Patents by Inventor Kenji Momma

Kenji Momma 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: 11888359
    Abstract: A motor-driven compressor includes a compression portion, an electric motor, an inverter, and a metal housing. The inverter includes three-phase switching elements and a plastic holder that retains the three-phase switching elements. The housing includes a thermal radiation surface. The holder includes a metal spring. The holder is fixed to the housing using two fasteners. The three-phase switching elements are laid out between the two fasteners. The switching elements at opposite ends of the three-phase switching elements are pressed toward the thermal radiation surface by only the holder. The switching element at the middle of the three-phase switching elements is pressed toward the thermal radiation surface by the holder and the spring.
    Type: Grant
    Filed: March 28, 2022
    Date of Patent: January 30, 2024
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Koki Shinohara, Junya Yano, Yusuke Kinoshita, Kenji Momma
  • Publication number: 20220320973
    Abstract: A motor-driven compressor includes a compression portion, an electric motor, an inverter, and a metal housing. The inverter includes three-phase switching elements and a plastic holder that retains the three-phase switching elements. The housing includes a thermal radiation surface. The holder includes a metal spring. The holder is fixed to the housing using two fasteners. The three-phase switching elements are laid out between the two fasteners. The switching elements at opposite ends of the three-phase switching elements are pressed toward the thermal radiation surface by only the holder. The switching element at the middle of the three-phase switching elements is pressed toward the thermal radiation surface by the holder and the spring.
    Type: Application
    Filed: March 28, 2022
    Publication date: October 6, 2022
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Koki SHINOHARA, Junya Yano, Yusuke Kinoshita, Kenji Momma
  • Patent number: 10498201
    Abstract: An electric compressor includes a housing and a cover. The housing accommodates a compression portion and an electric motor. The cover is attached to an outer surface of the housing and cooperates with the outer surface of the housing to define an accommodation space. An inverter is accommodated in the accommodation space and configured to drive the electric motor. The inverter includes a circuit board, an electrolytic capacitor, and a capacitor cover at least partly covering the electrolytic capacitor. The electrolytic capacitor includes a cylindrical main body having a first end and a second end, a lead extending from the first end of the main body and connected to the circuit board, and a pressure relief vent on the second end of the main body. The capacitor cover is interposed between the circuit board and a peripheral edge of the second end of the electrolytic capacitor.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: December 3, 2019
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Akio Fujii, Kenji Momma
  • Publication number: 20180180046
    Abstract: An electric compressor includes a compression portion, an electric motor, a drive circuit, a housing having a cylindrical shape and accommodating the compression portion and the electric motor, a cover attached to the housing and cooperating with the housing to accommodate the drive circuit, and a protector. The protector is configured to protect the cover from an external force. The protector includes a fixing portion that is fixed to the housing and a protection portion that is formed in a plate-like shape. The protection portion is disposed to face and to be spaced from the cover. The protector extends in a diametrical direction of the housing. A plurality of recesses is formed in the protection portion toward the cover such that the protection portion projects toward the cover. The recesses extend in an extending direction of the protector.
    Type: Application
    Filed: December 22, 2017
    Publication date: June 28, 2018
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Kenji MOMMA, Tatsuya KOIDE, Shingo ENAMI, Junya YANO, Yusuke KINOSHITA, Masato TSUKAHARA, Kazuhiro ONARA, Atsuhiro ISHIDA
  • Publication number: 20180183304
    Abstract: An electric compressor includes a housing and a cover. The housing accommodates a compression portion and an electric motor. The cover is attached to an outer surface of the housing and cooperates with the outer surface of the housing to define an accommodation space. An inverter is accommodated in the accommodation space and configured to drive the electric motor. The inverter includes a circuit board, an electrolytic capacitor, and a capacitor cover at least partly covering the electrolytic capacitor. The electrolytic capacitor includes a cylindrical main body having a first end and a second end, a lead extending from the first end of the main body and connected to the circuit board, and a pressure relief vent on the second end of the main body. The capacitor cover is interposed between the circuit board and a peripheral edge of the second end of the electrolytic capacitor.
    Type: Application
    Filed: December 22, 2017
    Publication date: June 28, 2018
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Akio FUJII, Kenji MOMMA
  • Publication number: 20170104392
    Abstract: The electric compressor includes a housing having electrical conductivity, an inverter, a cover having electrical conductivity, a sealing portion, and a shielding portion having electrical conductivity. The cover is attached to the housing, thereby defining an accommodating space in which the inverter is accommodated. The sealing portion has a main body portion made of resin and a metal portion having electrical conductivity. The sealing portion is provided in a gap between the housing and the cover. The shielding portion is joined to the metal portion and electrically grounded. The metal portion is provided in the accommodating space, and has an outer circumferential edge embedded in the main body portion. The shielding portion is arranged so as to face a third surface of the main body portion and so as to extend from the metal portion toward at least one of the first surface and the second surface.
    Type: Application
    Filed: October 6, 2016
    Publication date: April 13, 2017
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Takuro MIZUNO, Tatsuya KOIDE, Junya YANO, Akio FUJII, Yusuke KINOSHITA, Tetsuya YAMADA, Kenji MOMMA
  • Patent number: 5798173
    Abstract: Disclosed is an ink jet recording sheet which contains in a support and/or in a layer coated on the support a polyvinylamine copolymer obtained from a copolymer of N-vinylformamide and acrylonitrile and having a molecular weight of 50000 or more and containing 20 mol % or more of a vinylamine residue or an ink jet recording sheet comprising a support and an ink-receiving layer provided on the support wherein the composition of the ink-receiving layer contains said polyvinylamine copolymer and ultrafine inorganic pigment having a primary particle size of 100 nm or smaller.
    Type: Grant
    Filed: January 27, 1997
    Date of Patent: August 25, 1998
    Assignee: Mitsubishi Paper Mills Limited
    Inventors: Kenji Momma, Kouji Idei