Patents by Inventor Herbert Franz Demel

Herbert Franz Demel 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).

  • Methods and apparatus for supplying oil to bearing assemblies
    Patent number: 6409464
    Abstract: A gas turbine engine includes a lubrication system that supplies oil through a plurality of circumferential grooves and radial grooves to a bearing assembly. The grooves extend within an inner surface of a first rotor shaft sized to fit in an interference fit around a main rotor shaft. The circumferential grooves are spaced circumferentially around the inner surface of the first rotor shaft and are substantially perpendicular to the radial grooves. The radial grooves are in flow communication with a plurality of scoops extending between an outer and inner surface of the first rotor shaft, and with the bearing assembly.
    Type: Grant
    Filed: June 30, 2000
    Date of Patent: June 25, 2002
    Assignee: General Electric Company
    Inventors: Kenneth Lee Fisher, Herbert Franz Demel, Rodney Hazeley