Patents by Inventor Mark R. Thatcher

Mark R. Thatcher 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).

  • Rotor assembly
    Patent number: 4854821
    Abstract: A rotor assembly for use in a rotodynamic machine comprises a rotor disc (10) with a plurality of blades (14) attached to its outer rim (12) and a seal plate (22) for substantially preventing the escape of blade cooling air. The rotor disc (10) is provided with a plurality of hooked restraining members (30) each including a radially inward directed abutment face (32) which in use restrain the seal plate from moving axially and from moving radially outward under centrifugal force by abutment with the seal plate. In this way the blades (14) are not subjected to additional loading by the seal plate (22).
    Type: Grant
    Filed: February 25, 1988
    Date of Patent: August 8, 1989
    Assignee: Rolls-Royce plc
    Inventors: John D. Kernon, Kenneth R. Langley, Mark R. Thatcher