Patents by Inventor David Charles Griffin
David Charles Griffin 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: 10743399Abstract: Techniques for extinguishing a plasma arc in a blowback plasma torch are provided. The plasma arc can be extinguished by bringing the electrode into contact with the nozzle and out of contact with the nozzle while the power supply and flow of gas are left on. In particular, while current is flowing through the electrode, the electrode may be brought into contact with the nozzle to extinguish the plasma arc.Type: GrantFiled: September 16, 2014Date of Patent: August 11, 2020Assignee: THE ESAB GROUP, INC.Inventors: David Charles Griffin, Wayne Stanely Severence, Jr., Daniel Thayer, Sriram Ramadurai
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Publication number: 20160081176Abstract: Techniques for extinguishing a plasma arc in a blowback plasma torch are provided. The plasma arc can be extinguished by bringing the electrode into contact with the nozzle and out of contact with the nozzle while the power supply and flow of gas are left on. In particular, while current is flowing through the electrode, the electrode may be brought into contact with the nozzle to extinguish the plasma arc.Type: ApplicationFiled: September 16, 2014Publication date: March 17, 2016Inventors: David Charles Griffin, Wayne Stanely Severence, JR., Daniel Thayer, Sriram Ramadurai
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Patent number: 9288888Abstract: A plasma arc torch includes an annular baffle defining distinct faces A, B, C, and D. Faces A and C are opposite from each other, and faces B and D are opposite from each other. First passages for fluid flow extend between the faces A and C, and second passages extend between the faces B and D. The baffle is installable in an annular space between an inner wall and an outer wall, in either of two orientations. In a first orientation, the first passages are open to fluid flow and the second passages are closed by engagement of the inner and outer walls with the faces B and D, and in a second orientation, flipped over relative to the first orientation, the second passages are open to fluid flow and the first passages are closed by engagement of the inner and outer walls with the faces A and C.Type: GrantFiled: December 20, 2013Date of Patent: March 15, 2016Assignee: The ESAB Group, Inc.Inventors: David Charles Griffin, Gregory William Diehl, Christopher Reed Martin, Wayne Stanley Severence, Jr.
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Publication number: 20140217069Abstract: A plasma arc torch includes an annular baffle defining distinct faces A, B, C, and D. Faces A and C are opposite from each other, and faces B and D are opposite from each other. First passages for fluid flow extend between the faces A and C, and second passages extend between the faces B and D. The baffle is installable in an annular space between an inner wall and an outer wall, in either of two orientations. In a first orientation, the first passages are open to fluid flow and the second passages are closed by engagement of the inner and outer walls with the faces B and D, and in a second orientation, flipped over relative to the first orientation, the second passages are open to fluid flow and the first passages are closed by engagement of the inner and outer walls with the faces A and C.Type: ApplicationFiled: December 20, 2013Publication date: August 7, 2014Applicant: The ESAB Group, Inc.Inventors: David Charles Griffin, Gregory William Diehl, Christopher Reed Martin, Wayne Stanley Severence, JR.
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Patent number: 8624149Abstract: A plasma arc torch includes an annular baffle defining distinct faces A, B, C, and D. Faces A and C are opposite from each other, and faces B and D are opposite from each other. First passages for fluid flow extend between the faces A and C, and second passages extend between the faces B and D. The baffle is installable in an annular space between an inner wall and an outer wall, in either of two orientations. In a first orientation, the first passages are open to fluid flow and the second passages are closed by engagement of the inner and outer walls with the faces B and D, and in a second orientation, flipped over relative to the first orientation, the second passages are open to fluid flow and the first passages are closed by engagement of the inner and outer walls with the faces A and C.Type: GrantFiled: January 11, 2012Date of Patent: January 7, 2014Assignee: The ESAB Group, Inc.Inventors: David Charles Griffin, Gregory William Diehl, Christopher Reed Martin
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Publication number: 20130175244Abstract: A plasma arc torch includes an annular baffle defining distinct faces A, B, C, and D. Faces A and C are opposite from each other, and faces B and D are opposite from each other. First passages for fluid flow extend between the faces A and C, and second passages extend between the faces B and D. The baffle is installable in an annular space between an inner wall and an outer wall, in either of two orientations. In a first orientation, the first passages are open to fluid flow and the second passages are closed by engagement of the inner and outer walls with the faces B and D, and in a second orientation, flipped over relative to the first orientation, the second passages are open to fluid flow and the first passages are closed by engagement of the inner and outer walls with the faces A and C.Type: ApplicationFiled: January 11, 2012Publication date: July 11, 2013Applicant: The ESAB Group, Inc.Inventors: David Charles Griffin, Gregory William Diehl, Christopher Reed Martin
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Patent number: 6969819Abstract: A plasma torch is provided having a tubular member defining a bore extending axially between first and second ends, and nozzle engaged with the first end. A movable member is engaged in the tubular member bore, and includes a first end disposed toward the nozzle and a second end, with a piston member engaged therewith away from the first end. An electrode has a first portion defining a bore and is received by the movable member first end. The electrode has a second portion extending outwardly from the movable member first end toward the nozzle, and a radially outward-extending medial flange between the first and second portions axially outward of the movable member first end. The electrode is movable between an inoperable position in contact with the nozzle and an operable position separated from the nozzle and the medial flange in contact with the tubular member first end.Type: GrantFiled: May 18, 2004Date of Patent: November 29, 2005Assignee: The ESAB Group, Inc.Inventor: David Charles Griffin
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Patent number: 6427894Abstract: An electrode wire feeder, including a housing defining a sealed compartment for containing a suitable lubricant, respective pairs of feed rolls rotatably mounted exteriorly of said housing, on rotatable shafts, one of the shafts of each pair of feed rolls being mounted in eccentric mounting member rotatably mounted in one wall of the housing for moving one of the feed rolls of each pair between operative and inoperative positions, pinion gears mounted on the inner ends of the feed roll shafts inside the lubricant compartment with the pinion gears of the movable shafts moving into and out of meshing relation with the other pinion gears, a motor driven gear in the compartment and meshing with the pinion gears for driving the feed rolls, and manually operable levers for rotating the eccentric mounting members to move the feed rolls between operative and inoperative positions.Type: GrantFiled: October 19, 2000Date of Patent: August 6, 2002Assignee: The ESAB Group, Inc.Inventors: Leon William Blank, David Charles Griffin, Dale Thomas Wiersema