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| Number | Title | Issue Date |
| 7247810 | Module for resistance welding tongs The invention originates in the field of resistance welding technology, among other means by means of welding robots 1, for use in roll seam welding, projection welding or spot welding, and has to do with accommodating components for operation inside the hous... | 07/24/2007 |
| 7145097 | Method and apparatus for electrical resistance spot welding using electrical servo actuator The present invention provides a servo driven spot welder where an electric servo actuator moves at least one of two electrodes to and away from the workpiece. The servo driven spot welder includes a controller that allows accurate control of the position of one of ... | 12/05/2006 |
| 7142085 | Insulation and integrated heat sink for high frequency, low output voltage toroidal inductors and transformers Toroidal transformer and inductor configurations are described that allow for greater heat transfer away from internal device components. The inventive transformer allows for higher thermal and electrical efficiency, as well as for more efficient use of expensive co... | 11/28/2006 |
| 6909064 | Pinch weld gun with swivel shunt connection A weld gun including a frame structure, a weld arm mounted on the frame structure, an electrode mounted on the weld arm and including an electrode cap at one end of the electrode, a transformer, and a shunt fixedly secured at one end thereof to another end of the el... | 06/21/2005 |
| 6756558 | High current, low impedance resistance welding device A resistance welding apparatus characterized by very low output impedance, and providing a substantially constant voltage source to low impedance (e.g., resistances on the order of 1-100 micro-ohms) materials-to-be-joined. The welding apparatus includes one or more ... | 06/29/2004 |
| 6288356 | Apparatus for making welds through partitions in battery cases An apparatus for welding that includes a fixture for locating product including a weldable material having a relatively sharp melting point. The apparatus also includes a robot positioned adjacent the fixture and that has a moveable arm and a controller p... | 09/11/2001 |
| 6066824 | Resistance welding system with a self-contained close-loop cooling arrangement A resistance welding system with a self-contained close-loop cooling arrangement which includes a chiller, a welding transformer, a cable and a welding gun. The chiller has a feed-port and return-port for the cooling fluid. The welding transformer has an ... | 05/23/2000 |
| 5416288 | Multiple spot resistance welding machine for welding wire grids A multiple spot resistance welding machine for the welding of wire grids by direct current comprises several contact electrodes (4.1.1, 4.2.1, 4.1.2, 4.2.2, . . . ) contacting a respectively associated grid point from both sides. The switching arrangement... | 05/16/1995 |
| 5360959 | Direct current resistance welding machine and method of controlling the same A direct current resistance welding machine and a method of controlling the direct current resistance welding machine wherein primary current of a welding transformer is detected when a plurality of switching devices of an inverter are controlled based on... | 11/01/1994 |
| 5313040 | Multi-unit welding apparatus A multi-unit welding apparatus has a row of electric welding units all of which are connected in parallel with a single welding transformer through an electric conductor assembly. The electric conduction assembly includes a single strip of electric conduc... | 05/17/1994 |
| 5276296 | Welding gun apparatus In a DC type C-shaped welding gun apparatus having a transformer mounted thereon, a center tap of the transformer is communicated to a movable gun arm via an ounce metal plate. A rear end portion of a stationary gun arm is pressingly held between a pair o... | 01/04/1994 |
| 5166491 | Master computer controlled modular welder, weld control and power unit apparatus and method A welder apparatus has many welder assemblies. Each of welder assemblies is formed of a weld control transformer (WCT) to which a welding gun is attached, and a weld control unit (WCU) integrally but detachably connected to the WCT. The feature of the det... | 11/24/1992 |
| 5160820 | Welding transformer and method of manufacturing same A welding transformer for use in a resistance welding machine has primary and secondary coils. The primary coil includes a plurality of spaced juxtaposed coil units mounted on a base board. Each of the coil units includes a plurality of juxtaposed coil un... | 11/03/1992 |
| 5138129 | Welding transformer in a welding gun for robot A welding transformer in a welding gun for robot capable of lightening the weight thereof as a whole and of reducing the assembling and disassembling process of the constituents thereof. The welding transformer is disposed within a cradle composed of a ho... | 08/11/1992 |
| 5128511 | Welding apparatus and transformer therefor A welding apparatus is disclosed to include an electrically insulating casing, first and second welding electrodes, and one or more welding transformer cores having toroidal cores, multi-turn primary windings and a single-turn secondary winding. The cores... | 07/07/1992 |
| 5122634 | Welding transformer control apparatus There is disclosed a welding transformer control apparatus capable of controlling the voltage supplied to the primary winding of the welding transformer. The welding transformer control apparatus comprises a voltage detecting circuit connected to the thyr... | 06/16/1992 |
| 5113053 | Welding gun for robot The present invention provides a welding gun for robot provided with a cradle formed of a hollow frame. The cradle has side plates serving also as stopper receivers for receiving stoppers of the welding gun arms, thereby eliminating an extra member for re... | 05/12/1992 |
| 5111019 | Variable-pitch spot welding gun assembly for a welding robot A variable pitch spot welding gun assembly for a welding robot has a fixed base (16) directly attached to the robot wrist (12) of an industrial welding robot, welding transformers (24, 26) fixed to the fixed base (16), a fixed spot welding gun (22) provid... | 05/05/1992 |
| 5111018 | Connection member in a welding gun for robot A connection member in a welding gun for a robot having a cradle of the welding gun generates less stress by directly connecting the cradle with a robot wrist, whereby the welding gun is positioned as close as possible to the robot wrist. The welding gun ... | 05/05/1992 |
| 5077458 | Resistance welding apparatus with gun-arm mounted transformer A resistance welding apparatus mounted on a robot arm includes a transformer having primary and secondary windings. Two gun arms supporting respective welding electrodes in confronting relation to each other are relatively movable toward and away from eac... | 12/31/1991 |
