Electrodes (e.g., Structure) Patents (Class 219/119)
  • Patent number: 10766095
    Abstract: A spot weld may be formed between an aluminum workpiece and an adjacent overlapping steel workpiece with the use of opposed spot welding electrodes that have mating weld faces designed for engagement with the outer surfaces of the workpiece stack-up assembly. The electrode that engages the stack-up assembly proximate the aluminum workpiece includes a central ascending convex surface and the electrode that engages the stack-up assembly proximate the steel workpiece has an annular surface. The mating weld faces of the first and second spot welding electrodes distribute the passing electrical current along a radially outwardly expanding flow path to provide a more uniform temperature distribution over the intended spot weld interface and may also produce a deformed bonding interface within the formed weld joint. Each of these events can beneficially affect the strength of the weld joint.
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: September 8, 2020
    Assignee: GM Global Technology Operations LLC
    Inventors: Hui-Ping Wang, Blair E. Carlson, David R. Sigler, Michael J. Karagoulis
  • Patent number: 10751830
    Abstract: A welding electrode is disclosed that includes an electrode welding shell and a blind adapter that are joined together to cooperatively define an internal cavity. The electrode welding shell and the blind adapter may be integrally formed or they may be distinct components that are attached together. The presence of the internal cavity defined by the electrode welding shell and the blind adapter reduces the thermal mass of the welding electrode and slows the rate of conductive heat transfer from the weld face to a cooling fluid, which allows in the center of the weld face to retain heat for a longer duration once current flow through the welding electrode is terminated, thereby positively affecting the spot welding process for particular types of workpiece stack-ups including those that include an aluminum workpiece and an overlapping adjacent steel workpiece.
    Type: Grant
    Filed: April 8, 2017
    Date of Patent: August 25, 2020
    Assignee: GM Global Technology Operations LLC
    Inventors: David R. Sigler, David S. Yang
  • Patent number: 10730135
    Abstract: An electrode cap and adapter assembly includes a cap having a useful life line inscribed thereon. The cap may be either a circumferentially configured internally finned cap or a self-dressing internally finned cap. The male/female adapter is used to mount a female cap to a male shank.
    Type: Grant
    Filed: May 21, 2015
    Date of Patent: August 4, 2020
    Inventor: Bryan Prucher
  • Patent number: 10675704
    Abstract: A method of resistance spot welding workpiece stack-ups of different combinations of metal workpieces with a single weld gun using the same set of welding electrodes is disclosed. In this method, a set of opposed welding electrodes that include an original shape and oxide-disrupting structural features are used to resistance spot weld at least two of the following types of workpiece stack-ups in a particular sequence: (1) a workpiece stack-up of two or more aluminum workpieces; (2) a workpiece stack-up that includes an aluminum workpiece and an adjacent steel workpiece; and (3) a workpiece stack-up of two or more steel workpieces. The spot welding sequence calls for completing all of the aluminum-to-aluminum spot welds and/or all of the steel-to-steel spot welds last.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: June 9, 2020
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: David R. Sigler, Blair E. Carlson, Michael J. Karagoulis
  • Patent number: 10668557
    Abstract: A spot welding electrode of a donut-shaped electrode wherein even when a welded member of a steel sheet is slanted with respect a plane perpendicular to an axis of the spot welding electrode, a cross tensile strength (CTS) of the spot welded joint can be improved. The donut shape spot welding electrode according to the present invention has an electrode tip and an electrode support. The electrode tip contacts the electrode support to be able to move. Due to this, it is possible to strikingly raise the ability of the donut-shaped electrode to track a steel sheet and make the entire surface of the donut shape contact-and-conduction part contact the steel sheet, so it is possible to secure a high CTS value even if the steel sheet is slanted.
    Type: Grant
    Filed: December 5, 2014
    Date of Patent: June 2, 2020
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Fuminori Watanabe, Tohru Okada, Seiji Furusako
  • Patent number: 10632562
    Abstract: A sliding member integrated with a guide pin is inserted into a guide hole of an electrode main body. An elastic ring is integrated with the guide pin under a state in which the guide pin passes through the elastic ring. A portion of the sliding member has a pressurizing end surface configured to press the elastic ring against an inner end surface of the guide hole. When the pressurizing end surface presses the elastic ring against the inner end surface, flow of the cooling air is interrupted. When the elastic ring is away from the inner end surface, the cooling air is allowed to flow.
    Type: Grant
    Filed: July 24, 2017
    Date of Patent: April 28, 2020
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Jyunnichi Suzuki, Takami Aramaki, Kenji Ninomiya, Hiromi Kudou, Yoshitaka Aoyama, Shoji Aoyama
  • Patent number: 10625369
    Abstract: A welding electrode unit includes a repositioning device that is movable. The repositioning device includes an energy storage device by way of which a welding electrode is connected directly or indirectly with the energy storage device can have a force applied to it for the purpose of a repositioning movement. The repositioning device is movable into a welding position by way of a forward movement and can be locked in the welding position.
