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...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 7351057 | Door plate for furnace The process chamber of a vertical furnace is provided with a closure, or door, comprising an upper and a lower door plate. The upper door plate has a gas exhaust opening proximate its center, thereby allowing for a symmetrical flow of process gases through the proce... | 04/01/2008 |
| 6962117 | Method and apparatus for controlling combustion in a furnace A method and system for controlling the combustion in a furnace in which the flue gas generated by the burning in the combustion zone is fed back to the combustion zone through a recirculation path to cool the combustion zone so that the temperature is below the mel... | 11/08/2005 |
| 6652271 | Combustion in a porous wall furnace This invention is directed to a method for carrying out combustion in a furnace having porous walls with a large surface area in a combustion zone in which a low velocity oxidant stream is injected through at least one oxidant injection side of the porous... | 11/25/2003 |
| 6506048 | Apparatus and method for transferring heat treated parts A parts container for minimizing oxidation of heat-treated parts during transfer in an oxygen-containing environment. The container includes: a heat-resistant vessel having an interior space and including oppositely positioned first and second apertures; ... | 01/14/2003 |
| 6398546 | Combustion in a porous wall furnace This invention is directed to a method for carrying out combustion in a furnace having porous walls with a large surface area comprising providing a combustion zone containing an atmosphere of furnace gases. A low velocity oxidant stream is injected throu... | 06/04/2002 |
| 5772428 | Method and apparatus for heat treatment including H2 /H2 O furnace region control A closed-loop control system controls introduction of either water or hydrogen into a furnace region where a part is subjected to an elevated temperature to accomplish a heat treatment process. The heat treatment process causes the part to participate in ... | 06/30/1998 |
| 5611476 | Solder reflow convection furnace employing flux handling and gas densification systems A solder reflow convection furnace employing flux collection and heating to minimize flux and solvent build up and gas densification to reduce input gas flow is disclosed. As solder melts in the furnace, an effluent of vaporized flux is driven off and can... | 03/18/1997 |
| 5609481 | Direct-fired stratified atmosphere furnace system A direct-fired furnace wherein a charge-proximal stratum is established between the charge and combustion gases emanating from one or more or burners oriented above the charge, wherein the charge-proximal stratum has a different oxidative effect upon the ... | 03/11/1997 |
| 5333776 | Atmospheres for brazing aluminum and aluminum alloys Aluminum or aluminum alloys are brazed in the presence of a non-corrosive flux using a low-cost, substantially dry nitrogen atmosphere produced by a non-cryogenic air separation technique such as a pressure swing adsorption (PSA) or a selective permeation... | 08/02/1994 |
| 5211820 | Gas analysis system for furnaces and the like A system for use in sensing the oxygen content of an industrial furnace gas typically containing hydrocarbons or hydrogen is disclosed. The system utilizes a conventional automotive EGR oxygen sensor probe positioned in an especially configured housing em... | 05/18/1993 |
| 4974663 | Cross-circulating method and apparatus for autoclave A method for circulating a gas in an autoclave which comprises a pressure container (A) having a wind tunnel (7) in which moldable materials (1) are placed and the gas is circulated by a blow fan (33), the pressure container (A) being sealably closed by a... | 12/04/1990 |
| 4975047 | Oven provided with oxygen concentration controls A test oven wherein heated air having a predetermined temperature is supplied and the oxygen concentration in the supplied air is controlled. The test oven has a test oven body having an air supply port and an air discharge port, a blower connected to the... | 12/04/1990 |
| 4964798 | Method and apparatus for quickly purging atmosphere gas from bell furnace A method and apparatus for vacuum purging bell type furnaces is provided. A vacuum shell unit is provided which is removably emplacible over the inner cover of the furnce and has a vacuum tight seal to the base. A vacuum is pulled both within the inner co... | 10/23/1990 |
