Patents by Inventor Robert R. Garrett

Robert R. Garrett 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).

  • Heating assembly for a heat treating furnace
    Patent number: 4135053
    Abstract: Graphite heating rods are disposed within a radiant tube which contains nitrogen under pressure to prevent oxidation of the rods. The pressure in the tube is sensed and nitrogen is admitted into or exhausted from the tube depending upon whether the pressure drops below or rises above a safe range. Only as much nitrogen is introduced into the tube as is necessary to replenish that which might be lost through normal leakage and thus only a comparatively small quantity of nitrogen is required to protect the graphite rods.
    Type: Grant
    Filed: December 23, 1977
    Date of Patent: January 16, 1979
    Assignee: Alco Standard Corporation
    Inventors: William W. Kastilahn, Robert R. Garrett, Vernon L. Park