Patents by Inventor Gunnar S. K. Lundholm

Gunnar S. K. Lundholm 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).

  • Sealing rings for stirling engines
    Patent number: 4132420
    Abstract: Sealing rings located in an annular recess about a piston in a Stirling engine have a continuous sealing ring of polymeric material having an L-shaped cross-section producing an annular flange abutment. A second discontinuous polymeric ring has a surrounding resilient steel strip resting against the abutment so that internal pressure cooperates with the two rings to effect a seal.
    Type: Grant
    Filed: December 16, 1975
    Date of Patent: January 2, 1979
    Assignee: Kommanditbolaget United Stirling (Sweden) AB & Co.
    Inventor: Gunnar S. K. Lundholm