Patents by Inventor Ernst Ungricht

Ernst Ungricht 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).

  • Method and a device for precooling the helium tank of a cryostat
    Patent number: 5187938
    Abstract: In a method and a device for precooling the helium tank of a cryostat, in particular one for accommodating a superconductive magnet coil, contamination of the helium tank is avoided by the fact that helium gas is cooled down to the temperature of boiling nitrogen in a closed circuit, the helium gas is then circulated through the helium tank and thereafter cooled down again to the temperature of boiling nitrogen. The helium tank is cooled by means of the helium gas, which has a temperature of 77 K, until the tank has reached that temperature. The interior of the helium tank getting into contact exclusively with helium, the helium tank can be filled with liquid helium immediately after it has reached the precooling temperature, without the need to clean the tank first.
    Type: Grant
    Filed: May 15, 1990
    Date of Patent: February 23, 1993
    Assignee: Spectrospin AG
    Inventors: Beat Mraz, Christoph Notzli, Ernst Ungricht, Daniel Marek