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| Number | Title | Issue Date |
| 5675056 | Incandescent waste disposal system and method An incandescent waste disposal system and method for the processing of waste and for rendering a hazardous component of the waste nonhazardous without discharge of harmful emissions are provided. The system includes a waste processing chamber, typically s... | 10/07/1997 |
| 5670065 | Apparatus for plasma treatment of fine grained materials "An apparatus for plasma treating fine-grained materials, having a receptacle that can be evacuated and that accepts and agitates the materials to be treated, and having an electromagnetic device that comprises an excitation device and electrodes and to a... | 09/23/1997 |
| 5667705 | Discharge chamber and method of manufacturing the same A discharge chamber wherein incomplete discharge arising from a discharge electrode surface condition is suppressed and a manufacturing method for the discharge chamber are disclosed. The discharge chamber includes a first substrate, a plurality of discha... | 09/16/1997 |
| 5653896 | Process for high quality plasma arc and laser cutting of stainless steel and aluminum Plasma arc or laser cutting uses a mix of reactive and reducing gas flows to cut sheets of stainless steel, aluminum and other non-ferrous metals. The reducing gas flow to the cut varies as a percentage of the total gas flow to maintain a reducing atmosph... | 08/05/1997 |
| 5626249 | Plasmalysis treatment method for waste matter A method for the treatment of waste matter by plasma action. A plurality of electrode structures are positioned to define a reaction zone associated with the inter-electrode space. The inter-electrode space is conditioned (as by preionizing) and a series ... | 05/06/1997 |
| 5614111 | Method for making metallized capacitor having increased dielectric breakdown voltage A metallized film capacitor in which the metallization is made as thin as possible in order to increase the dielectric strength of the film. In the industry, typical metallization thicknesses range from approximately 1-4 ohms/sq, however, the present inve... | 03/25/1997 |
| 5614110 | Varying protective gas composition between piercing and cutting with plasma torch The present invention comprises a plasma cutting method and a cutting apparatus in which switching can be effected between suitable flow rates of a protective gas at the time of piercing and at the time of cutting, and in which suitable compositions of th... | 03/25/1997 |
| 5611947 | Induction steam plasma torch for generating a steam plasma for treating a feed slurry Steam plasma reactor incorporating an induction steam plasma torch where superheated steam is generated and passed through an induction coil or coils to generate high temperature steam plasma for conversion and disposal of waste products such as low level... | 03/18/1997 |
| 5599469 | Plasma welding process In a plasma welding process, a voltage is applied between an electrode and an object to be welded so as to generate a plasma arc with a plasma gas directed through a torch to surround the electrode, and welding is performed using the plasma arc as a heat ... | 02/04/1997 |
| 5597497 | Switch mechanism for operating a plasma arc torch, other tools or weapons A switch mechanism with a safety member for operating a tool or a weapon which reduces the probability of inadvertent operation. The switch mechanism comprises a trigger and a safety member disposed adjacent to the trigger for preventing the trigger from ... | 01/28/1997 |
| 5595669 | Method of forming coupling diopters at the ends of optical fibers To enable surface tension forces to confer upon an optical fiber end (P1), a shape procuring good optical coupling the end is partially melted in an electric arc (ZC). To improve the reproducibility of this shape movement into the arc is achieved by a uni... | 01/21/1997 |
| 5591357 | Plasma arc cutting process and apparatus using an oxygen-rich gas shield A plasma arc torch has a secondary gas flow that is extremely large during piercing of a workpiece to keep splattered molten metal away from the torch and thereby prevent "double arcing". The secondary flow exits the torch immediately adjacent the transfe... | 01/07/1997 |
| 5562841 | Methods and apparatus for treating a work surface A work surface, e.g. an integrated circuit, is treated with a plasma jet. The work surface is shielded from an ambient medium by a shielding gas jet directed to create a shielded zone around the work surface, or which is blown over the work surface so it ... | 10/08/1996 |
