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| Number | Title | Issue Date |
| 7753678 | Method and apparatus for producing charcoal Apparatus for batch processing source material into charcoal in a battery of kilns, each of which use forced convection of process gases through the source material to shorten the process cycle time, and all of which use an external combustor to burn the process was... | 07/13/2010 |
| 7425692 | Thermal processing system having slot eductors In a system for thermally processing materials, at least one slot eductor is disposed in a wall or roof surface of the furnace chamber to provide circulation of gas within the furnace chamber. ... | 09/16/2008 |
| 7422009 | Gas “true” convection bake oven Disclosed is a convection oven capable of producing a “true” convection cooking environment with a single gas burner disposed underneath the oven bottom in a combustion box. A fan compartment is disposed substantially at the center of the back wall, and defined ... | 09/09/2008 |
| 7371999 | Temperature changing apparatus having a rotating air deflector A temperature changing apparatus including a chamber defining a cavity is configured to receive a food product therein. A radially exhausting fan disposed in the cavity circulates air in the cavity over the food product. An air deflector disrupts the air radially ex... | 05/13/2008 |
| 7335019 | Firing container for silicon nitride ceramics A firing container for silicon nitride ceramics, which is a hermetically sealed container having a gas inlet and a gas outlet, characterized in that the interior of the hermetically sealed container is partitioned by a gas supply chamber partition plate into a gas s... | 02/26/2008 |
| 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 |
| 7196297 | Process and system for thermally uniform materials processing The present invention provides a system and method for binder removal and sintering of materials such as ceramic materials and products, LTCC intervals, solid oxide fuel cells and powder metals. A combination of microwave and convection/radiation heating is employed... | 03/27/2007 |
| 7097431 | Mechanical kinetic vacuum pump A mechanical vacuum pump includes a rotor made of a light metal alloy by powder metallurgy. The powder metallurgy increases the resistance of the rotor to heat and creep. ... | 08/29/2006 |
| 7029271 | Flameless oxidation burner A device including a burner (6) for directing a fuel/air mixture into a reaction chamber (2) for flameless oxidation of fuels. The burner (6) discharges a fuel/air jet transversely to a longitudinal axis (A) of the burner and an exhaust gas chan... | 04/18/2006 |
| 6947467 | Cooling system for heat treating furnace An electric resistance high temperature vacuum furnace having radiant heating units evenly spaced around the sides and ends of the furnace hot zone. Pairs of units are automatically regulated both radially and longitudinally according to the temperature required by ... | 09/20/2005 |
| 6905306 | Mechanical kinetic vacuum pump with rotor and shaft A mechanical kinetic vacuum pump with a stator (1), a rotor (6, 7) made from an aluminum or magnesium alloy and a rotor (6, 7) and a bearing shaft (3). The shaft (3) and the rotor (6, 7) are connected by a shrink- or screw-f... | 06/14/2005 |
| 6905304 | Heat dissipation fan A heat dissipation fan includes a casing having a bottom wall and a side wall extending from the bottom wall and defining an open top of the casing. The side wall itself defines a side opening. A rotary fan assembly is housed in the casing and is rotatably supported... | 06/14/2005 |
| 6821114 | Gas-cooled single chamber heat treating furnace, and method for gas cooling in the furnace A gas-cooled single-chamber type heat-treating furnace T in which cooling gas vents 9A and 9B opened and closed by doors 11A and 11B are provided on each of mutually opposed walls of an inner chamber 5 forming a processing room and... | 11/23/2004 |
| 6780225 | Reflow oven gas management system and method Reflow solder oven gas management system introduces an inert gas into and removes contaminated gas from a reflow oven tunnel (42) at predetermined points (6, 8) to influence the oven tunnel gas flow and to dilute and expel excess oxygen. The contaminat... | 08/24/2004 |
| 6718965 | Gas “true” convection bake oven Disclosed is a convection oven capable of producing a “true” convection cooking environment with a single gas burner disposed underneath the oven bottom in a combustion box. A fan compartment is disposed substantially at the center of the back wall, and defined ... | 04/13/2004 |
| 6684875 | Conveyor oven with modulated gas flow An automatic oven cooks or bakes a food product over a timed period of time during which a burner delivers heat to the oven cavity. Thermocouple sensors in the cavity control a modulator which regulates the amount of gas flowing to the burner to maintain ... | 02/03/2004 |
| 6648946 | Process for recovering helium using an eductor This invention is directed to a process for recovering helium. The process includes a) passing a first gas containing helium to an eductor to produce a second gas; b) passing the second gas through a heat exchanger to produce a third gas; and c) recoverin... | 11/18/2003 |
| 6609907 | Apparatus and method to control emissions of nitrogen oxide A combustion apparatus and process for improved flue gas recirculation wherein the recirculation line penetrates into an exhaust duct, such as the exhaust stack for capturing and directing a portion of said flue gas through the recirculation line which is... | 08/26/2003 |
| 6572370 | Heat regulating unit A forced air heating system has a heat regulating unit assembled therewith, the heating system comprising a furnace having fuel burner and a flue pipe for outlet gases. The heat regulating unit has a metal flue conduit with a flue gas inlet and a flue gas... | 06/03/2003 |
| 6481433 | Conveyor oven having an energy management system for a modulated gas flow A conveyor oven has a modulating gas valve which raises and lowers the thermal output of a burner that heats the oven. A bypass line passes a minimum amount of gas to prevent the burner from completely shutting down during periods while the oven remains a... | 11/19/2002 |
| 6447288 | Heat treating apparatus Apparatus for heat treating a heat treatable material including a housing having an upper opening for receiving a heat treatable material at a first temperature, a lower opening, and a chamber therebetween for heating the heat treatable material to a seco... | 09/10/2002 |
