Patents by Inventor Norman Lewis Helgeson

Norman Lewis Helgeson 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).

  • Patent number: 6497137
    Abstract: An annular after reactor is aligned axially with the direction of exhaust flow from the exhaust port of a jet engine under static test. Located near the front end of the reactor is a first set of gas injectors. A second set of gas injectors are located downstream from the first set of gas injectors within the reactor. The first set of gas injectors inject natural gas into the jet engine exhaust, while the second set of gas injectors inject ammonia into the jet engine exhaust. The natural gas when ignited raises the temperature of the jet engine exhaust which incinerates the particulate matter in the exhaust. Ammonia injected into the exhaust stream functions as a reductant to eliminate up to 90% of the NOX compounds in the exhaust stream. The reactor includes a jet engine exhaust buster assembly for substantially reducing noise generated by a jet's engine's exhaust.
    Type: Grant
    Filed: May 7, 2001
    Date of Patent: December 24, 2002
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Norman Lewis Helgeson
  • Publication number: 20010029773
    Abstract: An annular after reactor is aligned axially with the direction of exhaust flow from the exhaust port of a jet engine under static test. Located near the front end of the reactor is a first set of gas injectors. A second set of gas injectors are located downstream from the first set of gas injectors within the reactor. The first set of gas injectors inject natural gas into the jet engine exhaust, while the second set of gas injectors inject ammonia into the jet engine exhaust. The natural gas when ignited raises the temperature of the jet engine exhaust which incinerates the particulate matter in the exhaust. Ammonia injected into the exhaust stream functions as a reductant to eliminate up to 90% of the NOX compounds in the exhaust stream. The reactor includes a jet engine exhaust buster assembly for substantially reducing noise generated by a jet's engine's exhaust.
    Type: Application
    Filed: May 7, 2001
    Publication date: October 18, 2001
    Inventor: Norman Lewis Helgeson
  • Patent number: 6237395
    Abstract: An annular after reactor is aligned axially with the direction of exhaust flow from the exhaust port of jet engine undergoing static test. Located near the front end of the annular after reactor is a first set of gas injectors which extend inward into the interior of the after reactor. A second set of gas injectors which are located downstream from the first set of gas injectors also extend inward into the interior of the annular after reactor. The first set of gas injectors inject natural gas or other fuel into the exhaust flowing from the jet engine, while the second set of gas injectors inject ammonia into the exhaust from the jet engine. The natural gas when ignited substantially raises the temperature of the jet engine's exhaust which incinerates the particulate and other combustible matter in the exhaust. Ammonia when injected into the exhaust stream for the jet engine's exhaust functions as a reductant to eliminate up to 90% of the NOX compounds in the exhaust stream.
    Type: Grant
    Filed: November 8, 1999
    Date of Patent: May 29, 2001
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Norman Lewis Helgeson