Patents by Inventor Paul M. Crafton, Jr.

Paul M. Crafton, 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).

  • Heat treatment of metal castings and integrated sand reclamation
    Patent number: 5565046
    Abstract: The method and apparatus for reclaiming substantially pure sand from a heat treating furnace; wherein a casting with sand core and/or sand mold, comprising sand bound by a combustible binder, attached thereto is introduced into the heat treating furnace; or, wherein portions of sand core and/or sand mold that are not attached to a casting are introduced into the heat treating furnace. Wherein, the reclaiming within the furnace is carried out, in part, by a fluidizer that promotes binder combustion by one or more process of agitating, heating, and oxygenating. Wherein, the characteristics of the reclaimed sand are selectively controlled by controlling the dwell time of the sand within the heat treating furnace.
    Type: Grant
    Filed: April 10, 1995
    Date of Patent: October 15, 1996
    Assignee: Consolidated Engineering Company, Inc.
    Inventors: Scott P. Crafton, Paul M. Crafton, Jr.