Patents by Inventor Kari J. Lievonen

Kari J. Lievonen 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).

  • Patent number: 4355919
    Abstract: A pipe connection, and method for forming said connection, wherein one pipe is connected at an angle to the side of a second pipe, said connection forming a structural joint and not a flow passage; a first pipe has a cylindrical opening formed in its side while a second pipe has one end contoured to fit against the side of said first pipe over said opening; said second pipe has a locking member fixed to the interior thereof with a projection which fits into the opening in said first pipe with said projection having a stem extending therefrom having an enlarged head which projects into the interior of said first pipe; a holding clip is positioned between the underside of said enlarged head and the inner surface of said first pipe forcing the contoured end of said second pipe against the side of said first pipe.
    Type: Grant
    Filed: October 1, 1980
    Date of Patent: October 26, 1982
    Inventor: Kari J. Lievonen
  • Patent number: D308098
    Type: Grant
    Filed: April 30, 1987
    Date of Patent: May 22, 1990
    Inventors: Arvo E. Lievonen, Kari J. Lievonen