Patents by Inventor Francis John Davies

Francis John Davies 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).

  • MRI magnets
    Patent number: 6211676
    Abstract: An open electromagnet including a pair of field coils which respectively comprise juxtaposed poles of the electromagnet between which an imaging volume of substantially homogeneous magnetic field is defined, toroidal shielding coil means arranged on a locus which forms a loop, so that when energized, the said shielding coil means produces a controlling magnetic field which configures a magnetic flux return path for the field coils so that the magnetic flux return path describes the said loop, and a support structure which serves rigidly to support the shielding coil means and the field coils.
    Type: Grant
    Filed: March 11, 1997
    Date of Patent: April 3, 2001
    Assignee: Oxford Magnet Technology Limited
    Inventors: Alex Francis Byrne, Nicholas David Parker, Francis John Davies
  • Short superconducting annular MRI electro-magnet
    Patent number: 5812043
    Abstract: A superconducting annular electro-magnet for MRI purposes includes an annular winding within which a generally cylindrical space is provided. The winding adjacent each end of the space is formed with a chamfer to provide flaring at each end of the space.
    Type: Grant
    Filed: April 2, 1996
    Date of Patent: September 22, 1998
    Assignee: Oxford Magnet Technology Limited
    Inventors: Russell Peter Gore, Francis John Davies