    Type: Grant
    Filed: March 24, 2015
    Date of Patent: April 21, 2020
    Assignees: THYSSENKRUPP SYSTEM ENGINEERING GMBH, THYSSENKRUPP AG
    Inventors: Peter Cornelius, Jens Husner, Stefan Leidinger, Michael Döbert, David Klecha
  • Patent number: 10609805
    Abstract: A torch head for a liquid-cooled plasma arc torch is provided. The torch head includes a torch body and a torch insulator, coupled to the torch body, having a substantially non-conductive insulator body. The torch insulator includes (i) a first liquid coolant channel, disposed within the insulator body, configured to conduct a fluid flow from the torch head into a consumable cartridge along a first preexisting flow path, (ii) a first liquid return channel, disposed within the insulator body, configured to return at least a portion of the fluid flow from the cartridge to the torch head along the first preexisting flow path, and (iii) a gas channel, disposed within the insulator body, configured to conduct a first gas flow from the torch head to the cartridge along a second preexisting flow path. The first and second preexisting flow paths are fluidly isolated from each other.
    Type: Grant
    Filed: August 4, 2016
    Date of Patent: March 31, 2020
    Assignee: Hypertherm, Inc.
    Inventors: Nicholas A. Sanders, E. Michael Shipulski, Michael Hoffa
  • Patent number: 10595391
    Abstract: A plasma torch having an open end from which a plasma plume is emitted in use is disclosed. The plasma torch includes a central cathode rod, a grounded conductive tube having an open end and being arranged around the cathode and spaced therefrom to form a first cylindrical cavity open at one end; and a high voltage electrode having a dielectric barrier material at a radially inward-facing surface thereof and being arranged around the grounded conductive tube and spaced apart therefrom to form a second annular cylindrical cavity open at one end. A constant direct current (DC) electrical power plus a high voltage pulsed electrical power is provided to the cathode producing an arc discharge in the first cavity between the cathode and grounded tube to generate a central thermal plasma emitted at an open end of the first cylindrical cavity.
    Type: Grant
    Filed: November 2, 2015
    Date of Patent: March 17, 2020
    Assignee: FOURTH STATE MEDICINE LTD.
    Inventors: Aaron Knoll, Thomas Harle, Peter Shaw, Thomas Frame, Thomas Wantock
  • Patent number: 10551337
    Abstract: A device for processing—particularly stripping insulation, cutting, contacting, fitting-out, connecting, measuring or checking—a cable that has at least one insulated electrical conductor includes a metal tool movable relative to the cable and a measuring device by which contact with the electrical conductor by the tool is detectable. The tool is connected with a first electrode body movable relative to a second electrode body so that through the two electrode bodies, which bodies are separated from one another by an air gap or an insulating material, a coupling capacitor is formed, by which the metal tool is or can be coupled to the measuring device, to an alternating voltage source or to an electrical potential.
    Type: Grant
    Filed: June 30, 2016
    Date of Patent: February 4, 2020
    Assignee: KOMAX HOLDING AG
    Inventor: Stefan Viviroli
  • Patent number: 10396317
    Abstract: The present disclosure describes an ultrasonic welding apparatus, which improves the welding strength of an electrode tab and an electrode lead included in a secondary battery, and a secondary battery with an enhanced electrode structure strength by using the ultrasonic welding apparatus. The secondary battery includes an electrode assembly in which a cathode plate provided with a cathode tab, an anode plate provided with an anode tab, and a separator are stacked in turn; a pouch for receiving the electrode assembly; a cathode lead electrically coupled to the cathode tab by welding; and an anode lead electrically coupled to the anode tab by welding, wherein the density of welding points, formed at a welding surface between the anode lead and the anode tab, is higher than that of welding points, formed at a welding surface between the cathode lead and the cathode tab.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: August 27, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Kyung-Min Lee, Young-Joon Shin, Hyun-Woo Park, Jae-Pil Lee, Jin-Young Park, Jun-Kyu Park
  • Patent number: 10259071
    Abstract: A resistive welding electrode includes at least a weld face constructed of a refractory-based material that exhibits an electrical conductivity that is less than or equal to 65% of the electrical conductivity of commercially pure annealed copper as defined by the International Annealed Copper Standard (IACS). A method of using the resistive welding electrode to resistance spot weld a workpiece stack-up that includes an aluminum alloy workpiece and steel workpiece that overlap and contact each other at a faying interface is also disclosed.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: April 16, 2019
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: David R. Sigler, Blair E. Carlson, Michael J. Karagoulis, David P. Kelly
  • Patent number: 10207355
    Abstract: The present disclosure provides a welding electrode and methods of manufacturing the same. The welding electrode can include a composite body having a tip portion and an end portion. The composite body can include a shell defining a cavity through the end portion, the shell comprising a first metal that includes one or more of the following: a precipitation hardened copper alloy, copper alloy, and carbon steel. The composite body can also include a core within the shell, the core extending through the shell from the tip portion to the cavity, the core comprising a second metal that includes dispersion strengthened copper. The core and the shell have a metallurgical bond formed from co-extrusion.
