Feeding Air Patents (Class 126/15R)
  • Patent number: 5842463
    Abstract: Portable camp stove, wherein solid-fuel, especially of dried tree and bush twigs, is burned upon a supporting fuel grate positioned at bottom of a combustion-chamber. Solid-fuel is added directly into the combustion-chamber during operation through alligned stoke holes in a chimney and a vented-fire-ring, and then dropped vertically downward through an exhaust vent. Air for primary combustion is drawn into the combustion-chamber through a ring of intake apertures adjacent to and above the stove's bottom plate. Stove's outer wall is spaced apart from the wall of the combustion-chamber and the two walls are joined together and sealed by a top plate, creating an adjacent confining airspace. Air enters into said airspace through a ring of secondary air intake apertures in stove's outer-wall, where it is heated by thermal communication, as heat emitted from combusting solid-fuel passes through the combustion-chamber wall.
    Type: Grant
    Filed: June 14, 1996
    Date of Patent: December 1, 1998
    Inventor: John Battaile Hall
  • Patent number: 5485816
    Abstract: An oven utilizing charcoal as the source of cooking heat is disclosed, the oven having a thermostatically controlled charcoal ignition means used only to ignite and then reignite the charcoal in response to any temperature drop below a predetermined lower limit.
    Type: Grant
    Filed: September 27, 1994
    Date of Patent: January 23, 1996
    Inventors: Verlon F. Cox, Don Chaney
  • Patent number: 5413089
    Abstract: A solid fuel burning stove includes a firebox having front side and rear walls, a top and a bottom, and a secondary combustion unit formed from high temperature insulative refractive material mounted on the top and rear wall of the firebox. The unit is connected to the firebox by a mouth located in the rear wall adjacent the floor of the firebox and by a perforated plate on the firebox top wall. A vertical combustion passage extends from the mouth up to a mixing and combustion chamber located in the unit above the top wall of the firebox. The secondary combustion unit efficiently burns secondary combustion gases flowing into the unit through the mouth and plate during different stages of burning solid fuel, particularly wood.
    Type: Grant
    Filed: March 4, 1993
    Date of Patent: May 9, 1995
    Assignee: Harman Stove and Welding, Inc.
    Inventors: Derik K. Andors, Robert W. Ferguson, Dane P. Harman
  • Patent number: 5203316
    Abstract: A portable camp stove is disclosed. It consists of a frusto-conical main body, a preheating chamber, and spiral flue chambers. The stove may be placed over a fire in a pit in the earth, or the stove may completely contain a fire within it when its bottom plate and legs are attached. Other accessories of the stove include a stovepipe and oven combination, a water heating system, and a grill and a rotisserie.
    Type: Grant
    Filed: November 18, 1991
    Date of Patent: April 20, 1993
    Inventor: Wayne Pritchett
  • Patent number: 5137009
    Abstract: The invention relates to a combustion device for wood or coal comprising a front wall with a fuel charging opening, two side walls, a rear wall, a bottom wall, a top wall, a door for the fuel charging opening, a control element for controlling a fresh-air inlet opening, an inner dividing wall which divides the interior of the device into a pre-combustion chamber and a post-combustion chamber, and a passage opening between the two chambers and a grating at the bottom of the pre-combustion chamber and a flue gas discharge opening; the dividing wall is horizontally disposed and a shaft pipe surrounded by an annular chamber which is in communication with the fresh-air inlet opening is inserted sealingly into its passage opening; the grating is placed on its upper end.
    Type: Grant
    Filed: October 30, 1991
    Date of Patent: August 11, 1992
    Inventor: Heribert Posch
  • Patent number: 4920949
    Abstract: A cooker that can be fueled by the oxidation of a number of sheets of newspaper wadded together. The cooker includes a rectangular bottom wall that is horizontal, impervious and supported by legs depending from its corners. The bottom wall together with upstanding side walls, front and rear walls integrally joined at its peripheral edges define an open topped housing. The upper edges of the front and rear walls support a removable grill basket of two hingedly connecting parts for holding food with a sheet of aluminum foil inserted in the basket therebelow, such sheet being of a size substantially to close the open upper end of the cooker. The side walls have heights exceeding the top of a supported basket to constitute wind shields. Hoods are affixed to the outside upper margins of the front and rear walls that have air communication with the interior of the housing through such margins to constitute a convective air inlet for supporting oxidation at the bottom of the housing.
