Modulating Or Stabilizing Pressure Or Temperature Patents (Class 432/24)
  • Patent number: 10677371
    Abstract: A control valve for adjusting the cross-sectional area of flow in at least one pipe, in particular for highly dynamic control of the coolant volume for cooling sections in rolling mills, includes a valve body, at least one valve seat and a positioning actuator configured for modifying the position of the valve body. The positioning actuator includes a linear electric motor in order to achieve reproducible response behavior, short response times and high positioning precision of the control valve.
    Type: Grant
    Filed: January 20, 2017
    Date of Patent: June 9, 2020
    Assignee: GEVA AUTOMATION GMBH
    Inventor: Burkhard Kaas
  • Patent number: 9188514
    Abstract: A sample of a chemical compound is contained within a pressure controlled atmospheric chamber that is set to a predetermined atmospheric pressure. The sample includes a parent material and one or more diffusive atomic or molecular constituents or interstitials. The sample is in thermal contact with a heat source having a first temperature and a heat sink having a second temperature. The sample is annealed until an equilibrium gradient distribution of the diffusive atomic or molecular constituents or interstitials occurs along the sample.
    Type: Grant
    Filed: May 23, 2013
    Date of Patent: November 17, 2015
    Assignee: THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE NAVY
    Inventor: Benjamin J. Taylor
  • Publication number: 20150079528
    Abstract: The present invention relates to a pressing arrangement for treatment of articles by hot pressing and in particular to a pressing arrangement for hot isostatic pressing of containers holding substances. The method comprises: placing containers including the substance in a load compartment in the furnace and loading a pressure medium into the pressure vessel and substantially all pressure medium flowing out from the furnace chamber (18) passes at least one substance capturing module, which may include the walls of the guiding passage, at least one condensation element (35) in the guiding passage, filters (41, 43) arranged in the guiding passage, before making contact with the pressure vessel including the top and bottom closures (8, 9).
    Type: Application
    Filed: March 21, 2011
    Publication date: March 19, 2015
    Applicant: Avure Technologies AB
    Inventor: Mats Gärdin
  • Publication number: 20140272745
    Abstract: A pressing arrangement for treatment of articles by hot pressing includes a pressure vessel including a furnace chamber and a furnace to hold the articles. A fan circulates a pressure medium within the furnace chamber, and enhances an inner convection loop at a load compartment. The inner convection loop pressure medium has an upward flow through the load compartment, and a downward flow along a peripheral portion of the furnace chamber. A flow generator generates a flow of pressure medium into the load compartment downstream the fan to enhance the inner convection loop. The flow is generated by transporting the pressure medium upwards from a space below a bottom insulating portion and above a bottom end portion, and by injecting the pressure medium into the load compartment downstream the fan to enhance the inner convection loop.
    Type: Application
    Filed: March 13, 2013
    Publication date: September 18, 2014
    Applicant: AVURE TECHNOLOGIES AB
    Inventor: Mats Gardin
  • Publication number: 20140263273
    Abstract: A chamber apparatus including a chamber which accommodates a substrate having a coating film formed thereon; a first heating part which is accommodated in the chamber and disposed on a first face side of the substrate; a second heating part which is accommodated in the chamber and disposed on a second face side of the substrate opposite to the first face; and a pressure control part which is capable of pressurizing and depressurizing inside of the chamber in a heated state.
    Type: Application
    Filed: March 12, 2013
    Publication date: September 18, 2014
    Applicant: TOKYO OHKA KOGYO CO., LTD.
    Inventors: Tsutomu Sahoda, Yoshiaki Masu, Takashi Maruyama
  • Publication number: 20140255860
    Abstract: The invention relates to a method for monitoring an operating status of an anode furnace, wherein the anode furnace is formed from a plurality of heating ducts (12) and furnace chambers, wherein the furnace chambers serve for receiving anodes and the heating ducts serve for controlling the temperature of the furnace chambers, wherein the anode furnace comprises at least one furnace unit (11) having a heating zone (18), a firing zone (19) and a cooling zone (20), wherein a suction device (15) is arranged in the heating zone and a burner device (16) is arranged in the firing zone, wherein, by means of the burner device, combustion air is heated up in the heating ducts of the firing zone, wherein, by means of the suction device, hot air is sucked out of the heating ducts of the heating zone, wherein a suction output of the suction device is determined, and wherein a pressure in the heating duct is measured, wherein a volumetric flow in the heating duct is determined from a ratio of suction output and pressure.
    Type: Application
    Filed: September 29, 2011
    Publication date: September 11, 2014
    Inventors: Hans-Peter Mnikoleiski, Detlef Maiwald, Wolfgang Uhrig, Frank Heinke, Domenico Di Lisa, Andreas Himmelreich
  • Patent number: 8662886
    Abstract: The present invention relates generally to semiconductor wafer fabrication and more particularly but not exclusively to advanced process control methodologies for controlling oxide formation using pressure. The present invention, in one or more implementations, includes a pressure stabilization system to dynamically adjust scavenger pressure in a furnace during wafer fabrication in relation to a pressure formation range, value, or one or more pressure indicators in a wafer fabrication process.
