Patents by Inventor Robert Morawek

Robert Morawek 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).

  • Screw driven sludge thickeners
    Patent number: 4528098
    Abstract: An apparatus for removing liquid from a solid suspension includes a screw conveyor in a housing having a suspension inlet, a liquid outlet and a separate outlet for the thickened solids. To increase the thickening effect, the faces of the screw threads are coated or treated to cause the coefficient of friction of the front, thrust faces to be higher than that of the rear faces. The coefficients can also be varied longitudinally, either continuously or in stages.
    Type: Grant
    Filed: January 26, 1984
    Date of Patent: July 9, 1985
    Assignee: Societe Anonyme D'Etudes, de Recherches et de Productions D'Agents Chimiques - E.R.P.A.C.
    Inventors: Georges M. Treyssac, Robert Morawek