Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 7518083 | Spot-welding tool A spot-welding tool having at least one electrode for resistance welding of workpieces such as metal sheets. The spot welding tool has a pressure element for holding down the workpieces arranged on the electrode in a region of the electrode cap to prevent process-de... | 04/14/2009 |
| 7435924 | Drive device for welding tongs A drive device for a pair of welding tongs having a pair of limbs, is arranged between the adjusting ends of the limbs, located opposite to the welding electrodes, for adjusting between a welding position and a standby position. In order to reduce its length, provid... | 10/14/2008 |
| 7420137 | Method of open and/or closed-loop control of the movement of welding tongs A method for open or closed-loop control of welding tong movement utilizes a welding tong drive having a primary and a secondary drive device. The primary drive device moves two welding tong limbs with welding electrodes toward a welding object from opposite sides. ... | 09/02/2008 |
| 7173210 | Spot welding gun and a gun accessory A spot welding rod for resistance welding of object comprises a rod which is moveable axially, and two electrode arms provided with electrodes, wherein the electrodes face towards each other and the welding gun is adapted to press together objects to be welded locat... | 02/06/2007 |
| 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 |
| 7126084 | Welder A portable welder includes a welder housing. The housing has front and rear vertical end surfaces and left and right side surfaces. The housing further has a horizontal top surface extending forward from the rear surface. An inclined surface faces upward and forward... | 10/24/2006 |
| 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 |
| 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 |
| 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 |
| 6875945 | Welding tongs A pair of welding tongs includes two moveable tong arms, with each tong arm including a first arm element with an electrode, a second arm element, and a connecting element disposed between the first and second arm elements, whereby the connecting elements of the ton... | 04/05/2005 |
| 6723944 | Pinch weld gun A pinch type weld gun wherein the weld arms are pivotally mounted on the frame structure via a ball bearing structure including annular members of insulative material positioned in apertures in the weld arms, inner races fixedly mounted on a common pivot pin, outer ... | 04/20/2004 |
| 6706990 | Resistance welder multi-purpose attachment A device for use in combination with a hand held resistance welder to allow for insertion of an elongated portion of metal between two electrodes for welding hard to reach areas. The device features a mount to attach the device to a conventional hand held resistance... | 03/16/2004 |
| 6252193 | X type electric welding machine An X type electric welding machine with an electrode pressing force that is not susceptible to the wear of electrodes or variation of deflection of gun arms which varies every pressing force. An accurate electrode pressing force can be obtained for an ele... | 06/26/2001 |
| 6072146 | Resistance welding gun with on-board memory A resistance welding device having a welding current source, a control and/or regulating device for regulating the welding current, and at least one set of interchangeable welding guns on which welding electrodes are mounted in such fashion that they can ... | 06/06/2000 |
| 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 |
| 5928531 | Motor-driven resistance spot welding machine A motor-driven resistance spot welding machine includes: a drive rod having an electrode tip on an end thereof and making a linear motion; a linear guide for guiding the linear motion of the drive rod, the linear guide including a bearing; and a reduction... | 07/27/1999 |
| 5911889 | Method of removing damaged crystal regions from silicon wafers A method is provided to remove crystal regions from silicon wafers which are damaged as a consequence of mechanical machining of the silicon wafers. The silicon wafers are pretreated with an aqueous solution containing hydrogen fluoride. Then the wafers a... | 06/15/1999 |
| 5750953 | Motor-driven X-type resistance spot welding gun A motor-driven X-type resistance spot welding gun. A servo-controlled motor torque is converted into force to drive gun arms and into electrode force by using a reduction gear without converting rotational output of the motor into rectilinear motion. The ... | 05/12/1998 |
| 5739499 | Weld gun counterbalance apparatus A pair of tongs position the first and second electrodes with respect to the workpiece while the tongs rotate with respect to one another about a pivot axis. A counterbalancing mechanism balances the first and second electrodes when in or in close proximi... | 04/14/1998 |
| 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 |
