Patents by Inventor John D. Crecelius

John D. Crecelius 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).

  • Exhaust cooling system
    Patent number: 3981449
    Abstract: An air intake pressure unit is attached to the exhaust section of a jet ene. The unit comprises several passages which extend out beyond the end of the jet engine and through which passages engine exhaust and cooling air is passed so that cooling air passes over and mingles with exhaust gases from the engine. Construction is such that the lower static pressure formed by the exhaust gases assists in drawing in the cooling air.
    Type: Grant
    Filed: January 29, 1968
    Date of Patent: September 21, 1976
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: John F. Krey, Ephraim Regelson, John D. Crecelius