Steam Or Hot Water Patents (Class 126/20)
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Patent number: 5732614Abstract: A food processing apparatus includes a cabinet defining a food processing compartment accessible through a front access opening, and has a door hinged on the cabinet for movement between open and closed positions relative to the access opening. The door includes inner and outer door panels pivotally interconnected to enable access between the panels. The inner and outer door panels have aligned windows with the windows on the inner panel being larger so as to enable light from lights mounted on the inside of the outer panel to illuminate the processing compartment without glare to the operator. Other features of the invention enable better control of zoned heating within the processing compartment when used in either convection steam or convection hot air modes of operation.Type: GrantFiled: February 10, 1997Date of Patent: March 31, 1998Assignee: Delaware Capital Formation, Inc.Inventor: G. Robert Oslin
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Patent number: 5715745Abstract: The present invention is a food storage cabinet that develops and maintains a warm, humid environment in its interior for storage of the food. The food is supported within a storage compartment in the cabinet, and a water bath is provided to produce the warm, humid environment to keep the food warm and moist. A support is positioned within the storage compartment at an angle so that when the door to the storage compartment is opened, ambient air enters the storage compartment and initiates air flow therein. The ambient air drops down through a front gap between the support and the front wall of the storage compartment, thus causing warm, humid air generated by the water bath to rise through a rear gap and "roll" over the food toward the front of the storage compartment. Therefore, by opening the door to the storage compartment, air flow is initiated within the storage compartment to quickly cover the food in warm, humid air.Type: GrantFiled: April 11, 1997Date of Patent: February 10, 1998Assignee: Food Service Supplies, Inc.Inventors: Robert L. Blanton, Jr., Ted Y. Prosalenti
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Patent number: 5680810Abstract: The present invention features a toaster oven that can both steam and heat food. While this toaster oven works in the traditional sense, it also has the capability of rapidly generating and introducing steam into the cooking chamber. The steam is generated in a water tube or a boiling pan that is placed adjacent the toaster oven's infrared heating coils. Water for making steam is introduced into a reservoir located in the toaster oven's housing. The reservoir can be either permanently situated in the housing, or it can be of the removable, refillable type, that is, a container that can be filled and cleaned periodically. A microprocessor controls both the steam generation and the heating cycles. The microprocessor is operative via a computer routine that monitors sensors that are positioned about the housing of the toaster oven. The microprocessor also meters the water flowing from the reservoir into the water tubes or boiling pan.Type: GrantFiled: December 2, 1996Date of Patent: October 28, 1997Inventor: John C. K. Sham
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Patent number: 5673613Abstract: A substantially smokeless cooker is disclosed. The cooker includes a housing having a cooking chamber therein. A first heating element including at least one resistive element is carried in the cooking chamber to supply heat directly to food positioned adjacent thereto for cooking thereof. A steam producing apparatus independent of the first heating element is provided for producing steam. The vapors in the steam are disposed for permeating the food to provide moisture thereto during the cooking thereof.Type: GrantFiled: August 18, 1995Date of Patent: October 7, 1997Inventor: Gary W. Price
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Patent number: 5653164Abstract: A steam generator for use in a convection oven comprising a plurality of first and second spherically shaped heat accumulator elements arranged alternately in a substantially vertical plane in which the first layer contains at least one row of the heat accumulating elements integrally joined together at a central axis and the second layer contains at least two rows of the heat accumulating elements integrally joined together at a central axis, and a convection oven employing the steam generator are disclosed.Type: GrantFiled: November 7, 1994Date of Patent: August 5, 1997Assignee: Premark FEG L.L.C.Inventor: Serge C. Vallee
