Patents by Inventor Akira Sakamoto

Akira Sakamoto 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: 11970580
    Abstract: A room-temperature-curable organopolysiloxane composition for an oil seal, wherein an organosilane compound containing a specific organo-oxymethyl group and represented by formula (1) below and/or a partial hydrolysis condensate of said compound is used as a curing agent (crosslinking agent), and an organic compound having a guanidine skeleton is added in combination as a curing catalyst. In the formula, each R1 is independently a C1-12 unsubstituted or substituted monovalent hydrocarbon group, R2 is a C1-12 unsubstituted or substituted monovalent hydrocarbon group, Y is a hydrolyzable group, and n is 0, 1 or 2.
    Type: Grant
    Filed: March 26, 2020
    Date of Patent: April 30, 2024
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Akira Uta, Shigeki Yasuda, Tetsuro Yamada, Munenao Hirokami, Taiki Katayama, Takafumi Sakamoto
  • Publication number: 20240132049
    Abstract: A control apparatus for a rotating electric machine is provided. The rotating electric machine includes a moving portion that applies torque to a drive shaft of an internal combustion engine. The control apparatus acquires a rotational frequency signal that is a signal that changes depending on a rotational frequency of the moving portion per unit time. The control apparatus calculates a damping torque that is applied from the moving portion to the drive shaft to suppress vibration during operation of the internal combustion engine. The control apparatus calculates the damping torque based on the rotational frequency signal acquired by the signal acquiring unit in response to the rotating electric machine performing cranking of the internal combustion engine.
    Type: Application
    Filed: December 29, 2023
    Publication date: April 25, 2024
    Applicant: DENSO CORPORATION
    Inventors: Syuya KAMIZONO, Akira Sakamoto, Yuichi Handa, Masaki Amakawa, Keisuke Kawai
  • Publication number: 20240123834
    Abstract: A control device includes a switching control unit, an information acquisition unit, and a difference acquisition unit. The switching control unit performs switching control that increases braking torque of the braking device while decreasing braking torque of the rotating electrical machine, when a vehicle is decelerated. The information acquisition unit acquires information on a state of the vehicle. The difference acquisition unit acquires a braking torque difference indicating a difference between braking torque required for keeping a stopped state of the vehicle and braking torque of the braking device, when the vehicle is stopped. After the information acquisition unit detects the stopped state of the vehicle, the switching control unit corrects output torque of the rotating electrical machine based on the braking torque difference.
    Type: Application
    Filed: December 15, 2023
    Publication date: April 18, 2024
    Applicant: DENSO CORPORATION
    Inventors: Haibo LIU, Keisuke Kawai, Akira Sakamoto, Shigeru Kamio, Tatsuya Takagi
  • Publication number: 20240120805
    Abstract: A rotating electrical machine includes a stator equipped with a stator winding, a rotor arranged to face the stator, a housing in which the stator and the rotor are disposed, and a coolant supply unit. The coolant supply unit is located vertically above the stator and the rotor in the housing in a condition where the rotating electrical machine is mounted in place. The coolant supply unit works to deliver liquid coolant into the housing. A coolant guide is provided to direct the coolant, as supplied from the coolant supply unit, into an air gap between the stator and the rotor in the housing.
    Type: Application
    Filed: December 20, 2023
    Publication date: April 11, 2024
    Applicant: DENSO CORPORATION
    Inventors: Masaki AMAKAWA, Yuichi HANDA, Keisuke KAWAI, Syuya KAMIZONO, Akira SAKAMOTO
  • Publication number: 20240101762
    Abstract: This two-component type room temperature fast-curing organopolysiloxane composition: includes a first agent containing, at a specific ratio, (A) a specific structure organopolysiloxane having a silanol group or a hydrolyzable silyl group at molecular chain ends thereof, (B) a hydrolyzable organosilane compound and/or a partially hydrolyzed condensate thereof that releases a cyclic ketone compound as a leaving group (leaving substance) by hydrolysis, and (C) a curing catalyst; and a second agent containing, in a specific amount, (A?) a specific structure organopolysiloxane having a silanol group at molecular chain ends thereof; and has more excellent hardenability than one-component type room temperature-curing organopolysiloxane compositions. This composition leaves or releases a cyclic ketone compound such as cyclobutanone or cyclopentanone as a leaving group (leaving compound) at the time of curing, and thus solves hazard or safety problems with respect to human bodies or environments.
