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| Number | Title | Issue Date |
| 7754993 | Method for providing a dry environment for underwater repair of the reactor bottom head using a segmented caisson Welding repairs are performed in an underwater environment adjacent the bottom head of the nuclear reactor vessel. To provide a dry welding environment, segments of a lower caisson are passed through the core plate holes and assembled along the interior surface of t... | 07/13/2010 |
| 7399941 | Welding tool A welding tool for TIG arc welding, plasma welding or laser welding, including a welding head carrying a refractory electrode and surrounded by a skirt. The skirt is releasably fastened on the welding head and has a front portion which extends forwards and is shaped... | 07/15/2008 |
| 7374134 | Systems and methods for semi-permanent, non-precision inspace assembly of space structures, modules and spacecraft Methods and systems for assembling spacecraft in space are provided. A modular spacecraft comprises a plurality of spacecraft modules, wherein each spacecraft module includes one or more of bonding posts and receiving plates mounted to an exterior surface each space... | 05/20/2008 |
| 7341176 | Method of tying two or more components together Method of tying two or more components together using a fastener. Each component is provided with a hole and the components are placed so that the holes overlap one another in order to receive the fastener in the holes. The fastener is placed in the holes and mechan... | 03/11/2008 |
| 7312416 | Apparatus and methods for underwater welding A lower housing having a lower chamber and a welding opening is fixed about an underwater weld site. The lower housing includes an upper opening, the lower housing being filled with water upon installation. A transport housing containing a welding unit in a dry stat... | 12/25/2007 |
| 7220935 | Welding torch and shield A welding torch (10) for welding on a component has an electrode (12) within a nozzle (14) through which a flow of gas passes. A shield (20) defines an enclosure (22) around the nozzle (14). Means are provided for supplying ... | 05/22/2007 |
| 7137306 | Apparatus for providing enhanced self-resistive specimen heating in dynamic material testing systems and accompanying method for use therein Apparatus and an accompanying method for use in a conventional dynamic material testing system to advantageously provide enhanced self-resistive specimen heating. Specifically, a fixture (400) is added to the system. The fixture has two supporting arms (20... | 11/21/2006 |
| 7129436 | Laminar-vortex welding chamber A welding chamber having a laminar-vortex inert gas flow is disclosed. The welding chamber comprises a transparent dome that covers an open top side of a rigid generally rectanguloid enclosure. The dome includes a one-way vent for discharging ambient air from within... | 10/31/2006 |
| 7119301 | Device for isolating a surface for welding A device (10) for isolating a surface for welding in an underwater location or in high fire risk areas. The device comprises a housing (27) which is arranged to be mounted on the surface and a sealing means (30) to provide a seal between the hou... | 10/10/2006 |
| 7107857 | Apparatus for an anvil system that provides enhanced self-resistive specimen heating when used in a dynamic thermo-mechanical material testing system Apparatus for use in a conventional dynamic material testing system to advantageously provide uniform self-resistive specimen heating with enhanced temperature uniformity. Specifically, an anvil stack (300) in an anvil assembly (200) has a foil interfa... | 09/19/2006 |
| 7087859 | Stick electrode A welding electrode comprising a metal core and a flux coating at least partially coated on an outer surface of said metal core, and also including a end coating material which at least partially inhibits porosity of a weld bead formed during the welding operation. | 08/08/2006 |
| 6994685 | Method and a device for creating a protecting atmosphere The invention refers to a method for creating a protecting atmosphere in a volume, including the steps of: providing a device, which is arranged to permit the supply of a gas and which includes at least a supply conduit including a discharge end and a porous body pr... | 02/07/2006 |
| 6894251 | Method for welding on stress-sensitive materials For stress-crack-sensitive materials, a weld pool is formed on a substrate. The weld pool is simultaneously plastically strained and cooled while the temperature of the hot metal weld pool lies substantially within a predetermined range in which hot cracking typical... | 05/17/2005 |
