Patents by Inventor John J. Rothschild

John J. Rothschild 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).

  • Gravity flow thermal process for reclaiming foundry sand
    Patent number: 5165888
    Abstract: A method and apparatus for thermally reclaiming used foundry sand is disclosed. The apparatus includes a vertically disposed furnace having a combustion chamber therein. A sand dispersion system supported within the combustion chamber disperses the free falling sand particles to expose the particles to a combustion supporting furnace environment. Disposed immediately below the furnace is a sand retention chamber in which the sand is accumulated. Heated air is introduced into the retention chamber to maintain the combustion supporting environment. Residual coatings remaining on the sand particles are thermally removed in the retention chamber.
    Type: Grant
    Filed: May 4, 1992
    Date of Patent: November 24, 1992
    Inventors: John J. Rothschild, James L. Donahue
  • Gravity flow thermal process for reclaiming foundry sand
    Patent number: 5110288
    Abstract: A method and apparatus for thermally reclaiming used foundry sand is disclosed. The apparatus includes a vertically disposed furnace having a combustion chamber therein. A sand dispersion system supported within the combustion chamber disperses the free falling sand particles to expose the particles to a combustion supporting furnace environment. Disposed immediately below the furnace is a sand retention chamber in which the sand is accumulated. Heated air is introduced into the retention chamber to maintain the combustion supporting environment. Residual coatings remaining on the sand particles are thermally removed in the retention chamber.
    Type: Grant
    Filed: February 8, 1990
    Date of Patent: May 5, 1992
    Inventors: John J. Rothschild, James L. Donahue