    Type: Grant
    Filed: November 12, 2007
    Date of Patent: March 4, 2014
    Assignee: Micrel, Inc.
    Inventor: Miles Dudman
  • Publication number: 20130276931
    Abstract: A flexible pipe body and methods of producing a flexible pipe body are disclosed. The method may include providing a tubular length of polymeric material for forming a polymeric layer of flexible pipe body; providing a strength layer radially outwards of the polymeric layer; and treating the polymeric layer with a non-ambient temperature and pressure.
    Type: Application
    Filed: April 12, 2013
    Publication date: October 24, 2013
    Applicant: Wellstream International Limited
    Inventors: Upul Shanthilal Fernando, Neville Dodds, Geoffrey Stephen Graham, Michelle Davidson, Peter Kirton, Philip Nott, Andrew Thompson
  • Publication number: 20130209948
    Abstract: A method for increasing temperature homogeneity in a pit furnace wherein at least two ingots to be heated lean against a respective one of first and second opposite inner walls of the pit furnace to form an elongated space having a V-shaped cross-section between them includes arranging at least one lance for an oxidant with an oxygen content of at least 85 percent by weight and at least one lance for fuel in a furnace wall with their orifices opening into the furnace at a distance from each other for supplying the oxidant and fuel to said V-shaped space to be combustible therein, wherein the orifice of the oxidant lance is arranged above the orifice of the fuel lance and is directed for the oxidant to flow obliquely downwards and along a longitudinal direction of said V-shaped space.
    Type: Application
    Filed: May 3, 2011
    Publication date: August 15, 2013
    Inventor: Rudiger Eichler
  • Publication number: 20120264072
    Abstract: An apparatus for performing reactive thermal treatment of thin film photovoltaic devices includes a furnace having a tubular body surrounded by heaters and cooling devices. The apparatus includes cooled doors at ends of the furnace separated from a central portion of the furnace by baffles. The cooled doors facilitate increased convection within the furnace and improve temperature uniformity.
    Type: Application
    Filed: January 18, 2012
    Publication date: October 18, 2012
    Applicant: Stion Corporation
    Inventor: Ashish Tandon
  • Patent number: 8246757
    Abstract: Pyrolysis methods for disassociating an organic mass, or coating from an article, by placing the article in an air tight processing chamber, circulating a gaseous mixture of ambient air and at least 40% water vapor from an opening, through the processing chamber and out of an exhaust port, and maintaining the processing chamber at a temperature above 650 degrees Fahrenheit for a sufficient time to disassociate the organic material. A batch oven and a continuous processing oven including entrance and exit air closures that utilize the pyrolysis methods are described.
    Type: Grant
    Filed: March 30, 2005
    Date of Patent: August 21, 2012
    Inventor: William C. Nowack
  • Publication number: 20120064469
    Abstract: A heat treatment apparatus and control method enabling the apparatus to settle down the internal temperature of a treating vessel to a target temperature accurately and quickly. The apparatus includes a furnace body with a heater on an inner circumferential surface thereof, a treating vessel disposed inside the furnace body, a cooling medium supply blower and cooling medium release blower connected to the furnace body, and a temperature sensor provided inside the treating vessel. A signal from the temperature sensor is sent to a heater output computing unit of a controller. The computing unit determines a heater output level to be obtained during temperature regulation with the heater only, the heater output level being based on a preset temperature that has been determined by a temperature determining unit and temperature detected by the temperature sensor. A blower output computing unit activates blower output based on the heater output level.
    Type: Application
    Filed: August 30, 2011
    Publication date: March 15, 2012
    Applicant: Tokyo Electron Limited
    Inventors: Koji YOSHII, Tatsuya Yamaguchi, Wenling Wang, Takanori Saito
  • Publication number: 20090186311
    Abstract: This shaft seal structure has at a fitting portion between a container wall of a pressurized container in which high pressure gas is enclosed and a rotating shaft that passes through the container wall: O-rings that are disposed at least two locations in the axial direction of the rotating shaft; and grease that is pressurized.
    Type: Application
    Filed: April 6, 2006
    Publication date: July 23, 2009
    Inventor: Kazuhiko Katsumata
  • Publication number: 20090176181
    Abstract: The present invention relates generally to semiconductor wafer fabrication and more particularly but not exclusively to advanced process control methodologies for controlling oxide formation using pressure. The present invention, in one or more implementations, includes a pressure stabilization system to dynamically adjust scavenger pressure in a furnace during wafer fabrication in relation to a pressure formation range, value, or one or more pressure indicators in a wafer fabrication process.
    Type: Application
    Filed: November 12, 2007
    Publication date: July 9, 2009
    Applicant: MICREL, INC.