| 6783054 | System for controllably conducting welding operations adjacent flammable materials and method of welding adjacent flammable materials A system (10) for conducting welding adjacent flammable materials (12) on a platform (11) is disclosed having a chamber (13) defining an interior space (16). The system also includes a welding apparatus (48) operable within ... | 08/31/2004 |
| 6635842 | Electric arc equipment The invention relates to electric arc processes particularly for underwater use. Electric arc processes effected under water ordinarily operate at a voltage of 20 or 30 volts, with an open circuit of e.g. 50 volts, and are at a level that does not pose a ... | 10/21/2003 |
| 6564990 | Method of welding high chromium austenitic stainless steel pipe and shielding gas mixture for welding Stainless steels are welded using a shielding gas including 88 to 98.9 mole % Ar, 1 to 10 mole % H2, and 0.1 to 2.0 mole % CO2. The shielding gas permits low sulfur, high chromium, austenitic stainless steel pipes to be joined with w... | 05/20/2003 |
| 6563072 | Welding technique for forming passive chromium oxide film in weld and gas feed system for welding Welding of material such as a piping using ferrite system stainless steel, in which a back sealed gas used for conventional welding is switched from argon gas (or a hydrogen gas/argon gas mix) to an argon gas to which an oxidizing gas is doped at the time... | 05/13/2003 |
| 6559882 | Domestic appliance A domestic cooking or defrosting appliance including a heating region and a camera for obtaining images of food cooking or defrosting within the heating region, wherein the camera outputs video signals to a processor that drives a display means associated... | 05/06/2003 |
| 6518534 | Welding apparatus for forming chromium oxide passivated film at welded portion An improved method for welding and passivation forms a chromium oxide passivated film over the welded portion during the welding process. In a shielding step, a backshield gas, preferably argon, is flowed around the welding site. In a welding step, an arc... | 02/11/2003 |
| 6506995 | Conforming welding torch shroud A shroud for a welding torch includes a hydrophilic skirt supported by a frame. The skirt is soft and pliable when wet and is self protected from the heat of welding by the water absorbed therein. The frame supports the skirt around the weld site and perm... | 01/14/2003 |
| 6441334 | Gas shielded arc welding flux cored wire Realized is a welding wire containing flux used for a gas shielded arc welding of a direct current/positive polarity mode, with use of which a quantity of sputter generated is small, a good weldability is realized and a weld metal with an excellent toughn... | 08/27/2002 |
| 6417476 | Apparatus and methods for submerged processing of a grooved work surface using a movable gate A housing for an underwater processing device, for example, welding, includes a welding head movable laterally relative to the housing and the direction of the weld. At opposite ends, gates are provided having arcuate convex surfaces forming edge seals fo... | 07/09/2002 |
| 6373019 | Apparatus and methods for processing a submerged work surface An underwater exclusion device includes a housing for a welding torch having leading and trailing arrays of pivotal fingers for engaging in grooves along a work surface to exclude water from an exclusion area within the housing containing the welding torc... | 04/16/2002 |
| 6331688 | Use of a metal powder for surface coating by submerged arc welding The present invention concerns the use of a pre-alloyed atomised powder in combination with at least one melting electrode wire in the SAW method. The electrode wire is an unalloyed or low-alloy metal wire and the metal powder is a metal powder containing... | 12/18/2001 |
| 6255616 | Apparatus and methods for submerged processing of a work surface A housing for a processing device includes a plurality of independently extendible and retractable fingers for engaging the work surface. Gas pressure supplied within the housing drives the fingers into their extended positions and assists in excluding su... | 07/03/2001 |
| 6172320 | Welding method for forming chromium oxide passivated film at welded portion An improved method for welding and passivation forms a chromium oxide passivated film over the welded portion during the welding process. In a shielding step, a backshield gas, preferably argon, is flowed around the welding site. In a welding step, an arc... | 01/09/2001 |
