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| Number | Title | Issue Date |
| 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 |
| 7067760 | Welding gun Spot welding gun, having a support, a lower half-gun and an upper half-gun articulated one to the other by a pin, mounted in an oscillating configuration with respect to said support and propping up corresponding welding arms, and a working cylinder including a body... | 06/27/2006 |
| 6927357 | Weld gun equalizer A weld gun having a linkage, which relates pivotal motion of a pair of laterally opposed facing electrodes of the weld gun in a predetermined manner. Based upon the predetermined motion of the electrodes a welding robot positions the electrodes of the weld gun on op... | 08/09/2005 |
| 6911616 | Weld gun assembly A weld gun for performing a welding operation on a workpiece includes a pair of opposing arms, at least one arm movable relative to the opposing arm to apply pressure to the workpiece during a welding operation. A pair of identical or mirror image side plates suppor... | 06/28/2005 |
| 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 |
| 6720517 | Resistance welding head and resistance welding apparatus and method using the head A resistance welding head carries out resistance welding while clamping spots are being welded by a pair of electrodes. The head is floated in a direction Y perpendicular to a direction X of juxtaposing the spots being welded. The pair of electrodes clamp the spots ... | 04/13/2004 |
| 6337456 | Welding machine and method for assembling same In a resistance welding machine, an arm including one electrode tip, a drive unit including a linear guide for driving another electrode tip corresponding to the one electrode tip, and a welding unit including a welding transformer for passing a secondary... | 01/08/2002 |
| 6204467 | Method and apparatus for resistive welding A method and apparatus for resistive welding using an electrode holder having an elongated cylinder. The cylinder has a closed end and an open end. The cylinder contains a moveable piston. The piston includes a compression surface and an end adapted to re... | 03/20/2001 |
| 6201206 | Method of detecting abrasion quantity of welding gun electrode and welding method A plate-shaped jig (9) is fixed between a fixed-side electrode (5) and a moving-side electrode (6). The end of an arm is set to move by an external force in the direction the moving-side electrode (6) moves, and then the moving-side electrode (6) is moved... | 03/13/2001 |
| 5988486 | Method of controlling electrode force of spot welding gun In a spot welding gun which is made up of a gun main body which is operated for equalization by a driving source, a stationary electrode tip which is immovable relative to the gun main body, and a movable electrode tip which is connected to a pressing sou... | 11/23/1999 |
| 5302550 | Method of bonding a microelectronic device A method for ball-bonding thin film structures. The bonding characteristics of a thin-film electrode structure are measured, before the actual bonding step, by pressing a ball (of a material similar to that of the bonding wire) against an electrode by a b... | 04/12/1994 |
| 5252801 | Fixed point welding gun A resistance welding gun which is adapted to prevent asymmetrical impacting of two or more metal sheets to be welded. The resistance welding gun includes a pair of rotatably connected arms, each of which has a corresponding working end and actuation end. ... | 10/12/1993 |
| 4940875 | Force limiting weld head A force limiting weld head (11) which includes a supporting structure (13), a pressure barrel (15) and an output member (17) mounted for movement on the supporting structure, a fixed electrode (19) mounted on the supporting structure, a movable electrode ... | 07/10/1990 |
| 4587394 | Device and method of welding nuclear fuel assembly structural elements Device and method for welding nuclear fuel assembly structural elements, comprising a receiving stand for the guide tubes and structural elements of the assembly, and a welding group having a carriage movable parallel to the guide tubes comprising at leas... | 05/06/1986 |
| 4352971 | Self-equalizing welding structure Self-equalizing welding structure and method. The structure comprises piston and cylinder structure held in a fixed support, including cylinder ends movable into and out of the opposite ends thereof, a welding electrode attached to one rod cylinder end on... | 10/05/1982 |
| 4149059 | Electrical multi-spot resistance welding machine The invention relates to electrical multi-spot resistance welding machine for the production of welded bar gratings produced by welding cross-bars into the narrow side of parallel, upright flat bars. Such a machine has a pressure-beam which is guided vert... | 04/10/1979 |
