Patents by Inventor David O. Warren

David O. Warren 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: 7637307
    Abstract: A method and apparatus for optimizing melting of titanium for processing into ingots or end products. The apparatus provides a main hearth, a plurality of optional refining hearths, and a plurality of casting molds or direct molds whereby direct arc electrodes melt the titanium in the main hearth while plasma torches melt the titanium in the refining chambers and/or adjacent the molds. Each of the direct arc electrodes and plasma torches is extendable and retractable into the melting environment and moveable in a circular pivoting or side to side linear motion.
    Type: Grant
    Filed: September 15, 2006
    Date of Patent: December 29, 2009
    Assignee: Ajax Tocco Magnethermic Corporation
    Inventors: Edward Scott Jackson, David O. Warren
  • Publication number: 20090256292
    Abstract: A method and apparatus for optimizing melting of titanium for processing into ingots or end products. The apparatus provides a main hearth, a plurality of optional refining hearths, and a plurality of casting molds or direct molds whereby direct arc electrodes melt the titanium in the main hearth while plasma torches melt the titanium in the refining chambers and/or adjacent the molds. Each of the direct arc electrodes and plasma torches is extendable and retractable into the melting environment and moveable in a circular pivoting or side to side linear motion.
    Type: Application
    Filed: September 15, 2006
    Publication date: October 15, 2009
    Applicant: AJAX TOCCO MAGNETHERMIC CORPORATION
    Inventors: Edward Scott Jackson, David O. Warren
  • Patent number: 7503376
    Abstract: A method and apparatus for optimizing melting of titanium for processing into ingots or end products. The apparatus provides a main hearth, a plurality of optional refining hearths, and a plurality of casting molds or direct molds whereby direct arc electrodes melt the titanium in the main hearth while plasma torches melt the titanium in the refining chambers and/or adjacent the molds. Each of the direct arc electrodes and plasma torches is extendable and retractable into the melting environment and moveable in a circular pivoting or side to side linear motion.
    Type: Grant
    Filed: September 15, 2006
    Date of Patent: March 17, 2009
    Assignee: AJAX Tocco Magnethermic Corporation
    Inventors: Edward Scott Jackson, David O. Warren
  • Patent number: 7470305
    Abstract: A method and apparatus for alternating pouring into molds, casts or refining hearths from a common hearth in a furnace. The apparatus provides a main hearth, a plurality of optional refining hearths, and a plurality of casting molds or direct molds whereby the refining hearths and molds define at least two separate ingot making lines. The main hearth alternatively pours into a first ingot making line while the other line is prepared, and vice versa allowing for continuous melting.
    Type: Grant
    Filed: January 19, 2005
    Date of Patent: December 30, 2008
    Assignee: AJAX Tocco Magnethermie Corporation
    Inventors: Edward S. Jackson, David O. Warren
  • Patent number: 7137436
    Abstract: A method and apparatus for optimizing melting of titanium for processing into ingots or end products. The apparatus provides a main hearth, a plurality of optional refining hearths, and a plurality of casting molds or direct molds whereby direct arc electrodes melt the titanium in the main hearth while plasma torches melt the titanium in the refining chambers and/or adjacent the molds. Each of the direct arc electrodes and plasma torches is extendable and retractable into the melting environment and moveable in a circular pivoting or side to side linear motion.
    Type: Grant
    Filed: February 16, 2005
    Date of Patent: November 21, 2006
    Assignee: Ajax Tocco Magnethermic Corporation
    Inventors: Edward S. Jackson, David O. Warren
  • Patent number: 6981541
    Abstract: A casting furnace for use in melting and molding metals. The furnace has a mold insertion and withdrawal system attached thereto and incorporates an offset mold elevator for moving a mold up and down from a mold chamber to a furnace chamber while eliminating the need for a pit. The furnace further includes a readily removable chill plate on which the mold rides. An overhead material feed system is also provided.
    Type: Grant
    Filed: October 22, 2004
    Date of Patent: January 3, 2006
    Assignee: Lectrotherm, Inc.
    Inventor: David O. Warren
  • Patent number: 6904955
    Abstract: A method and apparatus for alternating pouring into molds, casts or refining hearths from a common hearth in a furnace. The apparatus provides a main hearth, a plurality of optional refining hearths, and a plurality of casting molds or direct molds whereby the refining hearths and molds define at least two separate ingot making lines. The main hearth alternatively pours into a first ingot making line while the other line is prepared, and vice versa allowing for continuous melting.
    Type: Grant
    Filed: September 20, 2002
    Date of Patent: June 14, 2005
    Assignee: Lectrotherm, Inc.