| 5560844 | Liquid film stabilized induction plasma torch A liquid film stabilized induction plasma torch comprises a cylindrical torch body made of cast ceramic or polymer-matrix composite, a coaxial cylindrical plasma confinement tube mounted inside the torch body, a gas distributor head secured to one end of ... | 10/01/1996 |
| 5558786 | Process for high quality plasma arc and laser cutting of stainless steel and aluminum Plasma arc or laser cutting uses a mix of reactive and reducing gas flows to cut sheets of stainless steel, aluminum and other non-ferrous metals. The reducing gas flow to the cut varies as a percentage of the total gas flow to maintain a reducing atmosph... | 09/24/1996 |
| 5539176 | Method and apparatus of synthesizing diamond in vapor phase A DC plasma jet method enables us to synthesize diamond at a high speed by spraying an activated carbon-containing gas as a plasma jet to a substrate. Despite the high speed deposition, the method cannot synthesize a wide uniform diamond owing to the unif... | 07/23/1996 |
| 5532449 | Using plasma ARC and thermite to demolish concrete A plasma arc can be employed to demolish a concrete structure at a high efficiency, while preventing a secondary problem due to noise, flying dust and chips, and the like. The concrete structure can be demolished by melting a surface of the concrete struc... | 07/02/1996 |
| 5532447 | Method of cleaning an aluminum surface by plasma treatment A method of cleaning an aluminum surface includes treating the surface by cold plasma process employing a mixture of about 30 to 70 percent oxygen by volume and about 30 to 70 percent freon by volume and preferably about 40 to 60 percent by volume of each... | 07/02/1996 |
| 5528012 | Apparatus and method for starting a plasma arc treatment system An ignitable material is positioned in contact with a slag contained within a plasma arc treatment system having an electrode and an electrical ground. The slag is initially at a temperature below a conducting temperature at which the slag will conduct el... | 06/18/1996 |
| 5521351 | Method and apparatus for plasma surface treatment of the interior of hollow forms A plasma is generated within the interior of a hollow form held within a vacuum chamber enclosure by utilizing a radio frequency coil mounted within the vacuum chamber and defining a working volume which closely conforms to the shape of the hollow form. T... | 05/28/1996 |
| 5503725 | Method and device for treatment of products in gas-discharge plasma A method for treatment of products in gas-discharge plasma consists in that a two-step vacuum-arc discharge is initiated between an anode (3) and an integrally cold cathode (2), featuring a metal-gaseous step of plasma and a gaseous step of plasma. The ga... | 04/02/1996 |
| 5493117 | Apparatus and method for glow discharge treatment of a moving web using electrodes fitted into a single common socket and having end portions covered by electrically conductive shields Apparatus and method for glow discharge treatment of opposite surfaces of a moving web such as a plastic film or metallic sheet. The web moves in a vacuum housing between two rows of elongated electrodes arranged in a direction transverse to the direction... | 02/20/1996 |
| 5493094 | Preparation of fullerenes and apparatus therefor Fullerene-containing soot, is prepared by evaporating an electrically conductive carbon rod in an electric arc plasma sustained in a tubular evaporator between coaxially aligned carbon rods in a stream of inert gas flowing coaxially over the carbon rods a... | 02/20/1996 |
| 5486675 | Plasma production of ultra-fine ceramic carbides An apparatus and method for the synthesis of ultra-free (submicron) ceramic carbides in a thermal plasma torch reactor using primarily silica, boron oxide, titanium dioxide or other oxides as metal sources and methane as a reductant. A plasma torch operat... | 01/23/1996 |
| 5484978 | Destruction of hydrocarbon materials In the method of destroying hydrocarbons disclosed herein, a high temperature plasma is generated from an electrical discharge in a flow of hydrogen gas devoid of oxygen. The hydrocarbon to be destroyed is injected into the plasma thereby to decompose the... | 01/16/1996 |
| 5471031 | Chamber free plasma welding root side purging method and apparatus A method and apparati are presented for non-chamber root side purging in fusion welding of oxygen reactive metals which require that the molten weld zone and local solid areas of the weld seam remaining at high temperatures be shielded from normal atmosph... | 11/28/1995 |
