surface to which at least the insert material is attached. A manufacturing method includes: preparing a pair of molds including a first mold and a second mold; affixing an insert material and a surface material together such that the surface material is in contact with a molding surface of the first mold; closing the pair of molds; injecting a foam resin into a molding space formed by closing the molds; foaming the foam resin to form a foam body; opening the pair of molds; and removing a molded product in which the affixed part and the foam body are integrated.
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: April 16, 2024
    Assignee: NISSHA CO., LTD.
    Inventors: Tatsuo Ito, Kenji Okumura, Jun Sasaki, Daichi Hama, Masaru Terashita
  • Patent number: 11923833
    Abstract: For example, the switching drive device 100 includes a driver 30 configured to drive an N-type semiconductor switch element, a current limiter 50 configured to limit a current fed to a boot capacitor BC1 included in a bootstrap circuit BTC, and a current controller 60 configured to control the operation of the current limiter 50. The current controller 60 is configured to drive the current limiter 50 to limit the current fed to the boot capacitor BC1 when the charge voltage across the boot capacitor BC1 is higher than a threshold value.
    Type: Grant
    Filed: January 15, 2019
    Date of Patent: March 5, 2024
    Assignee: ROHM CO., LTD.
    Inventors: Kenji Hama, Takahiro Kotani
  • Publication number: 20230178461
    Abstract: A semiconductor device includes a substrate, a conductive portion, a sealing resin, a plurality of semiconductor chips, and a plurality of temperature detection elements. The substrate has a substrate obverse surface and a substrate reverse surface that face opposite sides in a thickness direction. The conductive portion is formed on the substrate obverse surface. The sealing resin covers at least a part of the substrate. The sealing resin also covers the entire conductive portion. The plurality of semiconductor chips are disposed on the substrate obverse surface. The plurality of temperature detection elements are disposed on the substrate obverse surface. The number of temperature detection elements is equal to or greater than the number of semiconductor chips.
    Type: Application
    Filed: March 31, 2021
    Publication date: June 8, 2023
    Inventors: Kenji HAMA, Yuji ISHIMATSU, Hideo HARA
  • Publication number: 20230121777
    Abstract: An electronic device includes: a substrate with obverse and reverse surfaces spaced apart in a thickness direction; an electronic element having an obverse surface formed with a first obverse surface electrode; a wiring portion on the substrate obverse surface and configured to transmit a control signal for the electronic element; a conduction member with obverse and reverse surfaces spaced apart in the thickness direction, where the reverse surface is joined to the wiring portion; a conductive first lead on the substrate obverse surface; and a first connecting member joined to the obverse surface of the conduction member and the first obverse surface electrode. The first lead includes a first pad portion spaced apart from the wiring portion and to which the electronic element is joined. The wiring portion and the first obverse surface electrode are electrically connected to each other via the conduction member and the first connecting member.
    Type: Application
    Filed: March 22, 2021
    Publication date: April 20, 2023
    Inventors: Yuji ISHIMATSU, Kenji HAMA, Hideo HARA
  • Publication number: 20230109471
    Abstract: An electronic device includes: an insulating substrate including an obverse surface facing a thickness direction; a wiring portion formed on the substrate obverse surface and made of a conductive material; a lead frame arranged on the substrate obverse surface; a first and a second semiconductor elements electrically connected to the lead frame; and a first control unit electrically connected to the wiring portion to operate the first semiconductor element as a first upper arm and operate the second semiconductor element as a first lower arm. The lead frame includes a first pad portion to which the first semiconductor element is joined and a second pad portion to which the second semiconductor element is joined. The first and second pad portions are spaced apart from the wiring portion and arranged in a first direction with a first separation region sandwiched therebetween, where the first direction is orthogonal to the thickness direction.
    Type: Application
    Filed: March 22, 2021
    Publication date: April 6, 2023
    Inventors: Yuji ISHIMATSU, Kenji HAMA, Hideo HARA
  • Publication number: 20230083231
    Abstract: An electronic device includes a first electronic component including a first main body, a second electronic component including a second main body, a mounting substrate having a mounting surface, and a heat dissipator having an attaching surface. The mounting surface and the attaching surface face each other in the z direction. The first main body and the second main body are disposed between the mounting substrate and the heat dissipator in the z direction and arranged side by side in the x direction. The first main body has a first front surface facing the attaching surface and a first back surface facing the mounting surface. The second main body has a second front surface facing the attaching surface and a second back surface facing the mounting surface. The dimension of the second main body in the z direction is smaller than the dimension of the first main body in the z direction. The first front surface and the second front surface overlap with each other as viewed in the x direction.
    Type: Application
    Filed: February 15, 2021
    Publication date: March 16, 2023
    Inventors: Yuji ISHIMATSU, Kenji HAMA, Hideo HARA
  • Publication number: 20230052108
    Abstract: A semiconductor device includes a substrate, a conductive part, a controller module and a sealing resin. The substrate has a substrate obverse surface and a substrate reverse surface facing away from each other in a z direction. The conductive part is made of an electrically conductive material on the substrate obverse surface. The controller module is disposed on the substrate obverse surface and electrically connected to the conductive part. The sealing resin covers the controller module and at least a portion of the substrate. The conductive part includes an overlapping wiring trace having an overlapping portion overlapping with the electronic component as viewed in the z direction. The overlapping portion of the overlapping wiring trace is not electrically bonded to the controller module.
