Patents by Inventor Roger D. Tull

Roger D. Tull 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).

  • Diagnostic system for determining engine start bleed strap failure
    Patent number: 4894782
    Abstract: A novel diagnostic system used in conjunction with an engine electronic control automatically determines start bleed strap failure in a gas turbine engine. The system indirectly determines engine start bleed strap failure without a separate sensor. A normal turbine temperature to engine inlet temperature ratio and burner pressure to engine inlet pressure ratio relationship is established. A failed engine start bleed strap corresponds to a high turbine temperature to engine inlet temperature ratio at a given burner pressure to engine inlet pressure ratio.
    Type: Grant
    Filed: June 2, 1989
    Date of Patent: January 16, 1990
    Assignee: United Technologies Corporation
    Inventors: Joseph F. Alcock, Roger D. Tull