Patents by Inventor Michael O. Hatfield

Michael O. Hatfield 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: 6686818
    Abstract: A tuner (10) for a reverberation chamber is provided comprising a plurality of electrically conductive surfaces (12) attached to each other in a Z-fold configuration. Each lateral edge (15) of the tuner is contacted with a generally planar, laterally positioned substrate (16) which prevents lateral extension or medial compression of the Z-fold. Optionally, end substrates (18) are attached to each of the two leading edges (17). Also, a device minimizes electromagnetic radiation leakage along a shaft including: a bearing housing; a plurality of thrust bearings contacting the bearing housing and axially juxtaposed along the shaft so that at least two thrust bearings oppose each other; a radial bearing intermediate each thrust bearing; and a provision for adjustably moving the thrust bearings toward each other so as to compress the thrust bearings against the bearing housing.
    Type: Grant
    Filed: February 19, 2002
    Date of Patent: February 3, 2004
    Assignee: The Curran Company
    Inventors: Joseph Weibler, Matthew Squire, Stan Zielinski, Dale Svetanoff, Michael Slocum, Michael O. Hatfield
  • Patent number: H821
    Abstract: A method of determining radiated shielding effectiveness for a piece of epment under test (EUT) utilizing a mode-stirred chamber. Radio frequency (rf) fields are transmitted from a broad band noise source into the mode-stirred chamber. A first paddle wheel tuner uniformly distributes the rf fields throughout the chamber. The EUT is housed in the chamber such that it is exposed to the transmitted rf fields. A second paddle wheel tuner and receiving antenna are mounted within the EUT to isolate them from the transmitted rf fields. The second paddle wheel uniformly distributes any rf fields that leak into the EUT and the receiving antenna is used to detect the rf leakage.
    Type: Grant
    Filed: March 27, 1990
    Date of Patent: September 4, 1990
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Michael O. Hatfield, Lawrence C. Halley, Jr.