Patents by Inventor Robert G. Marshall

Robert G. Marshall 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).

  • Variable geometry rotors for turbo machines
    Patent number: 5236307
    Abstract: There is provided a rotor arrangement comprising primary blades 16 mounted on a support disc 15 and secondary blades 18 mounted on a support disc 17. The secondary blades are disposed between respective primary blades with some axial overlap. The set of secondary blades is movable relative to the set of primary blades so that each secondary blade can be moved between end positions abutting the associated pair of primary blades.
    Type: Grant
    Filed: July 13, 1992
    Date of Patent: August 17, 1993
    Assignee: Rolls-Royce plc
    Inventors: Dik H. Ng, Robert G. Marshall