Patents by Inventor Masahiro Kosaka

Masahiro Kosaka 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: 20240229921
    Abstract: Provided is a unit including: a motor case configured to accommodate a motor, a gear case configured to accommodate a gear connected to the motor; and a cover having a portion sandwiched between the gear and the motor, in which the motor case communicates with the gear case via an opening of the cover, and the opening is positioned below a horizontal plane passing through an axis of the gear and orthogonal to a gravity direction.
    Type: Application
    Filed: March 18, 2022
    Publication date: July 11, 2024
    Applicant: JATCO Ltd
    Inventors: Masahiro KOSAKA, Hiroki UEHARA, Yoonseok CHOI, Doohee YOON
  • Patent number: 11990824
    Abstract: The power transmission device has the rotating electric machine, the housing that houses the stator of the rotating electric machine, and the pipe as a refrigerant liquid feeding member that has the holes. In the upper part of the housing is provided the opening that introduces oil ejected from the holes. In the lower part of the housing is provided the oil reservoir that forms an oil pool.
    Type: Grant
    Filed: February 9, 2021
    Date of Patent: May 21, 2024
    Assignee: JATCO LTD
    Inventors: Daiki Tanaka, Akira Suwabayashi, Masahiro Kosaka
  • Publication number: 20230074909
    Abstract: A device includes a rotary electric machine, a liquid supply member configured to supply liquid to the rotary electric machine, and a facing member facing the rotary electric machine in an axial direction with the liquid supply member interposed therebetween. The liquid is supplied to the liquid supply member via the facing member.
    Type: Application
    Filed: November 10, 2020
    Publication date: March 9, 2023
    Applicant: JATCO Ltd
    Inventors: Atsushi MAEDA, Ryoichi MIZOKAMI, Masaomi MORISHITA, Masahiro KOSAKA
  • Publication number: 20210328480
    Abstract: A motor oil-cooling structure for cooling, with oil, coils wound around split stator cores of a motor includes injection holes arranged in a circumferential direction of the split stator cores. The motor includes a motor case, a rotor rotatably supported by the motor case, and a stator including the split stator cores fixed to the motor case and arranged along a cylindrical outer periphery of the rotor. Each of the injection holes is structured to inject oil toward a corresponding one of coil gaps each of which is formed between two of the split stator cores adjacent to each other. Furthermore, each of the injection holes is structured to inject oil in a direction inclined by a circumferential inclination angle with respect to a direction of a motor axis, wherein oil injected to the coil gaps in the direction of the motor axis passes straight through the coil gaps.
    Type: Application
    Filed: November 8, 2019
    Publication date: October 21, 2021
    Applicant: JATCO Ltd
    Inventor: Masahiro KOSAKA
  • Publication number: 20210249934
    Abstract: The power transmission device has the rotating electric machine, the housing that houses the stator of the rotating electric machine, and the pipe as a refrigerant liquid feeding member that has the holes. In the upper part of the housing is provided the opening that introduces oil ejected from the holes. In the lower part of the housing is provided the oil reservoir that forms an oil pool.
    Type: Application
    Filed: February 9, 2021
    Publication date: August 12, 2021
    Applicant: JATCO Ltd
    Inventors: Daiki TANAKA, Akira SUWABAYASHI, Masahiro KOSAKA
  • Patent number: 9523397
    Abstract: A breather structure is provided with: a communication passage which communicates a cylinder oil chamber with the atmosphere; and a stem which is disposed in the communication passage. A stem receiving section is formed in the side of the connection passage on the side of the cylinder oil chamber, the stem receiving section allowing the stem to be disposed inside with a clearance which allows air to be discharged from the cylinder oil chamber while maintaining the hydraulic pressure within the cylinder oil chamber. An air discharge section opened to the atmosphere is formed on the side of the atmosphere in the connection passage. Also, a pit section which releases the clearance to the air discharge section and a restricting section which restricts the movement of the stem toward the air discharge section are respectively formed in the inner peripheral surface of the communication passage.
    Type: Grant
    Filed: October 2, 2013
    Date of Patent: December 20, 2016
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Hiroki Uehara, Hideki Fujisawa, Masahiro Kosaka
  • Publication number: 20150240886
    Abstract: A breather structure is provided with: a communication passage which communicates a cylinder oil chamber with the atmosphere; and a stem which is disposed in the communication passage. A stem receiving section is formed in the side of the connection passage on the side of the cylinder oil chamber, the stem receiving section allowing the stem to be disposed inside with a clearance which allows air to be discharged from the cylinder oil chamber while maintaining the hydraulic pressure within the cylinder oil chamber. An air discharge section opened to the atmosphere is formed on the side of the atmosphere in the connection passage. Also, a pit section which releases the clearance to the air discharge section and a restricting section which restricts the movement of the stem toward the air discharge section are respectively formed in the inner peripheral surface of the communication passage.
