Patents by Inventor Raymond S. Lemmerman

Raymond S. Lemmerman 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).

  • Decanter centrifuge having discontinuous flights in the beach area
    Patent number: 5261869
    Abstract: A decanter centrifuge including a discontinuous screw conveyor having flights only within the generally cylindrical portion of the centrifuge bowl. A restricting disc is provided adjacent to the heavy phase material discharge ports such that the restriction contacts the build-up of heavy phase within the portion of the bowl where the flights are discontinuous.
    Type: Grant
    Filed: April 6, 1992
    Date of Patent: November 16, 1993
    Assignee: Alfa Laval Separation, Inc.
    Inventors: John W. Caldwell, Raymond S. Lemmerman