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Patent number: 5649528Abstract: A drain assembly is disclosed for use in a steamer type food processing apparatus having an oven chamber into which steam is introduced and from which steam bubbles may escape with condensate through a drain line. The drain assembly includes a tubular body having a longitudinal flow passage defining an inlet end adapted to receive steam droplets and condensate from the oven chamber, an outlet end enabling discharge of condensate from the flow passage, a quenching fluid inlet tube and splash plate operative to create a fluid screen across the flow passage downstream from said inlet end, a vent tube intersecting the flow passage downstream from the quenching fluid inlet to enable escape of vapor from the flow passage, and an overflow tube connected to said flow passage and configured to create a fluid trap within the overflow tube. The overflow tube allows backed-up condensate within the longitudinal flow passage to be discharged from the overflow tube in the event the discharge end is blocked.Type: GrantFiled: May 21, 1996Date of Patent: July 22, 1997Assignee: Delaware Capital Formation, Inc.Inventors: G. Robert Oslin, Edward Droho
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Patent number: 5640946Abstract: Atmospheric convection type steamer apparatus includes at least one oven chamber and a discrete atmospheric steam generator operative to provide steam to the even chamber. A quiescent low fire power input to the steam generator maintains water in the steam generator at its boiling temperature during a non-cooking mode and provides a continuous steam flow into the oven chamber to maintain the chamber in a ready condition for substantially instantaneous steam heating when a cooking or high fire mode is initiated. In a stacked double oven embodiment, each oven chamber has a discrete atmospheric steam generator maintained at a quiescent low fire power input sufficient to maintain the water at its boiling temperature and effect a continuous ready condition within the corresponding oven chambers. Steam lines directly connect the oven chambers to their corresponding steam generators and enable introduction of cleaning and deliming agents directly into the steam generators from within the oven chambers.Type: GrantFiled: March 22, 1995Date of Patent: June 24, 1997Inventor: G. Robert Oslin
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Patent number: 5636622Abstract: A commercial gas oven has as its only source of heat for heating and for steam generating an extended mesh-type burner and a sealed combustion chamber. The oven works in five cooking modes reaching steam saturation below 100.degree. C. and a high humidity up to 250.degree. C., combining air convection from a central turbine and the steam which is generated into the oven. At least one steam generator duct conveys the combustion fumes around a central turbine on whose surface falls the water sprayed from a sprayer linked to the turbine. The fumes are recovered to contribute to heating the cooking chamber by means of a takeup box.Type: GrantFiled: June 18, 1996Date of Patent: June 10, 1997Assignees: Fagor, S Coop, Gas Natural SDG, S.A., Repsol Butano, S.A.Inventors: Eugenio Urcelay Amondarain, Miguel Maillo Martin, Eugenio Ayerbe Oyarbide
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Patent number: 5619983Abstract: An improved combination convection/steamer oven is provided that is capable of maintaining an optimum steam saturation level without quenching by equipping the steam generating system of the oven with an adjustable water supply source. When the oven is initially being brought up to the preselected cooking temperature, a microprocessor controller uses a stored water flow rate profile to calculate the water flow rate required to prevent quenching yet enable a desirable rate of temperature increase. Once the oven has reached operating temperature, the microprocessor controller analyzes temperatures in a drain channel and the cooking cavity and, based on these parameters, calculates the water flow rate into the steam generating system required to optimize steam saturation in the cooking cavity. The steam generating system also has an improved atomizer including a rotating paddle wheel that is fed water from within by a sprayer fan.Type: GrantFiled: May 5, 1995Date of Patent: April 15, 1997Assignee: Middleby Marshall, Inc.Inventor: Mark J. Smith
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Patent number: 5617839Abstract: A rack oven which comprises a baking chamber, a door providing access to the baking chamber, a combustion chamber containing a plurality of in-shot burners, a heat exchanger in combination with the combustion chamber containing a plurality of heat exchange tubes, a steam generator, one or more blower fans for circulating air in a closed path throughout the oven, and a ventor exhaust blower for expelling combustion gases.Type: GrantFiled: February 26, 1996Date of Patent: April 8, 1997Assignee: Premark FEG CorporationInventors: Ralph E. Jennings, Philip Tiberio, Jr.
