Patents by Inventor Jerry Allen Barendreght

Jerry Allen Barendreght 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).

  • Lost-foam casting apparatus for improved recycling of sprue-metal
    Patent number: 6845810
    Abstract: Apparatus for the gravity-cast, “lost-foam” casting of metal castings, including a fugitive, pyrolizable foam pattern forming a casting cavity in a bed of loose sand, and a hollow sprue for supplying melt to the casting cavity, wherein the sprue consists essentially of the same metal as is being cast. A high-temperature, porous vent is provided adjacent the discharge end of the metal sprue to expel air from the sprue that would otherwise be trapped therein.
    Type: Grant
    Filed: October 11, 2002
    Date of Patent: January 25, 2005
    Assignee: General Motors Corporation
    Inventors: June-Sang Siak, Gordon Alwin Tooley, Mark Eugene Hoover, Jerry Allen Barendreght
  • Lost-foam casting apparatus for improved recycling of sprue-metal
    Publication number: 20040069438
    Abstract: Apparatus for the gravity-cast, “lost-foam” casting of metal castings, including a fugitive, pyrolizable foam pattern forming a casting cavity in a bed of loose sand, and a hollow sprue for supplying melt to the casting cavity, wherein the sprue consists essentially of the same metal as is being cast. A high-temperature, porous vent is provided adjacent the discharge end of the metal sprue to expel air from the sprue that would otherwise be trapped therein.
    Type: Application
    Filed: October 11, 2002
    Publication date: April 15, 2004
    Inventors: June-Sang Siak, Gordon Alwin Tooley, Mark Eugene Hoover, Jerry Allen Barendreght