Patents by Inventor Rodney S. Haaland

Rodney S. Haaland 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).

  • Impregnated ceramic core and method of making
    Publication number: 20040166349
    Abstract: An impregnated fired, porous ceramic core for use in an investment casting shell mold in the casting of molten metals and alloys is strengthened by impregnating the core with an aqueous emulsion of water-insoluble polymer followed by drying to remove the water.
    Type: Application
    Filed: February 24, 2004
    Publication date: August 26, 2004
    Applicant: Howmet Research Corporation
    Inventor: Rodney S. Haaland
  • Impregnated ceramic core and method of making
    Patent number: 6720028
    Abstract: An impregnated fired, porous ceramic core for use in an investment casting shell mold in the casting of molten metals and alloys is strengthened by impregnating the core with an aqueous emulsion of water-insoluble polymer followed by drying to remove the water.
    Type: Grant
    Filed: March 27, 2001
    Date of Patent: April 13, 2004
    Assignee: Howmet Research Corporation
    Inventor: Rodney S. Haaland
  • Ceramic casting cores with controlled surface texture
    Patent number: 6588484
    Abstract: A method of making a ceramic core is provided wherein the ceramic core is grit blasted using abrasive grit media particulates directed at the core through a preformed apertured mask or pattern to impart a controlled pattern of surface concavities to the core surface by impingement of the abrasive grit media thereon. Another method of making a ceramic casting core is provided wherein the ceramic core is formed in a molding die having a fugitive textured mask or a permanent textured insert positioned on the die surface to impart a controlled surface texture or roughness to the core surfaces.
    Type: Grant
    Filed: June 20, 2000
    Date of Patent: July 8, 2003
    Assignee: Howmet Research Corporation
    Inventors: Ken Ervin Fosaaen, Rodney S. Haaland
  • Ceramic core and method of making
    Patent number: 6578623
    Abstract: Method of making a ceramic core for casting an industrial gas turbine engine airfoil having a large airfoil pitch by forming a precursor core (chill) of smaller dimensions than the final desired ceramic core, firing the chill, applying a thin ceramic skin to the fired chill to form a coated core of final dimensions, and then firing the coated core. Firing of the thin ceramic skin reduces airfoil pitch shrinkage resulting from the latter firing operation to reduce overall core dimensional tolerance variations.
    Type: Grant
    Filed: October 1, 2001
    Date of Patent: June 17, 2003
    Assignee: Howmet Research Corporation
    Inventors: Ronald J. Keller, Rodney S. Haaland, Julie A. Faison
  • Impregnated alumina-based core and method
    Patent number: 6494250
    Abstract: An impregnated fired porous alumina-based ceramic core for use in an investment shell mold in the casting of molten metals and alloys wherein the core is impregnated with yttria to improve core creep resistance at elevated casting temperatures and times.
    Type: Grant
    Filed: August 8, 2001
    Date of Patent: December 17, 2002
    Assignee: Howmet Research Corporation
    Inventors: Gregory R. Frank, Ronald J. Keller, Rodney S. Haaland, Charles F. Caccavale, Alfred P. Kaulius, Jr.
  • IMPREGNATED ALUMINA-BASED CORE AND METHOD
    Publication number: 20020185243
    Abstract: An impregnated fired porous alumina-based ceramic core for use in an investment shell mold in the casting of molten metals and alloys wherein the core is impregnated with yttria to improve core creep resistance at elevated casting temperatures and times.
    Type: Application
    Filed: August 8, 2001
    Publication date: December 12, 2002
    Inventors: Gregory R. Frank, Ronald J. Keller, Rodney S. Haaland, Charles F. Caccavale, Alfred P. Kaulius
  • Ceramic core and method of making
    Publication number: 20020117601
    Abstract: Method of making a ceramic core for casting an industrial gas turbine engine airfoil having a large airfoil pitch by forming a precursor core (chill) of smaller dimensions than the final desired ceramic core, firing the chill, applying a thin ceramic skin to the fired chill to form a coated core of final dimensions, and then firing the coated core. Firing of the thin ceramic skin reduces airfoil pitch shrinkage resulting from the latter firing operation to reduce overall core dimensional tolerance variations.
    Type: Application
    Filed: October 1, 2001
    Publication date: August 29, 2002
    Applicant: Howmet Research Corporation
    Inventors: Ronald J. Keller, Rodney S. Haaland, Julie A. Faison
  • Ceramic core and method of making
    Patent number: 6315941
    Abstract: Method of making a ceramic core for casting an industrial gas turbine engine airfoil having a large airfoil pitch by forming a precursor core (chill) of smaller dimensions than the final desired ceramic core, firing the chill, applying a thin ceramic skin to the fired chill to form a coated core of final dimensions, and then firing the coated core. Firing of the thin ceramic skin reduces airfoil pitch shrinkage resulting from the latter firing operation to reduce overall core dimensional tolerance variations.
    Type: Grant
    Filed: June 24, 1999
    Date of Patent: November 13, 2001
    Assignee: Howmet Research Corporation
    Inventors: Ronald J. Keller, Rodney S. Haaland, Julie A. Faison