    Type: Grant
    Filed: February 10, 2016
    Date of Patent: February 19, 2019
    Assignee: LUVATA OHIO, INC.
    Inventor: Brian E. Swank
  • Patent number: 10137524
    Abstract: A pressing unit presses a plurality of electrodes housed in a housing path in a housing case toward an electrode outlet port. When a lever member swings to one side, a distal end of the lever member comes to be in a first position in which the lever member covers a part of the electrode outlet port. When the lever member swings to the other side, the lever member comes to be in a second position in which the distal end exposes the electrode outlet port. A first coil spring is disposed between a proximal end of the lever member and a first side surface portion of the housing case, and biases the proximal end of the lever member to a direction away from the housing case.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: November 27, 2018
    Assignee: KYOKUTOH CO., LTD.
    Inventor: Kotaro Nakajima
  • Patent number: 10052710
    Abstract: A method of resistance spot welding a steel workpiece and an aluminum or aluminum alloy (“aluminum”) workpiece together includes several steps. One step involves providing a workpiece stack-up with a steel workpiece and an aluminum workpiece. Another step involves attaching a cover over a weld face of a welding electrode. The cover is made of a metal material with an electrical resistivity that is greater than an electrical resistivity of a material of the welding electrode. Yet another step involves performing multiple individual resistance spot welds to the workpiece stack-up. The cover abuts the aluminum workpiece while the individual resistance spot welds are performed. And another step involves removing the cover from the welding electrode after the individual spot welds are performed.
    Type: Grant
    Filed: August 19, 2014
    Date of Patent: August 21, 2018
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: David R. Sigler, Blair E. Carlson, Michael J. Karagoulis
  • Patent number: 10010966
    Abstract: A method of spot welding a workpiece stack-up that includes a steel workpiece and an aluminum alloy workpiece involves passing an electrical current through the workpieces and between welding electrodes that are constructed to affect the current density of the electrical current. The welding electrodes, more specifically, are constructed to render the density of the electrical current greater in the steel workpiece than in the aluminum alloy workpiece. This difference in current densities can be accomplished by passing, at least initially, the electrical current between a weld face of the welding electrode in contact with the steel workpiece and a perimeter region of a weld face of the welding electrode in contact with the aluminum alloy workpiece.
    Type: Grant
    Filed: February 14, 2014
    Date of Patent: July 3, 2018
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: David S. Yang, David R. Sigler, Blair E. Carlson, James G. Schroth, Michael J. Karagoulis
  • Patent number: 9937583
    Abstract: A welding assembly including a current generator, a first electrode electrically coupled to the current generator, the first electrode including a first engagement surface, a second electrode electrically coupled to the current generator, the second electrode including a second engagement surface, a width-determining fixture positioned between the first electrode and the second electrode to define a welding volume having a width, and an electrically nonconductive material positioned to electrically insulate at least one of the first electrode and the second electrode from an electrical conductor outside the width.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: April 10, 2018
    Assignee: Innovative Weld Solutions Ltd.
    Inventor: Venkatasubramanian Ananthanarayanan
  • Patent number: 9781816
    Abstract: A power contact for a liquid-cooled plasma arc cutting system is provided. The cutting system includes a torch body and a lower torch assembly. The power contact comprises a substantially hollow body including an upper portion and a lower portion, and an external surface of the upper portion of the hollow body configured to matingly engage the torch body. The power contact further includes a thread region disposed on an internal surface of the hollow body. The thread region is configured to retain an electrode holder of the lower torch assembly of the plasma arc cutting system to matingly engage the lower torch assembly and secure the lower torch assembly to the torch body.
    Type: Grant
    Filed: October 20, 2015
    Date of Patent: October 3, 2017
    Assignee: Hypertherm, Inc.
    Inventors: David J. Cook, David L. Bouthillier
  • Patent number: 9770779
    Abstract: A low-cost tip dressing cutter causing no accumulation of swarf around a breaker is provided. A surface of a breaker 5 facing a cutting plate 4 corresponds to a recessed surface 52. The diameter of the recessed surface 52 gradually decreases with increasing distance from the outer periphery of the recessed surface 52 facing the cutting plate 4 in a direction opposite to the cutting plate 4. A through hole 51 is formed at the center of the breaker 5, A screw 6 inserted through the through hole 51 is screwed to a fastening hole 33a of a holder 3 to attach the cutting plate 4 to the breaker 5.
