Patents by Inventor Walter Albert Zimmermann

Walter Albert Zimmermann 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).

  • Double-sided RF shield for RF coil contained within gradient coils used in high speed NMR imaging
    Patent number: 5680046
    Abstract: A magnetic resonance system includes a cylindrical shield disposed between a quadrature RF coil and surrounding gradient coils. The shield includes a pair of copper sheets separated by an insulating dielectric sheet. A pattern formed by cuts in one copper sheet aligns with the currents induced in the shield by one of the RF quadrature fields, and a pattern formed by cuts in the other copper shield aligns with the other RF quadrature field. The copper sheets are shorted together to prevent voltage breakdowns and short cuts are made in each to prevent gradient induced eddy currents.
    Type: Grant
    Filed: August 5, 1994
    Date of Patent: October 21, 1997
    Assignee: General Electric Company
    Inventors: Perry Scott Frederick, Walter Albert Zimmermann, Peter Bernard Roemer