Patents by Inventor Thoru Tamura

Thoru Tamura 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 of forming sand piles for improving a soft ground
    Patent number: 4487524
    Abstract: A method for uniformly improving a soft ground is proposed. It includes the steps of driving a pipe into the ground, putting sand thereinto and pulling up the pipe gradually while discharging and compacting the sand. In forming the sand piles, the diameter and/or strength of the sand piles are changed according to the soil nature of the ground to be improved to improve the ground uniformly.
    Type: Grant
    Filed: September 17, 1982
    Date of Patent: December 11, 1984
    Assignee: Fudo Construction Co., Ltd.
    Inventors: Masaru Shono, Takahiro Kawakami, Toshiyuki Matsumoto, Thoru Tamura, Hideki Matsumoto