    Type: Grant
    Filed: May 11, 2015
    Date of Patent: September 26, 2017
    Assignee: Kyokutoh Co., LTD.
    Inventor: Kazuhiro Tezawa
  • Patent number: 9682439
    Abstract: A welding electrode for resistance spot welding includes a weld face comprising rings of ridges that project outwardly from a base surface of the weld face. The rings of ridges are positioned on the weld face to contact and impress into a sheet metal workpiece surface during resistance spot welding. If the welding electrode is used during resistance spot welding of light metal alloy workpieces, such as those of aluminum alloy or magnesium alloy, the rings of ridges on the weld face can contribute to improved welding performance.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: June 20, 2017
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: David R. Sigler, Michael J. Karagoulis
  • Patent number: 9676052
    Abstract: A resistance welding method for welding a stack of three or more workpieces. The method includes the steps of holding a first welding tip in abutment against a first outermost workpiece, holding a second welding tip in abutment against a second outermost workpiece, and holding a pressing member in abutment against the first outermost workpiece. The method also includes the steps of gripping the stacked assembly with the first welding tip, the second welding tip, and the pressing member and passing an electric current between the first welding electrode and the second welding electrode.
    Type: Grant
    Filed: June 2, 2010
    Date of Patent: June 13, 2017
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Akira Goto, Yushi Aoki
  • Patent number: 9676065
    Abstract: A method for welding a plurality of aluminum to aluminum welds and a plurality of steel to steel welds using the same welder includes providing a resistance spot welder with a pair of weld electrodes having an electrode face radius of curvature in the range between 20 mm and 40 mm. The series of aluminum to aluminum welds is first made, and then, after completing the aluminum to aluminum welds, the series of steel to steel welds are made. After completing the steel to steel welds the weld electrodes are cleaned by an abrasive to remove any buildup or contamination of aluminum on the electrodes. In the event the electrodes have mushroomed, then dressing of the electrodes is provided and then the abrasive cleaning is performed to restore the surface texture.
    Type: Grant
    Filed: September 17, 2012
    Date of Patent: June 13, 2017
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: David R. Sigler, Michael J. Karagoulis
  • Patent number: 9662738
    Abstract: A welding electrode includes an electrode holder and an electrode cap removably attached to the holder and having a central longitudinal axis. The cap includes a body having an end, and a welding surface that is substantially smooth and free from any grooves defined therein, and has a first diameter of from about 7 to 10 mm, a first radius of curvature, and a second radius of curvature that is different from the first radius. The cap includes a skirt portion extending away from the body and configured to bear against the holder. The skirt portion has a first face that is substantially parallel to the axis and spaced apart from the surface. The body has a second face interconnecting the first face and the surface, and the body tapers from the first face to the surface. A method of forming a resistance spot weld joint is also disclosed.
    Type: Grant
    Filed: June 16, 2014
    Date of Patent: May 30, 2017
    Assignee: GM Global Technology Operations LLC
    Inventors: Sampath K. Vanimisetti, David R. Sigler
  • Patent number: 9649792
    Abstract: A method of forming a continuous sheet of pleated, hook-form, fastener product includes training a substrate about a pressure roll having an outer surface defining circumferential grooves. As the substrate approaches a nip between the pressure roll and a mold roll calendered with the pressure roll, a portion of the substrate is disposed within a corresponding one of the grooves between the pressure roll and a stationary horn extending into the groove whereby a longitudinally-extending pleat is formed in the substrate. The pleated substrate is then passed through the nip where resin regions are laminated to a side of the substrate opposed to the pleat.
    Type: Grant
    Filed: October 1, 2014
    Date of Patent: May 16, 2017
    Assignee: Velcro BVBA
    Inventor: Christopher M. Gallant
  • Patent number: 9517527
    Abstract: A method is disclosed for dressing a resistance stop welding (RSW) tip and a tip dresser apparatus. According to the method, a circumferential shoulder is cut to a predetermined depth from a distal end of the RSW tip. The shoulder is cut in the side wall to provide a reduced radius side wall and a reduced radius distal end on the RSW tip. The depth of dressing the distal end of the RSW tip is controlled by providing a stop that engages a step formed in the side wall formed by the circumferential shoulder. The tip dresser apparatus includes a first cutting blade retained by a first holder that cuts a step into the side wall to a predetermined depth. A second cutting blade retained by a second holder cuts a radiused surface on the distal end until the stop engages the step.
