Patents by Inventor Robert Anthony Thomas, deceased

Robert Anthony Thomas, deceased 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).

  • Pressurized squeeze casting apparatus and method and low pressure furnace for use therewith
    Patent number: 5906235
    Abstract: A pressurized squeeze casting apparatus and method for casting articles includes densifying means for mechanically applying force to a die assembly to compress and densify the molten metal material into a solid article having a near net shape. A shutoff member is provided to seal the interior cavity at the juncture of the runner and the cavity after the cavity is filled with molten metallic material and prior to densification. A low pressure furnace provides a supply of molten metallic material. The outlet from the furnace is biased into engagement with the runner by the gas pressure in the low pressure furnace to ensure a fluid tight connection between the furnace and the runner.
    Type: Grant
    Filed: March 31, 1997
    Date of Patent: May 25, 1999
    Inventors: Robert Anthony Thomas, deceased, by Margaretanne Thomas, legal representative, James B. Thomas, Roger Hale
  • Pressurized squeeze casting apparatus and method and low pressure furnace for use therewith
    Patent number: 5887642
    Abstract: A pressurized squeeze casting apparatus and method for casting articles includes densifying means for mechanically applying force to a die assembly to compress and densify the molten metal material into a solid article having a near net shape. A shutoff member is provided to seal the interior cavity at the juncture of the runner and the cavity after the cavity is filled with molten metallic material and prior to densification. A low pressure furnace provides a supply of molten metallic material. The outlet from the furnace is biased into engagement with the runner by the gas pressure in the low pressure furnace to ensure a fluid tight connection between the furnace and the runner.
    Type: Grant
    Filed: July 14, 1998
    Date of Patent: March 30, 1999
    Inventors: Robert Anthony Thomas, deceased, by James B. Thomas, executor, Roger Hale