Patents by Inventor Robert K. Wiedenmann

Robert K. Wiedenmann 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).

  • Vortex mixer drive
    Patent number: 4895453
    Abstract: An automatic vortexing drive is described in which a rotatable coupling has a cuplike recess positioned off of and opening radially outward from the axis of rotation of the coupling. The coupling is positioned to intercept the lower and reaction vessels in the recess. Selective rotation of the coupling permits the vessels to pass the coupling or be engaged by the coupling and nutated.
    Type: Grant
    Filed: August 24, 1988
    Date of Patent: January 23, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: William J. Devlin, Carl F. Morin, Robert K. Wiedenmann