Patents by Inventor Nobuharu Takagi

Nobuharu Takagi 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).

  • Method for dry cleaning as well as a method for recovery of solvent therein
    Patent number: 5195252
    Abstract: The present invention is directed to a technique which comprises the steps of stopping the rotation of a treating drum in a deodorizing step, introducing the outside air into a treating tank through an upper opening provided in the upper portion of the treating tank or the upper portion of a recovery air duct, simultaneously exhausting a solvent gas from the treating tank through a lower opening provided in the lower portion of the treating tank or a button trap portion so slowly as not to agitate the solvent gas in the treating tank by an exhaust means connected to a solvent recovery device in the condition that the treating drum is stopped, in order to replace the solvent gas in the treating tank with the outside air, and reusing the solvent gas through the solvent recovery device once or several times. In addition, the present invention is further directed to an improvement of the above-mentioned technique.
    Type: Grant
    Filed: August 16, 1991
    Date of Patent: March 23, 1993
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Kiyomi Yamada, Haruo Hagiwara, Nobuharu Takagi, Hideo Tsukamoto, Yasuhiro Tsubaki, Toshio Hattori
  • Method and apparatus for dry cleaning as well as method and device for recovery of solvent therein
    Patent number: 5123176
    Abstract: The present invention is directed to a technique which comprises the steps of stopping the rotation of a treating drum in a deodorizing step, introducing the outside air into a treating tank through an upper opening provided in the upper portion of the treating tank or the upper portion of a recovery air duct, simultaneously exhausting a solvent gas from the treating tank through a lower opening provided in the lower portion of the treating tank or a button trap portion so slowly as not to agitate the solvent gas in the treating tank by an exhaust means connected to a solvent recovery device in the condition that the treating drum is stopped, in order to replace the solvent gas in the treating tank with the outside air, and reusing the solvent gas through the solvent recovery device once or several times. In addition, the present invention is further directed to an improvement of the above-mentioned technique.
    Type: Grant
    Filed: August 16, 1991
    Date of Patent: June 23, 1992
    Assignee: Chiyoda-Ku
    Inventors: Kiyomi Yamada, Haruo Hagiwara, Nobuharu Takagi, Hideo Tsukamoto, Yasuhiro Tsubaki, Toshio Hattori
  • Method and apparatus for dry cleaning as well as method and device for recovery of solvent therein
    Patent number: 5107605
    Abstract: The present invention is directed to a technique which comprises the steps of stopping the rotation of a treating durm in a deodorizing step, introducing the outside air into a treating tank through an upper opening provided in the upper portion of the treating tank or the upper portion of a recovery air duct, simultaneously exhausting a solvent gas from the treating tank through a lower opening provided in the lower portion of the treating tank or a button trap portion so slowly as not to agitate the solvent gas in the treating tank by an exhaust means connected to a solvent recovery device in the condition that the treating drum is stopped, in order to replace the solvent gas in the treating tank with the outside air, and reusing the solvent gas through the solvent recovery device once or several times. In addition, the present invention is further directed to an improvement of the above-mentioned technique.
    Type: Grant
    Filed: November 29, 1989
    Date of Patent: April 28, 1992
    Assignee: Chiyoda-ku
    Inventors: Kiyomi Yamada, Haruo Hagiwara, Nobuharu Takagi, Hideo Tsukamoto, Yasuhiro Tsubaki, Toshio Hattori