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| Number | Title | Issue Date |
| 7438119 | System for heat treating castings and reclaiming sand A system for reclaiming sand from a casting process includes a chamber having an inlet, an outlet, and a plurality of baffles defining a circuitous path for the sand therebetween, a heating element for providing heat to the chamber, and a fluidizing distributor for ... | 10/21/2008 |
| 7427375 | Diffuser for an annealing furnace A diffuser (24) for an annealing furnace has a plurality of radially extending generally and vertically oriented vanes (40) for radially directing furnace gases. The vanes have top edges (42) defining a generally planar support and the top edges... | 09/23/2008 |
| 7276204 | Carburization treatment method and carburization treatment apparatus The invention provides a carburization treatment method in which a carburization treatment is conducted simultaneously with an operation of supplying a hydrocarbon gas and an oxidative gas into a furnace kept under a reduced pressure. Preferably, the internal pressu... | 10/02/2007 |
| 7255829 | Method and apparatus for treatment of metallic workpieces A method and an apparatus for the thermal treatment of metallic workpieces with which gas quenching can be obtained that is low in distortion, even for workpieces with an undulating shape or workpieces that are projectingly stackable are provided. In accordance with... | 08/14/2007 |
| 7134941 | Methods for residue removal and corrosion prevention in a post-metal etch process A method of plasma assisted CO2 cleaning for dry removal of residual photoresist and sidewall polymer with an etch gas mixture comprising fluorine containing gas, oxygen and hydrogen in N2 or H2O. The process removes polymer residues... | 11/14/2006 |
| 7101260 | Methods for resist stripping and other processes for cleaning surfaces substantially free of contaminants A method for manufacturing an article where the article has polymeric residue that is to be removed during the manufacture of the article. The article is introduced into a controlled environment of a processing tool that has at least first and second processing cham... | 09/05/2006 |
| 6991767 | Fluidized bed gas distributor system for elevated temperature operation A method and apparatus for the debonding and sand core removal of sand cores from cast parts, the heat treating of metal parts and the removal of organic contamination from metal parts, which is utilizing a fluid bed furnace having an improved fluidizing gas distrib... | 01/31/2006 |
| 6527884 | Hydrogen annealing process and apparatus therefor An apparatus for selectively implementing a depressurized or an atmospheric hydrogen annealing process comprises a reaction chamber, a hydrogen gas introduction line for feeding hydrogen gas into the reaction chamber and an atmospheric exhaust line and a ... | 03/04/2003 |
| 6464808 | Method and apparatus for reducing wrinkles on a strip in a rapid cooling zone of a heat treatment line A method is disclosed for reducing the formation of wrinkles on metal strip subject to cooling in continuous heat treatment lines in which the strip passes through cooling zones through which cooling gas flows. The method includes the step of gradually mo... | 10/15/2002 |
| 6451137 | Method of quenching after a low-pressure carburization A method for quenching steel parts having undergone a low-pressure thermal processing, which consists of submitting the parts to a high-pressure air flow.... | 09/17/2002 |
| 6270597 | Process for continuous heating and cleaning of wire and strip products in a stratified fluidized bed This invention is directed to a method for annealing strand wires or strips in a fluidized bed reactor having an atmosphere of fluidized gases flowing through fluidized particles. The method provides for stratifying the atmosphere of fluidized gases by pa... | 08/07/2001 |
| 6149860 | Carburization and quenching apparatus A carburization and quenching apparatus includes: a plurality of carburizing chambers for carburizing thin plate parts; a gas cooling chamber for cooling the thin plate parts carburized in the carburizing chambers; and a reservoir tank 3 connected to the ... | 11/21/2000 |
| 6106764 | Apparatus for scavenging cold-drawn, coil-forming tubes in a roller hearth furnace In a roller hearth furnace there is provided an apparatus for scavenging cold-drawn, coil-forming tubes. An essential element thereof is a pressure vessel (1; 1a) serving as reservoir for the scavenging agent, comprising a small calculable outlet opening ... | 08/22/2000 |
