Patents by Inventor Joshua C. Liu

Joshua C. Liu 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).

  • Patent number: 6971174
    Abstract: The caster roll (10) is used in the manufacture of metal plate, strip, sheet, or foil. The caster roll (10) includes a cylindrical roll core (12) and at least one metal overlay (14) formed on the roll core (12). The at least one metal overlay (14) defines a plurality of cooling passages (34) for conducting a cooling medium through the at least one metal overlay (14) to cool the roll (10) during use. Additional metal overlays (16) may be formed on top of the at least one metal overlay. (14). The cooling passages (34) may also be formed in the roll core (12).
    Type: Grant
    Filed: November 10, 2003
    Date of Patent: December 6, 2005
    Assignee: Alcoa Inc.
    Inventors: Joshua C. Liu, Teddy R. Creech
  • Patent number: 6892793
    Abstract: The caster roll (10) is used in the manufacture of metal plate, strip, sheet, or foil. The caster roll (10) includes a cylindrical roll core (12) and at least one metal overlay (14) formed on the roll core (12). The at least one metal overlay (14) defines a plurality of cooling passages (34) for conducting a cooling medium through the at least one metal overlay (14) to cool the roll (10) during use. Additional metal overlays (16) may be formed on top of the at least one metal overlay. (14). The cooling passages (34) may also be formed in the roll core (12).
    Type: Grant
    Filed: November 10, 2003
    Date of Patent: May 17, 2005
    Assignee: Alcoa Inc.
    Inventors: Joshua C. Liu, Teddy R. Creech
  • Publication number: 20040129403
    Abstract: The caster roll (10) is used in the manufacture of metal plate, strip, sheet, or foil. The caster roll (10) includes a cylindrical roll core (12) and at least one metal overlay (14) formed on the roll core (12). The at least one metal overlay (14) defines a plurality of cooling passages (34) for conducting a cooling medium through the at least one metal overlay (14) to cool the roll (10) during use. Additional metal overlays (16) may be formed on top of the at least one metal overlay. (14). The cooling passages (34) may also be formed in the roll core (12).
    Type: Application
    Filed: November 10, 2003
    Publication date: July 8, 2004
    Inventors: Joshua C. Liu, Teddy R. Creech
  • Publication number: 20040128833
    Abstract: The caster roll (10) is used in the manufacture of metal plate, strip, sheet, or foil. The caster roll (10) includes a cylindrical roll core (12) and at least one metal overlay (14) formed on the roll core (12). The at least one metal overlay (14) defines a plurality of cooling passages (34) for conducting a cooling medium through the at least one metal overlay (14) to cool the roll (10) during use. Additional metal overlays (16) may be formed on top of the at least one metal overlay. (14). The cooling passages (34) may also be formed in the roll core (12).
    Type: Application
    Filed: November 10, 2003
    Publication date: July 8, 2004
    Inventors: Joshua C. Liu, Teddy R. Creech
  • Patent number: 5909764
    Abstract: The caster includes a pair of movable opposed belts, each of the belts having a casting surface and a pair of movable opposed dam blocks including a plurality of dam blocks having one end mounted to an orbiting support and a casting surface opposite the mounted end. The casting surfaces of the belts and the casting surfaces of the dam blocks define a casting zone for solidifying the molten metal into cast metallic product. The caster also includes cooling plates/bars for cooling the belts while the belts pass through the casting zone.
    Type: Grant
    Filed: March 6, 1998
    Date of Patent: June 8, 1999
    Assignee: Aluminum Company of America
    Inventors: Adam J. Sartschev, Joshua C. Liu
  • Patent number: 5725046
    Abstract: The caster includes a pair of movable opposed belts, each of the belts having a casting surface and a pair of movable opposed dam blocks including a plurality of dam blocks having one end mounted to an orbiting support and a casting surface opposite the mounted end. The casting surfaces of the belts and the casting surfaces of the dam blocks define a bar casting zone for solidifying the molten metal into metallic bar. The caster also includes cooling bars for cooling the belts while the belts pass through the bar casting zone.
    Type: Grant
    Filed: September 20, 1994
    Date of Patent: March 10, 1998
    Assignee: Aluminum Company of America
    Inventors: Adam J. Sartschev, Joshua C. Liu
  • Patent number: 5492166
    Abstract: The shot sleeve of the invention is used in a die casting machine and defines a bore for containing molten metal to be injected into a die. At least one passageway disposed generally parallel to the bore for containing a first fluid having a fluid temperature and a fluid flow rate is provided, whereby substantially uniform temperatures can be maintained across the width of the shot sleeve by controlling the fluid temperature of the fluid flow rate or both the fluid temperature and the fluid flow rate. A die casting machine and an associated method are also disclosed.
    Type: Grant
    Filed: December 6, 1994
    Date of Patent: February 20, 1996
    Assignee: Aluminum Company of America
    Inventors: Joshua C. Liu, Ronald E. Boylstein, George C. Full, Eric D. Arndt, James R. Fields