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Patent number: 5601013Abstract: An arrangement for generating steam in ovens, particularly baker's ovens, comprising a stand which carries a plurality of superposed and generally horizontally extending gutter means (8, 9) whose bottoms include a plurality of through-penetrating holes (11) which allow water to pass to underlying gutter means, and further comprising members (12) which are mounted adjacent the holes and which partially covering the holes. The members (12) have an elongated form and extend through holes (11) in at least two gutter means (8, 9) arranged one above the other, and the cross-sectional area of the members (12) in the hole region is smaller than the cross-sectional areas of the gutter means.Type: GrantFiled: November 13, 1995Date of Patent: February 11, 1997Assignee: Sveba-Dahlen ABInventors: Lennart Larsson, Jonas Persson
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Patent number: 5552578Abstract: An oven for cooking foodstuffs includes an airtight enclosure having an opening closed by a door. Water condensing in the enclosure is collected in the lower part of the enclosure and discharged into discharge pipes. An excess steam circuit captures excess steam escaping from the enclosure and feeds the captured steam to a treatment system including a steam condenser to convert it into liquid condensates. The liquid condensates are collected and discharged into discharge pipes. At least one heater heats steam passing through it in the excess steam circuit on the upstream side or on the downstream side of the steam condenser.Type: GrantFiled: October 12, 1994Date of Patent: September 3, 1996Assignee: Societe Cooperative de Production Bourgeois societe cooperative de production anonyme a capital variableInventor: Raymond Violi
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Patent number: 5549038Abstract: A modulated steam cooker in which food to be cooked is received in an oven chamber having an access door associated with a door switch, steam being fed directly into the oven by a steam generator having an electric heater immersed in a pool of water. The heater is connected through the door switch to a power source whereby the generator is powered only when the door is shut. The pressure of steam draining from the oven is sensed by a pressure-responsive switch interposed between the heater and the power source, the pressure switch intermittently interrupting the power supplied to the heater only when the sensed pressure exceeds a predetermined level somewhat above atmospheric pressure, thereby modulating the generation of steam supplied to the oven as a function of the quantity and temperature of food therein to effect efficient cooking of the food. Mounted on the steam generator is a spray head supplied with water only when the door is opened.Type: GrantFiled: November 16, 1995Date of Patent: August 27, 1996Assignee: Market Forge IndustriesInventor: Albert Kolvites
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Patent number: 5532456Abstract: Disclosed is a temperature and humidity controllable doorless oven for cooking, warming and storing food products for extended periods of time. The oven includes a cabinet having interior walls and exterior walls which form an air duct between the walls. An interior oven chamber is formed within the interior walls with the cabinet providing an access opening into the interior oven chamber. A controllable heating element generates a warm environment inside the interior oven chamber and a humidifier generates a moist environment. To maintain the warm and moist environment inside the interior oven chamber, an air stream which forms an air curtain is moved through the air duct and across the access opening.Type: GrantFiled: March 2, 1995Date of Patent: July 2, 1996Assignee: The Delfield CompanyInventors: Wayne W. Smith, Thomas J. Frick, Earl H. Moore
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Patent number: 5530223Abstract: The invention relates to a convection and steam oven for food with an oven chamber and an auxiliary chamber partitioned-off from this in which are arranged a motor-driven, radial-action fan and several heating elements surrounding the fan, with a pre-atomization element mounted on and rotating with the hub of the fan to which is optionally supplied water from a pipe. In order to maximize pre-atomization efficiency, the pre-atomization element is arranged as a separate body with a convex surface on the hub of the fan.Type: GrantFiled: August 5, 1994Date of Patent: June 25, 1996Assignee: Angelo Po Grandi Cucine S.p.A.Inventors: Marco Culzoni, William Vezzani
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Patent number: 5517980Abstract: A steam-operated food cooking oven having a cooking cavity (2), a motor-driven fan (3) located at a rear side of the cooking cavity, and a partition wall (4) to distribute the flow of air generated by the fan into the cooking cavity. A back-chamber (5) accommodates the fan and is delimited on its front side by the partition wall (4) and, on its rear side, by the rear wall (6) of the oven. A tube (9) extends into the back chamber and terminates in a nozzle (10) that is received in an interstice between the rear wall and the fan. An appropriate temperature sensor (11), which is connected to a thermostat device (12), is inserted in the tube (9). A perforated disk is mounted over a motor shaft within the fan and allows air and steam within the back chamber to flow into the interstice and the nozzle therein to thereby communicate with the tube and temperature sensor therein.Type: GrantFiled: October 31, 1994Date of Patent: May 21, 1996Assignee: Zanussi Grandi Impianti S.p.A.Inventors: Massimo Cappello, Bruno Levi