| 6153847 | Welding member and welding method A water-repellent film is applied on to the surface of a welding member such as of a welding backing member disposed backside a joint defined between two mating welding bevels, a welding bevel of a base member to be welded, and a coated welding rod formed... | 11/28/2000 |
| 6124568 | Heating apparatus for a welding operation and method therefor A heating apparatus and method for welding a superalloy article. The apparatus and method of this invention provide for pre-weld and post-weld heat treatments to be performed on an article within the same enclosure in which the welding operation is perfor... | 09/26/2000 |
| 5981896 | Apparatus and method for creating dry underwater welds An apparatus for underwater welding has a housing and a diverter. The diverter is inside the housing and has an outer sheath and an inner sheath. A gap between the housing and diverter passes a screening fluid to form an outer screening jet that prevents ... | 11/09/1999 |
| 5932170 | Apparatus for the treatment of metallic workpieces Metal workpieces are subjected to laser treatment in a liquefied gas, by passing the laser beam through a layer of liquid nitrogen in direct contact with the metal surface to be treated, thereby creating an amorphous state.... | 08/03/1999 |
| 5916464 | Welding force feedback wire feed system A MIG and Flux Core wire feed and containment system for filler wire distribution for both manual and robotic underwater and terrestrial welding applications has a sensor feedback pressure sensor system that detects deflective and deformative pressures ac... | 06/29/1999 |
| 5852271 | Water exclusion device for underwater thermal processing A submersible thermal processing apparatus including a welding torch having an electrode, a housing and an inlet for pressurized gas; a shielding gas nozzle mounted to the torch housing and surrounding at least a portion of the electrode; and a fluid-perm... | 12/22/1998 |
| 5780804 | Apparatus and method for making structural fillet welds The apparatus of the invention forms a sealed pocket area which excludes water or other liquid fluent directly over a portion of an angled configuration that is to be welded, where the angled configuration is created by teeing two pieces of material toget... | 07/14/1998 |
| 5750954 | Water exclusion device for underwater welding A water exclusion device for underwater arc welding comprises a chamber having flexible gas permeable surface contact member at the lower end. A wire mesh material is the preferred gas permeable material.... | 05/12/1998 |
| 5736711 | Underwater arc-welding apparatus An improved underwater arc-welding apparatus that includes a handheld torch assembly connected to an housing that delivers electrical power, a pressurized shielding gas, and a consumable wire electrode to the site of the weldment. The housing is configure... | 04/07/1998 |
| 5719369 | Stress corrosion crack repair by plasma arc welding underwater welding Stress corrosion cracking damage to stainless steels and nickel base superalloys is repaired by underwater plasma transferred arc welding which under conditions which reduce residual tensile stresses in the weld and adjacent portions of the repaired struc... | 02/17/1998 |
| 5705786 | Underwater welding Persistent compressive stresses sufficient to suppress hot cracking, reheat cracking and stress corrosion cracking are developed in welds containing alloys of plural materials by quenching of the weld after onset of solidification but while the weld remai... | 01/06/1998 |
| 5698116 | Electric welding device using welding material supplied in a wet environment An electric welding device using welding or filler material supplied to a welding site located in a wet environment. The device provides for the supply of the welding material to the welding site in a water-free environment that extends up to the welding ... | 12/16/1997 |
| 5685771 | Enclosure for maintaining a controlled atmosphere around a work station An enclosure enveloping a work area with a controlled gaseous atmosphere. It is particularly useful as a welding enclosure for welding metals in a total atmosphere of inert gas. The enclosure consists of a basal portion which rests on a table or work benc... | 11/11/1997 |
| 5667133 | Method and apparatus for forming an oxide passivation film on a weld A welding method for forming an oxide passivation film having corrosion resistance and an extremely small emission quantity of an outgas during welding at a weld portion and portions nearby, and a process apparatus requiring an ultrahigh-clean atmosphere.... | 09/16/1997 |
