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| Number | Title | Issue Date |
| 7670441 | Method for preventing air pollution using a mobile processing enclosure A method of processing materials at multiple work sites that prevents contamination of the atmosphere. The method includes providing a plurality of work sites containing workpieces, positioning a track connecting the sites, providing a mobile system comprising an en... | 03/02/2010 |
| 7641741 | Precision notch machining fixture and method A fixture includes an enlarged plate having slots in an upper surface, and support members are secured to the plate at the slots. The fixture is utilized to machine parts that are initially flame-cut from a large plate/sheet of hot-roll steel. A plurality of notches... | 01/05/2010 |
| 7431776 | Slag-removal system and method in a cutting table A slag-removal system for a cutting table includes a pair of drive members arranged in spaced endless loops extending parallel to a longitudinal direction, with a slag plow connected between the drive members, each loop having a lower run and an upper run spaced abo... | 10/07/2008 |
| 7143815 | Liquid cooling device A liquid cooling device includes a casing (10) having a container (14) for accommodating liquid therein, and a liquid inlet port (18) in communication with the container (14). A funnel-shaped channel is defined in the liquid inlet port ( | 12/05/2006 |
| 7045022 | Removal of adherent molten metal from surfaces The present invention provides a method and process for removing adherent molten metal from a surface by applying a non-wetting agent for the metal to the surface or to the adherent molten metal. The non-wetting agent may be a pressurized fluid or applied by a press... | 05/16/2006 |
| 7007737 | Slab handling apparatus A slab handling apparatus comprising a foundation structure, a plurality of longitudinally spaced buffer members positioned on the foundation structure, and a plurality of longitudinally spaced roller assemblies connected to the respective buffer members with a lost... | 03/07/2006 |
| 6805832 | Thermite torch cutting nozzle An improved nozzle for thermite cutting torches provides an elongated nozzle dimensioned and configured to direct a maximized flow of cutting flame to the desired cutting location on a workpiece. The nozzle includes an exterior wall defining the nozzle face having a... | 10/19/2004 |
| 6793831 | Microlamination method for making devices A method for fabricating devices in a pre-assembled state comprising forming plural laminae, registering the laminae, and bonding the laminae one to another is described. The plural laminae contain the substructures and structures of the device. The substructures ar... | 09/21/2004 |
| 6786979 | Method and apparatus for cutting steel to reduce slag adherence A steel cutting apparatus includes a cutting torch that is moved in an arcuate path for guiding the cutting torch so that a cutting flame of the cutting torch is always aimed at a bottom corner of the steel at the side where the cutting process begins. Molten steel ... | 09/07/2004 |
| 6582529 | Arrangement for seam preparation The unique in the construction is a number of important components and parts: a) the plate holder in molded aluminium; its double function and shaping in order to be able to be used as both a holder for plates and also serve for transfer of the circular m... | 06/24/2003 |
| 6440229 | Lower pre-heat block for use in metal scarfing apparatus A lower pre-heat block assembly (9) for use with a metal scarfing apparatus (5) is disclosed. The lower pre-heat block assembly has a lower block (38) and an extension (39) engaged upon and in overlying relationship with a front face (46) of the lower blo... | 08/27/2002 |
| 6368549 | Metallurgical vessel Disclosed is a metallurgical vessel, in particular a converter for treating liquid molten metals, in particular steel, formed of a refractory lining and a supporting metal shell that surrounds the refractory lining. The vessel is composed of welded togeth... | 04/09/2002 |
| 6203629 | Process for cutting coked metal molded parts A process for cutting coked metal includes cutting with a flame or by electrowelding after the coked metal has been heated sufficiently to relieve stresses in the metal.... | 03/20/2001 |
| 6183569 | Cutting torch and associated methods An apparatus is disclosed for cutting target material which includes a housing having an inner cavity and an elongated nozzle extending from the inner cavity to communicate with the exterior of the housing. The apparatus is provided with a charge for gene... | 02/06/2001 |
