Patents by Inventor Staffan Rydefalk

Staffan Rydefalk 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).

  • Device for separately measuring particles in a suspension
    Patent number: 4689988
    Abstract: A measuring device by which it is possible to measure individually the content of each type of substance in a suspension with at least two types of suspended substances provided the density of the substance in each type is approximately equal and the densities of the substances included in the individual types are known. The measuring device comprises a density meter (10) known per se arranged to measure the density of the suspension and the density of the liquid in which the substances are suspended in order to determine the difference in density. Moreover, the measuring device comprises an apparatus (12) known per se and intended for measurement of particle concentration, which is arranged to measure the ratio of the volume of the suspended substances to the volume of the liquid. Finally, the measuring device also comprises a calculating unit (26) electrically connected to the density meter and the apparatus for measurement of particle concentration.
    Type: Grant
    Filed: October 15, 1985
    Date of Patent: September 1, 1987
    Assignee: Svenska Traforskningsinstitutet
    Inventors: Staffan Rydefalk, Jens Einarsson