Patents by Inventor David E. Cassel

David E. Cassel 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 pump recirculation diffuser
    Patent number: 4371310
    Abstract: A recirculation diffuser for centrifugal pumps that produces a continuousrising head capacity curve and at the same time reduces levels of impeller vane-frequency sound and other high level acoustic flow tones. The conventional vane diffuser in the pump casing at the periphery of the rotary impeller is modified by separating one of the side shrouds from the diffuser vanes thereby creating a recirculation flow path around the vanes from the outside high pressure to the inside low pressure side.
    Type: Grant
    Filed: July 23, 1974
    Date of Patent: February 1, 1983
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: John W. Henry, IV, David E. Cassel