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Patent number: 5515773Abstract: A steam oven includes a chamber for receiving food, a water tank having a discharge valve, and a reservoir in communication with the water tank and the chamber. A barrier divides the reservoir in a receiving compartment and a separate boiling compartment. A passage in the barrier allows the receiving compartment and the boiling compartment to fluidly communicate with each other. In use, water flows from the water tank into the receiving compartment, and then from the receiving compartment into the boiling compartment to be converted into steam. The barrier retards heat transfer from the water in the boiling compartment to the water in the receiving compartment to prevent the water in the receiving compartment from becoming agitated to an extent where air would be allowed to flow through the discharge valve into the water tank, thereby causing an untimely release of water from the water tank into the reservoir.Type: GrantFiled: February 16, 1995Date of Patent: May 14, 1996Assignee: The Rival CompanyInventor: Charles R. Bullard
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Patent number: 5512312Abstract: An oven for cooking and browning foods has heated, radiant walls. Heat may be supplied by a gas burner flame in a plenum behind the walls, with products of combustion thus being isolated from the food in the oven chamber. In one embodiment food products are continuously conveyed through the oven chamber and are either cooked or simply browned in the oven by the radiant wall heat. Fats and other materials rendered from the food products, if not fully incinerated in the oven chamber, may be transferred along with exhaust air from the oven chamber to a separate combustion chamber, for incineration. Steam or other inert gas is introduced to the oven chamber to minimize oxidation and prevent flame. An alternative wall heating system uses electric resistance heat elements inside a thin ceramic wall. In another embodiment a web-like metal conveyor of a radiant wall oven is returned through the oven in order to heat the conveyor sufficiently to put grill stripes on a product being browned, such as meat.Type: GrantFiled: December 14, 1994Date of Patent: April 30, 1996Inventors: Robert B. Forney, Ernest C. Brown
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Patent number: 5460158Abstract: An oven comprises an enclosure in which an intermediate wall separates a first part for containing materials to be cooked from a second part containing the functional units of the oven and in particular a fan and a burner. The burner is on the downstream side of the fan in the direction of the flow of air caused by the fan and the flame that it produces is oriented transversely to the direction of air flow. The burner outlet orifices are oriented to allow any water condensing in the burner to drain out by gravity. The intermediate wall is removable for cleaning. This maximizes the volume of the first enclosure part and considerably facilitates cleaning of the functional units of the oven, without disturbance to the operation of the burner.Type: GrantFiled: January 25, 1994Date of Patent: October 24, 1995Assignee: Societe Cooperative de Production BourgeoisInventor: Andre Rigaud
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Patent number: 5447145Abstract: A food cooking oven having a vertically hinged access door 1 provided with an exterior glazing 2, and an inner door 3 arranged on the inner face of said door. The inner door is provided with a hinge 4 along the hinging edge of the access door 1 to the oven housing and is able to be turned with respect to the hinge to a position which is moved away and separated from said access door. The oven also includes a gutter 6 for collecting condensation water and other drippings. The gutter runs along the lower edge of the access door and is provided with a liquid shut-off means 7. A liquid collecting element 11 is arranged so as to protrude from the lower side 10 of the oven cavity opening perimeter, in a position lying underneath said liquid shut-off means, the latter being normally shut when the oven door is open, and adapted to close automatically when the door is being closed.Type: GrantFiled: September 9, 1994Date of Patent: September 5, 1995Assignee: Zanussi Grandi Impianti S.P.A.Inventors: Massimo Cappello, Bruno Levi
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Patent number: 5441034Abstract: A steam cooking device is described which contains a steam generating chamber having a heat exchanger therein. The heat exchanger is provided with baffles comprised of raised surface projections to create turbulent flow of flue gases through the heat exchanger which results in more efficient heating of the water in the steam generator chamber to create steam for use in cooking.Type: GrantFiled: May 19, 1994Date of Patent: August 15, 1995Assignee: Cleveland Range, Inc.Inventors: James P. Bedford, Wayne S. Hollingshead
