Patents by Inventor Per C. Sandnaes

Per C. Sandnaes 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).

  • Offshore structure
    Patent number: 4793739
    Abstract: A compliant concrete structure which is supported by using a compliant pile system consisting of piles and pile sleeves so that the platform may yield to large oscillations when the structure is installed in a body of water. The invention comprises attaching the pile sleeve guides (6) and the pile sleeves (3) to a rotation symmetrical concrete shell which forms the basic structure. The pile sleeves are rigidly connected to the lower end portion (2) of the structure.
    Type: Grant
    Filed: June 19, 1987
    Date of Patent: December 27, 1988
    Assignee: Aker Engineering A/S
    Inventors: Alf E. Hasle, Per C. Sandnaes