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| Number | Title | Issue Date |
| 7956308 | Weld gun control system A system and method for controlling a piston-cylinder assembly of a welding apparatus, the piston-cylinder assembly including a plurality of pressure chambers, wherein the piston-cylinder assembly is operatively coupled to at least one welding electrode of the weldi... | 06/07/2011 |
| 7718916 | Low impact spot welding cylinder using dual pistons A weld cylinder having a dual piston arrangement is provided. The cylinder has a movable retract piston assembly with the piston arranged within the retract piston assembly. The piston supports a rod that is movable between home, intermediate, work, and advanced wor... | 05/18/2010 |
| 7714247 | Low impact spot welding cylinder using single piston A weld cylinder having a single piston arrangement is provided. The cylinder has a movable retract piston assembly with the piston arranged within the retract piston assembly. The piston supports a rod that is movable between home, intermediate, work, and advanced w... | 05/11/2010 |
| 7301118 | Welding gun with controller and method for using same A welding gun assembly including a housing that defines a first chamber and a second chamber. The assembly also includes a first piston moveably disposed in the first chamber and a second piston moveably disposed in the second chamber. The assembly includes an inten... | 11/27/2007 |
| 7291801 | Electrode for projection welding In an electrode for projection welding, an end cover (10) of metal having a through hole (19) is attached to the end of a main body (6) of metal having a cylindrical shape, a guide sleeve (12) of insulation material is disposed in the mai... | 11/06/2007 |
| 7223933 | Low impact spot welding cylinder with single piston A weld cylinder having a single piston arrangement is provided. The cylinder has a movable retract piston assembly with the piston arranged within the retract piston assembly. The piston supports a rod that is movable between home, intermediate, work, and advanced w... | 05/29/2007 |
| 7214902 | Low impact spot welding cylinder with dual pistons The present invention provides a weld cylinder having a dual piston arrangement. The cylinder has a middle separator separating the cylinder into two cavities. A retract piston assembly is arranged within one cavity. One of the pistons is arranged in the retract pis... | 05/08/2007 |
| 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 |
| 7078999 | Inductor and method for producing the same A lamination ceramic chip inductor includes at least one pair of insulation layers; and at least one conductive pattern which is interposed between the at least one pair of insulation layers and forming a conductive coil. At least one conductive pattern includes a c... | 07/18/2006 |
| 7078648 | Curved electrode for welding A curved electrode includes an installing portion to be installed in an electrode holder, an offset portion by which the offset amount is obtained, and a tip portion which comes into contact with the material to be welded W, the portions being formed separately and ... | 07/18/2006 |
| 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 |
| 7060929 | Sheet-to-tube resistance spot welding using servo gun A method of spot welding a sheet overlapped to a tube with a servomotor-driven electrode applying a clamping force to the sheet. Over a first clamping time interval, the clamping force is increased to a first force level, at which point a welding current is applied ... | 06/13/2006 |
| 7038591 | Apparatus for testing and marking workpieces A workpiece testing and marking system includes an apparatus for testing a workpiece and for selectively generating a signal that is representative of a result of the test. The system also includes a marker that is adapted to provide a visual indication on the workp... | 05/02/2006 |
| 7019250 | Quick change device for mounting an actuator to a resistance welding gun A quick change device has a mounting member for mounting an actuator to a resistance welding gun by headed fasteners. The mounting member has several keyhole type apertures arranged in a circle. The fasteners extend through the narrow portions of the keyhole type ap... | 03/28/2006 |
| 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 |
| 6914510 | Inductor and method for producing the same A lamination ceramic chip inductor includes at least one pair of insulation layers; and at least one conductive pattern which is interposed between the at least one pair of insulation layers and forming a conductive coil. At least one conductive pattern includes a c... | 07/05/2005 |
| 6911887 | Inductor and method for producing the same A lamination ceramic chip inductor includes at least one pair of insulation layers; and at least one conductive pattern which is interposed between the at least one pair of insulation layers and forming a conductive coil. At least one conductive pattern includes a c... | 06/28/2005 |
| 6911888 | Inductor and method for producing the same A lamination ceramic chip inductor includes at least one pair of insulation layers; and at least one conductive pattern which is interposed between the at least one pair of insulation layers and forming a conductive coil. At least one conductive pattern includes a c... | 06/28/2005 |
| 6909350 | Inductor and method for producing the same A lamination ceramic chip inductor includes at least one pair of insulation layers; and at least one conductive pattern which is interposed between the at least one pair of insulation layers and forming a conductive coil. At least one conductive pattern includes a c... | 06/21/2005 |
| 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 |
| 6907318 | Multi-station robotic welding assembly A multi-station robotic welding assembly includes a mounting platform, and a plurality of robots attached to the mounting platform and located in respective weld stations. Each of the robots includes an elongated movable arm and wrist. A welding torch is attached to... | 06/14/2005 |
