Patents by Inventor Donald Keith Avera

Donald Keith Avera 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).

  • Compression driver phase plug
    Patent number: 6064745
    Abstract: A phase plug for a horn loaded speaker has a frustro-conical body with a spherical entrance end and a planer outlet end. The plug is formed with radial channels. The entrance of the phase plug and the speaker diaphragm are conformal and the channels have generally equal aperture area from the entrance to the outlet, or slightly increasing aperture areas so as to minimize diffraction The truncation surface is defined by the intersection of the sidewalls of the conical body and the cone angle of the horn.
    Type: Grant
    Filed: June 4, 1998
    Date of Patent: May 16, 2000
    Assignee: Peavey Electronics Corporation
    Inventor: Donald Keith Avera