Work Chamber Having Gaseous Material Supply Or Removal Structure Patents (Class 432/200)
  • Patent number: 4892083
    Abstract: A baking oven has a baking chamber (2) which is at both of its sides separated from air channels (12) by partitions (11) being provided with air passage openings (30). The air channels (12) are connected to air supply channels (24) which are supplied with warm air by a blower (14) via a switching equipment (25) being centrally arranged relative to the cover wall (10) of the baking chamber (2), said switching equipment having preferably the shape of a flap (27) being swivellable around a horizontal axis. On account thereof, the baking chamber (2) is uniformly supplied with warm air which flows through the baking chamber (2) in horizontal and alternating direction (FIG. 1).
    Type: Grant
    Filed: October 18, 1988
    Date of Patent: January 9, 1990
    Inventor: Helmut Konig
  • Patent number: 4706651
    Abstract: A solar powered kiln is provided, that is of relatively simple design and which efficiently uses solar energy. The kiln or solids reactor includes a stationary chamber with a rearward end which receives solid material to be reacted and a forward end through which reacted material is disposed of, and a screw conveyor extending along the bottom of the chamber for slowly advancing the material between the chamber ends. Concentrated solar energy is directed to an aperture at the forward end of the chamber to heat the solid material moving along the bottom of the chamber. The solar energy can be reflected from a mirror facing at an upward incline, through the aperture and against a heat-absorbing material near the top of the chamber, which moves towards the rear of the chamber to distribute heat throughout the chamber.
    Type: Grant
    Filed: February 24, 1986
    Date of Patent: November 17, 1987
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: Bernard D. Yudow
  • Patent number: 4487576
    Abstract: To separate combustion within a combustion chamber for deburring or high-temperature, high-pressure article treatment from gas supply valves, the combustion chamber is formed of a dual wall structure, having an outer wall (21) which is telescopically slidable with respect to an inner wall (12). The articles are introduced into the chamber (11) by placing a support plate (14) against the outer wall structure, with the inner wall (12) slightly raised, leaving a gap (23) between the lower edge of the inner wall and the support plate. Gas introduced within the outer wall structure than can pass into the chamber (11) within the inner wall, through said gap. When the requisite volume and pressure of fill gas--typically oxygen and a combustion gas such as hydrogen, methane or the like--is within the chamber, the inner wall (12) is lowered into sealing engagement with the support plate (14), for ignition of the combustible mixture.
    Type: Grant
    Filed: January 26, 1983
    Date of Patent: December 11, 1984
    Assignee: Robert Bosch GmbH
    Inventor: Helmut Martini
  • Patent number: 4482315
    Abstract: An auxiliary wood furnace for a bulk curing tobacco barn is arranged for installation in a basement immediately below the conventional oil or gas fired furnace for ease of barn modification and adaptation to burning wood as the source of heat.
    Type: Grant
    Filed: September 12, 1983
    Date of Patent: November 13, 1984
    Inventor: Harding W. Day
  • Patent number: 4354829
    Abstract: The rate of calcining carbonaceous material in a rotary kiln is increased by enriching with oxygen air supplied into the kiln by fans. The introduction of oxygen is effected during a predetermined portion of each kiln revolution and is effective to enrich the oxygen content of air supplied to the kiln to approximately 23-25% oxygen. By so enriching the interior kiln atmosphere during calcining of material such as petroleum coke, greater temperatures are obtained than will be obtained by the use of air alone thereby accelerating the evolution of volatile materials and the combustion of such volatiles during calcination. The accelerated evolution and combustion of volatiles enables the rate at which carbonaceous material is calcined in a kiln of a given length to be increased.
    Type: Grant
    Filed: April 29, 1981
    Date of Patent: October 19, 1982
    Assignee: Airco, Inc.
    Inventor: James W. Estes
  • Patent number: 4337033
    Abstract: Masonry units are cured in a kiln having a gaseous atmosphere including water vapor. A portion of this atmosphere is withdrawn and mixed with a flowing stream of heated water. This mixture is injected into a body of water disposed within the kiln at a plurality of spaced apart locations and beneath the surface of the body of water whereupon the gaseous atmosphere is heated and rises to and escapes from the surface of the body of water in the form of bubbles. In a preferred embodiment, the apparatus for withdrawal of atmosphere from the kiln includes an aspirator incorporated in a conduit which also circulates heated water to the body of water within the kiln.
    Type: Grant
    Filed: January 2, 1981
    Date of Patent: June 29, 1982
    Inventor: Bob R. Drain
  • Patent number: 4310301
    Abstract: A carbottom furnace is described as having high velocity or high momentum-type stoichiometric burners, rather than excess air-type burners. Hot exhaust gas, removed from the furnace, is recirculated immediately back to the heat treatment chamber of the furnace, without reheating, in a manner which compliments and reinforces the swirling flow of gas created in the chamber by the high momentum burners. This recirculation of exhaust gas is especially useful during normal turndown of the burners to maintain sufficient volume of heated gas within the chamber to properly heat treat the articles or workpieces which are positioned within the chamber.