    Type: Application
    Filed: January 18, 2022
    Publication date: March 28, 2024
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Akira UTA, Takafumi SAKAMOTO
  • Publication number: 20240095581
    Abstract: A processing method executed by a processing system that performs first inference in an edge device and performs second inference in a server device, the processing method includes determining whether or not a tendency of a target data group on which inference is performed is changed in at least one of the edge device or the server device on a basis of a variation in load or a decrease in inference accuracy in at least one of the edge device or the server device, and executing relearning of at least one of a first model that performs the first inference or a second model that performs the second inference in a case where it is determined that the tendency of the target data group is changed.
    Type: Application
    Filed: November 24, 2020
    Publication date: March 21, 2024
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Kyoku SHI, Shohei ENOMOTO, Takeharu EDA, Akira SAKAMOTO
  • Publication number: 20240003291
    Abstract: In a motor-generator configured to use no flywheel connection to an internal combustion engine, an inner stator is provided. An outer rotor is arranged to surround the inner stator. The outer rotor is connected to the internal combustion engine without a flywheel and is configured to reduce noise due to at least one of torque ripples of the internal combustion engine and rotational fluctuations of the motor-generator.
    Type: Application
    Filed: September 14, 2023
    Publication date: January 4, 2024
    Applicant: DENSO CORPORATION
    Inventors: Akira SAKAMOTO, Keisuke KAWAI, Yuichi HANDA, Syuya KAMIZONO
  • Publication number: 20230409884
    Abstract: A processing system is performed by using an edge device and a server device, wherein the edge device includes first processing circuitry configured to input divided data obtained by dividing processing data into a plurality of pieces to a corresponding first model among a plurality of first models, and cause inference in each of the first models to be executed, and output, to the server device, only the divided data for which it is determined that an inference result in the corresponding first model matches a predetermined condition among a plurality of pieces of the divided data, and the server device includes second processing circuitry configured to execute inference processing on the divided data output from the edge device by using a second model having a higher amount of computation than that of the first model.
    Type: Application
    Filed: November 24, 2020
    Publication date: December 21, 2023
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Akira SAKAMOTO, Ichiro MORINAGA, Kyoku SHI, Shohei ENOMOTO, Takeharu EDA
  • Publication number: 20230365002
    Abstract: A control apparatus includes an operation control unit; a first torque command value setting unit that sets a required torque command value; a second torque command value setting unit that sets a vehicle-stop torque command value; and a waveform setting unit that sets a torque waveform. The operation control unit controls the output torque of the rotary electric machine along the torque waveform when changing the output torque of the rotary electric machine. The waveform setting unit utilizes a first torque waveform and subsequently utilizes a second torque waveform as the torque waveform, the first torque waveform being capable of attenuating a vibration of the vehicle in a pitch direction, the second torque waveform being capable of suppressing a vibration in a power transmission member provided in a power transmission system for transmitting a torque of the rotary is electric machine to wheels.
    Type: Application
    Filed: July 20, 2023
    Publication date: November 16, 2023
    Applicant: DENSO CORPORATION
    Inventors: Haibo LIU, Keisuke KAWAI, Akira SAKAMOTO, Tatsuya TAKAGI, Shigeru KAMIO
  • Publication number: 20230366361
    Abstract: A control apparatus for a motor generator that is connected to an internal combustion engine. The control apparatus estimates an estimated torque pulsation that is an estimation value of torque pulsation of the internal combustion engine. The control apparatus controls the motor generator to reduce generated power and suppress decrease in a rotation speed of the internal combustion engine, when a negative torque that obstructs rotation of the internal combustion engine is generated in the estimated torque pulsation of the internal combustion engine.
