Patents by Inventor Robert R. Davidson
Robert R. Davidson 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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Publication number: 20140069901Abstract: A method and apparatus for welding is disclosed. The output is preferably a cyclical CV MIG output, and each cycle is divided into segments. An output parameter is sampled a plurality of times within one or more of the segments. The CV output is controlled within the at least one segment in response to the sampling. The parameter is output power, a resistance of the load, an output current, an output voltage, or functions thereof in various embodiments. The control loop is preferably a PI or PID loop. The loop may be applied only within a window. The set point may be taught or fixed. The system can be used to weld with a controlled arc length.Type: ApplicationFiled: November 14, 2013Publication date: March 13, 2014Applicant: ILLINOIS TOOL WORKS INC.Inventors: Robert R. Davidson, James L. Uecker, Todd E. Holverson, David G. Almy, Curt J. Beck
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Publication number: 20140048517Abstract: A controller for a welding system adapted to determine a value of a weld secondary parameter across a weld secondary component based on a sensed parameter is provided. The controller may also be adapted to compare the determined value to a reference value range and to alert a user to a presence and location of a weld secondary error when the determined value is outside the referenced value range.Type: ApplicationFiled: October 28, 2013Publication date: February 20, 2014Applicant: Illinois Tool Works Inc.Inventors: Robert R. Davidson, Richard Schuh, Anthony J. Kowaleski, Thomas A. Bunker, Nicholas James Dessart, Bruce A. Casner
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Patent number: 8598492Abstract: A method and apparatus for welding is disclosed. The output is preferably a cyclical CV MIG output, and each cycle is divided into segments. An output parameter is sampled a plurality of times within one or more of the segments. The CV output is controlled within the at least one segment in response to the sampling. The parameter is output power, a resistance of the load, an output current, an output voltage, or functions thereof in various embodiments. The control loop is preferably a PI or PID loop. The loop may be applied only within a window. The set point may be taught or fixed. The system can be used to weld with a controlled arc length.Type: GrantFiled: October 4, 2006Date of Patent: December 3, 2013Assignee: Illinois Tool Works Inc.Inventors: Robert R. Davidson, James L. Uecker, Todd E. Holverson, David G. Almy, Curt J. Beck
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Patent number: 8592721Abstract: A controller for a welding system adapted to determine a value of a weld secondary parameter across a weld secondary component based on a sensed parameter is provided. The controller may also be adapted to compare the determined value to a reference value range and to alert a user to a presence and location of a weld secondary error when the determined value is outside the referenced value range.Type: GrantFiled: January 22, 2013Date of Patent: November 26, 2013Assignee: Illinois Tool Works Inc.Inventors: Robert R. Davidson, Richard Schuh, Anthony J. Kowaleski, Thomas A. Bunker, Bruce A. Casner, Nicholas James Dessart
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Patent number: 8592723Abstract: A data structure for weld programs associates configuration data for a welding system with a plurality of weld programs and weld sequence data. The data structure allows the welding system to be configured for a particular part, operator, or stage in a welding process, and to be easily reconfigured when the part, operator, or stage changes, providing improved efficiency and flexibility in operation.Type: GrantFiled: February 8, 2011Date of Patent: November 26, 2013Assignee: Illinois Tool Works Inc.Inventors: Robert R. Davidson, Anthony J. Kowaleski, Bruce A. Casner, L. Thomas Hayes, Richard J. Schuh
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Publication number: 20130270245Abstract: A method and apparatus for welding include initiating a pulse welding process includes initiating a welding arc by providing CC type welding power, maintaining the arc by providing CV type power. Then, pulse type welding power is provided. The method and system can be used to start short circuit, or other welding processes by providing short circuit power, or welding power of a given mode, instead of providing pulse power. Also, in one alternative, a method and system of initiating a pulse, short circuit, or given welding process includes initiating a welding arc by providing CC type welding power at least until a pseudo-equilibrium for the arc is established. Then, providing welding power in a pulse, short circuit, or the given mode.Type: ApplicationFiled: June 13, 2013Publication date: October 17, 2013Applicant: ILLINOIS TOOL WORKS INC.Inventors: Todd E. Holverson, James L. Uecker, Robert R. Davidson, Richard M. Hutchison
