Patents by Inventor Siegfried Emilius Maria de Bree

Siegfried Emilius Maria de Bree 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).

  • Pump
    Patent number: 3938908
    Abstract: A pump has an outer casing, an inner casing and a rotor within the inner casing. The inner casing is of brittle material of substantially U-shaped cross-sectional configuration with the legs of the U extending into sealed axially sliding contact each with one of a pair of covers between which the rotor is disposed. A pump is provided to introduce a fluid under pressure between the inner and outer casings thereby to place the inner casing in compression to prestress the inner casing in opposition to fluid pressure peaks within the inner casing.
    Type: Grant
    Filed: October 10, 1974
    Date of Patent: February 17, 1976
    Assignee: N.V. Industrieele Handelscombinatie Holland
    Inventor: Siegfried Emilius Maria de Bree