    Type: Grant
    Filed: May 8, 1989
    Date of Patent: May 1, 1990
    Inventor: Norman J. McDonald
  • Patent number: 4825845
    Abstract: A combustion apparatus for burning wood or coal comprises a cooking enclosure mounted above a combustion chamber enclosure. An upper space of the combustion chamber enclosure contains a combustion chamber having a floor and walls made of refractory material. The combustion chamber is closed all around except for the top. A plurality of primary air holes are provided in the floor of the combustion chamber and a plurality of secondary air holes are provided through the combustion chamber enclosure at the level of the open top of the combustion chamber. An ash pan is mounted for sliding into the combustion chamber enclosure below the combustion chamber to act as a regulator for air entering the combustion chamber enclosure. A cooking plate is pivotally mounted in the cooking enclosure so that it can be lowered into a cooking position over the open top of the combustion chamber.
    Type: Grant
    Filed: June 15, 1987
    Date of Patent: May 2, 1989
    Inventor: Elia Olivotti
  • Patent number: 4730597
    Abstract: A biomass stove has an outer chamber formed by a continuous side wall which is connected to a bottom wall. An air inlet is formed in the bottom wall for allowing introduction of air into the interior of the outer chamber. A fuel basket, also formed as a continuous side wall attached to a bottom wall, is located within the outer chamber. In the fuel basket, near the bottom of the fuel basket, a grate is positioned. First and second reflecting members are positioned below the grate within the fuel basket. Air inlets are located along the bottom periphery of the fuel basket with primary air flowing up through the air inlets and over the reflecting members and through the grate into a fuel supply which can be located within the fuel basket on the grate. One or more of the primary stoves can be suspended in a support housing to form an appropriate multi-burner stove.
    Type: Grant
    Filed: July 25, 1986
    Date of Patent: March 15, 1988
    Inventors: Fred W. Hottenroth, Fred W. Hottenroth, III
  • Patent number: 4722322
    Abstract: A furnace or furnace-and-pot heating system comprises an inner shell, an outer shell surrounding the inner shell to form a duct between the two shells for preheating combustion air flowing down the duct to enter a combustion chamber within the inner shell. A container or pot for heating material such as water or foodstuffs may be supported inside the inner shell and above a combustion zone, such pot to be of diameter to form with the inner shell an annular flue for escape of combustion products. Draft control means are provided to regulate the amount of combustion air entering the combustion chamber.
    Type: Grant
    Filed: June 1, 1987
    Date of Patent: February 2, 1988
    Inventors: Frederick M. Varney, J. Arnold Varney
  • Patent number: 4635610
    Abstract: A hot air circulating oven in which separate shape memory alloy springs are employed as a drive means to open and close a damper for the oven.
    Type: Grant
    Filed: April 15, 1985
    Date of Patent: January 13, 1987
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Takao Nakanishi
  • Patent number: 4553524
    Abstract: A portable, compact, gas-fired cooking and barbecuing device for frying and boiling food in conventional cooking utensils, or barbecuing food when a barbecuing attachment is utilized. The device includes a bowl-shaped body having a bottom and a relatively deep, cylindrical side wall. A gas burner assembly is mounted in the bowl-shaped body so that the annular burner of the assembly is positioned toward the bottom of the body to protect it from wind effects. Three circumferentially spaced, radially extending support members connect the burner to the cylindrical side wall of the bowl and serve as supports for cooking utensils in which food is to be fried or boiled. Mounting portions on the other ends of the support members extend above the upper edge of the body for supporting large sized cooking utensils. When the lower cylindrical portion of an annular barbecuing attachment is engaged with the support members of the burner assembly, food items may be barbecued on the barbecuing grill of the attachment.
    Type: Grant
    Filed: September 6, 1983
    Date of Patent: November 19, 1985
    Inventors: Don R. Wheat, Don H. Coers
  • Patent number: 4471751
    Abstract: A small compact stove capable of burning a variety of carbonaceous fuels has a base and located on the base is a vertically oriented cylindrical wall. The wall is formed of a heat conducting material and has open bottom and top ends. The interior surface of a portion of the wall forms a combustion chamber. A grate is located within the wall at the bottom end of the combustion chamber. The primary air chamber is located at the open bottom end of the wall and primary air is conducted through it and then up through the grate into the combustion chamber. A secondary air chamber surrounds at least a portion of the wall such that the wall forms one of the surfaces of the secondary air chamber. The wall includes a plurality of air passageways between the secondary air chamber and the combustion chamber such that air can flow within the secondary air chamber in contact with the exterior surface of the wall and be heated by heat conducted through the wall from the combustion chamber.