| 4963090 | Reverse flow furnace/retort system Reversing the flow of conventional furnace/retort systems prevents damaging exhaust gases from entering the furnace while still maintaining a gas flow through the retort. The gases exit the retort into a treatment system; preventing contamination of any a... | 10/16/1990 |
| 4920998 | Method and apparatus for controlling flow bias in a multiple zone process The present invention provides a method and apparatus for controlling the fluid flow bias of continuous, multiple zone processes having gas or vapor comprising atmospheres that are in immediate access to each other. Active control of the fluid flow bias i... | 05/01/1990 |
| 4692114 | Vapor level control for vapor processing system A vapor processing system which has a vessel for containing a processing vapor generated by heating electronic fluid contained within the vessel. A selected saturated vapor zone level is devined for work product delivered to the vapor zone by generating a... | 09/08/1987 |
| 4596526 | Batch coil annealing furnace and method An apparatus for heat treating a work item includes a cover member and a base member on which the cover member is supported. A work space is defined between the base member and the cover member for receiving at least one work item which is positioned ther... | 06/24/1986 |
| 4579523 | Method of operating a controlled atmosphere furnace A method of operating a controlled atmosphere furnace. To prevent the entry of oxygen into the controlled atmosphere in the chamber of the furnace, which has a furnace door for the receipt and removal of parts by means of a feeding and removal device, the... | 04/01/1986 |
| 4571273 | Process of heating and cooling charges in batch-process industrial furnaces In a process of heating and cooling charges in batch-process industrial furnaces, particularly in a process of cooling coils of steel wire or strip steel in bell-type annealing furnaces, the charge is heated and cooled in contact with circulated protectiv... | 02/18/1986 |
| 4551091 | Method for reducing the volume of atmosphere needed to inhibit ingress of ambient oxygen into the furnace chamber of a continuous heat treatment furnace The volume of atmosphere needed to inhibit the ingress of ambient oxygen into the furnace chamber (3) of a continuous heat treatment furnace (1) can be reduced by introducing a gas containing free oxygen (e.g. air) into the entrance section (2) and/or exi... | 11/05/1985 |
| 4543060 | Heat treatment of workpieces A continuous heat treatment furnace has an entrance, a preheat zone, a thermal treatment zone, a cooling zone and an exit. Curtains are provided at the entrance and exit respectively. Nitrogen and hydrogen (or other reducing gas) are supplied to the furna... | 09/24/1985 |
| 4526534 | Cantilever diffusion tube apparatus and method A cantilever diffusion tube apparatus includes a quartz cantilever tube having a support end clamped to a laterally movable carriage mechanism and an outer end portion containing a plurality of spaced semiconductor wafers. The cantilever tube is coaxially... | 07/02/1985 |
| 4518349 | Cantilevered boat-free semiconductor wafer handling system An improved semiconductor wafer handling system completely eliminates the need for boats, sleds, paddles, wheeled carriers, etc., customarily employed in transporting wafers during heat processing through the use of a plurality of rigid, polished cantilev... | 05/21/1985 |
| 4490108 | Process for reducing the oxygen content of the atmosphere in a heat treatment furnace and heat treatment furnace for carrying out this process A process for reducing the oxygen content of the atmosphere in a heat treatment furnace for ceramic materials to a prescribed value comprises measuring the O2 content of the furnace atmosphere at the point in the furnace to be affected and intr... | 12/25/1984 |
| 4488871 | Process for producing uneven coloring effects on firing plate-like ceramic material For producing uneven coloring on firing plate-like ceramic material such as tiles or flags in a kiln, more specially a roller kiln, made up of preheating, firing and cooling zones, and through whose oxidizing atmosphere in the firing zone the material to ... | 12/18/1984 |
| 4482316 | Insulated atmosphere furnace A heat treat furnace wherein the furnace top and side walls are each defined by an outer, gas-tight metallic structural wall, an intermediate perforate metal plate generally parallel to and coextensive with the exterior wall to define a plenum chamber the... | 11/13/1984 |
| 4466791 | Single vapor condensation soldering facility A condensation soldering facility (10) comprised of a housing (12) having a divider member (22) therein which separates the housing into a drying chamber (24) in an upper section and a soldering chamber (26) in a lower section. A transfer member (76) is p... | 08/21/1984 |
