Patents by Inventor Willem van Haeringen

Willem van Haeringen 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).

  • .sup.3 He-.sup.4 He Dilution refrigerator
    Patent number: 4297856
    Abstract: A .sup.3 He-.sup.4 He dilution refrigerator comprises an upper mixing chamber for mixing liquid concentrated .sup.3 He and superfluid .sup.4 He, and a lower segregating chamber for separating concentrated .sup.3 He and superfluid .sup.4 He. An auxiliary chamber is situated between the mixing chamber and the segregating chamber. A connecting duct extends between the segregating chamber and the auxiliary chamber. The upper part of the auxiliary chamber communicates with the upper part of the mixing chamber for flow of concentrated .sup.3 He into the latter; and the lower part of the auxiliary chamber communicates with the lower part of the mixing chamber for flow of dilute .sup.3 He to the lower part of the auxiliary chamber.
    Type: Grant
    Filed: March 10, 1980
    Date of Patent: November 3, 1981
    Assignee: U.S. Philips Corporation
    Inventors: Frans A. Staas, Willem van Haeringen, Adrianus P. Severijns