    Type: Application
    Filed: July 26, 2023
    Publication date: November 16, 2023
    Applicant: DENSO CORPORATION
    Inventors: Akira SAKAMOTO, Keisuke KAWAI, Yuichi HANDA, Syuya KAMIZONO
  • Publication number: 20230331092
    Abstract: A control device for a vehicle includes an operation controller that controls operations of a rotating electric machine mounted to the vehicle, a first torque detector that detects a traveling torque which is a braking/driving torque to be output from the rotating electric machine when the vehicle is traveling, a second torque detector that detects a standstill torque which is a braking/driving torque to be output from the rotating electric machine upon the vehicle coming to a stop, and a waveform setter that sets a stop waveform which is a waveform indicating a time variation in the braking/driving torque output from the rotating electric machine from the traveling torque to the standstill torque. The operation controller performs a stop process that is a process to bring the vehicle to a stop while changing the braking/driving torque output from the rotating electric machine in accordance with the stop waveform.
    Type: Application
    Filed: June 23, 2023
    Publication date: October 19, 2023
    Applicant: DENSO CORPORATION
    Inventors: Haibo LIU, Keisuke KAWAI, Akira SAKAMOTO, Tatsuya TAKAGI, Shigeru KAMIO
  • Publication number: 20230224360
    Abstract: A processing system performs using an edge device and a server device, wherein the edge device includes processing circuitry configured to process processing target data and output a processing result of the processing target data, determine that the server device is to execute processing related to the processing target data when an evaluation value for evaluating which of the edge device and the server device is to process the processing target data satisfies a condition, determine that the evaluation value is included in a range for determining that processing is to be executed by the edge device when the processing result of the processing target data satisfies a predetermined evaluation, and output the processing result of the processing target data processed, and transmit data that causes the server device to execute the processing related to the processing target data when determining that the server device is to execute the processing.
    Type: Application
    Filed: June 15, 2020
    Publication date: July 13, 2023
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Masahisa KAWASHIMA, Daisuke HAMURO, Yoshinori MATSUO, Takeharu EDA, Akira SAKAMOTO, Shohei ENOMOTO, Kyoku SHI
  • Patent number: 11664405
    Abstract: Provided a semiconductor light detection element including: a semiconductor portion having a front surface including a light reception region that receives incident light and photoelectrically converting the incident light incident on the light reception region; a metal portion provided on the front surface; and a carbon nanotube film provided on the light reception region and formed by depositing a plurality of carbon nanotubes. The carbon nanotube film extends over an upper surface of the metal portion from an upper surface of the light reception region.
    Type: Grant
    Filed: October 12, 2021
    Date of Patent: May 30, 2023
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Kazuto Ofuji, Masashi Ito, Katsumi Shibayama, Akira Sakamoto
  • Publication number: 20230112076
    Abstract: An estimation unit inputs learning data to a lightweight model for outputting an estimation result in accordance with data input and acquires a first estimation result. Further, the updating unit updates a parameter of the lightweight model so that a model cascade including the lightweight model and a high-accuracy model is optimized in accordance with the first estimation result and a second estimation result obtained by inputting the learning data to the high-accuracy model, which is a model for outputting an estimation result in accordance with input data and has a lower processing speed than the first model or a higher estimation accuracy than the lightweight model.
    Type: Application
    Filed: March 6, 2020
    Publication date: April 13, 2023
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Shohei ENOMOTO, Takeharu EDA, Akira SAKAMOTO, Kyoku SHI, Yoshihiro IKEDA
  • Publication number: 20230016906
    Abstract: A thermally conductive silicone potting composition that comprises, each in a preset amount, (A) an organopolysiloxane having at least two alkenyl groups per molecule and having a viscosity of 0.01-100 Pa·s at 25° C., (B) an organopolysiloxane one end of which is blocked with an alkoxysilyl group, etc., (C) a crystalline silica having an average particle size of 0.1 ?m or more and less than 5 ?m, (D) a crystalline silica having an average particle size of 5 ?m or more and less than 100 ?m, (E) an organohydrogen siloxane having at least two SiH groups per molecule, and (F) a hydrosilylation reaction catalyst, wherein the mass ratio of (C)/(D) is from 3/1 to 1/10.