    Type: Grant
    Filed: April 3, 2014
    Date of Patent: December 13, 2016
    Assignee: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: William C. Moision, Elizabeth Therese Hetrick
  • Patent number: 9440308
    Abstract: A welding electrode according to the disclosure includes a body. A head is secured to the body and includes an aperture through which a pin extends. A polymer insulating sleeve is arranged between the pin and the head, for example. The sleeve material extends radially from an inner diameter to an outer diameter. The outer diameter engages the head, and the inner diameter is in close proximity to and engagement with the pin, which slides axially relative to the sleeve. The head and sleeve include first and second interlocking features that cooperate with one another to retain the sleeve in the aperture. The sleeve is arranged inboard from an outer face of the head, which is used to support a work piece.
    Type: Grant
    Filed: May 29, 2007
    Date of Patent: September 13, 2016
    Assignee: DOBEN LIMITED
    Inventors: Robert J. Roddy, Allan D. Parks
  • Patent number: 9399326
    Abstract: Method for stake-fastening an accessory (4) into a plastic fuel tank, whereby: the accessory (4) is equipped with at least one orifice (5) which passes right through the accessory (4); at least some of the plastic of which the wall of the tank (1) is made is melted; and some of the molten plastic is forced through the orifice (5) of the accessory without becoming detached from the remainder of the molten plastic; the protruding molten plastic is given an appropriate shape (8) to obtain a self-formed plastic rivet, and is left to solidify; the size and shape of the orifice (5) and/or of the solidified plastic (8) being such that the accessory (4) is mechanically fastened to the tank by at least some of the solidified plastic (8), the stake-fastening of the accessory (4) occurring at the time of manufacture of the tank (1) through the moulding of a split or at least two-part parison.
    Type: Grant
    Filed: October 2, 2013
    Date of Patent: July 26, 2016
    Assignee: PLASTIC OMNIUM ADVANCED INNOVATION AND RESEARCH
    Inventors: Bjorn Criel, Jules-Joseph Van Schaftingen, Pascal De Henau
  • Patent number: 9398679
    Abstract: Embodiments of the present invention are directed to an air cooled, retract-start plasma cutting torch having improved performance. The torch comprises any one, or a combination of an improved nozzle, electrode, shield cap and swirl ring, where these components have improved geometries and physical properties which optimize plasma jet performance during cutting.
    Type: Grant
    Filed: May 19, 2014
    Date of Patent: July 19, 2016
    Assignee: LINCOLN GLOBAL, INC.
    Inventor: Praveen K. Namburu
  • Patent number: 9357628
    Abstract: A plasma arc torch is provided that includes a tip having an improved life. The tip defines a first set of fluid passageways, a second set of fluid passageways and an internal cavity in fluid communication with the first and second fluid passageways. The internal cavity includes a base portion disposed proximate and surrounding a central orifice of the tip. A first set of fluid passageways allow for entry of a cooling fluid into the tip and a second set of fluid passageways allow for exit of the cooling fluid from the tip.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: May 31, 2016
    Assignee: Victor Equipment Company
    Inventors: Christopher J. Conway, Daniel Wayne Barnett, Nakhleh Hussary
  • Patent number: 9346118
    Abstract: A method is disclosed for using welding electrodes with a spherically-domed welding face having concentric contoured features formed into the face for better contact with workpiece surfaces. The concentric contoured features may be initially formed by rotating a cutting tool with a contoured cutting edge, the cutting edge being in engagement with the electrode face. A similar practice may be followed to re-create the weld face surface geometry if it becomes eroded or malformed during welding use. A suitable tool may have a blade-like geometry, with a mounting portion for supporting and positioning the tool in a rotating holder and a cutting edge. The cutting edge may have a contour complementary to that of the weld face and extend at least from the center of the weld face to at least the radial extent of the concentric contoured features.
    Type: Grant
    Filed: June 23, 2010
    Date of Patent: May 24, 2016
    Assignee: GM Global Technology Operations LLC
    Inventors: David R. Sigler, Michael J. Karagoulis
  • Patent number: 9333588
    Abstract: Methods of crack avoidance during resistance spot welding are provided. The compressive stress from the spot welding is distributed across an electrode assembly having an enlarged footprint. The electrode assembly includes a conductive core and a non-conductive cover. The delivery of current through the electrode assembly is localized to the conductive core.
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: May 10, 2016
    Assignee: GM Global Technology Operations LLC
    Inventors: Blair E. Carlson, Pei-Chung Wang, David S. Yang
  • Patent number: 9321122
    Abstract: A spot welding tip for use in a spot welding machine includes a base portion having a longitudinal base axis that passes through a center of the base portion. A tip portion extends from the base portion and provides a contact surface. The tip portion includes a longitudinal tip axis that passes through a center of the tip portion and a center of the contact surface. The spot welding tip includes a transverse axis that is perpendicular to both the base axis and the tip axis. The base axis and the tip axis are parallel to one another and offset from one another by a length. The contact surface is angled with respect to the transverse axis by an angle.
