Patents by Inventor Keiichi Takayama

Keiichi Takayama 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 and apparatus for removing slag
    Patent number: 4416442
    Abstract: In removing slag by vacuum suction, an upward force is always applied which is greater than the force with which a suction head is attracted downward under the influence of its own weight and that of connected parts. During normal operation, a drive force is applied through a separate drive system to balance the upward force, thus keeping the suction head in the desired position. When the drive force fails, the upward force holds the suction head in the hazard-free raised position.
    Type: Grant
    Filed: March 31, 1982
    Date of Patent: November 22, 1983
    Assignee: Nippon Steel Corporation
    Inventors: Soichi Hiroshima, Hidenao Hirasawa, Yoshinori Nakasai, Keiichi Takayama