| 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 |
| 5247157 | Apparatus for developing heat within conductive materials using heat-resistant ribbon heaters An apparatus for electrically heating an electrically conductive workpiece by passage of electric current therethrough includes a pair of hinged levers, each having a handle end and a jaw end. The jaw end of each lever is provided with a refractory metal ... | 09/21/1993 |
| 5157234 | C-type welding gun robot holding apparatus A C-type welding robot gun holding apparatus having a pressure cylinder which is short in the longitudinal direction thereof and a welding robot gun which is low in height. The C-type welding robot gun holding apparatus comprises an L-shaped bracket fixed... | 10/20/1992 |
| 5107095 | Clam shell heater employing high permeability material A connector which acts upon itself contains a fusible bonding material the connector forming a part of a temperature autoregulating electrical heater whereby upon application of a generally constant a.c. current to the heater, the temperature of the heate... | 04/21/1992 |
| 4825031 | Weld gun control A weld gun assembly including a support structure; a pair of arm members pivotally mounted intermediate their ends on the support structure on a common pivot axis; a weld tip at one end of each arm member; an air cylinder interconnected between the other ... | 04/25/1989 |
| 4810849 | Weld gun control A weld gun assembly including a support structure; a pair of arm members pivotally mounted intermediate their ends on the support structure on a common pivot axis; a weld tip at one end of each arm members; an air cylinder interconnected between the other... | 03/07/1989 |
| 4771160 | Welding tongs Welding tongs for dot or spot welding having two arms which are disposed without crossing relationship and carrying weld electrodes respectively on one end. The arms are made of flat, spaced bars, and a substantially flat spacing member made of an elastic... | 09/13/1988 |
| 4703158 | High frequency welding system A high frequency resistance welding system having a pair of jaws which are pivotally mounted together and are adapted to clampingly engage the work to be welded therebetween. Each jaw has two arms and each arm has a welding tip which engages the work. The... | 10/27/1987 |
| 4681999 | Apparatus for welding dental elements A precision electric welding device is used for welding dental crowns and bridges in the mouth, the dental elements to be welded being made up of dentally suitable metals, especially of titanium and titanium alloys. The device comprises, in combination, a... | 07/21/1987 |
| 4681105 | Microsurgical tool A microsurgical pincette consists of two metallic arm members and a metallic connection member, rigidly fixing the two arm members one to each other at an end region of the arm members. To ensure an electric insulation between the two arm members, a part ... | 07/21/1987 |
| 4656327 | Spot welder with electrode clamp A portable spot welder includes a hand-held electrode clamp assembly. The hand-held clamp has a fixed electrode and a movable electrode adapted to be moved toward and away from the fixed electrode. A spring loaded toggle is used to pivot the movable elect... | 04/07/1987 |
| 4656336 | Electric work-in-circuit metal-bonding heating tool An electrical work-in-circuit heating tool for metal bonding especially in cramped locations where flame heating and tong-style tools are not usable. The tool comprises a hinged pair of spring-loaded arms having electrically insulating open-ended handles ... | 04/07/1987 |
| 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 |
| 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 |
| 4553021 | Pincer-gun for electrically heating metal hinges of thermoplastic eyeglass frames A manually operated pincer-gun utilizing electric current for heating metal hinges of a thermoplastic eyeglass frame during a repair operation includes a pair of electrically insulative hand grips, each operatively connected to an arm having an electrical... | 11/12/1985 |
| 4551605 | Gun arm apparatus for resistance welding gun The present invention is directed to a gun arm for a resistance welding gun. The gun arm comprises a main body, an electrode holder mounted on the front portion of the main body and a support member fixed to the rear portion of the main body. The main bod... | 11/05/1985 |
| 4531041 | Spot welding gun A spot welding gun adapted for use in robotic welding in which the electrode holding arms of the gun are each turnably journalled on an attachment means. One of the electrode holding arms or an operating lever thereof supports a cam member with a cam surf... | 07/23/1985 |
| 4525618 | Resistance welding apparatus Apparatus for resistance welding is provided. The apparatus includes a transformer, to an output face of which resistance welding electrode holders are connected. The output face has two terminal blocks with threaded openings to receive fasteners for seve... | 06/25/1985 |
