Patents by Inventor David G. Almy
David G. Almy 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: 9718142Abstract: 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: March 31, 2016Date of Patent: August 1, 2017Assignee: 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: 20160207136Abstract: 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: March 31, 2016Publication date: July 21, 2016Applicant: 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: 9314865Abstract: 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: January 2, 2015Date of Patent: April 19, 2016Assignee: 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: 20150108103Abstract: 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: January 2, 2015Publication date: April 23, 2015Applicant: 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: 8927903Abstract: 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: November 14, 2013Date of Patent: January 6, 2015Assignee: 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: 20140175074Abstract: A method and system for pulse welding provides an output pulse waveform. The waveform has at least a frequency from a range of available frequencies not limited to harmonic frequencies. The waveform provides power suitable for welding, and has a plurality of background portions alternating with a plurality of peak portions. A transition down occurs from the peak portion to the background portion with a first acceleration and a transition up occurs from the background portion to the peak portion with a second acceleration. At least one of the first and second accelerations are non-zero over at least most of the transition. The waveform is preferably created by switching an inverter. Both accelerations may be non-zero, and each transition may have two accelerations, one negative closer to the peak, and one positive closer to the background. The accelerations may be constant with opposite polarity. Preferably the process is current controlled during the transitions. The process frequency may be fixed or varying.Type: ApplicationFiled: February 28, 2014Publication date: June 26, 2014Applicant: ILLINOIS TOOL WORKS INC.Inventors: Robert R. Davidson, David G. Almy, Richard J. Schuh
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Patent number: 8704131Abstract: A method and system for pulse welding provides an output pulse waveform. The waveform has at least a frequency from a range of available frequencies not limited to harmonic frequencies. The waveform provides power suitable for welding, and has a plurality of background portions alternating with a plurality of peak portions. A transition down occurs from the peak portion to the background portion with a first acceleration and a transition up occurs from the background portion to the peak portion with a second acceleration. At least one of the first and second accelerations are non-zero over at least most of the transition. The waveform is preferably created by switching an inverter. Both accelerations may be non-zero, and each transition may have two accelerations, one negative closer to the peak, and one positive closer to the background. The accelerations may be constant with opposite polarity. Preferably the process is current controlled during the transitions. The process frequency may be fixed or varying.Type: GrantFiled: March 31, 2006Date of Patent: April 22, 2014Assignee: Illinois Tool Works Inc.Inventors: Robert R. Davidson, David G. Almy, Richard J. Schuh
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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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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: 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: 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
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Patent number: 6121575Abstract: A method and apparatus for welding include a source of power, a wire feeder and a controller. The controller sends control signals to the wire feeder and the source of power. The controller also has an adjustable arc control input, and the controller controls at least three welding parameters in response to the arc control input. The arc control input may be an arc width input, and the controller may simultaneously control at least three welding parameters to obtain a desired arc width. The at least three welding parameters may include at least three of peak welding current, background welding current, pulse width, and frequency and the arc control input may be a user-selectable input.Type: GrantFiled: September 25, 1998Date of Patent: September 19, 2000Assignee: Illinois Tool Works Inc.Inventors: Brian L. Ott, David G. Almy, Jeffrey Ihde