Patents by Inventor Duncan J. Livsey

Duncan J. Livsey 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).

  • Air cooled gas turbine aerofoil
    Patent number: 5562409
    Abstract: A hollow turbine blade has cooling air feed passages in the wall defining the central cavity. The wall surfaces of the feed passages slope away from the central cavity in a diverging manner, so as to reduce the step difference in metal thickness between the passages relative to the thickness of metal dividing each passage and the central cavity. The temperature gradient from the blade external surface and the wall surface of the central cavity is thus also reduced, avoiding thermal stresses.
    Type: Grant
    Filed: November 27, 1985
    Date of Patent: October 8, 1996
    Assignee: Rolls-Royce plc
    Inventors: Duncan J. Livsey, Martin Hamblett
  • Aerofoil section members for gas turbine engines
    Patent number: 4696621
    Abstract: A gas turbine engine nozzle guide vane has "barrelled" shape, producing an "hourglass" shaped passage between adjacent vanes. These shapes promote radial pressure gradients which reduce secondary flaws in the motive gas passages.
    Type: Grant
    Filed: April 29, 1986
    Date of Patent: September 29, 1987
    Assignee: Rolls-Royce
    Inventors: Martin Hamblett, Duncan J. Livsey