Patents by Inventor Robert B. Abernethy

Robert B. Abernethy 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).

  • Augmentor outer segment lockout and fan upmatch
    Patent number: 4095420
    Abstract: A thrust augmented twin spool turbofan engine system to control instability at high altitude, low Mach number conditions wherein an engine electronic control monitors engine inlet temperature, engine burner pressure and Mach number, and inhibits fuel flow to the outermost augmentor segment when the engine inlet temp drops below 25.degree. F, when engine burner pressure drops below 120 psia or when the Mach number drops below 0.4. When fuel flow to the outermost augmentor is inhibited, upmatch logic modifies the variable nozzle AJ trim signal closed 8% and the power level angle trim signal up 4.degree..
    Type: Grant
    Filed: April 26, 1977
    Date of Patent: June 20, 1978
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Robert B. Abernethy, Edmond Preti, John P. Rembold