Patents by Inventor Tommy J. Derrington

Tommy J. Derrington 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).

  • Hydrocyclone having dewatering tube
    Patent number: 4786412
    Abstract: A hydrocyclone has a lower conical separating chamber with a lower outlet and a tube in the outlet projecting into the concial chamber to reduce the water content of the materials discharged from the lower outlet.
    Type: Grant
    Filed: November 23, 1987
    Date of Patent: November 22, 1988
    Assignee: Eagle-Picher Industries, Inc.
    Inventors: Roy D. Lister, Tommy J. Derrington
  • Method for removing gun barrel evacuator
    Patent number: 4554722
    Abstract: A resilient plastic ring having a sector removed. The ring is adapted to be snapped transversely onto a gun barrel adjacent a bore evacuator. When in place, the ring can be struck with a hammer to cause the evacuator to slide axially off the gun barrel.
    Type: Grant
    Filed: February 3, 1983
    Date of Patent: November 26, 1985
    Assignee: Eagle-Picher Industries, Inc.
    Inventor: Tommy J. Derrington