Patents by Inventor Tomohiro Tokunaga

Tomohiro Tokunaga 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: 11518672
    Abstract: A fluid pressure feeding device includes: a follower plate that is inserted into a tank, that applies a pressing force to a fluid, and that has an opening for pumping up the fluid from an inside of the tank; a pump having a primer plate configured to exhibit reciprocating movement to pump up the fluid in the tank into a pump internal space; and a position control unit configured to control a position of the primer plate within a range of the reciprocating movement. An outer shape of the primer plate substantially matches a shape of the opening of the follower plate, and the position control unit is configured such that the primer plate is positioned in the opening of the follower plate when the follower plate is taken out from the tank.
    Type: Grant
    Filed: December 30, 2020
    Date of Patent: December 6, 2022
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, PYLES JAPAN Co., LTD., TOYOTA PRODUCTION ENGINEERING
    Inventors: Masahiro Tasaka, Kunimi Abiru, Shoji Suzuki, Takatoshi Urashi, Katsura Hara, Tomohiro Tokunaga, Naoki Yamaguchi
  • Publication number: 20210238024
    Abstract: A fluid pressure feeding device includes: a follower plate that is inserted into a tank, that applies a pressing force to a fluid, and that has an opening for pumping up the fluid from an inside of the tank; a pump having a primer plate configured to exhibit reciprocating movement to pump up the fluid in the tank into a pump internal space; and a position control unit configured to control a position of the primer plate within a range of the reciprocating movement. An outer shape of the primer plate substantially matches a shape of the opening of the follower plate, and the position control unit is configured such that the primer plate is positioned in the opening of the follower plate when the follower plate is taken out from the tank.
    Type: Application
    Filed: December 30, 2020
    Publication date: August 5, 2021
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, PYLES JAPAN Co., LTD., TOYOTA PRODUCTION ENGINEERING
    Inventors: Masahiro TASAKA, Kunimi ABIRU, Shoji SUZUKI, Takatoshi URASHI, Katsura HARA, Tomohiro TOKUNAGA, Naoki YAMAGUCHI
  • Patent number: 5711232
    Abstract: A Stirling engine has an external combustion chamber for burning a kerosene and transferring a high temperature therein to working fluid in heater tubes. In the case of the present invention, the external combustion chamber is connected to a furnace for burning industrial waste materials such as plastic materials or rubber materials so that the high temperature above 900.degree. C. is able to be supplied to the combustion chamber. This serves in raising an output power of the Stirling engine. A conduit for connecting the furnace with the combustion chamber is proveded with a dumper capable of interrupting a flow of the high temperature combustion gases toward the combustion chamber of the Stirling engine.
    Type: Grant
    Filed: June 30, 1994
    Date of Patent: January 27, 1998
    Assignees: Aisin Seiki Kabushiki Kaisha, Kabushiki Kaisha Semitsu
    Inventors: Akira Yamaguro, Naoki Minamoto, Tomohiro Tokunaga, Akio Otsuka