    Type: Grant
    Filed: October 21, 1981
    Date of Patent: September 18, 1984
    Inventors: Fred W. Hottenroth, Fred W. Hottenroth, III
  • Patent number: 4457294
    Abstract: A control regulates the rate of flow of combustion air flowing into an airtight stove or furnace10 containing a fire. A control element 15 or 45 is arranged in communication with the air inflow stream and moves in response to the velocity of the flowing air. The control element 15 or 45 moves to constrict the area of the inflow stream as air velocity increases and to open the area of the inflow stream as air velocity diminishes. Springs 25 and 26 or 60-62 bias the control element toward a maximum opening, and the spring bias is non-linear to provide increasing resistance to movement as the control element approaches a closed position. The spring bias system is preferably adjustable to vary the air inflow rate that is otherwise kept steady by the control element.
    Type: Grant
    Filed: May 13, 1982
    Date of Patent: July 3, 1984
    Inventor: Edward H. Cumpston
  • Patent number: 4430985
    Abstract: A charcoal cooker comprising a vessel having a lid providing for access to the interior of the vessel, a removable rack for supporting food during a cooking operation, a fire box adjustably disposed within the vessel and spaced below the rack for supplying heat during the cooking operation, and thermostatically actuated valves provided for the vessel and responsive to the internal temperatures in the cooker for alternately opening and closing to automatically maintain a preselected temperature within the vessel during an entire cooking operation.
    Type: Grant
    Filed: January 28, 1982
    Date of Patent: February 14, 1984
    Inventor: Robert C. Huneycutt
  • Patent number: 4367725
    Abstract: A heating apparatus capable of efficiently burning both coal and wood has removable restriction elements for varying the rate of flow of air from an inlet port in the heating apparatus to a fuel holding combustion chamber. The restriction elements are positioned in the air supply path or paths from the inlet port to the fuel holding combustion chamber.
    Type: Grant
    Filed: February 28, 1980
    Date of Patent: January 11, 1983
    Assignee: Vermont Castings, Inc.
    Inventor: Duncan C. Syme
  • Patent number: 4350141
    Abstract: A device for preventing blow back through the fuel loading door in stoves or heaters in which the rate of combustion is controlled by restricting the supply of air to the combustion chamber. When the stove is burning during normal operation the fuel loading door is closed and an air inlet to the combustion chamber is blocked by a pan member of the outer cabinet door. A thermostatic damper controls the rate of combustion in the combustion chamber by restricting the quantity of air supplied via other air intakes. When the outer cabinet door is opened to gain access to the fuel loading door, the pan member on the cabinet door is moved away from the air inlet to the combustion chamber thereby allowing additional air to enter the combustion chamber via the air inlet to the combustion chamber. The additional air supplied via this air inlet increases the rate of combustion prior to the opening of the fuel loading door.
    Type: Grant
    Filed: April 30, 1979
    Date of Patent: September 21, 1982
    Assignee: Jackes-Evans Manufacturing Company
    Inventor: Joseph N. Miller
  • Patent number: 4343289
    Abstract: An air tight wood burning stove (10) for heating a designated space comprises a housing (12) having an access opening (50) in the front wall (14) thereof and at least one glass panel (64) containing door (54, 56) hingedly mounted on the front wall for closing the opening (50). A latching mechanism (60) on the door (54, 56) engages with undercut flange means (52, 53) surrounding opening (50) for positively maintaining the door (54, 56) in the closed position. A firebrick lined combustion chamber (34) within the housing receives logs through opening (50) for burning and the production of hot combustion gases. An air chamber (48) is formed within the housing (12) in air flow communication with the combustion chamber (34) for feeding air thereto through openings (94, 96) in the air chamber walls (46, 90).
    Type: Grant
    Filed: March 21, 1980
    Date of Patent: August 10, 1982
    Inventor: Valentine J. Zimmerman
  • Patent number: 4335702
    Abstract: An efficient, clean burning, woodburning stove in which super heated fresh air and exhaust gases from the primary combustion of the wood fire are introduced into a secondary combustion chamber wherein these gases are mixed to recombust remaining fuel particles. Exhaust from the secondary combustion chamber enters a heat exchange chamber wherein the heat content of the exhaust gas is transferred to the cooking surface of the stove. The burning rate of both the primary and secondary combustion can be independently controlled by individually selecting the air supplies to the combustion areas. An inclined grate, in combination with the direction of the exhaust gases, provides a self feeding feature in which an even burning rate of the fire is insured.
