Patents by Inventor Akira Yonei

Akira Yonei 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).

  • Drainage pump
    Patent number: 5252025
    Abstract: A drainage pump (10) in which the portion near the entrance of the impeller (12) in the suction tube (11) is open to the set lowest suction water level (L.W.L.) through an air intake pipe (15), so that air is introduced into the portion near the entrance of the impeller (12) when the suction water level (W.L.) is lower than the preset lowest suction water level. An air intake hole (14) may also be provided through the water intake suction tube (11) near the impeller.
    Type: Grant
    Filed: October 17, 1991
    Date of Patent: October 12, 1993
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Nobuo Kida, Kenji Kiyota, Akira Yonei, Hiroshi Oya