Patents by Inventor Masahiro Nagaishi

Masahiro Nagaishi 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).

  • Drilling head, method of soil improvement work and apparatus thereof
    Patent number: 7651301
    Abstract: A method of soil improvement work drills the ground with a drilling head arranged at a lower end of a rotary shaft and sends the rotary shaft into the ground. The method mixes pressurized water with compressed air on the ground, to prepare a fluid mixture, feeds the fluid mixture through a feed path arranged along the rotary shaft into an ejector arranged on the drilling head, and ejects the fluid mixture from the ejector toward the ground to drill. An envelope defined by a front end of the drilling head has a conical shape.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: January 26, 2010
    Assignee: Fudo Tetra Corporation
    Inventors: Toshihisa Taniguchi, Masahiro Nagaishi, Hiroshi Nitao, Makoto Otsuka
  • DRILLING HEAD, METHOD OF SOIL IMPROVEMENT WORK AND APPARATUS THEREOF
    Publication number: 20080060851
    Abstract: A method of soil improvement work drills the ground with a drilling head arranged at a lower end of a rotary shaft and sends the rotary shaft into the ground. The method mixes pressurized water with compressed air on the ground, to prepare a fluid mixture, feeds the fluid mixture through a feed path arranged along the rotary shaft into an ejector arranged on the drilling head, and ejects the fluid mixture from the ejector toward the ground to drill. An envelope defined by a front end of the drilling head has a conical shape.
    Type: Application
    Filed: December 21, 2006
    Publication date: March 13, 2008
    Applicant: FUDO TETRA CORPORATION
    Inventors: Toshihisa TANIGUCHI, Masahiro NAGAISHI, Hiroshi NITAO, Makoto OTSUKA