Patents by Inventor Craig B. Dallam
Craig B. Dallam 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).
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Patent number: 9579751Abstract: In a stick electrode for electric arc welding having a center alloy wire and an outer cellulose coating which coating includes powdered fluxing agents, alloy powder, cellulose powder and a binder. The improvement involves forming the binder as a solution of sodium silicate and 61-78 percent by weight of the binder. The binder comprises 25-35% of the coating to produce at least about 4% by weight of water in the electrode. Furthermore, the fluxing agent is titanium dioxide with a percentage greater than 12 percent of the coating.Type: GrantFiled: February 21, 2006Date of Patent: February 28, 2017Assignee: LINCOLN GLOBAL, INC.Inventors: Randall M. Burt, Jon P. Chiappone, Craig B. Dallam, Robert J. Weaver
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Patent number: 9095919Abstract: A stick electrode for depositing an high strength weld metal bead on a workpiece where the yield strength of the weld metal is between 85 ksi and 125 ksi irrespective of the cooling rate. The electrode deposits weld metal having 0.80-1.85% by weight manganese, 0.25-0.50% by weight molybdenum, 1.25-2.50% by weight nickel, and less than 0.07% by weight carbon, wherein the ratios of the carbon, manganese and molybdenum are adjusted to provide a carbon equivalent in deposited weld metal in the range of 0.17 to 0.30 and preferably less than 0.22.Type: GrantFiled: February 21, 2006Date of Patent: August 4, 2015Assignee: Lincoln Global, Inc.Inventors: Randall M. Burt, Jon P. Chiappone, Craig B. Dallam, Robert J. Weaver
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Patent number: 8927904Abstract: A system and method of rating the arc maintainability of an electric arc welding stick electrode by creating an arc between the electrode and a workpiece; moving the electrode along the workpiece while maintaining the arc; decreasing either the current or the voltage until a point is reached where the arc is extinguished; determining the open circuit voltage at the point; and, rating the electrode based upon at least the open circuit voltage point.Type: GrantFiled: March 28, 2013Date of Patent: January 6, 2015Assignee: Lincoln Global, Inc.Inventors: Jonathan Sterling Ogborn, Robert J. Weaver, Jon P. Chiappone, Craig B. Dallam
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Patent number: 8624160Abstract: A system and method of rating the arc maintainability of an electric arc welding stick electrode by creating an arc between the electrode and a workpiece; moving the electrode along the workpiece while maintaining the arc; decreasing either the current or the voltage until a point is reached where the arc is extinguished; determining the open circuit voltage at the point; and, rating the electrode based upon at least the open circuit voltage point.Type: GrantFiled: September 26, 2011Date of Patent: January 7, 2014Assignee: Lincoln Global, Inc.Inventors: Jonathan Sterling Ogborn, Robert J. Weaver, Jon P. Chiappone, Craig B. Dallam
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Publication number: 20130213947Abstract: A system and method of rating the arc maintainability of an electric arc welding stick electrode by creating an arc between the electrode and a workpiece; moving the electrode along the workpiece while maintaining the arc; decreasing either the current or the voltage until a point is reached where the arc is extinguished; determining the open circuit voltage at the point; and, rating the electrode based upon at least the open circuit voltage point.Type: ApplicationFiled: March 28, 2013Publication date: August 22, 2013Applicant: LINCOLN GLOBAL, INC.Inventors: JONATHAN STERLING OGBORN, ROBERT J. WEAVER, JON P. CHIAPPONE, CRAIG B. DALLAM
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Publication number: 20120012572Abstract: A system and method of rating the arc maintainability of an electric arc welding stick electrode by creating an arc between the electrode and a workpiece; moving the electrode along the workpiece while maintaining the arc; decreasing either the current or the voltage until a point is reached where the arc is extinguished; determining the open circuit voltage at the point; and, rating the electrode based upon at least the open circuit voltage point.Type: ApplicationFiled: September 26, 2011Publication date: January 19, 2012Applicant: LINCOLN GLOBAL, INC.Inventors: Jonathan Sterling Ogborn, Robert J. Weaver, Jon P. Chiappone, Craig B. Dallam
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Patent number: 8049141Abstract: A method of rating the arc maintainability of an electric arc welding stick electrode by creating an arc between the electrode and a workpiece; moving the electrode along the workpiece while maintaining the arc; decreasing either the current or the voltage until a point is reached where the arc is extinguished; determining the open circuit voltage at the point; and, rating the electrode based upon the open circuit voltage point.Type: GrantFiled: July 18, 2007Date of Patent: November 1, 2011Assignee: Lincoln Global, Inc.Inventors: Jonathan Sterling Ogborn, Robert J. Weaver, Jon P. Chiappone, Craig B. Dallam
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Publication number: 20090020514Abstract: A method of rating the arc maintainability of an electric arc welding stick electrode by creating an arc between the electrode and a workpiece; moving the electrode along the workpiece while maintaining the arc; decreasing either the current or the voltage until a point is reached where the arc is extinguished; determining the open circuit voltage at the point; and, rating the electrode based upon the open circuit voltage point.Type: ApplicationFiled: July 18, 2007Publication date: January 22, 2009Inventors: Jonathan Sterling Ogborn, Robert J. Weaver, Jon P. Chiappone, Craig B. Dallam
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Patent number: 7307238Abstract: A method of measuring the quality of a stick electrode used in forming the root bead of a pipe joint, which electrode has a wire diameter, a length substantially greater than 12 inches and an upper exposed rod head. The method comprises: preparing a standardized workpiece including two spaced plates with a groove between the plates having a set profile including a lower gap duplicating the root gap of the pipe joint and mounting the standardized workpiece on an incline with the groove facing upwardly where the incline is at a fixed known angle. Then a stick electrode of the type to be measured is selected and the rod head of the selected electrode is connected to the power lead of a DC power source set to a given output current correlated with the type of electrode.Type: GrantFiled: February 21, 2006Date of Patent: December 11, 2007Assignee: Lincoln Global, Inc.Inventors: Randall M. Burt, Jon P. Chiappone, Craig B. Dallam, Robert J. Weaver
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Patent number: 7304268Abstract: Stick welding electrode rating and ranking procedures are provided for determining stackability performance of stick electrodes for pipe welding operations. The rating technique involves performance of a standardized vertical down weld procedure using a stick electrode to form a weld bead in a test workpiece groove, in which the electrode is maintained during welding at a substantially constant angle relative to the workpiece groove. The electrode is advanced toward the groove at a slow speed to deposit molten metal in the groove while keeping the molten metal above the stick electrode end or the arc thereof without dripping. The resulting bead distance is measured along with the welding time and the stick electrode is rated according to a ratio of the weld time and the bead distance.Type: GrantFiled: February 16, 2006Date of Patent: December 4, 2007Assignee: Lincoln Global, Inc.Inventors: Randall M. Burt, Craig B. Dallam, Robert J. Weaver
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Patent number: 7147725Abstract: A welding flux that includes a flux agent, water glass and colloidal compound formed from small particles of silicon dioxide. The welding flux has a very low hygroscopicity, thus is well suited from low hydrogen electrodes.Type: GrantFiled: December 4, 2003Date of Patent: December 12, 2006Assignee: Lincoln Global, Inc.Inventors: Craig B. Dallam, Nikhil Karogal