| 5466905 | Low electric D.C., low time rate polarity reversing arc welding method Direct electric current arc welding between an electrode and a workpiece surface is accomplished in the electric current range of about 0.5-45 amps while reversing the polarities between the electrode and the workpiece surface at a low frequency rate in t... | 11/14/1995 |
| 5466906 | Process for coating automotive engine cylinders A method for coating the internal cylinder bores of a cast aluminum engine block comprising the steps of casting an engine block of aluminum alloy, thermally spraying a wear-resistant coating onto cylinder walls in the engine block by melting the tip of a... | 11/14/1995 |
| 5466907 | Process for coating the internal surfaces of hollow bodies A process of coating the internal surface of a hollow body by depositing a coating on a substrate having an external surface similar to the internal surface of the hollow body; inserting the coated substrate to mate within and contact the internal surface... | 11/14/1995 |
| 5453305 | Plasma reactor for processing substrates A plasma reactor and method for forming a dense plasma from a gas is described incorporating a housing, a gas inlet to the housing, a pump for evacuating the housing, a magnetic coil to generate a magnetic field in the housing, a radio frequency power sup... | 09/26/1995 |
| 5451738 | Plasma arc decomposition of hazardous wastes into vitrified solids and non-hazardous gasses For disposal of waste material including water, volatile components and vitrifiable components, the waste material is heated in a dehydrator to remove the water, heated in a high-temperature dryer to vaporize hydrocarbon liquids, and then fed to the focus... | 09/19/1995 |
| 5451740 | Convertible plasma arc torch and method of use A plasma arc torch is provided which is convertible in the field as to be able to operate in either a transfer arc mode or non-transfer arc mode. The plasma arc torch comprises a torch body having channels formed for flow of coolant and plasma gas therein... | 09/19/1995 |
| 5442153 | High velocity electric-arc spray apparatus and method of forming materials A high velocity arc spray apparatus includes a transferred-arc-plasma torch assembly which forms a transferred-arc column. A metal feedstock is fed into the transferred-arc column at an angle such that no portion of the metal feedstock is closer to the tr... | 08/15/1995 |
| 5436423 | Method and apparatus for continuously cutting parts from a coil of sheet metal A method and apparatus for automatically and continuously producing multiple blanks from a coil of sheet material with a minimum of scrap. The apparatus utilizes pinch rolls to advance and retract the sheet material from a coil, while simultaneously a cut... | 07/25/1995 |
| 5436425 | Method and apparatus for plasma cable cutting A method and apparatus area disclosed for utilizing a plasma cutting torch to severe the free ends of a post-tensioned cable embedded in a concrete body. The method and apparatus utilize a positioning element for interconnecting the head of a plasma cutti... | 07/25/1995 |
| 5420390 | Image heating apparatus using a microwave discharge plasma lamp An improved image heating apparatus using a plasma lamp is disclosed. The apparatus comprises at least one rotary elliptical mirror having a reflection surface of a rotary elliptical body at the inside; a plasma lamp disposed at a first focal point of the... | 05/30/1995 |
| 5414236 | Process for high quality plasma arc cutting of stainless steel and aluminum A plasma arc torch uses a mix of reactive and reducing gas flows to cut sheets of stainless steel, aluminum and other non-ferrous metals. The reducing gas flow to the cut is varied as a percentage of the total gas flow to maintain a reducing atmosphere do... | 05/09/1995 |
| 5410121 | System for feeding toxic waste drums into a treatment chamber A drum is introduced into an interlock chamber and the interlock chamber is sealed. A door leading to a transition chamber is opened and the drum is moved into the transition chamber. The transition chamber is contained within a spool valve which includes... | 04/25/1995 |
| 5399833 | Method for vitrification of fine particulate matter and products produced thereby The present invention provides a method for the melting and subsequent solidification of fine particulate material by use of a plasma torch. The fine particulate material is introduced into a furnace having a plasma torch to a depth sufficient to cover th... | 03/21/1995 |
| 5399829 | Material treatment method and apparatus A method of treating waste material which involves creating a substantially continuous curtain of plasma and directing the material to be treated through that curtain. An electric arc is generated between two electrodes which are separated by an annular s... | 03/21/1995 |
