Patents Assigned to Powerfoil Limited
  • Apparatus for sails
    Patent number: 6170421
    Abstract: A sail envelope has an internal mast or spar and one or more profiles (1) that is or are free to rotate relative to the longitudinal axis of the mast. Each profile has an outer edge in the form of a symmetrical aerofoil upon which the inner sides of the external sail surfaces bear.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: January 9, 2001
    Assignee: Powerfoil Limited
    Inventor: Gordon Ross