    Type: Application
    Filed: October 2, 2013
    Publication date: August 27, 2015
    Inventors: Hiroki Uehara, Hideki Fujisawa, Masahiro Kosaka
  • Publication number: 20100142541
    Abstract: A media gateway is configured to include a subscriber loop interface circuit, and TDM data-IP packet convert modules #0 and #1 having a redundant configuration and connected to an Internet protocol network via routers. The TDM data-IP packet convert modules #0 and #1 have a function of conducting communication of communication information, a synchronize signal, and IP packet data received from the Internet protocol network, between their active system and standby system. In system changeover, the TDM data-IP packet convert module #0 functioning as the active system transmits the IP packet data received from the Internet protocol network, to the block #1 functioning as the standby system, and both systems execute IP packet data communication synchronously. When IP packet data communication of the standby system is ensured, the standby system and the active system are changed over to vice versa.
    Type: Application
    Filed: November 27, 2009
    Publication date: June 10, 2010
    Inventors: Yusuke MURASE, Mitsuhiro Yamaguchi, Takeshi Kawamoto, Toshiyuki Matsuda, Yusuke Honda, Masahiro Kosaka
  • Patent number: 7026742
    Abstract: A rotary electric motor is provided which comprises an annular first rotor, an annular stator disposed concentric with and radially outside the first rotor, and an annular second rotor disposed concentric with and radially outside the stator, the stator including a stator core made up of a plurality of stator pieces that are arranged in a circular array and electrically independently from each other, coils wound around the respective stator pieces, annular first and second brackets disposed on opposite axial ends of the stator core, a fastening device passing through holes of the first and second brackets and fixedly holding the stator core between the first and second brackets, and an induction current suppressing device suppressing an induction current that is produced in response to a variation of magnetic flux of each of the coils and flows through the fastening device.
    Type: Grant
    Filed: March 28, 2003
    Date of Patent: April 11, 2006
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Shuzo Miyake, Yoshiyuki Sakashita, Masaki Nakano, Masahiro Kosaka, Minoru Arimitsu, Toshikazu Oshidari
  • Publication number: 20040135461
    Abstract: A rotary electric motor is provided which comprises an annular first rotor, an annular stator disposed concentric with and radially outside the first rotor, and an annular second rotor disposed concentric with and radially outside the stator, the stator including a stator core made up of a plurality of stator pieces that are arranged in a circular array and electrically independently from each other, coils wound around the respective stator pieces, annular first and second brackets disposed on opposite axial ends of the stator core, a fastening device passing through holes of the first and second brackets and fixedly holding the stator core between the first and second brackets, and an induction current suppressing device suppressing an induction current that is produced in response to a variation of magnetic flux of each of the coils and flows through the fastening device.
    Type: Application
    Filed: November 3, 2003
    Publication date: July 15, 2004
    Inventors: Shuzo Miyake, Yoshiyuki Sakashita, Masaki Nakano, Masahiro Kosaka, Minoru Arimitsu, Toshikazu Oshidari
  • Patent number: 4563731
    Abstract: A resonant type constant voltage supply apparatus has a LC series resonance circuit. Energy stored in both a resonance capacitor and a resonance inductor is directly transferred to the output or input terminal of the apparatus. A control transformer is provided in parallel with the resonance capacitor for deriving the energy stored in the resonance capacitor. The amount of the energy stored in the resonance capacitor can be controlled by changing the switching frequency of the apparatus or the inductance of the control transformer, so as to thereby control the amount of energy transferred to the output or input terminal of the apparatus and thereby stabilize the output voltage of the apparatus.
    Type: Grant
    Filed: January 4, 1983
    Date of Patent: January 7, 1986
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Toshiaki Sato, Mikio Maeda, Masahiro Kosaka
  • Patent number: 4424556
    Abstract: A self-oscillating DC to DC converter which includes either two or four transistors, three transformers (a converting transformer, a driving transformer and a current transformer) and an inductance.The operating frequency of the converter is fixed by the saturation time of the driving transformer. The base currents of the transistors are mainly supplied by the current transformer so as to be in proportion to the collector currents of the transistors. The operating frequency of the converter is kept constant in spite of load fluctuations. The inductance which is connected in series between a winding of the converting transformer and a winding of the driving transformer. The inductance prevents the two or four transistors from being `on` simultaneously.
    Type: Grant
    Filed: August 13, 1981
    Date of Patent: January 3, 1984
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Mikio Maeda, Masahiro Kosaka, Katsuhiko Higashiyama