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Patent number: 5402709Abstract: A method and apparatus are disclosed for detecting the presence of steam in a volume of air at a predetermined temperature. The apparatus includes a temperature sensor having two respective temperature build-up times representing an under steam temperature build-up time and an under air temperature build-up time. The method for detecting the presence of steam comprises the steps of placing the temperature sensor in the presence of the volume air, such that the sensor can reach a predetermined set point temperature that is lower than the predetermined temperature, taking a temperature measurement with the sensor, and determining if the measured temperature reaches the set point temperature in order to indicate whether the sensor is in the presence of steam.Type: GrantFiled: July 22, 1992Date of Patent: April 4, 1995Assignee: Cogia, Societe AnonymeInventors: Didier Carron, Philippe Deblay, Robert R. DeSage
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Patent number: 5363748Abstract: A cooking device including a upper unit having an upper grilling plate hingeably attached to a lower unit having a lower grill plate. The upper unit movable relative to the lower unit from an open position to a closed position to form an enclosed cooking chamber to cook foodstuffs. The lower grill plate includes a well to contain liquid and a heating unit for heating the well to vaporize the liquid during cooking and supply vapor to the cooking chamber.Type: GrantFiled: January 15, 1993Date of Patent: November 15, 1994Assignee: Tsann Kuen USA, Inc.Inventors: Michael W. Boehm, Robert W. Johnson
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Patent number: 5301652Abstract: A condensing apparatus for a steam cooking device comprising a heat exchanger for collecting steam from the cooking chamber of a steam cooking device and means for condensing the steam in the heat exchanger.Type: GrantFiled: July 31, 1991Date of Patent: April 12, 1994Assignee: Cleveland Range, Inc.Inventors: Thomas J. Willis, James P. Bedford
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Patent number: 5272963Abstract: An arrangement measures humidity in ovens, in particular fan-assisted food-cooking ovens which have a cooking cavity (8) and a separate cavity (10) that houses a cooling fan and is separated from the first cavity by a partition wall (9). The arrangement includes a body (13) made of highly heat-conductive metal, which passes through the partition wall (9) and has ends (17, 18) introduced in the cooking cavity (8) and the separate cavity (10), respectively. The arrangement also includes a heat-sink provision (19, 28, 32) connected with the end (18) of said metal body (13), and three temperature sensors (21, 22, 26) that are adapted to measure the temperatures of said two ends (17, 18) and the cooking cavity (8), respectively.Type: GrantFiled: April 26, 1993Date of Patent: December 28, 1993Assignee: Zanussi Grandi Impianti S.p.A.Inventor: Claudio Del Fabbro
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Patent number: 5235903Abstract: A cooking and holding food preparation unit is disclosed having one or more food receiving compartments each including a door and a gasket for hermetically sealing the compartment when the door is closed. An open-topped tray for holding water is located near the bottom of the compartment and has therebeneath electrical heating strips for heating water in the tray. A thermostat is coupled to the tray and to the heating strips for maintaining the temperature of the tray at an operator selected temperature typically well below the temperature at which water boils under standard conditions. A vacuum pump selectively reduces the air pressure within the compartment while a vacuum release valve selectively couples the compartment to the exterior atmosphere. There is a timer for measuring elapsed time after cooking is begun which functions to open the vacuum release valve upon the expiration of an operator determined time interval.Type: GrantFiled: March 17, 1992Date of Patent: August 17, 1993Inventor: Eugene R. Tippmann
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Patent number: 5233969Abstract: A food warmer unit for use in the field comprises a vessel having walls to form a chamber and a recloseable cover. An inlet port is in communication with the chamber as is an outlet port. The vessel also has a restricting means to hold food canisters in a submerged state within the chamber during use. The food warmer unit is readily connected to a portable heating unit to provide hot water in the chamber and a means to warm food canisters.Type: GrantFiled: April 9, 1992Date of Patent: August 10, 1993Inventor: Michael J. Koledin
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Patent number: 5215000Abstract: Process and apparatus are provided for cooking an alimentary substance within a walled enclosure under atmospheric pressure by means of steam entering into the enclosure. The method and apparatus provide for a first cooking step which includes the rapid increase of the temperature of the surface of the substance by means of superheated steam to preheat the substance, with the steam being supplied into the enclosure at a temperature above the boiling temperature of water and under atmospheric pressure; and a second cooking step which includes drying the surface of the substance and cooking it, in continuation of the first step.Type: GrantFiled: March 15, 1991Date of Patent: June 1, 1993Assignee: A.R.M.I.N.E.S.Inventors: Robert Desage, Patricia Fraile, Henri Renon