| 6633015 | Soft-touch pneumatic drive unit A soft-touch pneumatic drive unit for welding is provided. The drive unit includes a first section, a second section, and a third section. A piston rod extends substantially throughout these sections and contains a drive piston in the second section and a... | 10/14/2003 |
| 6624378 | Resistance welding A method and apparatus for resistance welding of objects (39) by a spot welding gun which has a C-shaped arm (9), a front electrode (11), a back electrode (13) and a pneumatic cylinder (21). The back electrode is axially moveable a limited distance by the... | 09/23/2003 |
| 6294750 | Method and apparatus for automatically adjusting air pressure in a pneumatic weld head A pressure regulator system for a pneumatically- or hydraulically-actuated weld head. The weld head includes a switching valve comprising several ports: an inflow port attached to a source of pressurized gas, preferably air; an exhaust port; a first line ... | 09/25/2001 |
| 6268581 | Seam welding machine A plurality of pistons are disposed in series in a circular electrode pressure cylinder and each of the pistons is separated. During low pressure output only one piston is used so that the friction force of the other pistons is not transmitted.... | 07/31/2001 |
| 6198065 | Resistance welding process and device A resistance welding process in which the welding electrodes are moved at least via a wording piston-cylinder unit, wherein before the start of the welding process, the welding electrode is in a ready position in which it gently touches the workpiece or t... | 03/06/2001 |
| 5958262 | Equalizing mechanism for robotically carried spot weld guns A spot welding apparatus having a welding gun with movable and fixed electrodes carried on an articulating wrist, the apparatus comprising: a) a robotically actuated articulating wrist carrying the gun for movement to and from a welding position for a wor... | 09/28/1999 |
| 5954976 | Method and apparatus for automatically adjusting air pressure in a pneumatic weld head A pressure regulator system for a pneumatically- or hydraulically-actuated weld head. The weld head includes a switching valve comprising several ports: an inflow port attached to a source of pressurized gas, preferably air; an exhaust port; a first line ... | 09/21/1999 |
| 5948284 | Equalizing cam rocker fixture assembly for a resistance welding gun An apparatus for contacting and applying a force to opposite sides of a workpiece, such as a resistance welding device adapted for use on an automated assembly line. The apparatus is configured to be extremely rigid to ensure accurate movement and positio... | 09/07/1999 |
| 5895584 | Movable electrode structure of resistance welding apparatus for nut A guide pin of a movable electrode is inserted into a hole of a nut fed to an intermediate position between a fixed electrode and the movable electrode, and the movable electrode is then moved down together with the nut to position the nut on a portion to... | 04/20/1999 |
| 5831234 | Spot welding machine In opposition to a lower electrode (31) fixed to a frame (3), an upper electrode (29) is carried by an upper pressing base (23), which is engaged with a vertical guide rail (25) and joined by a resilient slide mechanism to a piston rod (35L) of a hydrauli... | 11/03/1998 |
| 5789719 | Method and apparatus for electrical resistance spot welding An improved welding apparatus and method of use including a pair of opposed electrodes mounted on arms which are fixed against outward displacement during the application of the welding current. One of the arms includes a cylinder for moving an electrode ... | 08/04/1998 |
| 5750952 | Welding gun with anti-rotation cylinder and internal proximity switch A welding gun that prevents rotation of the electrode, including a cylinder and a reciprocating piston assembly having a pair of pistons. In addition to the conventional connecting rod, the pistons are interconnected by an anti-rotation rod radially offse... | 05/12/1998 |
| 5731563 | Copper core weld gun A copper core weld gun assembly is provided with a substantially omega (Ω) shaped cross-section taken through each arm of the assembly. Concentric copper tubes are provided to carry cooling water and electric current to the electrodes of each arm. Specia... | 03/24/1998 |
| 5705783 | Copper core weld gun A copper core weld gun assembly is provided with a substantially omega (Ω) shaped cross-section taken through each arm of the assembly. Concentric copper tubes are provided to carry cooling water and electric current to the electrodes of each arm. Specia... | 01/06/1998 |
| 5705782 | Internal coil spot welding device A spot welding device to secure the inner end of a coil of steel to itself to prevent uncoiling. The welding device is carried on an articulated support arm assembly that allows for positioning the welder within the coil on a gimble axis mount for proper ... | 01/06/1998 |
| 5632911 | Apparatus for aiding in the manipulation of a tool Apparatus for aiding in the manipulation of a tool by supporting the weight thereof is designed particularly for a resistance welding tool. The apparatus includes an overhead support, a curved bar hanging below the support, a trunnion connected to a lower... | 05/27/1997 |
| 5545872 | Pressure controller and pressure control method for resistance welder An improved tip dressing process is provided wherein the pressure between the electrode tip of a resistance welder and the cutter of a tip dresser is varied during the tip dressing process. A pressure controller is also provided for controlling the pressu... | 08/13/1996 |
| 5525774 | Method and apparatus for fusing lead wires of coils to terminals A fusing electrode is mounted on a vertically movable carriage which is raised by a first air actuator and lowered by gravity into engagement with a commutator tang. During a fusing cycle, different pressures are applied between the fusing electrode and t... | 06/11/1996 |
| 5504297 | Apparatus for electrical resistance spot welding An improved welding apparatus and method of use including a pair of opposed electrodes mounted on arms which are fixed against outward displacement during the application of the welding current. One of the arms includes a pneumatic cylinder for moving an ... | 04/02/1996 |
