Patents by Inventor John C. Hartzell, Jr.

John C. Hartzell, Jr. 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).

  • Workpiece finishing system and method of operating same
    Patent number: 6224463
    Abstract: A preferred embodiment of a workpiece finishing system impinges a grit and fluid slurry onto a workpiece and then recycles the slurry for subsequent reuse. In another aspect of the present invention, a recovery tank is used for generally settling and concentrating the grit in the slurry, and for separating out a portion of the fluid from the grit. A further aspect of the present invention provides a venturi-type nozzle for expelling the grit and fluid onto a workpiece, wherein the nozzle has a selectively movable inlet thereby varying the slurry concentration properties of the nozzle.
    Type: Grant
    Filed: November 2, 1998
    Date of Patent: May 1, 2001
    Assignee: J.C.J. Metal Processing, Incorporated
    Inventor: John C. Hartzell, Jr.