| 4464845 | Method of heat- and moisture treatment of articles, for example, concrete articles, and an apparatus for accomplishing same The characteristic feature of the herein disclosed method resides in that it involves a zone control over temperature and humidity of articles being treated within the space of a tunnel chamber, the articles being blown with an air agent having a temperat... | 08/14/1984 |
| 4406618 | Method of operating continuous heat treatment furnace for metal strip coils A method of operating a continuous heat treatment furnace for metal strip coils includes steps of enclosing them in muffles in the furnace supplied with an atmosphere gas containing a combustible gas such as hydrogen and feeding the muffles into and throu... | 09/27/1983 |
| 4402492 | Burner apparatus for molten metal fume suppression Apparatus is described that is particularly adapted for suppressing fume generated in the flow of molten metal through the runner system of a blast furnace cast house. Burners adapted for combusting fuel and air are disposed at longitudinally spaced locat... | 09/06/1983 |
| 4398971 | Method of heating, holding or heat treatment of metal material In an indirectly heated, gas-fired furnace (10) for the heat treatment of metal material in an atmosphere of processing gas consisting predominantly of nitrogen, the processing gas is produced using the heating exhaust gases as the principal raw material.... | 08/16/1983 |
| 4391585 | Method of operating a continuous ceramic kiln A method of operating a continuous ceramic kiln having a decarbonization zone characterized in that oxygen or oxygen enriched air is added to the decarbonization zone to maintain the average oxygen concentration in the decarbonization zone at or about a p... | 07/05/1983 |
| 4365954 | Continuous furnace for firing ceramic articles A continuous electric tunnel furnace includes a tunnel through which articles to be fired are passed in a direction of feed. The tunnel has a length portion constituting a sintering zone. Nitrogen is introduced into the tunnel at the outlet thereof. The n... | 12/28/1982 |
| 4358305 | Method of and apparatus for analyzing atmosphere of a combustion chamber A hole through each of opposed walls of a combustion chamber of a glass melting apparatus and piping interconnect the chamber atmosphere to an oxygen analyzer. A sample of the chamber atmosphere is continuously moved through each of the holes and piping t... | 11/09/1982 |
| 4345896 | Methods and apparatus for calcining carbonaceous material The rate of calcining carbonaceous material in a rotary kiln is increased by introducing oxygen into the inlet of air fans mounted on the kiln. The introduction of oxygen is effected during a predetermined portion of each kiln revolution and is effective ... | 08/24/1982 |
| 4329142 | Method for heat treatment of clay and refractory ware In the manufacture of clay or refractory ware containing oxidizable material, stacks of the ware are passed through a tunnel kiln and a flow of air passed over the stacks. Fuel burners are operated to provide the necessary stages for firing the ware. Thes... | 05/11/1982 |
| 4321031 | Method and apparatus for condensation heating A method and apparatus for condensation heating. Articles to be heated are conveyed into a heating chamber which is filled with vapors of a fluid having a relatively high boiling point. When the vapors contact the article to be heated they condense thereo... | 03/23/1982 |
| 4272239 | Direct heating of heat treat furnace chamber The present invention is an improved apparatus and method for directly heat treating articles in a sealed treatment chamber of the heat treatment furnace. A burner means fires into a precombustion chamber which is connected in communication with the treat... | 06/09/1981 |
| 4264299 | Process and apparatus for controlling losses in volatile working fluid systems A process and apparatus are disclosed for controlling losses in volatile working fluid systems. In accordance with the process, the object upon which a work operation is to be effected is sequentially moved from a first sealable chamber to a second such c... | 04/28/1981 |
| 4255132 | Incinerator-heater system A high efficiency system and method for supplying heat energy to a combustible effluent producing primary process, such as to a paint drying oven, in which the output of an incinerator-heater is controlled in order to be matched to the heat energy require... | 03/10/1981 |
