Patents by Inventor John E. Kuczaj

John E. Kuczaj 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).

  • High efficiency pump impeller
    Patent number: 6210116
    Abstract: An improved pump impeller using both spaced disc stack and radial vanes to establish pumping, the vanes separated to form a circumferential array of convergent spaces. The vanes may be of increasing thickness towards their outer ends to create the convergent spaces, or a cover plate may have a sloping inside surface to accomplish the space convergency.
    Type: Grant
    Filed: April 2, 1999
    Date of Patent: April 3, 2001
    Inventors: John E. Kuczaj, Dong Chul Oh