Patents by Inventor Derwent G. Stewart

Derwent G. Stewart 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).

  • Thrust augmentor
    Patent number: 4592202
    Abstract: Thrust augmentation apparatus for a propulsive gas jet 11 including: an outer augmentor housing 15 and an inner augmentor housing 21 arranged coaxially with the jet 11. A minor air flow 25 is drawn into the inner passage 24 by an ejector effect, that flow 25 driving turbine vanes 28 projecting inwardly but terminating short of the jet 11. The vanes 28 transmit drive to fan blades 13 in the outer housing 15 to promote a thrust augmenting air flow 14. As an alternative to turbine vanes 28, gas scoops 32 may be used to develop the energy for creating the air flow 14.
    Type: Grant
    Filed: February 14, 1984
    Date of Patent: June 3, 1986
    Assignee: Commonwealth of Australia
    Inventors: Derwent G. Stewart, Samuel A. Fisher