    Type: Grant
    Filed: December 6, 2005
    Date of Patent: April 26, 2016
    Assignee: Magna International Inc.
    Inventor: John E. Hill
  • Patent number: 9272350
    Abstract: Metallic components, including superalloy components such as turbine vanes and blades, are joined or repaired by electric resistance with a high electrical resistivity brazing alloy composition. In some embodiments the brazing alloy comprises filler metal selected from the group consisting of nickel, iron, and cobalt base alloy and elements selected from the group consisting of phosphorous (P), boron (B), silicon (Si), germanium (Ge), sulfur (S), selenium (Se), carbon (C), tellurium (Te) and manganese (Mn). In performing the method of the present invention a high electrical resistivity brazing alloy composition is introduced within a substrate defect or interposed between two substrates that are to be joined. An electric current is passed through the brazing alloy until the alloy melts and bonds to the adjoining substrate. High resistivity of the brazing alloy concentrates heat generated by the current flow in the brazing alloy rather than in the substrate.
    Type: Grant
    Filed: July 30, 2012
    Date of Patent: March 1, 2016
    Assignee: Siemens Energy, Inc.
    Inventors: David G Sansom, Gerald J. Bruck
  • Patent number: 9211604
    Abstract: In resistance welding, an end portion and a flange portion are welded together at contact surfaces thereof by applying a voltage between a first electrode and a second electrode while an inner casing and a main metal piece are pressed in directions toward each other. When a shearing stress due to the pressure is applied to a ceramic guide pin, the guide pin is more resistant to wear compared to a phenolic resin guide pin. In addition, a clearance is between a large-diameter portion of the guide pin and an inner surface of a guide-pin insertion hole. Accordingly, the guide pin is capable of tilting in the radial direction, so that the guide pin can tilt so as to partially absorb the shearing stress. Therefore, the guide pin is more resistant to breakage compared to a guide pin made of ceramic that is not capable of tilting.
    Type: Grant
    Filed: March 27, 2012
    Date of Patent: December 15, 2015
    Assignee: NGK INSULATORS, LTD.
    Inventor: Nobukazu Ikoma
  • Patent number: 9057001
    Abstract: A coating and method of making, using, and applying the coating to protect structures from scratches and/or the undesired collection of slag and/or spatter associated with metal working processes. The coating includes a base layer and a top layer that, when applied, mitigate adhesion of weld slag to the underlying structure. The coating is also transparent such that it does not interfere with the functionality of any indicia associated with the underlying structure or device and also renders the coating suitable for use with photo-reactive or responsive sensors and/or other non-opaque structures—such as goggles, facemasks, and/or shields.
    Type: Grant
    Filed: November 2, 2012
    Date of Patent: June 16, 2015
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Roberto S. Santos, Rahul Ganguli, Young Chung
  • Publication number: 20150136742
    Abstract: The invention provides a switching electrode which has a small variation in resistance value even when a large amount of current is repeatedly cut off and can carry a stable amount of current even when it is continuously used. In the invention, the switching electrode is used in a switch which includes a first switching electrode tip (21) and a second switching electrode tip (22), brings the first switching electrode tip (21) and the second switching electrode tip (22) into surface contact with each other to carry a current, and separates the first switching electrode tip (21) and the second switching electrode tip (22) to cut off the current. At least one of contact surfaces of the first switching electrode tip (21) and the second switching electrode tip (22) is a flat surface having an uneven portion.
    Type: Application
    Filed: April 30, 2013
    Publication date: May 21, 2015
    Inventors: Takahiro Morita, Shinichi Miyasaka, Yosuke Hiruma, Akira Goto, Tatsuro Ikeda
  • Patent number: 9024227
    Abstract: An apparatus for resistance welding with a welder includes a heat pipe including a hollow tube and a weld electrode fitted around a portion of the heat pipe. The weld electrode and heat pipe are conductively coupled to conduct heat across an inner surface of the weld electrode.
    Type: Grant
    Filed: September 8, 2011
    Date of Patent: May 5, 2015
    Assignee: GM Global Technology Operations LLC
    Inventors: Blair E. Carlson, Pei-Chung Wang
  • Publication number: 20150083694
    Abstract: A welding electrode for use in resistance spot welding an assembly of overlying metal workpieces that includes an aluminum alloy workpiece is disclosed. The welding electrode includes a body, a convex weld face at one end of the body, and ringed protrusions that project outwardly from the convex weld face. The ringed protrusions are positioned to make contact with, and indent into, a surface of the aluminum alloy workpiece when the convex weld face is pressed against the aluminum alloy workpiece during a spot welding event. When brought into contact with the surface of the aluminum alloy workpiece, the ringed protrusions disrupt the oxide film present on the aluminum alloy workpiece surface, which improves the spot welding process.