| 6106636 | Method and apparatus for controlling the atmosphere in a heat treatment furnace In a method of and apparatus for controlling an atmosphere in a heat treatment furnace according to the present invention, a carburizing is carried out while supplying a hydrocarbon series gas and an oxidization gas into the furnace. The quantity of a res... | 08/22/2000 |
| 6051078 | Method and apparatus for controlling the atmosphere in heat treatment furnace In a method of and apparatus for controlling an atmosphere in a heat treatment furnace according to the present invention, a carburizing is carried out while supplying a hydrocarbon series gas and an oxidization gas into the furnace, and the supply of the... | 04/18/2000 |
| 5989363 | Nitriding process and nitriding furnace therefor A nitriding process and nitriding furnace therefor wherein the parts to be treated are maintained at floating potentional in a vacuum furnace (9), current being provided to a metal screen (5) cathode surrounding the parts to be treated, the necessary heat... | 11/23/1999 |
| 5938866 | Method and an apparatus for the treatment of components by a gas mixture An apparatus for the treatment of components by means of a gas mixture, comprising mainly a first light gas and minor amounts of a second gas being heavier than the first gas, has a treatment chamber (10) in which the treatment occurs and a concentration,... | 08/17/1999 |
| 5902420 | Process and device for increasing the degree of absorption during superficial solid phase hardening of workpieces by laser radiation In order to harden the surface of workpieces having complex shapes without reviously applying absorption promoting surface layers, a mixture of inert gas and oxygen are supplied to the processing zone while the workpiece is exposed to laser radiation. The ... | 05/11/1999 |
| 5833918 | Heat treatment by plasma electron heating and solid/gas jet cooling A workpiece is heated by first forming an ionized gas plasma around the workpiece. A positive potential is applied to the workpiece to accelerate electrons from the plasma into the workpiece. The workpiece is uniformly surface heated by the energy directe... | 11/10/1998 |
| 5798007 | Process and apparatus for the continuous heat treatment of a metal strip travelling in a different atmosphere Process for the continuous heat treatment of a metal strip, the latter travelling through a furnace, which is thermally insulated, and in a protective atmosphere; the said furnace consisting of at least one section, for heating, for temperature hold and f... | 08/25/1998 |
| 5770146 | System for the heat treatment of metallic annealing material A system for the heat treatment of metallic annealing material (1, 12) comprising a distributor (3) for the heating or cooling medium consisting of air or a gas, where for the formation of an oblique blast the distributor (3) has tubular or slot-shaped no... | 06/23/1998 |
| 5749978 | Method and device for the controlled forming and feeding of a gaseous atmosphere having at least two components, and application in plants of thermal or carburizing treatment A method for the forming and feeding of a gaseous atmosphere having two components, at least one of which under the form of vapour obtained from liquid, envisages to bubble a first gaseous component within a liquid component kept under controlled conditio... | 05/12/1998 |
| 5741371 | Method and device for controlling the CO contents of a furnace atmosphere for carburization and carbonitriding of metallic work pieces A method for controlling the CO contents of furnace atmosphere for carburizing and carbonitriding metallic workpieces in a furnace includes the step of directly feeding a mixture of an oxidizing reagent and a hydrocarbon-containing fuel into the furnace f... | 04/21/1998 |
| 5722825 | Device for heat-treating metallic work pieces in a vacuum A device for heat-treating metallic workpieces in a vacuum has a revolving vacuum furnace with an inlet transfer lock for introducing a batch of workpieces into the revolving vacuum furnace and with an outlet transfer lock for removing the batch of workpi... | 03/03/1998 |
| 5452882 | Apparatus for quenching metallic ring-shaped workpieces For quenching heated metallic work pieces with a quenching intensity that lies in the region of H values from 0.2 to 4, which is typical for oil or water quenching, a cooling gas is used as the quenching medium in the form of discrete jet streams issuing ... | 09/26/1995 |
| 5441242 | Apparatus for contacting surfaces of workpieces with a flowing gas An apparatus is disclosed, which serves to contact with a flowing gas two mutually opposite, substantially flat and substantially circular annular surfaces of an annular cylindrical workpiece having an inside diameter not in excess of a predetermined maxi... | 08/15/1995 |
