Patents by Inventor David Jonathan Chalk

David Jonathan Chalk 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).

  • Superconducting magnet split cryostat cryogen ride-through reserve
    Patent number: 6011456
    Abstract: An open architecture recondensing superconducting magnet utilizing an upper and lower cryogen vessel connected by a passageway which extends above the bottom of upper cryogen vessel to discontinue the flow of liquid cryogen through the passageway to reserve liquid cryogen in the upper cryogen vessel when the cryogen level falls to provide an increased ride-through period in the event of a depleting liquid cryogen supply due to failure of the cryogen gas recondenser. A signal is provided to indicate the need to correct the failure.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: January 4, 2000
    Inventors: Phillip W. Eckels, David Jonathan Chalk, Thomas Joseph, Joseph Anthony Schillinger