Patents by Inventor Atuo Hamada

Atuo Hamada 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).

  • Vacuum cleaner suction tool with partition defining air current dust pickup path
    Patent number: 6539577
    Abstract: An upright electric cleaning device includes a floor suction tool formed with a long suction opening on the bottom surface thereof. A rotating brush holding chamber holds a rotating brush that extends to this long suction opening. A suction opening leading to the main cleaning device unit is formed toward one end of the rear wall of the rotating brush holding chamber. A rib, formed on the upper section of the rotating brush holding chamber, extends along the length of the rotating brush, near the rotation path of the rotating brush. An air current path is formed to take dust drawn up by the rotating brush and stopped by the rib and suck it into the suction opening leading to the main cleaning device unit. The air current path is shaped so that its cross section is smaller at an end of the air current path remote from the suction opening than it is near the suction opening to increase flow speed at the remote end.
    Type: Grant
    Filed: March 29, 2000
    Date of Patent: April 1, 2003
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Atsushi Okuda, Atuo Hamada, Souji Sakata, Kazuyoshi Yoshimi, Kazumasa Kamatani, Nobuaki Takahashi, Syuzo Ueyama, Naoki Suetugu