Patents by Inventor Mark Timothy Mitchell

Mark Timothy Mitchell 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).

  • Cooling airflow modulation
    Patent number: 8070436
    Abstract: A gas turbine engine airfoil (22) has a wall (42) provided with a cooling effusion hole (40) therein to facilitate film cooling of the external surface (52) of the wall (42). A member (46) attached to the internal surface (48) of the airfoil wall (42) is provided with an aperture (44) which at least partially overlaps the cooling effusion hole (40). The airfoil wall (42) and member (46) are formed from materials having different coefficients of thermal expansion and are mounted such that over a temperature range, the aperture (44) and cooling effusion hole (40) interact to a greater or lesser extent to modulate the flow of cooling air therethrough.
    Type: Grant
    Filed: January 2, 2009
    Date of Patent: December 6, 2011
    Assignee: Rolls-Royce PLC
    Inventor: Mark Timothy Mitchell