Patents by Inventor Liu Yumin

Liu Yumin 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).

  • Liquid quantity visual confirmation device and reservoir-forming member
    Patent number: 7063061
    Abstract: A liquid quantity visual confirmation device comprises a first reservoir-forming member, and a second reservoir-forming member forming a liquid reservoir in combination with the first reservoir-forming member. The second reservoir-forming member is at least partially transparent to allow visual confirmation of the internal liquid level from an outside thereof. The second reservoir-forming member has a liquid-feeding port for feeding the liquid into the liquid reservoir. The quantity of liquid in the liquid reservoir can be confirmed by looking at the internal liquid level in the second reservoir-forming member from the outside. It is also possible to reliably feed the liquid into the liquid reservoir from the liquid-feeding port while confirming any rising of the liquid level through the transparent portion.
    Type: Grant
    Filed: April 27, 2004
    Date of Patent: June 20, 2006
    Assignee: Kioritz Corporation
    Inventors: Yoshiaki Nagao, Toshio Takahashi, Liu Yumin, Yukio Sawadate
  • Liquid quantity visual confirmation device and reservoir-forming member
    Publication number: 20040216713
    Abstract: A liquid quantity visual confirmation device comprises a first reservoir-forming member, and a second reservoir-forming member forming a liquid reservoir in combination with the first reservoir-forming member. The second reservoir-forming member is at least partially transparent to allow visual confirmation of the internal liquid level from an outside thereof. The second reservoir-forming member has a liquid-feeding port for feeding the liquid into the liquid reservoir. The quantity of liquid in the liquid reservoir can be confirmed by looking at the internal liquid level in the second reservoir-forming member from the outside. It is also possible to reliably feed the liquid into the liquid reservoir from the liquid-feeding port while confirming any rising of the liquid level through the transparent portion.
    Type: Application
    Filed: April 27, 2004
    Publication date: November 4, 2004
    Inventors: Yoshiaki Nagao, Toshio Takahashi, Liu Yumin, Yukio Sawadate