| 6431859 | Combustion gas and air recovery apparatus An apparatus including a housing defining a heating process chamber. The housing has an opening communicating the process chamber to the ambient atmosphere. A burner is included that fires into a combustion chamber to heat gas. Also included is a collecto... | 08/13/2002 |
| 6428742 | Method for heat-treating metallic workpieces A method for heat-treating metallic workpieces, in which a flow of cooling gas is generated in a vacuum furnace by a fan in order to quench the workpieces, with the fan being driven by a rotary current motor that is operated with a predetermined supply vo... | 08/06/2002 |
| 6418755 | Glass melting apparatus and method including exhausting the furnace atmosphere by removal of a heating element A system for melting and delivering glass to a work area such as spinners for making fiberglass includes a melter with heaters so arranged that the "hot spot" in the molten glass is located away from the walls and corrosion sensitive parts so that the var... | 07/16/2002 |
| 6311685 | Heat exchanger for ovens for food cooking The heat exchanger is particularly for ovens for food cooking comprising a radial fan, and is associated with a burner supplied by a blower. The heat exchanger has a first part of pipe into which the combustion gases are made to flow, which makes an almos... | 11/06/2001 |
| 6250296 | Convection oven with circulated air filtration means A convection oven with a filtration system for recirculated convection gas. The oven includes an interior chamber, a product support in the interior chamber and a blower in fluid communication with at least one duct (preferably a plurality) for circulatin... | 06/26/2001 |
| 6138660 | Forced convective track oven having oval spirals A forced convective track oven comprises a track conveyor including first and second circular spirals, the first circular spiral for conveying bakery trays and dough products upwardly and the second circular spiral portion for conveying bakery trays and d... | 10/31/2000 |
| 5997286 | Thermal treating apparatus and process A thermal treating apparatus and process providing convection thermal transfer for elevated processing temperatures and chemical treatment. A recirculation plenum for passage of spent treatment fluid from and fresh treatment fluid to a treatment chamber m... | 12/07/1999 |
| 5954851 | Method for preheating glass batch A method and apparatus for efficiently preheating glass batch utilizing waste gas from a glass melting furnace is provided. In a method and apparatus for preheating glass batch utilizing hot waste gas discharged from a glass melting furnace before glass b... | 09/21/1999 |
| 5951281 | Gas flow circulation type tubular heating equipment The present invention relates to a gas recirculating tubular heating equipment which improves the heat transfer performance, reduces a heat transfer area to approximately 1/2 or under of that of a prior art and is not limited to a certain type of availabl... | 09/14/1999 |
| 5899689 | Furnace for processes and treatments in a sub-stoichiometric atmosphere Furnace for processes and treatments in a sub-stoichiometric atmosphere, includes a combustion chamber (1) provided with a fuel-feeding mechanism, feeding mechanism (3) for combustion promoter and an extraction mechanism (4) for the gases produced in the ... | 05/04/1999 |
| 5868562 | Paint drying furnace Disclosed is a paint drying furnace for baking and drying paint films on painted objects following a painting process. The furnace of the invention has an interior combustion type heating device arranged on fresh air passages upstream of points of connect... | 02/09/1999 |
| 5830284 | Method and device for the heat treatment of workpieces The present invention involves a method and a device for the heat treatment of workpieces, which are heated with radiant heat generated through the combustion of gaseous fuel. Some of the workpieces are subjected to a carburisation atmosphere formed by a ... | 11/03/1998 |
| 5795146 | Furnace chamber having eductor to enhance thermal processing A furnace for thermally processing product includes one or more eductors. The eductor provides for increased circulation of atmosphere within the furnace for heat transfer or outgassing purposes. The eductor may be used to introduce clean gas to a product... | 08/18/1998 |
| 5601070 | Convection oven A convection oven having an insulated oven chamber bounded by a front access door, a floor, a ceiling, two side walls, and a rear wall. An inlet air passageway, which includes a heating element, delivers heated air to the oven chamber, and an exhaust pass... | 02/11/1997 |
| 5586877 | Infrared ray emitters with catalytic burner An infrared ray emitter with catalytic burner including a box having an opening covered by a catalytic structure and wherein a supply of combustion gas is applied adjacent the catalytic structure and a supply of recirculating gas is introduced into the bo... | 12/24/1996 |
| 5568803 | Relating to gaseous fuel burner assemblies and to appliances incorporating such burner assemblies A gaseous fuel burner assembly for heating a space particularly an oven of a domestic cooking appliance comprises a gaseous fuel burner separated from the space by a baffle plate, and, also separated from the space by the baffle plate, a fan for withdrawi... | 10/29/1996 |
| 5550858 | Heat treat furnace with multi-bar high convective gas quench An improved cooling arrangement is disclosed for an industrial heat treat furnace. The furnace includes a closed end cylindrical heat treat chamber in which a plenum plate is suspended adjacent the rear end thereof. The plenum plate has a central underpre... | 08/27/1996 |
| 5480299 | High-temperature gas blower impeller with vanes made of dispersion-strengthened alloy, gas blower using such impeller, and gas circulating furnace equipped with such gas blower An impeller for a high-temperature gas blower suitable for a floating conveyor furnace, having vanes each formed of a dispersion-strengthened alloy which includes as a disperse or internal phase 0.1-2.0% by weight of finely divided particles of an oxide o... | 01/02/1996 |
| 5480300 | Vertical heat-treating apparatus and heat insulator It is an object of the present invention to provide a vertical heat treatment apparatus having a heat insulator, which has sufficient heat insulation, heat retention and high load pressure bearing properties to cope with increased size dimensions and numb... | 01/02/1996 |