    Type: Application
    Filed: February 12, 2021
    Publication date: February 16, 2023
    Inventors: Kenji HAMA, Yuji ISHIMATSU, Hideo HARA
  • Patent number: 11502675
    Abstract: A switch driving device includes a gate driver, a bootstrap circuit, a current limiting portion, and a current control portion. The gate driver drives an N-type semiconductor switch element. The bootstrap circuit includes a boot capacitor and a boot diode and applies a voltage to the gate driver. The current limiting portion limits a current to be supplied to the boot capacitor. The current control portion controls operations of the current limiting portion. The current limiting portion is provided on a path that electrically connects the boot capacitor and the boot diode to each other.
    Type: Grant
    Filed: February 3, 2020
    Date of Patent: November 15, 2022
    Assignee: ROHM CO., LTD.
    Inventor: Kenji Hama
  • Publication number: 20220094346
    Abstract: A switch driving device includes a gate driver, a bootstrap circuit, a current limiting portion, and a current control portion. The gate driver drives an N-type semiconductor switch element. The bootstrap circuit includes a boot capacitor and a boot diode and applies a voltage to the gate driver. The current limiting portion limits a current to be supplied to the boot capacitor. The current control portion controls operations of the current limiting portion. The current limiting portion is provided on a path that electrically connects the boot capacitor and the boot diode to each other.
    Type: Application
    Filed: February 3, 2020
    Publication date: March 24, 2022
    Inventor: Kenji HAMA
  • Publication number: 20210044290
    Abstract: For example, the switching drive device 100 includes a driver 30 configured to drive an N-type semiconductor switch element, a current limiter 50 configured to limit a current fed to a boot capacitor BC1 included in a bootstrap circuit BTC, and a current controller 60 configured to control the operation of the current limiter 50. The current controller 60 is configured to drive the current limiter 50 to limit the current fed to the boot capacitor BC1 when the charge voltage across the boot capacitor BC1 is higher than a threshold value.
    Type: Application
    Filed: January 15, 2019
    Publication date: February 11, 2021
    Inventors: Kenji HAMA, Takahiro KOTANI
  • Patent number: 9085234
    Abstract: A vehicle includes a fuel tank disposed adjacent to a propeller shaft in a widthwise direction of the vehicle, and a differential unit coupled to a rear end of the propeller shaft. The differential unit includes a differential gear coupled to the rear end of the propeller shaft, a housing positioned rearward of the fuel tank to accommodate the differential gear, a bracket member fixed to the rear sub-frame, a plurality of bolts that fasten the housing and a first bracket together, and a stay member provided separate from the bolts to couple the housing and the first bracket together.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: July 21, 2015
    Assignee: HONDA MOTOR CO., LTD
    Inventors: Yuichiro Saneyoshi, Kenji Hama, Makoto Nishida
  • Patent number: 8461795
    Abstract: A motor drive device in which the torque vector of the motor is controlled so that the correlation between the number of pulses of a clock signal and the phase of the torque vector of the motor is held in common for multiple excitation methods. The excitation method having the greatest number of steps is used as a reference, and the torque vector of the motor is maintained in the same phase as before switching when the excitation method is switched. The torque vector is in the closest phase in the rotation direction of the motor when there is no phase that is the same as the phase prior to switching.
    Type: Grant
    Filed: June 22, 2010
    Date of Patent: June 11, 2013
    Assignee: Rohm Co., Ltd.
    Inventors: Motohiro Ando, Kenji Hama
  • Publication number: 20120313361
    Abstract: A vehicle includes a fuel tank disposed adjacent to a propeller shaft in a widthwise direction of the vehicle, and a differential unit coupled to a rear end of the propeller shaft. The differential unit includes a differential gear coupled to the rear end of the propeller shaft, a housing positioned rearward of the fuel tank to accommodate the differential gear, a bracket member fixed to the rear sub-frame, a plurality of bolts that fasten the housing and a first bracket together, and a stay member provided separate from the bolts to couple the housing and the first bracket together.
    Type: Application
    Filed: June 8, 2012
    Publication date: December 13, 2012
    Applicant: HONDA MOTOR CO., LTD
    Inventors: Yuichiro Saneyoshi, Kenji Hama, Makoto Nishida
  • Publication number: 20100320955
    Abstract: In the motor drive device (1) of the present invention, a signal generator (2) for generating control signals DVS of a parallel input method from control signals INS of a clock input method is configured so as to generate control signals DVS of the second input method from the control signals INS of the first input method and to control the torque vector of the motor (4) so that the correlation between the number of pulses of the clock signal CLK and the phase of the torque vector of the motor (4) is held in common for all the excitation methods, with the excitation method having the greatest number of steps being used as a reference, that the torque vector of the motor (4) as a rule is maintained in the same phase as before switching when the excitation method is switched, and that the torque vector is in the closest phase in the rotation direction of the motor (4) in a case in which there is no phase that is the same as the phase prior to switching.
    Type: Application
    Filed: June 22, 2010
    Publication date: December 23, 2010
    Applicant: Rohm Co., Ltd.
    Inventors: Motohiro Ando, Kenji Hama
  • Patent number: 5534334
    Abstract: The present invention relates to base fabrics for ink ribbons used in impact printers, not allowing the graphic spots to occur.They are woven fabrics composed of synthetic multi-filament yarns, the warp of which are 30 to 50 D in yarn thickness and 330 T/M to 600 T/M in the number of twist.
    Type: Grant
    Filed: May 3, 1994
    Date of Patent: July 9, 1996
    Assignee: Toray Industries, Inc.
    Inventors: Kenji Hama, Nobutake Hiroe, Junko Kuroda