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Patent number: 5203258Abstract: An apparatus for heating food articles including a chamber containing a plurality of vertically, spaced-apart supports, each having a hollow interior which is interconnected by a single conduit. A thermostatically controlled steam generator is connected to the single conduit serving to both transmit steam to the supports and return condensate water back to the steam generator to thereby heat the food articles.Type: GrantFiled: February 12, 1992Date of Patent: April 20, 1993Inventors: Vincent P. Tippmann, Joseph R. Tippmann
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Patent number: 5200225Abstract: A machine and process for quickly baking pizza. Dry super-heated steam at about 600.degree. F. is flash-generated in one compartment of the machine by spraying water on metal plates. The steam passes to another compartment of the machine where the pizza rests on a hot metal plate. The pizza is quickly baked from the combined effects of the steam and the hot plate at a temperature in the range from about 650.degree. F. to 690.degree. F.Type: GrantFiled: May 9, 1991Date of Patent: April 6, 1993Inventor: Okan Apaydin
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Patent number: 5178125Abstract: A multifunctional water boiling and steaming device wherein the steam produced when boiling the water in a heating room is guided by a resisting tube into a steaming chamber to heat the food contained therein and wherein the boiled water flows through a cooling tube and is cooled therein into warm water, the cooling tube being disposed in the steaming chamber to conduct the heat to the steaming chamber to warm the same, whereby the heat of the steam and the boiled water can be recovered and utilized.Type: GrantFiled: January 30, 1992Date of Patent: January 12, 1993Assignee: Hui-Ling ChiuInventor: Lee M. Kuen
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Patent number: 5161517Abstract: A steam generator for a convection oven through the oven chamber of which heated air is circulated by means of a fan along a flow path in which the steam generator is positioned, comprises a heat-storage unit having a stack of elongated horizontal supports for supporting ball-shaped heat-storage bodies and means for spreading water over the heat-storage unit. Each support includes a bottom wall having a plurality of polygonal apertures which form seats for respective ones of the heat-storage bodies. The apertures, the size of which is substantially smaller than the largest cross-section of the heat-storage bodies, form flow passages through which water from overlying supports is passed to the top portion of the heat-storage bodies of underlying supports.Type: GrantFiled: May 17, 1991Date of Patent: November 10, 1992Assignee: Revent International ABInventor: Leif A. T. Johansson
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Patent number: 5161518Abstract: A float assembly for use in a steam cooking device and means for spraying a fluid toward the float assembly to keep mineral deposits and other scale from forming on the float assembly.Type: GrantFiled: July 31, 1991Date of Patent: November 10, 1992Assignee: Cleveland Range, IncorporatedInventor: James P. Bedford
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Patent number: 5158064Abstract: A steam cooking device comprising a steam generating chamber having a steam generator, a cooking chamber adjacent to the steam generating chamber for receiving steam from the steam generator, a conduit for transporting the steam from the steam generating chamber to the cooking chamber and a heating element for heating the steam to a superheated condition prior to the steam entering the cooking chamber.Type: GrantFiled: May 13, 1991Date of Patent: October 27, 1992Inventors: Thomas J. Willis, James P. Bedford
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Patent number: 5103800Abstract: A nozzle for use in a steam cooking device having a cooking chamber wherein the nozzle is positioned in a side wall of the cooking chamber, the nozzle comprising a body portion having therein an aperture and having first and second disks positioned on each side of the aperture and wherein steam enters the cooking chamber through the aperture.Type: GrantFiled: May 13, 1991Date of Patent: April 14, 1992Assignee: Cleveland Range, Inc.Inventors: James P. Bedford, John Jevnikar