| 6068001 | Process for stainless steel pickling and passivation without using nitric acid Process for stainless steel pickling consisting in placing the material to be treated in a bath kept at a temperature ranging from 30° C. to 70° C. and containing: a) HCl b) Fe3+ c) HF d) emulsifiers, wetting agents, polishing agents, acid attack ... | 05/30/2000 |
| 5944915 | Cutting nozzle assembly for a postmixed oxy- fuel gas torch A novel cutting nozzle assembly for a postmixed oxygen-fuel gas torch is disclosed. The nozzle assembly includes a cylindrical shroud which surrounds and extends away from the gas discharge orifices in the gas discharge end of the cutting nozzle. The cyli... | 08/31/1999 |
| 5922144 | Accelerated steel removal process A method for cutting steel in which an operator uses high pressure propane and oxygen. The operator heats the steel locally until it is molten, positions a cutting torch with a high angle of incidence relative to the molten steel, and then blasts high pre... | 07/13/1999 |
| 5882437 | Oxy-fuel cutting torch head seat insert and method of use A molded, non-metallic insert is disclosed that is of a form which replicates the seat configuration of the oxy-fuel cutting torch into which it is intended to be inserted. The insert material is compressible and resilient and allows a cutting tip, withou... | 03/16/1999 |
| 5792281 | Post-mixed cutting torch having a pilot mode and method of operating same A post-mixed cutting torch selectively operable in a pilot mode and a cutting mode is provided by the present invention. The control body includes a fuel passage and an oxygen passage which is divided into a preheat oxygen supply branch and a cutting oxyg... | 08/11/1998 |
| 5733385 | Blade for a flail type brush cutting machine A blade for a flail type brush cutting machine. The blade is torch cut or cast from thick metal in a generally L shape to have any desired angle between its stem and floor, in the preferred embodiment the angle is ninety degrees to insure a close cut of b... | 03/31/1998 |
| 5688339 | Oxy-fuel flame impingement heating of metals Heating metal articles by direct surface impingement of an oxy-fuel flame without causing damage, or surface melting of the articles being heated. Flame contact is cycled to achieve maximum allowable rate of heat introduction thereby substantially reducin... | 11/18/1997 |
| 5458696 | Process for cutting blocks of metal A process for cutting very large solidified pools of metal and metallic structures by flame cutting by means of an improved burning bar is described. The cutting is conducted by a hot flame composed of very hot high pressure oxygen exiting from a burning ... | 10/17/1995 |
| 5391237 | Method of manufacturing a metal workpiece by oxygen cutting, oxygen-cutting device and metal workpiece obtained The workpiece is obtained by cutting a metal product by oxygen cutting. An oxygen cutting jet is sent onto a preheated cutting zone of the product. A peripheral sleeve of additional gas is formed around the oxygen cutting jet so as to send, into the cutti... | 02/21/1995 |
| 5350462 | Process for cutting large blocks of metal A process for cutting very large solidified pools of metal and metallic structures by flame cutting by means of an improved burning bar is described. The cutting is conducted by a hot flame composed of very hot high pressure oxygen exiting from a burning ... | 09/27/1994 |
| 5256212 | Method and apparatus for flame cutting a workpiece A method and apparatus are provided for cutting an elongate workpiece. A conveyor is provided for supporting the workpiece lengthwise along an X-axis in a mutually orthogonal X, Y, and Z-axis coordinate system. An X-axis positioner is provided for moving ... | 10/26/1993 |
| 5198039 | Apparatus and method for automatically positioning and operating non-contact tool holders Multiple cutting torches are automatically spaced along a torch bar operating parallel to a main beam spanning a cutting table with an apparatus and method allowing one or all of the cutting torches to be stored completely outside the cutting table when n... | 03/30/1993 |
| 5196071 | Method and apparatus for dross free burning of slabs A method and torch-cutting apparatus for slabs to prevent dross from forming on the underside of the slabs in the area of a cut includes a device to be positioned beneath a slab. The device applies a tight clamping pressure to the underside of the slab in... | 03/23/1993 |
