Patents by Inventor Frederick M. Hutto

Frederick M. Hutto 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).

  • Extended reaction acoustic liner for jet engines and the like
    Patent number: 6135238
    Abstract: An extended reaction acoustic liner for use in jet engine noise mitigation has a substantially non-porous outer layer, a honeycomb core disposed in laminar juxtaposition to the outer layer, and a porous inner layer in laminar juxtaposition to the honeycomb core such that the honeycomb core is sandwiched between the outer layer and the inner layer. The honeycomb core comprises a plurality of cell walls defining a plurality of cells. Some of the cells are in fluid communication with one another via the openings formed in the cell walls. The openings in the cell walls cause viscous acoustic losses, resulting in acoustic energy dissipation and enhanced noise attenuation.
    Type: Grant
    Filed: April 23, 1999
    Date of Patent: October 24, 2000
    Assignee: Northrop Grumman Corporation
    Inventors: Noe Arcas, Frederick M. Hutto, Charles A. Parente
  • Extended reaction acoustic liner for jet engines and the like
    Patent number: 5923003
    Abstract: An extended reaction acoustic liner for use in jet engine noise mitigation has a substantially non-porous outer layer, a honeycomb core disposed in laminar juxtaposition to the outer layer, and a porous inner layer in laminar juxtaposition to the honeycomb core such that the honeycomb core is sandwiched between the outer layer and the inner layer. The honeycomb core comprises a plurality of cell walls defining a plurality of cells. Some of the cells are in fluid communication with one another via the openings formed in the cell walls. The openings in the cell walls cause viscous acoustic losses, resulting in acoustic energy dissipation and enhanced noise attenuation.
    Type: Grant
    Filed: December 2, 1997
    Date of Patent: July 13, 1999
    Assignee: Northrop Grumman Corporation
    Inventors: Noe Arcas, Frederick M. Hutto, Charles A. Parente