Patents by Inventor Finn Dahlgren

Finn Dahlgren 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).

  • Seal ring and use of this ring
    Patent number: 5431417
    Abstract: A sealing ring is provided for mounting in a sealing groove in each pipe-joint half of a pipe joint for high pressure use. The sealing ring comprises two joined bodies having bevelled outer sections. The sealing ring is configured such that the joined bodies are compressed toward each other upon insertion into the sealing groove of each pipe-joint half. The two joined bodies are separated by an integrated distancing piece which has an aperture that extends therethrough and is substantially perpendicular to the middle plane of the sealing ring.
    Type: Grant
    Filed: January 6, 1993
    Date of Patent: July 11, 1995
    Assignee: Steelproducts Offshore AS
    Inventor: Finn Dahlgren