| 5196072 | Method and apparatus for controlling metal oxide fume generation during subdivision of a body containing metal values A method and apparatus are disclosed for controlling metal oxide fume generation during the oxygen-induced subdivision into smaller physical units of a body containing metal values in a control gas-enriched oxygen environment in the absence of a fuel gas.... | 03/23/1993 |
| 5102473 | Process and device to transversely cut metal workpieces Metal pieces such as blooms, continuously cast billets and cogged ingots, are cut by a deep-frozen, liquid cutting medium, in particular liquid oxygen, exiting from a nozzle at high pressure. The workpiece is moved in the longitudinal direction and the no... | 04/07/1992 |
| 4995918 | Process and device for autogenous cutting with liquid oxygen In autogenous cutting oxygen in liquid form is put under high pressure and flows to the cutting site through a liquid jet cutting nozzle. An increase in the cutting speed and in the cutting quality level is achieved in that the super-cooled liquid oxygen ... | 02/26/1991 |
| 4953358 | Cooling device for liquefied gas A cooling device for cooling a liquefied gas having a low boiling point includes two cooling gas containers connected to each other by vacuum-insulated cooling-line segments. The liquid-gas line runs continuously through the cooling-line segments and the ... | 09/04/1990 |
| 4923527 | Apparatus and method for slag-free cutting of billets and the like A billet cutting apparatus of the type including an oxy-fuel cutting torch includes a slag removal nozzle operative simultaneously with the cutting torch to direct a jet of oxygen along the lower edge of the billet to remove slag beads tending to form the... | 05/08/1990 |
| 4916278 | Severing metal strip with high frequency electrical current A method of severing a metal piece into parts in which electrical contacts engage the piece at the end of the severing line and high frequency electrical current is fed to the contacts for the length of time required to at least significantly reduce the t... | 04/10/1990 |
| 4826541 | Method of thermal deburring of metal parts A method of thermal deburring of metal parts which is carried out in a chamber in two stages. The chamber is initially filled with a mixture of a combustible gas and air, the amount of each component in the mixture and the pressure thereof being dependent... | 05/02/1989 |
| 4765846 | Process for autogenic flame cutting with oxygen A process for autogenic flame cutting with oxygen includes bringing the oxygen while in the liquid state to a high pressure and feeding the oxygen to the cutting location via a liquid jet cutting nozzle.... | 08/23/1988 |
| 4559890 | Mooring release apparatus and method An apparatus and method having particular utility in quickly releasing the moorings of large vessels and offshore platforms. The preferred embodiment of the apparatus comprises a pair of pyrotechnic cutting torches disposed in a housing included as a stru... | 12/24/1985 |
| 4455176 | Post-mixed oxy-fuel gas cutting torch and nozzle and method of oxy-fuel gas cutting A combination cutting torch and nozzle assembly for post-mix oxy-fuel gas cutting using two separate annular steams of preheat oxygen gas surrounding the fuel gas stream with the inner annular oxygen stream directed to impinge the fuel gas stream very clo... | 06/19/1984 |
| 4278478 | Method of stack cutting A stack of edge aligned, thin metal sheets pressed into tight face-to-face engagement between rigid upper and lower plates, and a series of closely spaced peripheral welds from upper to lower plates secures the stack together for torch cutting predetermin... | 07/14/1981 |
| 4173499 | Method of operating a cutting burner A method of operating a metal-cutting burner in which the cutting oxygen is supplied through a central passage to a cutting nozzle and is enveloped in an oxygen curtain which is controlled so that the flow rate of oxygen to the curtain corresponds to 5 to... | 11/06/1979 |
| 3989479 | Gaseous fuel mixture A gaseous fuel for use in heating, hardening, welding, cutting, and other working of metals comprises a mixture of about 80 to 82 per cent propane, or a propane-butane mixture, about 15 to 17 per cent propylene oxide, and about 2 to 4 per cent methanol. T... | 11/02/1976 |