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Patent number: 5080087Abstract: This invention is an indirect fired gas burning device having typically two gas burner assemblies, a radiant heat assembly and a convection heat assembly. The combustion products of both burner assemblies are kept separate from the convection air which is circulated through the oven. The device is adapted to be mounted within or attached to a gas stove, having an oven therein and which provides an improved gas stove which can perform the functions of: (1) bake (with controllable cooking air flow rates); (b) broil using a radiant heat assembly such as a screen broiler "looking" through or transparent to the radiant heat generated by the broiler such as an infrared window (also a new low profile screen burner assembly is disclosed); (c) steam which is possible because of the very low vent rate of the oven, i.e.Type: GrantFiled: December 6, 1989Date of Patent: January 14, 1992Assignee: Gas Research InstituteInventors: David H. McFadden, Karen R. Benedek, William E. Lyle
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Patent number: 5028399Abstract: A manifold (10) for use in a gas solder-reflow oven (50) comprises a hollow tube made from a transition metal having an open end (18) for receiving gas, a closed end (16), and a plurality of holes (12).Type: GrantFiled: January 12, 1990Date of Patent: July 2, 1991Assignee: Motorola, Inc.Inventors: Anthony B. Suppelsa, Robert W. Pennisi, Fadia Nounou, James L. Davis
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Patent number: 5016605Abstract: A furnace operating with steam and/or gas for cooking foodstuffs and comprising an enclosure containing on the one hand a gas burner connected to a system for supplying a mixture of gas and of combustion air under pressure which is mounted in the upper portion of the enclosure in an inverted downwards directed position and on the other hand a turbine for stirring the heated atmosphere within the enclosure.Type: GrantFiled: July 9, 1990Date of Patent: May 21, 1991Assignee: Gaz de FranceInventors: Jean LaForet, Andre Rigaud
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Patent number: 4984557Abstract: The invention refers to a baking oven having a baking chamber which is accessible via a door and which is designed for introducing therein a carriage carrying baking goods so that the carriage is stationary during a baking process. The baking oven comprises two air channels extending laterally of the baking chamber at both sides thereof over the effective height of the baking chamber and being each separated from the baking chamber by a partition provided with a plurality of air passage openings. The air channels are, during the baking process, alternately supplied by a blower and, via a switching equipment, with hot air heated by a heating means. The hot air is humidified by a vapor supply means and transversely passes the baking chamber in alternating directions and is subsequently again sucked back along a closed circuit to the suction side of the blower. The blower and heating means are arranged at a higher level than the baking chamber and at least partially above said baking chamber.Type: GrantFiled: October 18, 1988Date of Patent: January 15, 1991Inventor: Helmut Konig
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Patent number: 4939987Abstract: An electrical control system for regulating the humidity of an enclosed atmosphere in a dough proof box or the like, comprising a cast metal steamer tray, incorporating an electrical heating element operable to heat the tray between selected upper and lower temperature limits determined by a thermostat responsive to temperatures of the tray casting. A time controlled valve supplies water to the tray for selected time intervals when the thermostat senses the tray's upper temperature. A humidistat controls operation of the thermostat. As a result, the steamer tray is heated between high and low limits and supplied with measured amounts of water to effect rapid generation of limited quantities of steam to satisfy the humidity levels demanded by the humidistat.Type: GrantFiled: August 14, 1989Date of Patent: July 10, 1990Assignee: Anetsberger Brothers, Inc.Inventor: Mark J. Smith
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Patent number: 4917075Abstract: An arrangement for cooking by combustion of gas in which a thermal fluid flows between a boiler, in which it is heated, and heaters where it releases the heat received, the thermal fluid returning to the boiler. The heaters are provided with a cavity limited at the top by a plate generally flush with the hob of the arrangement. The thermal fluid is preferably vaporized in the boiler and is condensed in the heaters. The arrangement facilitates cleanliness of the hob and provides for correct exhaustion of the combustion gases.Type: GrantFiled: April 4, 1989Date of Patent: April 17, 1990Assignee: Catalana De Gas, S.A.Inventor: Jose M. Nacenta Atmella
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Patent number: 4906485Abstract: A process for reheating and/or complete cooking and baking of food-stuffs, especially of cooking, baking or grilling products, wherein a mixture of heated air and water vapor is introduced directly into the interior of the food-stuff before and/or during the heating procedure.Type: GrantFiled: July 30, 1987Date of Patent: March 6, 1990Assignee: Vaporina Back-Und Gefriergeraete GMBHInventor: Ernst Kirchhoff
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Patent number: 4892083Abstract: 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: GrantFiled: October 18, 1988Date of Patent: January 9, 1990Inventor: Helmut Konig