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Patent number: 8487215Abstract: A method and apparatus for welding include initiating a pulse welding process includes initiating a welding arc by providing CC type welding power, maintaining the arc by providing CV type power. Then, pulse type welding power is provided. The method and system can be used to start short circuit, or other welding processes by providing short circuit power, or welding power of a given mode, instead of providing pulse power. Also, in one alternative, a method and system of initiating a pulse, short circuit, or given welding process includes initiating a welding arc by providing CC type welding power at least until a pseudo-equilibrium for the arc is established. Then, providing welding power in a pulse, short circuit, or the given mode.Type: GrantFiled: November 23, 2005Date of Patent: July 16, 2013Assignee: Illinois Tool Works Inc.Inventors: Todd E. Holverson, James L. Uecker, Robert R. Davidson, Richard M. Hutchison
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Patent number: 8367972Abstract: A controller for a welding system adapted to determine a value of a weld secondary parameter across a weld secondary component based on a sensed parameter is provided. The controller may also be adapted to compare the determined value to a reference value range and to alert a user to a presence and location of a weld secondary error when the determined value is outside the referenced value range.Type: GrantFiled: June 10, 2010Date of Patent: February 5, 2013Assignee: Illinois Tool Works Inc.Inventors: Robert R. Davidson, Richard Schuh, Anthony J. Kowaleski, Thomas A. Bunker, Bruce A. Casner, Nicholas James Dessart
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Publication number: 20120248080Abstract: Stickout of a welding electrode wire from a welding torch is determined during welding, and based upon a welding parameter, such as welding current. Different relationships are used for the determination depending upon whether the welding wire is in a short-circuit condition or an arc condition. The stickout may be converted to a standardized unit of measure to make it readily understandable to an operator. The stickout may be logged and associated with other parameters and information, such as workpiece, operator, welding system, date and time. The stickout may be used as the basis for an alarm or a disabling operation. Moreover, the stickout may be provided on a readout for the operator. It may also be used as a basis for controlling a wire feeding apparatus that retracts the welding wire to a desired stickout following a weld.Type: ApplicationFiled: March 28, 2012Publication date: October 4, 2012Applicant: ILLINOIS TOOL WORKS INC.Inventors: Richard Martin Hutchison, James Lee Uecker, Todd Earl Holverson, Knut Norman Froland, Michael J. O'Dell, Kenneth J. Puls, Robert R. Davidson, Richard Schuh
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Publication number: 20120095941Abstract: A method and apparatus for providing welding-type power is disclosed and includes a cost calculator.Type: ApplicationFiled: August 5, 2011Publication date: April 19, 2012Applicant: Illinois Tool Works Inc.Inventors: Grant A. Dolson, Anthony J. Kowaleski, Robert R. Davidson, Bruce Alan Casner, Knut Norman Froland, L. Thomas Hayes, Richard John Schuh
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Publication number: 20120061362Abstract: A method and apparatus for providing welding-type power is disclosed and includes a short clearing prediction module that uses the second derivative with respect to time of the output voltage, or an error between a measured output voltage and an output voltage predicted using the first derivative with respect to time of the output voltage.Type: ApplicationFiled: November 12, 2010Publication date: March 15, 2012Applicant: Illinois Tool Works Inc.Inventors: Robert R. Davidson, Richard M. Hutchison, James L. Uecker
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Publication number: 20110246395Abstract: A method and apparatus for providing welding-type power is disclosed and includes a cost calculator.Type: ApplicationFiled: December 31, 2010Publication date: October 6, 2011Applicant: Illinois Tool Works Inc.Inventors: Grant A. Dolson, Anthony J. Kowaleski, Robert R. Davidson, Bruce A. Casner, Knut N. Froland, L. Thomas Hayes, Richard John Schuh
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Publication number: 20110198329Abstract: A data structure for weld programs associates configuration data for a welding system with a plurality of weld programs and weld sequence data. The data structure allows the welding system to be configured for a particular part, operator, or stage in a welding process, and to be easily reconfigured when the part, operator, or stage changes, providing improved efficiency and flexibility in operation.Type: ApplicationFiled: February 8, 2011Publication date: August 18, 2011Inventors: Robert R. Davidson, Anthony J. Kowaleski, Bruce A. Casner, L. Thomas Hayes, Richard J. Schuh
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Publication number: 20110163080Abstract: A method and apparatus for welding uses a power circuit and a controller connected to the power circuit. The controller included a welding program having a limited term. The program may be part of a system, or a stand alone program. The controller has a data port and the welding program and/or an authorization is received by the controller on the data port in one embodiment. The welding program includes a limited time module, a limited time in use module, a limited arc start module, a controlled short circuit program, and/or a pulse program in various embodiments. A second welding program, without a limited term module, may be provided.Type: ApplicationFiled: March 15, 2011Publication date: July 7, 2011Applicant: Illinois Tool Works Inc.Inventors: Curt J. Beck, Robert R. Davidson