    Type: Application
    Filed: October 15, 2020
    Publication date: January 19, 2023
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Akira SAKAMOTO, Toshiyuki OZAI
  • Patent number: 11430596
    Abstract: A temperature regulating device regulates temperature of the magnetic circuit component incorporated in a power converter and including a magnetic core and a coil wound around the magnetic core and includes a cooling device that cools the magnetic circuit component, a temperature estimation device that estimates a temperature of the magnetic circuit component, a target temperature determination device that determines a target temperature of the magnetic circuit component, at which a loss of the magnetic circuit component is lowered, based on a relationship between temperature and loss of the magnetic circuit component, and a cooling suppressor that, when the temperature of the magnetic circuit component estimated by the temperature estimation device is equal to or lower than a predetermined temperature lower than the target temperature, suppresses the cooling of the magnetic circuit component by the cooling device so that the temperature of the magnetic circuit component reaches the target temperature.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: August 30, 2022
    Assignee: DENSO CORPORATION
    Inventors: Akira Sakamoto, Naoya Kondo
  • Publication number: 20220163742
    Abstract: An optical connector includes: an enclosure having a light propagation space; a glass block disposed at an end of the enclosure; an output beam fiber that: extends from an exterior of the enclosure through the light propagation space and connects to the glass block, and includes: a beam core that propagates an output laser beam; and a cladding disposed around the beam core; and an optical feedback fiber that: extends from an interior of the light propagation space to an exterior of the enclosure, and includes a feedback core to which light propagating within the light propagation space couples.
    Type: Application
    Filed: March 2, 2020
    Publication date: May 26, 2022
    Applicant: FUJIKURA LTD.
    Inventors: Akira Sakamoto, Tomohisa Endo
  • Publication number: 20220152731
    Abstract: A laser processing apparatus includes a process laser light source, a first optical system, a pulse laser light source, a second optical system, and an optical detection portion. The process laser light source generates a process laser beam having a continuous energy density during a certain period of time. The first optical system directs the process laser beam to a surface of a workpiece. The pulse laser light source generates a pulse laser beam having an energy density with a peak value that is higher than the energy density of the process laser beam. The second optical system directs the pulse laser beam to a process portion of the workpiece. The optical detection portion detects plasma light produced at the process portion of the workpiece.
    Type: Application
    Filed: March 10, 2020
    Publication date: May 19, 2022
    Applicant: FUJIKURA LTD.
    Inventors: Yuji Matsuoka, Akira Sakamoto
  • Publication number: 20220028906
    Abstract: Provided a semiconductor light detection element including: a semiconductor portion having a front surface including a light reception region that receives incident light and photoelectrically converting the incident light incident on the light reception region; a metal portion provided on the front surface; and a carbon nanotube film provided on the light reception region and formed by depositing a plurality of carbon nanotubes. The carbon nanotube film extends over an upper surface of the metal portion from an upper surface of the light reception region.
    Type: Application
    Filed: October 12, 2021
    Publication date: January 27, 2022
    Applicant: Hamamatsu Photonics K.K.
    Inventors: Kazuto Ofuji, Masashi Ito, Katsumi Shibayama, Akira Sakamoto
  • Patent number: 11205676
    Abstract: Provided a semiconductor light detection element including: a semiconductor portion having a front surface including a light reception region that receives incident light and photoelectrically converting the incident light incident on the light reception region; a metal portion provided on the front surface; and a carbon nanotube film provided on the light reception region and formed by depositing a plurality of carbon nanotubes. The carbon nanotube film extends over an upper surface of the metal portion from an upper surface of the light reception region.
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: December 21, 2021
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Kazuto Ofuji, Masashi Ito, Katsumi Shibayama, Akira Sakamoto