Patents by Inventor James K. Wilcher

James K. Wilcher 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).

  • Crescent gradient coils
    Patent number: 5886548
    Abstract: A high-conductivity ceramic coil form with an internal water jacket is used to simplify water cooling for 3-axis MRI gradient coil configurations on a single cylindrical coilform. Crescent-shaped, axially aligned coils are symmetrically employed on either side of the axial symmetry plane to increase transversely the region of field linearity. These crescent coils may be used in conjunction with Golay-type coils for improved switching efficiency. Lead-filled copper tubing may be used to reduce acoustic noise from pulsed coils in high external magnetic fields.
    Type: Grant
    Filed: February 29, 1996
    Date of Patent: March 23, 1999
    Assignee: Doty Scientific Inc.
    Inventors: F. David Doty, James K. Wilcher
  • Crescent gradient coils
    Patent number: 5554929
    Abstract: A high-conductivity ceramic coil form with an internal water jacket is used to simplify water cooling for 3-axis MRI gradient coil configurations on a single cylindrical coilform. Crescent-shaped, axially aligned coils are symmetrically employed on either side of the axial symmetry plane to increase transversely the region of field linearity. These crescent coils may be used in conjunction with Golay-type coils for improved switching efficiency. Lead-filled copper tubing may be used to reduce acoustic noise from pulsed coils in high external magnetic fields.
    Type: Grant
    Filed: March 12, 1993
    Date of Patent: September 10, 1996
    Assignee: Doty Scientific, Inc.
    Inventors: F. David Doty, James K. Wilcher