Patents Assigned to Norges Skipsforskningsinstitutt
  • Method and means to prevent cavitation erosion in propeller ducts
    Patent number: 4003671
    Abstract: The invention relates to a method and a means to prevent cavitation and/or erosion in propeller ducts, and the invention is generally characterized in that air is supplied to the so-called "gap cavities" which are formed at the blade extremities or tips and between blade tips and the duct surface.
    Type: Grant
    Filed: November 26, 1974
    Date of Patent: January 18, 1977
    Assignee: Norges Skipsforskningsinstitutt
    Inventors: Erling Huse, Knut Minsaas