    Inventor: Miles DUDMAN
  • Patent number: 6736927
    Abstract: A system is disclosed for speeding workpiece thoughput in low pressure, high temperature semiconductor processing reactor. The system includes apparatus for loading a workpiece into a chamber at atmospheric pressure, bringing the chamber down to an intermediate pressure, and heating the wafer while under the intermediate pressure. The chamber is then pumped down to the operating pressure. The preferred embodiments involve single wafer plasma ashers, where a wafer is loaded onto lift pins at a position above a wafer chuck, the pressure is rapidly pumped down to about 40 Torr by rapidly opening and closing an isolation valve, and the wafer is simultaneously lowered to the heated chuck. Alternatively, the wafer can be pre-processed to remove an implanted photoresist crust at a first temperature and the chamber then backfilled to about 40 Torr for further heating to close to the chuck temperature.
    Type: Grant
    Filed: June 10, 2002
    Date of Patent: May 18, 2004
    Assignee: Matrix Integrated Systems, Inc.
    Inventors: Albert Wang, Scott Baron, Prasad Padmanabhan, Gerald M. Cox
  • Publication number: 20030059734
    Abstract: The method of preparing an oxide superconducting wire comprises steps of preparing a wire by coating raw material powder for a Bi—Pb—Sr—Ca—Cu—O based oxide superconductor including a 2223 phase with a metal and heat treating the wire in a pressurized atmosphere containing oxygen in a prescribed partial pressure, and the total pressure of the pressurized atmosphere is at least 0.5 MPa. The pressure heat treatment apparatus comprises a pressure furnace storing and heat treating a target in a pressurized atmosphere, a pressure regulator for measuring the total pressure in the pressure furnace, an oxygen concentration meter for measuring the oxygen concentration in the pressure furnace and a controller for controlling the oxygen partial pressure in the pressure furnace in response to the total pressure measured by the pressure regulator and the oxygen concentration measured by the oxygen concentration meter.
    Type: Application
    Filed: October 25, 2002
    Publication date: March 27, 2003
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Shinichi Kobayashi, Tetsuyuki Kaneko, Ryosuke Hata
  • Patent number: 6436335
    Abstract: A method for management of an anode furnace, from which an adjustable volume of flue gas is directed into a flue system, comprises the steps of measuring the actual flue gas temperatures in flues of each section as actual temperatures, taking related set temperatures from a set temperature schedule, calculating a time integral of deviation between actual and set temperatures, modifying the actual temperature during a baking process such that the time integral is reduced to zero at the end of the process, registering at least one of the oxygen content and the fuel load in each flue, and setting burner capacity according to the set temperature and to the available oxygen content in the flue.
    Type: Grant
    Filed: April 12, 2000
    Date of Patent: August 20, 2002
    Assignee: Innovatherm Prof. Dr. Leisenberg GmbH & Co. KG
    Inventor: Wolfgang Leisenberg
  • Patent number: 6409932
    Abstract: A method is disclosed for speeding workpiece thoughput in low pressure, high temperature semiconductor processing reactor. The method includes loading a workpiece into a chamber at atmospheric pressure, bringing the chamber down to an intermediate pressure, and heating the wafer while under the intermediate pressure. The chamber is then pumped down to the operating pressure. The preferred embodiments involve single wafer plasma ashers, where a wafer is loaded onto lift pins at a position above a wafer chuck, the pressure is rapidly pumped down to about 40 Torr by rapidly opening and closing an isolation valve, and the wafer is simultaneously lowered to the heated chuck. Alternatively, the wafer can be pre-processed to remove an implanted photoresist crust at a first temperature and the chamber then backfilled to about 40 Torr for further heating to close to the chuck temperature. At 40 Torr, the heat transfer from the chuck to the wafer is relatively fast, but still slow enough to avoid thermal shock.
    Type: Grant
    Filed: December 27, 2000
    Date of Patent: June 25, 2002
    Assignee: Matrix Integrated Systems, Inc.
    Inventors: Albert Wang, Scott Baron, Prasad Padmanabhan, Gerald M. Cox
  • Publication number: 20020001788
    Abstract: This invention is a method of determining set temperature trajectories for a heat treatment system that conducts a first heat treatment process and a second heat treatment process to an object to be processed. The method comprises the steps of: conducting the first heat treatment process to a first test object to be processed, by using a temporary first set temperature trajectory; measuring a result of the first heat treatment process produced on the first test object to be processed; and determining a first set temperature trajectory for the first heat treatment process by correcting the temporary first set temperature trajectory on the basis of the measured result of the first heat treatment process.