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Publication number: 20110114612Abstract: A method and apparatus for welding include initiating a pulse welding process includes initiating a welding arc by providing CC type welding power, maintaining the arc by providing CV type power. Then, pulse type welding power is provided. The method and system can be used to start short circuit, or other welding processes by providing short circuit power, or welding power of a given mode, instead of providing pulse power. Also, in one alternative, a method and system of initiating a pulse, short circuit, or given welding process includes initiating a welding arc by providing CC type welding power at least until a pseudo-equilibrium for the arc is established. Then, providing welding power in a pulse, short circuit, or the given mode.Type: ApplicationFiled: April 30, 2010Publication date: May 19, 2011Applicant: Illinois Tool Works Inc.Inventors: Todd E. Holverson, James L. Uecker, Robert R. Davidson, Richard M. Hutchison
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Publication number: 20100314371Abstract: A controller for a welding system adapted to determine a value of a weld secondary parameter across a weld secondary component based on a sensed parameter is provided. The controller may also be adapted to compare the determined value to a reference value range and to alert a user to a presence and location of a weld secondary error when the determined value is outside the referenced value range.Type: ApplicationFiled: June 10, 2010Publication date: December 16, 2010Applicant: Illinois Tool Works Inc.Inventors: Robert R. Davidson, Richard Schuh, Anthony J. Kowaleski, Thomas A. Bunker, Bruce A. Casner, Nicholas James Dessart
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Publication number: 20070267394Abstract: A method and apparatus for welding uses a power circuit and a controller connected to the power circuit. The controller included a welding program having a limited term. The program may be part of a system, or a stand alone program. The controller has a data port and the welding program and/or an authorization is received by the controller on the data port in one embodiment. The welding program includes a limited time module, a limited time in use module, a limited arc start module, a controlled short circuit program, and/or a pulse program in various embodiments. A second welding program, without a limited term module, may be provided.Type: ApplicationFiled: May 19, 2006Publication date: November 22, 2007Applicant: Illinois Tool Works Inc.Inventors: Curt J. Beck, Robert R. Davidson
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Patent number: 7129443Abstract: A method and apparatus for welding is disclosed. The output is preferably a cyclical CV MIG output, and each cycle is divided into segments. An output parameter is sampled a plurality of times within one or more of the segments. The CV output is controlled within the at least one segment in response to the sampling. The parameter is output power, a resistance of the load, an output current, an output voltage, or functions thereof in various embodiments. The control loop is preferably a PI or PID loop. The loop may be applied only within a window. The set point may be taught or fixed. The system can be used to weld with a controlled arc length.Type: GrantFiled: December 7, 2004Date of Patent: October 31, 2006Assignee: Illinois Tool Works Inc.Inventors: Robert R. Davidson, James L. Uecker, Todd E. Holverson, David G. Almy, Curt J. Beck
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Patent number: 6974932Abstract: A method and apparatus for welding include initiating a pulse welding process includes initiating a welding arc by providing CC type welding power, maintaining the arc by providing CV type power. Then, pulse type welding power is provided. The method and system can be used to start short circuit, or other welding processes by providing short circuit power, or welding power of a given mode, instead of providing pulse power. Also, in one alternative, a method and system of initiating a pulse, short circuit, or given welding process includes initiating a welding arc by providing CC type welding power at least until a pseudo-equilibrium for the arc is established. Then, providing welding power in a pulse, short circuit, or the given mode.Type: GrantFiled: March 31, 2003Date of Patent: December 13, 2005Assignee: Illinois Tool Works Inc.Inventors: Todd E. Holverson, James L. Uecker, Robert R. Davidson, Richard M. Hutchison
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Patent number: 6909067Abstract: A method and apparatus for welding is disclosed. The output is preferably a cyclical CV MIG output, and each cycle is divided into segments. An output parameter is sampled a plurality of times within one or more of the segments. The CV output is controlled within the at least one segment in response to the sampling. The parameter is output power, a resistance of the load, an output current, an output voltage, or functions thereof in various embodiments. The control loop is preferably a PI or PID loop. The loop may be applied only within a window. The set point may be taught or fixed. The system can be used to weld with a controlled arc length.Type: GrantFiled: October 9, 2002Date of Patent: June 21, 2005Assignee: Illinois Tool Works Inc.Inventors: Robert R. Davidson, James Uecker, Todd Holverson, David G. Almy, Curtis J. Beck