Patents by Inventor John F. S. Pryke

John F. S. Pryke 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).

  • Structural element
    Patent number: 4190383
    Abstract: The invention is concerned with a method of driving a columnar pile into the ground. The pile is formed by a number of load-bearing segments each of which contributes only a part of the area of contact between the surface of the pile and the surrounding earth. The load-bearing segments at any time forming that part of the pile in the ground are advanced in turn a little way into the ground and the cycle is repeated over and over again until the pile is in its fully driven position.
    Type: Grant
    Filed: January 11, 1978
    Date of Patent: February 26, 1980
    Assignee: Pynford Limited
    Inventors: John F. S. Pryke, David S. Pryke