| 5053599 | Welding gun assembly with transformers A welding gun assembly includes a welding gun with a pair of electrodes for welding workpieces together therebetween. The welding gun assembly includes an array of transformers extending in one direction and having respective secondary coils. The welding ... | 10/01/1991 |
| 5030813 | Welding apparatus and transformer therefor A welding apparatus is disclosed to include an electrically insulating casing, first and second welding electrodes, and a welding transformer having a toroidal core, a multi-turn primary winding and a single-turn secondary winding. The core includes a gra... | 07/09/1991 |
| 5023423 | Transformer apparatus with rectifiers A transformer apparatus for use with a welding gun includes four transformer/rectifier assemblies each including a transformer having a secondary winding and a rectifier, a terminal plate connected to the secondary winding through the rectifier, and a cen... | 06/11/1991 |
| 4987281 | Apparatus for continuous-direct-resistance heating of long-length particles The present invention relates to an apparatus for continuous-direct-resistance heating of long-length articles wherein the travelling long-length article is made to contact with roll electrodes disposed in a specified spacing, then made to pass through an... | 01/22/1991 |
| 4985612 | Master computer controlled modular welder, weld control, and power unit apparatus and method A welder apparatus has many welder assemblies. Each of welder assemblies is formed of a weld control transformer (WCT) to which a welding gun is attached, and a weld control unit (WCU) integrally but detachably connected to the WCT. The feature of the det... | 01/15/1991 |
| 4943904 | D.C. power unit assembly including unitized single-phase D.C. power units The specification discloses a physically compact, low-inductance, high power-factor D.C. power unit assembly for producing rectified, multi-phase or single-phase, full-wave voltage. The assembly includes a plurality of single-phase, full-wave D.C. power u... | 07/24/1990 |
| 4861959 | Resistance spot welding gun and transformer assembly An assembly is provided for mounting on an end of a robot arm actuator as an integral spot resistance welding gun and transformer unit. A gun slide support bracket is connected to the transformer and serves to provide a mount for a sliding gun cylinder ha... | 08/29/1989 |
| 4831229 | High frequency resistance spot welding structure and method High frequency resistance spot welding structure and method. In one embodiment, the structure includes dual, mirror image welding transformers, each including a transformer secondary circuit, an endless transformer core, and a transformer primary winding ... | 05/16/1989 |
| 4822969 | Apparatus for continuous-direct-resistance heating of long-length articles The present invention relates to an apparatus for continuous-direct-resistance heating of long-length articles wherein the travelling long-length article is made to contact with roll electrodes disposed in a specified spacing, then made to pass through an... | 04/18/1989 |
| 4803325 | Resistance seam welding machine A resistance seam welding machine is described, particularly for the longitudinal seam welding of can bodies, wherein, in the secondary loop (16), feed and return lines are constructed partially as a double line (18, 28) and in all the remaining portion (... | 02/07/1989 |
| 4737704 | Transformer for arc and plasma setups having broad current adjustment range A variable-ratio transformer for arc and plasma setups, comprising a magnetic core made up of a main part composed of two yokes and legs in accordance with the number of phases and an additional part disposed on the side of the yoke of the main part of th... | 04/12/1988 |
| 4733045 | Method of and structure for high speed resistance seam welding A method of and structure for high speed seam welding. The method comprises placing an auxiliary transformer between a three phase source of electrical welding energy and seam welder structure, which auxiliary transformer includes three separate primary w... | 03/22/1988 |
| 4721841 | Control device for resistance welding power supply A control device having a single static converter incorporating a rectifier and stabilizer block and a transistorized inversion block, the output signal of which is controlled by an amplitude and frequency regulator in response to a feedback signal taken ... | 01/26/1988 |
| 4709132 | Saturation monitoring arrangement and method of control for a frequency-converter welding deivce A measuring winding (208) which is connected to a signal frequency generator is additionally disposed on the core (206) of a welding transformer (TR2). A voltage depending on the state of saturation of the core (206) is tapped off at the measuring winding... | 11/24/1987 |
| 4684778 | Resistance spot welding gun and transformer assembly An assembly is provided for mounting on an end of a robot arm actuator as an integral spot resistance welding gun and transformer unit. A gun slide support bracket is connected to the transformer and serves to provide a mount for a sliding gun cylinder ha... | 08/04/1987 |
| 4682000 | Welding transformer and rectifier assembly The specification discloses a lightweight, compact welding transformer particularly well suited for robotic applications. The transformer includes coplanar secondary pads, a parallel common bus, and a secondary coil having turns each including a first end... | 07/21/1987 |
| 4577085 | System of transformers for a welding apparatus A transformer system for resistance welding intended for installation on robotic devices comprises an auto transformer having a tap selection switch connected through electrical conductors to an isolation welding transformer located at the end of the robo... | 03/18/1986 |
| 4571669 | Transformer with rectifier A transformer with a rectifier is disclosed, wherein a transformer main body, having therein a primary coil and a secondary coil, is provided at its front surface with a secondary electrode plate connected to the secondary coil, and to secondary electrode... | 02/18/1986 |
| 4559438 | Welding gun apparatus A welding gun apparatus having a gun bracket, a pair of arms pivotally mounted on the bracket, a transformer mounted on the bracket, and a pressure applying mechanism on the bracket for opening and closing the gun arms; characterized in that the gun brack... | 12/17/1985 |
| 4544821 | Welding apparatus using transformer with movable secondary and its method of manufacture and use A welding apparatus includes an improved transformer having a U-shaped secondary winding movable therein and guided by means external to the transformer. One leg of the U-shaped winding is flexibly connected to a first welding electrode carried by the pis... | 10/01/1985 |