    Type: Application
    Filed: August 22, 2001
    Publication date: January 3, 2002
    Inventors: Koichi Sakamoto, Wenling Wang, Fujio Suzuki, Moyuru Yasuhara, Keisuke Suzuki
  • Publication number: 20010047979
    Abstract: A method is disclosed for speeding workpiece thoughput in low pressure, high temperature semiconductor processing reactor. The method includes loading a workpiece into a chamber at atmospheric pressure, bringing the chamber down to an intermediate pressure, and heating the wafer while under the intermediate pressure. The chamber is then pumped down to the operating pressure. The preferred embodiments involve single wafer plasma ashers, where a wafer is loaded onto lift pins at a position above a wafer chuck, the pressure is rapidly pumped down to about 40 Torr by rapidly opening and closing an isolation valve, and the wafer is simultaneously lowered to the heated chuck. Alternatively, the wafer can be pre-processed to remove an implanted photoresist crust at a first temperature and the chamber then backfilled to about 40 Torr for further heating to close to the chuck temperature. At 40 Torr, the heat transfer from the chuck to the wafer is relatively fast, but still slow enough to avoid thermal shock.
    Type: Application
    Filed: December 27, 2000
    Publication date: December 6, 2001
    Inventors: Albert Wang, Scott Baron, Prasad Padmanabhan
  • Patent number: 6276929
    Abstract: A method for controlling kiln pressure for a shuttle kiln having an exhaust gas fan and an exhaust gas damper in an exhaust gas passage includes the steps of performing a control operation for controlling the number of revolution of the exhaust gas fan to control flow rate of the exhaust gas to maintain the kiln pressure at a predetermined pressure, and performing a control operation for adjusting opening of the exhaust gas damper based on the number of revolution of the exhaust gas fan. The method can expand the control range of exhaust gas flow, and operation with energy saving efficiency can be performed.
    Type: Grant
    Filed: September 2, 1998
    Date of Patent: August 21, 2001
    Assignee: NGK Insulators, Ltd.
    Inventors: Tsuyoshi Kuroda, Kenji Kawaguchi, Yasuhiro Ito
  • Patent number: 6113386
    Abstract: A method and apparatus is disclosed for heating metal billets or other separate pieces of metal in a continuous furnace using two different burner systems. The primary burner system provides the majority of available heat at relatively high flame temperatures. The secondary high velocity burner system extrains how furnace products of combustion that impinge around on the load. Thus, heat transfer and temperature uniformity is improved by forcing hot gases between the metal pieces.
    Type: Grant
    Filed: October 9, 1998
    Date of Patent: September 5, 2000
    Assignee: North American Manufacturing Company
    Inventors: Robert A. Shannon, Lawrence Vincent Rich, Frank Christian Gilbert
  • Patent number: 5876197
    Abstract: In order to create a regenerative, energy-saving fuel firing for an industrial furnace, particularly for a metal smelting furnace, that can flexibly take all possible time and space operating conditions and demands of the furnace to be heated as well as the thermic conditions of the respectively employed, heat-storing regenerators exactly into consideration, it is inventively proposed that at least two regenerator/burner modules (3) are switchable from burner mode (7) into regenerator mode (7r) (exhaust gas extraction mode) or, respectively, vice versa independently of one another proceeding from the process controller of the industrial furnace (1), namely with employment of reverse valves (11) or reversible ventilators or, respectively, two-stream ventilators.
    Type: Grant
    Filed: March 19, 1997
    Date of Patent: March 2, 1999
    Assignees: Gautschi Electro-fours S.A., BFI Betriebsforschungsinstitut, VDEh-Institut fur angewandte Forschung GmbH
    Inventors: Franz Engelberg, Martin Wicker, Gerhard Villinger, Wolfgang Bender
  • Patent number: 5660542
    Abstract: A method and apparatus for controlling the operation of a plurality of burners of a cupola. The method includes the steps of separately supplying air and fuel to each burner of the cupola, measuring the flow rates of air and fuel supplied to each burner, controlling either the flow rate of air or flow rate of fuel supplied to each burner as a function of a desired heat energy output of the burners and controlling the other of the flow rate supplied to each burner as a function of the measured flow rate of air or fuel supplied to each burner and a preselected ratio of flow rate of air supplied to each burner and of flow rate of fuel supplied to each burner.
    Type: Grant
    Filed: October 22, 1993
    Date of Patent: August 26, 1997
    Assignee: Maumee Research & Engineering Incorporated
    Inventors: Franklin G. Rinker, William C. Rinker
  • Patent number: 5639233
    Abstract: A kiln and method of firing kilns or the like in which high firing rate gas streams are introduced into the ware treating chamber in the form of pulsed jets and a continuous low firing rate gas stream is also introduced into the ware treating chamber for maintaining uniformity of temperature and atmosphere within the ware treating chamber. The time interval between the pulsed jets is controlled in accordance with the difference between a set predetermined temperature and the actual temperature in the ware treating chamber. Also disclosed is a burner for the kiln including coaxial primary and secondary nozzles for burning fuel. The primary nozzle burns fuel at a high rate and is pulsed intermittently while the secondary nozzle burns constantly at a low rate.
