Patents by Inventor John Everett Harper

John Everett Harper 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).

  • Fuel system pneumatic purge apparatus and method
    Patent number: 4041695
    Abstract: A pneumatic purge system retrofittable upon existing gas turbine engines which includes an accumulator for storing pressurized gas at the maximum pressure developed by the compressor of the turbine engine. Upon actuating a solenoid fuel shutoff valve to initiate engine shutdown, stored gas from the accumulator flows into the fuel manifold to purge fuel therefrom into the combustion chamber. Timing of the pneumatic purging sustains the combustion process to burn substantially all the purged fuel.
    Type: Grant
    Filed: November 21, 1975
    Date of Patent: August 16, 1977
    Assignee: The Garrett Corporation
    Inventors: John Everett Harper, Louis H. Kell