Patents by Inventor Masataka Fukami

Masataka Fukami 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).

  • Low load pipe for pipe jacking
    Patent number: 4966494
    Abstract: When carrying out replacement of an old main with a new one while crushing the old pipe line by a pipe jacking construction method in which the pipe line is formed by inserting pipes one by one horizontally from a launch pit without excavating the ground, application of low load is sufficient for forward movement of new main. Accordingly, a pipe for pipe jacking is able to endure to low load. Thus, there is provided an improved pipe for pipe jacking.
    Type: Grant
    Filed: November 28, 1988
    Date of Patent: October 30, 1990
    Assignee: Kurimoto Ltd.
    Inventors: Hiroyoshi Inagaski, Masataka Fukami, Kenji Kondo