    Type: Grant
    Filed: July 7, 1995
    Date of Patent: June 17, 1997
    Inventors: Ralph E. Ruark, Francis X. Petrus
  • Patent number: 5595483
    Abstract: Materials containing vaporizable substances are exposed successively in at least two treatment chambers (10, 13, 14), which can be closed off with respect to each other, to a series of decreasing pressures and increasing temperatures. The vaporizable substances are exhausted separately from each treatment chamber (10, 13, 14) and at least partially condensed and collected. The solid materials are discharged from the last treatment chamber (14). The treatment chambers (10, 13, 14) can be closed off against each other, against the atmosphere, and against any other units which may be connected to them downline (17, 18) by vacuum valves (11, 12, 115, 16) and are connected to vacuum lines (10a, 13a, 14a) in which condensers (10b, 13b, 14b) and vacuum pumps (10c, 13c, 14c) are installed.
    Type: Grant
    Filed: March 20, 1995
    Date of Patent: January 21, 1997
    Assignee: Ald Vacuum Technologies GmbH
    Inventors: Albrecht Melber, Erwin Wanetzky, Dieter Uschkoreit
  • Patent number: 5595481
    Abstract: A method for controlling temperature in a heating kiln is able to maintain the temperature uniformly at a set temperature of the kiln. Output of each burner provided in the kiln is controlled on the basis of temperatures at plural positions affected by plural burners to make the temperature in the kiln substantially equal to a set temperature of the kiln. Mean values of temperatures at the plural positions are calculated and the burners are controlled to bring the mean values into coincidence with the set temperature. Alternatively, contribution rates .alpha.1 and .alpha.2 are determined which correspond to the influence of one burner on the temperature of the thermocouple for the other burner. Handicap temperatures TH1 and TH2 are then calculated by substituting temperatures T1 and T2 of the one and the other burners in equations TH1=T1+(T2-T1) .alpha.1 and TH2=T2+(T1-T2) .alpha.2. The burners are then controlled to make the handicap temperatures coincide with the set temperature.
    Type: Grant
    Filed: May 18, 1995
    Date of Patent: January 21, 1997
    Assignee: NGK Insulators, Ltd.
    Inventor: Kazuhiro Miyahara
  • Patent number: 5595480
    Abstract: A method for sintering industrial waste into environment conserving stones. The process mixes waste industrial earth and industrial waste in a predetermined ratio, and forms sterile environment protecting stones with high strength by the following processes: vacuum ejection, drying, breaking, screening, separating, sintering, and vibrating screening. The stones can be uses in the construction of civil engineering projects, or used as stone additives in asphalt pavement.
    Type: Grant
    Filed: October 31, 1994
    Date of Patent: January 21, 1997
    Inventor: Hsun Wang
  • Patent number: 5560305
    Abstract: A burner block for mounting a burner within a furnace containing a melt to be heated by the burner. The burner block comprises a body having a passageway terminating in a divergent opening. The passageway is configured to receive the burner so that the burner is recessed within the divergent opening and a flame produced by the burner is directed out of the divergent opening and over the melt. The divergent opening has a lower section angled in a downward direction and the lower section has a reversed step to produce a primary recirculation zone beneath the flame, thereby to draw the flame in a downward direction toward the melt. The reversed step is positioned within the divergent opening so that when the burner is in use, a secondary recirculation zone forms between the opening and the melt and further draws the flame in the downward direction toward the melt.
    Type: Grant
    Filed: December 15, 1994
    Date of Patent: October 1, 1996
    Assignee: The BOC Group, Inc.
    Inventor: Loo T. Yap
  • Patent number: 5520538
    Abstract: The temperature of articles in an "environmental" chamber is stabilized by evacuation of the "environmental" chamber, after having stabilized the temperature of such an article to approximate that of a controlled-temperature member spaced from the article by a small gap, to a pressure just sufficient to provide viscous gas behavior, adjusting the temperature of the article to closely match that of the member by gas conduction heat transfer across the gap, and evacuating the chamber to high vacuum.
    Type: Grant
    Filed: August 30, 1995
    Date of Patent: May 28, 1996
    Assignee: Brooks Automation, Inc.
    Inventor: Richard S. Muka
  • Patent number: 5280495
    Abstract: A furnace refractory extraction system and method includes a selectively removable bottom portion which is attached to a refractory extraction device associated with a container for drawing the refractory lining of a coreless induction furnace into the container. A plug portion in the furnace bottom is selectively removable to provide access to a bottom wall of the refractory lining. An opening is made in the bottom wall of the lining through which an extractor shaft is inserted and then attached to the removable bottom portion of the furnace bottom. The other end of the shaft is attached to a piston and cylinder assembly associated with the container at the open end of the furnace. When the piston and cylinder assembly is powered, the lining is drawn into the container.