    Type: Application
    Filed: December 1, 2014
    Publication date: March 26, 2015
    Inventors: David R. Sigler, James G. Schroth, Michael J. Karagoulis
  • Publication number: 20150053654
    Abstract: A method of resistance spot welding a steel workpiece and an aluminum or aluminum alloy (“aluminum”) workpiece together includes several steps. One step involves providing a workpiece stack-up with a steel workpiece and an aluminum workpiece. Another step involves attaching a cover over a weld face of a welding electrode. The cover is made of a metal material with an electrical resistivity that is greater than an electrical resistivity of a material of the welding electrode. Yet another step involves performing multiple individual resistance spot welds to the workpiece stack-up. The cover abuts the aluminum workpiece while the individual resistance spot welds are performed. And another step involves removing the cover from the welding electrode after the individual spot welds are performed.
    Type: Application
    Filed: August 19, 2014
    Publication date: February 26, 2015
    Inventors: David R. Sigler, Blair E. Carlson, Michael J. Karagoulis
  • Patent number: 8963043
    Abstract: A welding assembly including a current generator, a first electrode electrically coupled to the current generator, the first electrode including a first engagement surface, and a second electrode electrically coupled to the current generator, the second electrode including a second engagement surface and defining a recess in the second engagement surface.
    Type: Grant
    Filed: May 7, 2009
    Date of Patent: February 24, 2015
    Assignee: Innovative Weld Solutions, Ltd.
    Inventor: Venkatasubramanian Ananthanarayanan
  • Patent number: 8957343
    Abstract: Provided is an electrode support structure in which local heating can be prevented from occurring in a workpiece during the electric heating. The electrode support structure is usable for applying a load to the electrodes used for the electric heating of a metal plate, and comprises at least two members, i.e., a first member to which the electrodes are fixed and a second member which receives the load from the first member or connects the first member to a load means. The support structure in which the two members are joined to each other through an elastic member can uniformly apply the load to the electrodes for electric heating so that the electrodes can uniformly contact with the workpiece, whereby the workpiece can be uniformly heated.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: February 17, 2015
    Assignee: Aisin Takaoka Co., Ltd.
    Inventors: Katsunori Ishiguro, Masaki Furuhashi
  • Patent number: 8933364
    Abstract: An electrode for a plasma arc torch includes a conductive body and a plurality of emissive inserts. The conductive body includes a proximal end portion, a distal end portion and a cavity extending from the proximal end portion to the distal end portion. The distal end portion defines a distal end face. The plurality of emissive inserts extend through the distal end face. The conductive body further defines a dimple extending into the distal end face and at least partially into the emissive inserts. The dimple is positioned concentrically about a centerline of the conductive body.
    Type: Grant
    Filed: February 6, 2014
    Date of Patent: January 13, 2015
    Assignee: Thermal Dynamics Corporation
    Inventors: Nakhleh Hussary, Christopher J. Conway
  • Publication number: 20140353292
    Abstract: A cold-formed electrode tip for use in spot welding is provided. The cold-formed electrode tip includes a base, a rounded face, and an annular wall extending along a longitudinal axis of the electrode tip, the annular wall having a thickness such that the annular wall is configured to be readily deformed by a handheld tool.
    Type: Application
    Filed: May 31, 2013
    Publication date: December 4, 2014
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Robert Daniel Anderzack, Thomas Edward Fischer, Daniel James Brewbaker, Herbert D. Schrader, Gregory A. Jolliff
  • Patent number: 8766132
    Abstract: A method of identifying and selecting welding electrodes and welding output parameters on a welding power source is provided. The method includes identifying electrodes and/or electrode packaging with distinct colors and/or patterns which correspond to properties of the electrode. The method also may include employing distinguishable identifying markings on a power supply which correspond to the electrodes to be used to allow for easy setting of output parameters.
    Type: Grant
    Filed: July 6, 2009
    Date of Patent: July 1, 2014
    Assignee: Lincoln Global, Inc.
    Inventors: George Blankenship, Rob Micco, Arthur B Papineau
  • Patent number: 8759709
    Abstract: An improved electrode for use in a plasma arc torch. The electrode includes an electrode body, a cavity in a front face at a first end of the electrode body, and an insert disposed in the cavity. The first end of the electrode body is formed of high purity copper containing at least 99.81% copper. The insert has a first end and a second end and is formed of a high emissivity material. A diameter of the first end of the insert is less than a diameter of a second end of the insert. An electrode is compressed to retain the insert using radial compression. The invention also includes a method for forming the electrode, and a method of operation of an electrode in a plasma torch.
    Type: Grant
    Filed: May 23, 2012
    Date of Patent: June 24, 2014
    Assignee: Hypertherm, Inc.
