Patents by Inventor Nobuo Washida

Nobuo Washida 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 an apparatus for driving sheet piles into the ground
    Patent number: 4147457
    Abstract: A method and apparatus for laying a sheet pile underground. A vertical slit is bored in the ground with an auger as a guide for a sheet pile, and the sheet pile is pushed into the earth in close vicinity to said vertical slit by a jack. The vertical slit is refilled with the removed earth by reverse operation of the auger. The auger for boring the vertical slit is elevatably mounted on the apparatus and an elevator is also mounted on a leader having a sheet pile base and a clamping device thereon for holding the sheet pile thereof between. A retaining frame elevatable under the operation of a jack is also provided on the elevator.
    Type: Grant
    Filed: June 10, 1974
    Date of Patent: April 3, 1979
    Inventor: Nobuo Washida