    Type: Grant
    Filed: February 14, 1992
    Date of Patent: January 18, 1994
    Assignee: Ajax Magnethermic Corporation
    Inventors: George Havas, Jose A. Garcia
  • Patent number: 5273424
    Abstract: A vertical heat treatment apparatus has a reaction furnace, gas-introducing mechanism, a gas-exhausting mechanism, and temperature-sensing means. The reaction furnace is made up of a reaction tube and a heating mechanism. The reaction tube contains a plurality of objects which are to be treated and which are arranged at predetermined intervals. The heating mechanism is arranged outside of the reaction tube. The gas-introducing means introduces a gas into the reaction tube, and the gas-exhausting mechanism exhausts the gas from the reaction tube. The temperature-sensing mechanism includes a guide pipe which passes through the side wall of the reaction tube and which extends along the inner wall of the reaction tube in the longitudinal direction of the reaction tube. One end of the guide pipe is closed and is located inside the reaction tube, while the other end thereof is open and is located outside of the reaction tube. A bendable temperature-measuring device is inserted in the guide pipe.
    Type: Grant
    Filed: August 13, 1992
    Date of Patent: December 28, 1993
    Assignee: Tokyo Electron Sagami Limited
    Inventor: Jun-ichi Kobayashi
  • Patent number: 5189963
    Abstract: The operation of a combustible atmosphere furnace is controlled by monitoring the temperature of the combustible atmosphere, and the rate-of-change thereof. The measured rate-of-change is compared to a previously determined safe rate-of-change so as to anticipate and discourage incipient internal ignition.
    Type: Grant
    Filed: September 30, 1991
    Date of Patent: March 2, 1993
    Inventor: Carlton B. Mann
  • Patent number: 5149265
    Abstract: A method for providing uniform temperature in a furnace, such as a soaking pit or a reheat furnace is disclosed. Temperatures at a front wall and a burner wall within the heating chamber are constantly monitored by a computer, and the computer operates a direct-fired burner, or for example, a pair of regenerative burners, in one of two modes to place heat either at the front wall or the burner wall. The burner is oversized in relation to a maximum firing rate required by the heating chamber design. To heat the front wall, an impulse firing mode is initiated by the computer wherein the burner is fired at its full, overrated capacity for a time proportionally less than a normal firing cycle. To heat the burner wall, the computer initiates a proportional firing mode wherein the burner is fired for the full normal cycle, but at a rate which is equivalent to the actual firing rate demand calculated by the computer.
    Type: Grant
    Filed: May 31, 1991
    Date of Patent: September 22, 1992
    Assignee: Bloom Engineering Company, Inc.
    Inventor: Harry P. Finke
  • Patent number: 5143626
    Abstract: The invention discloses an apparatus and process for destroying pathogens and dehydrating streams of waste in one, continous process. More particularly, the invention contains an auger with specially modified, variably angled blades which agitates a stream of waste. Also, contained in tandem with the auger, a series of variably angled infrared radiate elements are positioned above the augar exposing the moving stream of waste to radiation. Thus, as the waste stream is transported along, the auger blades continually expose the waste stream to the radiation, thereby killing the entrapped pathogens and evaporating the insitu water. Further, the auger and infrared radiation heater elements are encased in a sealed trough, thus sealing in the heat being generated by this process. By sealing the trough, the heat provides excess energy to aid in destroying pathogens and evaporating the insitu water contained in the waste stream, until the water content is less than or equal to five per cent (5%) by unit volume.
    Type: Grant
    Filed: July 10, 1990
    Date of Patent: September 1, 1992
    Assignee: Sludge Drying Systems, Inc.
    Inventor: James E. Nugent
  • Patent number: 5110287
    Abstract: A gas burner assembly for a baking furnace is described. It includes a burner tube having an open outer end and an open inner end, with the inner end being arranged to extend through an opening in a furnace wall. A connector is provided for connecting the burner tube to a fuel supply and an infra-red pyrometer is mounted at the outer end of the tube. The pyrometer is axially aligned with the burner tube such that in use the pyrometer is sighted axially through the burner tube and onto an internal furnace wall. This gas burner assembly is particularly useful for heating the flue of a ring furnace used in the production of carbon anodes in the aluminum industry.
    Type: Grant
    Filed: May 9, 1991
    Date of Patent: May 5, 1992
    Assignee: Alcan International Limited
    Inventors: Collin B. P. MacPherson, Graham N. Jefferson
  • Patent number: 5099442
    Abstract: A temperature control apparatus of a learning type for a furnace which runs repetitively with a certain operating pattern of temperature change with time. The apparatus has a dual system model with respect to an enlarged system consisting of the furnace and its controller. For each cycle of the repetition of the certain operating pattern, adjustment input (r) is calculated by using the dual system model and the error between the preset temperature values (r) for the pattern and the actual inside temperatures (y) of the furnace, which adjustment input (r) is applied to the enlarged system to cause the inside temperatures (y) to track the preset temperature values (r). After each cycle of operation, the adjustment input (r) is renewed using the latest value of the above error.