    Type: Grant
    Filed: November 19, 1980
    Date of Patent: January 12, 1982
    Assignee: Midland-Ross Corporation
    Inventors: Richard R. Mayers, Dennis A. Chojnacki
  • Patent number: 4210097
    Abstract: In a line for coating a ferrous base metal strip with a molten coating metal, the line being of the type having a preparation furnace for the strip comprising a direct fired furnace, a controlled atmosphere heating furnace, one or more cooling chambers and a snout leading beneath the surface of the molten coating metal bath, all in sealed relationship to each other, the improvement comprising a method and means for maintaining a non-oxidizing atmosphere at positive pressure within the entire preparation furnace during line stops. To this end, a retractable, refractory lined door means is provided in the conduit between the direct fired furnace and its exhaust fan to seal off the direct fired furnace from its exhaust fan and an air dilution opening in that conduit. Additionally, means are provided to add excess nitrogen flow to the preparation furnace to maintain a positive pressure therein.
    Type: Grant
    Filed: January 29, 1979
    Date of Patent: July 1, 1980
    Assignee: Armco Inc.
    Inventors: Fred Byrd, James A. Fisher
  • Patent number: 4162141
    Abstract: A variable air flow oven is disclosed in which a variable air directing control means delivers varying amounts of heated air under various positive pressures in an alternating pattern to jet orifices in opposite side walls of the oven in an inverse ratio. Hot air jets from opposite sides of the oven meet at a region of common velocity in the processing chamber to produce a turbulent mixing of the hot air in a vertical plane. The turbulent heated air travels from one side of the oven to the other substantially throughout a heating period under the controlled operation of a motor driven mechanical linkage arrangement to assure even baking, cooking or drying of the products being processed through the entire processing chamber in the oven. The system operates at a positive pressure at all times, so that the main supply of heated air flows through one side duct and a smaller volume of heated air flows through the opposite side.
    Type: Grant
    Filed: December 27, 1977
    Date of Patent: July 24, 1979
    Inventor: Clarence W. West
  • Patent number: 4148946
    Abstract: In a line for coating a ferrous base metal strip with a molten coating metal, the line being of the type having a preparation furnace for the strip comprising a direct fired furnace, a controlled atmosphere heating furnace, one or more cooling chambers and a snout leading beneath the surface of the molten coating metal bath, all in sealed relationship to each other, the improvement comprising a method and means for maintaining a non-oxidizing atmosphere at positive pressure within the entire preparation furnace during line stop. To this end, a retractable, refractory lined door means is provided in the conduit between the direct fired furnace and its exhaust fan to seal off the direct fired furnace from its exhaust fan and an air dilution opening in that conduit. Additionally, means are provided to add excess nitrogen flow to the preparation furnace to maintain a positive pressure therein.
    Type: Grant
    Filed: February 14, 1977
    Date of Patent: April 10, 1979
    Assignee: Armco Steel Corporation
    Inventors: Fred Byrd, James A. Fisher
  • Patent number: 4032290
    Abstract: A muffle seal for a high temperature furnace in which a quartz or similar muffle is attached to an associated metal structure to provide substantial sealing of gas in the muffle even at extremely high operating temperatures. As employed in a multi-zone furnace having a high temperature quartz muffle section and a lower temperature metal muffle section joined thereto via a gas or gas and heat barrier, the quartz muffle is joined to the barrier by a peripheral chamber provided around the end of the quartz muffle confronting the barrier, the chamber being sealed to surfaces of the muffle and the barrier by porous gaskets. A sealing gas is introduced at above atmospheric pressure to the peripheral chamber, the gas being controllably transmitted through the porous gaskets to provide isolation against leakage of gas within the quartz muffle. The novel seal can also be employed to join quartz and metal muffle sections without a barrier therebetween.
    Type: Grant
    Filed: May 24, 1976
    Date of Patent: June 28, 1977
    Assignee: BTU Engineering Corporation
    Inventors: Martin I. Soderlund, R. Chester Pray
  • Patent number: 4032289
    Abstract: A convection oven of the rack type for treating goods, e.g., baking bread, including a rotating duct which sequentially delivers heated air to a series of ducts which distribute the heated air across the oven chamber according to a flow pattern which provides uniform treatment of the goods while maintaining the goods and the rack stationary with respect to the oven chamber.
    Type: Grant
    Filed: September 8, 1975
    Date of Patent: June 28, 1977
    Assignee: Despatch Industries, Inc.
    Inventors: David E. Johnson, Terrance E. Polsfuss