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Patent number: 4891498Abstract: A food treatment/holding apparatus has a cabinet defining a storage space for food to be treated, a heater with a surface that can be heated above the boiling temperature of water, and structure for delivering a plurality of preselected amounts of water against the heater surface according to the length of time a cabinet door is opened.Type: GrantFiled: March 21, 1989Date of Patent: January 2, 1990Assignee: Carter-Hoffman CorporationInventors: Robert C. Fortmann, Curtis C. Pinnow
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Patent number: 4884553Abstract: A device for heat-treating food items with vapor or a vapor-hot air mixture comprises a cooking chamber, in which food items are treated with vapor from a vapor generator. For cleaning the cooking chamber a squirting or spraying device insertable into the cooking chamber (5) is provided, which is built in the manner of a hand-held shower head and connected to a water connection. This spraying device can be connected to a water pipe present on the equipment, which is required for supplying water users like vapor generator, condensator or cooling device. The spraying device, however, can also be arranged on a water connection--arranged fixedly on the building--located in the vicinity of the device for heat treatment.Type: GrantFiled: November 23, 1987Date of Patent: December 5, 1989Assignee: Convotherm Elektrogerate GmbHInventor: Werner Schwarzbacker
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Patent number: 4839502Abstract: An oven that cooks foodstuffs containing water at temperatures up to 600 degrees Fahrenheit with longwave radiation generated by masking a cooking volume from radiant heating elements by blackened rigid inserts, which absorb shortwave and longwave radiation from the heating elements and uniformly reradiate the energy into the cooking volume as longwave radiation; non-condensing steam is injected into the oven until the vapor pressure of the water in the foodstuff attains a pressure at which water will migrate to the surface of the foodstuff to be evaporated; air is then passed through the oven to remove water from the foodstuff, while cooking with longwave radiation continues.Type: GrantFiled: March 21, 1988Date of Patent: June 13, 1989Inventors: David L. Swanson, Gilbert Trick
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Patent number: 4835368Abstract: A food treatment/holding apparatus has a cabinet defining a storage space for food to be treated, a heater with a surface that can be heated above the boiling temperature of water, and structure for delivering a metered amount of water at preselected intervals against the heater surface to produce water vapor in the food storage space.Type: GrantFiled: November 27, 1987Date of Patent: May 30, 1989Assignee: Carter-Hoffmann CorporationInventors: Robert C. Fortmann, Curtis C. Pinnow
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Patent number: 4823766Abstract: A gas steam oven is provided including the assembly of elements of direct heating and convection gas oven, and further includes a steam generator, an auxiliary heat source maintaining the burner at a temperature greater than the steam condensation temperature in the enclosure; a permanent flow of air in the air-gas mixture intake duct making it possible to re-ignite the burner after a period of combustion interruption.Type: GrantFiled: December 30, 1987Date of Patent: April 25, 1989Assignee: SC BourgeoisInventor: Raymond Violi
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Patent number: 4823767Abstract: The steamer comprises a first heating chamber (5) intended to generate wet steam from supplied water, and a second heating chamber (6) arranged between the first heating chamber (5) and the cooking chamber (2) and used for heating the wet steam coming from the first heating chamber (5). The temperature of the steam introduced in the cooking chamber (2) by means of the distribution means (4) is regulated by control device (9). In the steamer, the temperature of the steam supplied to the cooking chamber (2) may be continuously varied while reducing to a minimum the negative influence of limestone.Type: GrantFiled: November 4, 1986Date of Patent: April 25, 1989Inventor: E. Wust
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Patent number: 4817582Abstract: A gas-fired combination steam and dry oven has an oven cavity that is heated by heat exchange from one or more fire tubes and a boiler that is located outside the oven cavity and is heated by heat exchange from one or more other fire tubes. Both the oven and boiler fire tube heat exchangers employ natural draft gas burners. The combination oven can be operated as a forced-air convection oven, a forced-flow convection oven circulating superheated steam, or a steamer circulating saturated steam. Sensors in the oven supply information to a microprocessor that controls the gas burners to maintain an oven temperature within 5.degree. F. or less. Sensors of the level of water in the boiler assure that the water level stays within predetermined limits. Tray stops keep foods and the trays containing them away from the walls of the oven to permit free circulation of air, saturated steam, or superheated steam.Type: GrantFiled: September 17, 1987Date of Patent: April 4, 1989Assignee: Delaware Capital Formation, Inc.Inventors: G. Robert Oslin, Stewart C. Jepson