    Type: Grant
    Filed: October 30, 1990
    Date of Patent: March 24, 1992
    Assignees: Ohkura Electric Co., Ltd., Katsuhisa Furuta
    Inventors: Katsuhisa Furuta, Iwao Ashahi, Akinori Ito, Nobuhisa Akaba, Chitoshi Yamada
  • Patent number: 5044938
    Abstract: Disclosed is a method of controlling the temperature of a joining area between two different strip materials in a continuous strip processing line. In the case where a strip material after the joining area requires a nozzle pressure greater than that of a preceding strip material, the opening of a damper is initially gradually throttled, at a timing before the joining area passes through a predetermined location in a treating furnace, by an amount required for changing the nozzle pressure so that an optimum pressure of the preceding strip material is changed so that of the following strip material. The rotational speed of a recirculation fan is then raised to keep the nozzle pressure substantially constant, and the damper is rapidly opened to the opening before the throttling at a time the joining area passes through the predetermined location.
    Type: Grant
    Filed: October 2, 1990
    Date of Patent: September 3, 1991
    Assignee: Chugai Ro Co., Ltd.
    Inventors: Masao Tanabe, Hiroshi Shirono
  • Patent number: 4964798
    Abstract: 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 cover and within the vacuum shell to remove the ambient gas. Nitrogen is then introduced into the inner cover and within the vacuum shell. The vacuum shell is then removed and purging continues within the inner cover either with nitrogen or other desired atmosphere gas, and finally furnace is emplaced over the inner cover to heat treat the work in a conventional manner.
    Type: Grant
    Filed: June 12, 1989
    Date of Patent: October 23, 1990
    Inventor: Calvin C. Blackman
  • Patent number: 4921422
    Abstract: This disclosure is directed to a method for controlling the preheating zone of a tunnel kiln which includes firing and cooling zones. The method comprises forcedly blowing air from the entire ceiling portion of the preheating zone in the downward direction to diffuse hot combustion gas present in the upper portion and to reducing a difference in temperature between the upper and lower portions of the preheating zone. Air may be blown into the preheating zone at a flow rate determined from the quantity of the combustion gas within the preheating zone.
    Type: Grant
    Filed: May 3, 1989
    Date of Patent: May 1, 1990
    Assignee: Toto, Ltd.
    Inventors: Tatsuhiro Kosugi, Takeshi Ogawa, Norio Tanaka
  • Patent number: 4910684
    Abstract: To facilitate a smooth and quick start-up of a rotary kiln, a Fuzzy Logic Control system is proposed, the principal feature of which is to mandate control actions to decrease the specific heat consumption along a straight line from an initial high value to a steady-state value established for the kiln, and then to switch over to an existing steady-state fuzzy logic control mode. In the start-up phase, further process variables are preferably measured and monitored against reference values to mandate concurrent control actions influencing the Fuzzy Logic Control system in a weighted manner.
    Type: Grant
    Filed: August 5, 1988
    Date of Patent: March 20, 1990
    Assignee: F. L. Smidth & Co. A/B
    Inventors: Jens J. Ostergaard, Klaus Gadeberg
  • Patent number: 4834644
    Abstract: A plurality of burners are provided for burning a combustible gas mixture. A conduit extends to each of the burners for supplying a combustible gas mixture thereto. A mixing device is coupled between the conduit and a source of air and a source of combustible gas for mixing combustible gas and air for flow to the conduit. An air valve is coupled between the source of air and the mixing device for controlling the flow of air to the mixing device. First and second gas valves are coupled between the source of combustible gas and the mixing device. A control circuit is provided which is adapted to be operated in a flame intensity cycle of high/low flame or in a burner on/off cycle. In the flame intensity cycle, flow of air through the air valve is cyclically increased and decreased and gas flows continuously through the second gas valve for cyclically increasing and decreasing the flame intensity at each of the burners.
    Type: Grant
    Filed: February 24, 1987
    Date of Patent: May 30, 1989
    Assignee: Snow Corporation
    Inventor: Bill D. Snow
  • Patent number: 4773850
    Abstract: A manufacturing method and apparatus is provided for making building and other types of brick. The apparatus requires a minimum of excess (or surge) production, utilizes automated equipment which is highly dependable and which is easily operated and controlled. The apparatus comprises an automated low profile dryer and kiln in conjunction with an automated brick handling system including specially designed lighweight kiln cars.
    Type: Grant
    Filed: August 14, 1987
    Date of Patent: September 27, 1988
    Assignee: Swindell Dressler International Corporation
    Inventors: James D. Bushman, Marion A. Rogallo
  • Patent number: 4755137
    Abstract: A process and apparatus for maintaining the lining of a furnace shell (1) comprising a bottom and a side wall and supported by a floor (2). The shell (1) is composed of two parts adapted to be separated and constituting respectively a bottom (11) and a cooled side wall (12). The side wall (12) is supported directly on a work floor (2) and the bottom (11) on a support (5) movable vertically between an upper operating position of the bottom (11), in line with the side wall (12), and a lower position. After the bottom (11) has been lowered into the lower position, it is moved out of the axis (10) of the furnace to a maintenance station, from which a new bottom (11') is then brought into the lower position, in the axis (10) of the furnace, in order finally to be raised to the upper operating position. The invention applies particularly to arc melting furnaces for steel production.
