Patents by Inventor Alfred P. Evans

Alfred P. Evans 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).

  • Centrifugal compressor having hybrid diffuser and excess area diffusing volute
    Patent number: 4900225
    Abstract: A centrifugal compressor having a two section diffuser which has a tapered section having a constant diffusing area along its radial length, and a straight section having an increasing diffusing area along its radial length, and a diffusing volute having a throat area significantly larger than conventional designs.
    Type: Grant
    Filed: March 8, 1989
    Date of Patent: February 13, 1990
    Assignee: Union Carbide Corporation
    Inventors: James B. Wulf, Timothy D. Craig, Alfred P. Evans, Ross H. Sentz