Patents by Inventor John R. Kniffin

John R. Kniffin 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).

  • Method and apparatus for dissipating static charge from an abrasive tumbling operation
    Patent number: 4551949
    Abstract: A process and apparatus for dissipating static electrical charge that may build up on the small plastic parts, the tumbling medium or the tumbling chamber itself during an abrasive tumbling process and cause the parts to be repelled out of the abrasive medium. A flow of ionized gas is distributed about the tumbling chamber, discharges the parts and provides a mechanical action to return the parts to the abrasive medium. This flow of ionized gas dissipates the static charge.
    Type: Grant
    Filed: June 13, 1984
    Date of Patent: November 12, 1985
    Assignee: Iolab Corporation
    Inventors: David S. Akhavi, Richard W. Cudworth, John R. Kniffin