Patents by Inventor Donald Schofield

Donald Schofield 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).

  • Shelling apparatus and methods for investment casting
    Publication number: 20050274482
    Abstract: An apparatus for shelling an investment casting pattern has a tank containing a coating material. There are means for holding the pattern immersed in the coating material. There may be means for vibrating the pattern during immersion of the pattern and a vacuum source coupled to the tank to withdraw air from at least one headspace of the tank.
    Type: Application
    Filed: August 17, 2005
    Publication date: December 15, 2005
    Inventors: John Marcin, Stephen Murray, Carl Verner, Maria Herring, Lea Kennard, Donald Schofield, Richard Ritchie, Reade Clemens, Michael Turkington, Delwyn Norton
  • Shelling apparatus and methods for investment casting
    Publication number: 20050121167
    Abstract: An apparatus for shelling an investment casting pattern has a tank containing a coating material. There are means for holding the pattern immersed in the coating material. There may be means for vibrating the pattern during immersion of the pattern and a vacuum source coupled to the tank to withdraw air from at least one headspace of the tank.
    Type: Application
    Filed: December 5, 2003
    Publication date: June 9, 2005
    Inventors: John Marcin, Stephen Murray, Carl Verner, Maria Herring, Lea Kennard, Donald Schofield, Richard Ritchie, Reade Clemens, Michael Turkington, Delwyn Norton