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| Number | Title | Issue Date |
| 7435373 | Apparatus and method for thermal de-burring of slotted well liners A method and apparatus for removing burrs from inside slotted metal liners exposes the burrs to a high-intensity gas flame that effectively oxidizes or incinerates the burrs, without inducing undesirable temperature levels in the parent metal of the slotted liner. T... | 10/14/2008 |
| 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 |
| 5747771 | Method and apparatus for forming blind slots including laser melting and gas vortex A method of machining a blind slot 3 in a workpiece 2 comprises heating the surface of the workpiece 2 above its melting temperature with, for example, a beam of laser energy and directing at least two gas streams 5, 6 such that they together with the bas... | 05/05/1998 |
| 5304256 | Scarfing method A thermochemical scarfing method is disclosed which allows a greater diagonal standoff distance from the metal workpiece during preheating. The method includes preheating the end of the metal workpiece, and then scarfing the workpiece by directing a scarf... | 04/19/1994 |
| 4615377 | Method of striping hot steel slabs An improved method of and apparatus for striping hot steel slabs on the runout table of a continuous caster employs a torch support and drive mechanism adapted to support a scarfing torch for movement at a uniform rate across the surface of a slab maintai... | 10/07/1986 |
| 4441935 | Apparatus and method for scarfing An inspection track is scarfed by moving a burner across a flat surface of a steel slab, particularly a slab of ductile steel of deep-drawing quality, to enable sub-surface inspection of the slab. To achieve accurate control of the depth of the track, the... | 04/10/1984 |
| 4405383 | Method and apparatus for a surface stripping treatment of objects consisting of iron with a high carbon content The invention relates to the surface stripping treatment of objects consisting of iron with a high carbon content, the surface stripping treatment being carried out by means of a flame which is directed at the surface and which is formed by the combustion... | 09/20/1983 |
| 4373969 | Method of removing cracks, and multiple-shape torch for carrying out the method The invention concerns a method of selective crack removal from ingots and slabs, and the torch for carrying out the method. The method comprises burning surface impurities with a jet of oxygen, the strength and shape of which vary continually according to the... | 02/15/1983 |
| 4287005 | Instantaneous scarfing by means of a pilot puddle A method for spot scarfing a metal workpiece comprising continuously producing a pilot puddle on the surface of the workpiece, spreading the pilot puddle to a preselected width with a high intensity stream of oxygen gas, and impinging a stream of scarfing... | 09/01/1981 |
| 4266989 | Cutting tool guiding system for metal cutting machines A cantilevered transverse arm is mounted for movement along both a longitudinal and transverse axis. The outer end of the arm is adapted to be disposed over a metal slab to be cut and carries a tool assembly which is adjustable thereon. A guiding assembly... | 05/12/1981 |
| 4243436 | Instantaneous scarfing by means of a pilot puddle A process for spot scarfing the surface of a metal workpiece comprising: (a) impinging a stream of pilot oxygen gas upon a portion of the workpiece which is at least at its oxygen ignition temperature, said stream of pilot oxygen gas being narrower than the wi... | 01/06/1981 |
| 4161413 | Method and apparatus for producing a post-mixed, stabilized scarfing pre-heating flame A process for thermochemically scarfing a metal workpiece comprising: Preheating a spot on the surface of the workpiece where the scarfing reaction is to begin by directing a post-mixed preheating flame at the spot. The preheating flame is formed by: (a) disch... | 07/17/1979 |
| 4139757 | Method and device for igniting gas planing This invention relates to a method and a device for igniting a gas planing process. The method is based on applying heat to a workpiece by means of a movable heat source, which in principle has a point effect so that the heated or molten portion of the wo... | 02/13/1979 |
| 4115154 | Method and apparatus for producing a post-mixed, stabilized scarfing pre-heating flame A process for thermochemically scarfing a metal workpiece comprising: Preheating a spot on the surface of the workpiece where the scarfing reaction is to begin by directing a post-mixed preheating flame at the spot. The preheating flame is formed by: (a) disch... | 09/19/1978 |
| 4115151 | Method and apparatus for workpiece surface treatment The present invention relates to a method and an apparatus for treating the surface of a workpiece. The invention ensures correct working of the workpiece surface and renders an accurate control of the working place in question possible. The removal of wo... | 09/19/1978 |
| 4078950 | Spot scarfing nozzle for use in gang arrangement A scarfing nozzle and method for producing a fin-free scarfing cut at least as wide as the width of the nozzle. The method is characterized by directing a stream of oxygen at the spot to be scarfed from a scarfing nozzle which restricts the flow of oxygen... | 03/14/1978 |
| 4040871 | Method for producing an individual fin-free spot scarfing cut A method for producing an individual, fin-free, spot scarfing cut on the surface of a workpiece characterized by directing at the spot to be scarfed, which has first been brought to a molten state, an oxygen stream at an inclined angle to the work surface... | 08/09/1977 |
| 4038108 | Method and apparatus for making an instantaneous thermochemical start A method and apparatus for making an instantaneous thermochemical start on the surface of a metal workpiece. The method resides in the use of laser beam focused to a small spot to bring the ferrous workpiece to ignition temperature in combination with a h... | 07/26/1977 |
| 3966504 | Method and apparatus for thermochemical gas scarfing The present invention relates to a method and an apparatus for initiating and maintaining a thermochemical process of scarfing the surface of a workpiece to remove surface defects like, e.g., cracks, in which there is used a unit of torches, continuously ... | 06/29/1976 |