    Inventors: Edward Scott Jackson, David O. Warren
  • Patent number: 6868896
    Abstract: A method and apparatus for optimizing melting of titanium for processing into ingots or end products. The apparatus provides a main hearth, a plurality of optional refining hearths, and a plurality of casting molds or direct molds whereby direct arc electrodes melt the titanium in the main hearth while plasma torches melt the titanium in the refining chambers and/or adjacent the molds. Each of the direct arc electrodes and plasma torches is extendable and retractable into the melting environment and moveable in a circular pivoting or side to side linear motion.
    Type: Grant
    Filed: September 20, 2002
    Date of Patent: March 22, 2005
    Inventors: Edward Scott Jackson, David O. Warren
  • Patent number: 6827125
    Abstract: A casting furnace for use in melting and molding metals. The furnace has a mold insertion and withdrawal system attached thereto and incorporates an offset mold elevator for moving a mold up and down from a mold chamber to a furnace chamber while eliminating the need for a pit. The furnace further includes a readily removable chill plate on which the mold rides. An overhead material feed system is also provided.
    Type: Grant
    Filed: September 20, 2002
    Date of Patent: December 7, 2004
    Assignee: Lectroltherm, Inc.
    Inventor: David O. Warren
  • Patent number: 6712875
    Abstract: A method and apparatus for optimized mixing in a common hearth in a plasma furnace. The apparatus provides a main hearth, a plurality of optional refining hearths, and a plurality of casting molds or direct molds whereby the refining hearths and molds define at least two separate ingot making lines. A feed chute provides raw material to the main hearth, whereby the feed chute is moveable to optimize its position during operation of the main hearth. Most particularly, the feed chute is moveable to provide better mixing, minimize skull build-up, and optimally place it opposite the overflow in use.
    Type: Grant
    Filed: September 20, 2002
    Date of Patent: March 30, 2004
    Assignee: Lectrotherm, Inc.
    Inventors: Edward Scott Jackson, David O. Warren
  • Publication number: 20040055729
    Abstract: A casting furnace for use in melting and molding metals. The furnace has a mold insertion and withdrawal system attached thereto and incorporates an offset mold elevator for moving a mold up and down from a mold chamber to a furnace chamber while eliminating the need for a pit. The furnace further includes a readily removable chill plate on which the mold rides. An overhead material feed system is also provided.
    Type: Application
    Filed: September 20, 2002
    Publication date: March 25, 2004
    Inventor: David O. Warren
  • Publication number: 20040055733
    Abstract: A method and apparatus for optimizing melting of titanium for processing into ingots or end products. The apparatus provides a main hearth, a plurality of optional refining hearths, and a plurality of casting molds or direct molds whereby direct arc electrodes melt the titanium in the main hearth while plasma torches melt the titanium in the refining chambers and/or adjacent the molds. Each of the direct arc electrodes and plasma torches is extendable and retractable into the melting environment and moveable in a circular pivoting or side to side linear motion.
    Type: Application
    Filed: September 20, 2002
    Publication date: March 25, 2004
    Inventors: Edward S. Jackson, David O. Warren
  • Publication number: 20040056394
    Abstract: A method and apparatus for optimized mixing in a common hearth in a plasma furnace. The apparatus provides a main hearth, a plurality of optional refining hearths, and a plurality of casting molds or direct molds whereby the refining hearths and molds define at least two separate ingot making lines. A feed chute provides raw material to the main hearth, whereby the feed chute is moveable to optimize its position during operation of the main hearth. Most particularly, the feed chute is moveable to provide better mixing, minimize skull build-up, and optimally place it opposite the overflow in use.
    Type: Application
    Filed: September 20, 2002
    Publication date: March 25, 2004
    Inventors: Edward S. Jackson, David O. Warren
  • Publication number: 20040055730
    Abstract: A method and apparatus for alternating pouring into molds, casts or refining hearths from a common hearth in a furnace. The apparatus provides a main hearth, a plurality of optional refining hearths, and a plurality of casting molds or direct molds whereby the refining hearths and molds define at least two separate ingot making lines. The main hearth alternatively pours into a first ingot making line while the other line is prepared, and vice versa allowing for continuous melting.
    Type: Application
    Filed: September 20, 2002
    Publication date: March 25, 2004
    Inventors: Edward S. Jackson, David O. Warren
  • Patent number: 5813642
    Abstract: A support bracket adapted to support a plaque above a tombstone. The bracket having a slot across its uppermost portion for receiving the plaque and a screw extending perpendicular through the slot for securing the plaque. The bracket further having downwardly extending flanges adapted to contact the sides of the tombstone, with at least one of the flanges having a recess for receiving a screw for securing the bracket to the sides of the tombstone.
    Type: Grant
    Filed: September 19, 1996
    Date of Patent: September 29, 1998
    Inventor: David O. Warren
  • Patent number: D395124
    Type: Grant
    Filed: September 19, 1996
    Date of Patent: June 9, 1998
    Inventor: David O. Warren