    Type: Grant
    Filed: December 9, 1986
    Date of Patent: July 5, 1988
    Assignee: Clecim
    Inventors: Jacques Barbe, Robert Vatant
  • Patent number: 4737315
    Abstract: Radioactive organic wastes, such as granular or powdered ion exchange resins and organic filter aids, are treated by oxidation decomposition using hydrogen peroxide in the presence of iron ions in an aqueous medium under refluxing an effluent which is condensed from evaporated components during the oxidation. Condensed water containing a very small amount of organic matter is obtained.
    Type: Grant
    Filed: December 18, 1986
    Date of Patent: April 12, 1988
    Assignee: JGC Corporation
    Inventors: Kazunori Suzuki, Akihiro Yamanaka, Hiroshi Kuribayashi
  • Patent number: 4726764
    Abstract: A heat treating apparatus which comprises a core tube for containing a material to be treated, a heating furnace surrounding the core tube, core tube gas supply means for supplying gas into the core tube, furnace gas supply means for supplying gas into a furnace body of the furnace, differential pressure detecting means for detecting the differential pressure between the pressure in the core tube and the gas pressure in the body, and differential pressure regulating means for regulating the differential pressure between the gas pressure in the core tube and the gas pressure in the body on the basis of a differential pressure signal from the detecting means. The apparatus is operated by regulating the gas pressure in the core tube so that the differential pressure between the gas pressure in the core tube and the gas pressure in the body fall within a tolerable range, thereby preventing the core tube from deforming.
    Type: Grant
    Filed: May 21, 1986
    Date of Patent: February 23, 1988
    Assignee: The Furukawa Electric Co., Ltd.
    Inventor: Terunao Yoshikai
  • Patent number: 4681616
    Abstract: A glass sheet tempering method and system (10) disclosed utilizes a heating chamber (22) and a quenching chamber (26) which contain ambients at superatmospheric pressure during both the heating and quenching. Forced convection heating is preferably performed in an improved furnace (14"). In one embodiment, heated gas flow is provided by centrifugal blowers which blow air across a plurality of spaced heat tubes. The heated gas flow is directed toward a glass sheet positioned within the heating chamber to provide rapid heating of the glass sheet. In a second embodiment, the heated gas flow is provided by upper and lower sets of opposed gas jet pumps connected to a gas supply. A pressure gas supply including a compressor maintains the superatmospheric pressure of the heating and quenching chambers (22,26). A recirculating gas supply (32) feeds compressed quenching gas to opposed blastheads (28,30) to perform the tempering.
    Type: Grant
    Filed: May 15, 1986
    Date of Patent: July 21, 1987
    Assignee: Glasstech, Inc.
    Inventor: Harold A. McMaster
  • Patent number: 4678432
    Abstract: A heat treatment method in which a heating furnace is preliminarily heated before carrying an object to be heat-treated in the furnace and an unit heating process is repeated at least twice according to an output program for controlling an output of a heating light source which is stored in a memory so that the heat treatment is uniformly applied to every object to be heat treated.
    Type: Grant
    Filed: September 5, 1985
    Date of Patent: July 7, 1987
    Assignee: Dainippon Screen Mfg. Co., Ltd.
    Inventor: Hideyuki Teraoka
  • Patent number: 4666402
    Abstract: A method and a device for scrap preheating by means of hot steel furnace exhaust gases. A scrap bucket permits passage of gaseous medium therethrough and is closed by a cover with an exterior waterseal by providing an intermediate annular space having a controlled inlet for a purging medium which is connected to a pressure sensing means in the intermediate space. Purging medium is supplied to the intermediate space at a pressure not substantially less than the pressure in the inlet space in the bucket, so that all leakage is primarily the purging medium which flows outwardly to an outlet space. In a preferred embodiment the purging medium is recycled from the outlet space.
    Type: Grant
    Filed: May 12, 1986
    Date of Patent: May 19, 1987
    Assignee: Flakt AB
    Inventor: Gunnar Wilhelmsson
  • Patent number: RE36921
    Abstract: A manufacturing method and apparatus is provided for making building and other types of brick. The apparatus requires a minimum of excess (or surge) production, utilizes automated equipment which is highly dependable and which is easily operated and controlled. The apparatus comprises an automated low profile dryer and kiln in conjunction with an automated brick handling system including specially designed lighweight kiln cars.
    Type: Grant
    Filed: September 5, 1997
    Date of Patent: October 17, 2000
    Assignee: Swindell Dressler International Corporation
    Inventors: James D. Bushman, Marion A. Rogallo