| 5360203 | Floatation pressure pad for metal strips A pressure pad comprises a plenum chamber, adapted to be conneceted to a pressurized-fluid supply means, having a pair of parallel slit nozzles formed in a top wall, and the chamber is arranged underneath a path of a strip. The plenum chamber is provided ... | 11/01/1994 |
| 5354039 | Gas dispersion nozzle apparatus for fluidized bed furnace A gas diffusing nozzle device for a fluidized bed furnace having high thermal resistance and durability especially, in a high-temperature environment and capable of being manufactured at a low cost, fluidizing a fluid layer uniformly using a fluidized gas... | 10/11/1994 |
| 5340419 | Method and apparatus for densifying an article Method and apparatus for densifying an article wherein the article is disposed in a first molten salt pressure transmission medium in a container. The first medium is heated to a first elevated densifying temperature. The container is disposed in a second... | 08/23/1994 |
| 5225144 | Gas-carburizing process and apparatus A gas-carburizing process wherein an article is treated by feeding a hydrocarbon gas and an oxidative gas of raw material gases directly into an atmospheric heat treating furnace, characterized in that, when the pressure within the furnace is negative, CO... | 07/06/1993 |
| 5185123 | Apparatus for annealing walls of nuclear reactors Apparatus suitable for annealing the interior walls of a nuclear reactor which comprises a nuclear reactor shell, a cap securely attached to the nuclear reactor shell, wherein the cap has an inlet line for the introduction of a hot gas under high pressure... | 02/09/1993 |
| 5164145 | Rotary furnace oil seal employing endothermic gas purge A rotary oil seal gas purge system for a rotary carburizing furnace, having a rotatable hearth in a furnace chamber containing a high carbon-potential furnace atmosphere comprising an endothermic carrier gas enriched with a hydrocarbon gas, features gas p... | 11/17/1992 |
| 5158625 | Process and apparatus for heat treating articles while hardening in gaseous medium Process for heat treating articles by hardening them in a recirculating gas medium which is in contact with the treated articles, the hardening gas being cooled by means of a heat exchanger, of the type in which helium is used as hardening gas, and is sto... | 10/27/1992 |
| 5145534 | Fluidized bed for quenching steel wire and process thereof A fluidized bed is disclosed for the continuous quenching of steel wires. The fluidized bed is provided with an air convection cooler with high cooling capacity. The temperature of the fluidized bed is regulated by means of a cooling air flow. Such a bed ... | 09/08/1992 |
| 5121903 | Quenching arrangement for a furnace The present arrangement provides for having the plenum divided into at least two sections. One section dumps quench gas from a first direction into the hot zone chamber during a first period and the other section dumps quench gas into the hot zone from an... | 06/16/1992 |
| 5089059 | Method and device for the heat treatment of metal straps A method and device (100) for heat treating a metal strap (1), characteri by passing the strap (1) within an enclosure (2) containing a gas (3) which is practically free of forced ventilation, in such a manner that a transfer of heat takes place between ... | 02/18/1992 |
| 5048801 | Sintering furnace A sintering furnace includes an upper housing having a gas permeable insulating enclosure therein, with heating elements within the enclosure, and a lower housing having a hearth against which the insulating enclosure rests. Sweep gas is introduced to the... | 09/17/1991 |
| 5048800 | Vertical heat treatment apparatus A vertical heat treatment apparatus includes a reaction furnace constituted by a reaction chamber having an inner tube and an outer tube and a heater arranged outside the reaction chamber, a manifold communicating with a lower portion of the reaction cham... | 09/17/1991 |
| 5045126 | Process and equipment for the heat treatment, before hardening, of metallic pieces by cementation, carbonitridation of heating The invention is exclusively concerned with heat treatments before hardening, of metallic pieces, by cementation, carbonitridation and heating. The process concerns the feeding of a non muffle heat treatment furnace with various components including nitro... | 09/03/1991 |
| 5018707 | Heating furnace A heating mantle for heating materials, such as metals, alloys or inorganic chemicals in a retort, includes a tubular wall and annular chambers cooperating with said wall for forming a tortious path around the retort for hot gases. The mantle provides a v... | 05/28/1991 |