    Inventors: Jonathan P. Mather, Peter J. Twarog
  • Patent number: 8721849
    Abstract: A substantially ring-shaped seat section (8) protrudes from an inner circumference wall in a through hole (4) of a container attaching section (6) made of a metal. On an outer circumference of an electrode shaft (3) held in the through hole (4) through an insulator (5) made of a synthetic resin, locking protrusions (13, 14), which have a diameter larger than a hole diameter of the seat section (8), are provided at a distance from the seat section (8), on at least inner side or outer side of the seat section (8) in a shaft direction of the electrode shaft (3). Thus, for instance, when the inside of the metal container (2) is at a high temperature, the insulator (5) is destroyed and the electrode shaft (3) is to jump out from the container attaching section (6) to the outside or the inside of the metal container (2), the locking protrusions (13, 14) lock the seat section (8) and prevent the electrode shaft (3) from jumping out.
    Type: Grant
    Filed: December 27, 2005
    Date of Patent: May 13, 2014
    Assignee: Miura Co., Ltd.
    Inventors: Hideo Furukawa, Tomohisa Takeda
  • Patent number: 8710397
    Abstract: An electrode for a plasma torch and a plasma torch head comprise an elongated electrode holder with a front surface on the electrode tip and a hole arranged in the electrode tip along a central axis through the electrode holder, and an emission insert arranged in the hole such that an emission surface of the emission insert is exposed. The emission surface is set back relative to the front surface of the electrode holder. An electrode for a plasma torch and a plasma torch head also comprise an electrode socket and an electrode holder, the electrode socket having an internal thread, and the electrode holder having an external thread and an O-ring in a groove in the cylindrical outer surface. The electrode holder is screwed together with the electrode socket via the external thread and the internal thread and sealed by means of the O-ring.
    Type: Grant
    Filed: November 27, 2009
    Date of Patent: April 29, 2014
    Assignee: Kjellberg Finsterwalde Plasma and Maschinen GmbH
    Inventors: Katrin Jehnert, Martin Kroschwald, Frank Laurisch, Ralf-Peter Reinke, Thomas Steudtner, Volker Krink
  • Patent number: 8680426
    Abstract: An electrode for a plasma arc torch is provided by the teachings of the present disclosure. In one form, the electrode includes a conductive body, a plurality of deformed emissive inserts, and a dimple. In one form, the plurality of emissive inserts are concentrically nested about the centerline of the conductive body, and the dimple is positioned concentrically about a centerline of the conductive body. The plurality of emissive inserts and the dimple increase the life of the electrode.
    Type: Grant
    Filed: February 28, 2012
    Date of Patent: March 25, 2014
    Assignee: Thermal Dynamics Corporation
    Inventors: Nakhleh Hussary, Christopher J. Conway, Darrin MacKenzie
  • Patent number: 8653404
    Abstract: An in-liquid plasma electrode according to the present invention is an in-liquid plasma electrode for generating plasma in a liquid and has an electrically conductive member having an electric discharge end surface in contact with the liquid, and an electrically insulating member covering an outer periphery of the conductive member at least except the electric discharge end surface. Preferably, d and x satisfy ?2d?x?2d, where d is a length of a minor axis of the cross section when a conductive end portion of the electrically conductive member having the electric discharge end surface has an approximately circular cross section, or d is a length of a short side of the cross section when the conductive end portion has an approximately rectangular cross section, and x is a distance from a reference plane to a plane containing the electric discharge end surface when the reference plane is an end surface of the electrically insulating member that is approximately parallel with the electric discharge end surface.
    Type: Grant
    Filed: December 2, 2005
    Date of Patent: February 18, 2014
    Assignees: Kabushiki Kaisha Toyota Jidoshokki, Ehime University
    Inventors: Hitotoshi Murase, Toshihisa Shimo, Hiroaki Takashima, Hiromichi Toyota, Shinfuku Nomura, Tsunehiro Maehara
  • Patent number: 8633417
    Abstract: Embodiments of the present invention are related to an electrode for a plasma arc torch, the electrode comprising a generally tubular outer wall, an end wall, and a protrusion. The end wall is joined to a distal end of the outer wall and supports an emissive element in a generally central region. The protrusion extends from the generally central region of the end wall and is configured to connect with an electrode holder by a releasable connection, wherein the protrusion is configured such that at least one coolant passage forms between the protrusion and the electrode holder when the electrode is connected with the electrode holder. In some embodiments, the releasable connection comprises a threaded connection, wherein the protrusion is threaded to releasably connect to a threaded coolant tube of the electrode holder. In other embodiments, at least one coolant passage is defined by the threaded connection.
    Type: Grant
    Filed: December 1, 2010
    Date of Patent: January 21, 2014
    Assignee: The ESAB Group, Inc.
    Inventors: Koustubh D. Ashtekar, David C. Griffin, Gregory W. Diehl, Dale T. Wiersema