Patents Assigned to Stealth Propulsion Pty. Ltd.
  • Propeller with shrouding ring attached to blade
    Patent number: 5405243
    Abstract: A propeller having a central hub portion with multiple blades affixed to the hub portion and spaced around the circumference of the hub to extend outwardly therefrom is provided. An annular ring or shroud joins the tips of the blades, a portion of each blade tip being free of the annular ring on the trailing side of the blade to define a region permitting outward flow of liquid along the blades. By this construction, energy is directed rearwardly from the propeller and the loss of energy due to centrifugal action is reduced.
    Type: Grant
    Filed: August 12, 1993
    Date of Patent: April 11, 1995
    Assignee: Stealth Propulsion Pty. Ltd.
    Inventors: Norman R. Hurley, Russell D. Mirfin, Rhys W. Morgan, Michael B. Tunstill