    Type: Grant
    Filed: August 22, 1979
    Date of Patent: June 22, 1982
    Inventor: Joseph E. Jarboe
  • Patent number: 4316444
    Abstract: A stove construction including a firebox that defines a combustion chamber. Air is supplied to the upper portion of the combustion chamber through a preheat manifold having outlet apertures spaced along the sides. Air is drawn from the atmosphere into the manifold where it is preheated and discharged in the form of jets toward the sloping side walls of the firebox and into the flow path of the waste gases of combustion. Due to the restriction to flow caused by baffles located in the spaces between the sides of the manifold and the sloping sidewalls, a portion of the mixture of air and waste gases is directed downwardly along the surface of combustion plates, which are spaced from the walls of the firebox, back toward the primary combustion area. The waste gases are further combusted as they pass downwardly along the heated combustion plates. The recirculation achieves complete combustion of the waste gases.
    Type: Grant
    Filed: November 28, 1979
    Date of Patent: February 23, 1982
    Inventor: Russell C. Gullickson
  • Patent number: 4265214
    Abstract: A heating apparatus is disclosed wherein a combustion chamber which contains the fuel to be burned is located adjacent to an air heating chamber. Conduit means communicate from the air heating chamber to the combustion chamber for the purpose of leading air, which has been heated within the air heating chamber, into the combustion chamber. Blower means draw ambient air from the space surrounding the heater into the air heating chamber where it is blown through the conduit means into the combustion chamber to promote efficient combustion of the fuel.
    Type: Grant
    Filed: April 5, 1978
    Date of Patent: May 5, 1981
    Inventor: Henry Rasmussen
  • Patent number: 4265215
    Abstract: A passive type of space heater having a vertical air heating duct located at the rear of the combustion chamber and a flue duct extending through the air heating duct with its inlet located so as to draw the flue gases from the combustion chamber around the surfaces of the air heating duct. Air for combustion is supplied to the top of the combustion chamber by an air supply duct which extends inside of the flue duct and has orifices to provide air in the flue duct for secondary combustion of the flue gases passing through the flue duct. The air supply duct also has an ejector to draw a portion of the flue gases into the air supply duct for recirculation to the combustion chamber for tertiary combustion. A separate air supply duct is provided for supplying air for combustion during start-up.
    Type: Grant
    Filed: June 12, 1979
    Date of Patent: May 5, 1981
    Inventor: Earle Curry
  • Patent number: 4201185
    Abstract: The wood burning heating means of the present invention utilizes a firebox having a grate adjacent the lower end and a flue opening adjacent the upper end thereof. A baffle is positioned immediately below the flue opening in such a manner as to deflect rising hot gases prior to their exit through the flue opening. A main draft opening provides communication of air below the grate to provide oxygen for the fire. A secondary draft opening is provided above the grate for introducing air in such a manner that oxygen will be provided immediately below the baffle to facilitate combustion of the gases which have accumulated adjacent the baffle.
    Type: Grant
    Filed: August 21, 1978
    Date of Patent: May 6, 1980
    Inventor: Milton W. Black
  • Patent number: 4117824
    Abstract: An automatic wood burning heating stove has a fire chamber, a fuel feeding opening, closeable by an airtight door which is removable to convert the heater to an open fireplace. The door has a reflective ceramic surface on its inner face to direct heat toward preheating tubes having outlets directed above the fire zone. The door also reflects heat toward a downdraft preheating passage at the back of the stove. The draft preheating passage has a thermostatically controlled door which is closed when the stove is converted to a fireplace.
    Type: Grant
    Filed: November 17, 1976
    Date of Patent: October 3, 1978
    Inventors: Kendrick H. McIntire, John E. McIntire
  • Patent number: 4076009
    Abstract: A generally cylindrical casing is hollow, and is supported by a base so that the axis of the casing is horizontal. A vertical partition divides the casing into a fire chamber and a smaller exhaust chamber. The smaller chamber is vented to the outside atmosphere by a chimney. The partition does not completely isolate the chambers, but enables them to be interconnected through a small gap at its bottom. Extending rearwardly along the curved portion of the casing are two oppositely disposed parallel horizontal elongated air intake slits at the level of the bottom of the partition. The major portion of the section of the casing that surround the fire chamber is of glass. The base can have a horizontal hollow half cylindrical shell at its top which supports the casing and a vertical hollow intake duct extending from a bottom opening in the base to the slits to feed air thereto.
    Type: Grant
    Filed: June 21, 1976
    Date of Patent: February 28, 1978
    Assignee: The Raymond Lee Organization, Inc.
    Inventor: Harold W. Hannebaum