Revertible Draft, Base-heating Patents (Class 126/75)
  • Patent number: 6085738
    Abstract: A burner has a burner tube and a nozzle holder mounted in one end of the burner tube. An igniter is positioned within the nozzle holder and acts to ignite any of the multi-liquid fuels which may be used with the burner. A nozzle emits atomized liquid fuel under the venturi effect of the nozzle with compressed air being supplied to the nozzle. Primary air holes extend circumferentially around the nozzle holder to admit air radially which passes directly to the burner tube. Secondary air holes extend around the inside circumference of the burner tube on the secondary air injection plate and admit air axially to the burner tube.
    Type: Grant
    Filed: February 21, 1995
    Date of Patent: July 11, 2000
    Assignee: International Thermal Investments Ltd.
    Inventors: Edgar C. Robinson, Leonard Fleming, Daniel M. Fraser
  • Patent number: 4850332
    Abstract: The invention relates to a masonry fireplace, particularly a baking oven, comprising: a furnace (4) in which the fuel is burnt and the bottom of which is formed by a baking grate (5), the furnace (4) being provided with an oven door (1) positioned in the front wall of the oven; an ash chest (7) positioned below the furnace (4) and provided with an ash door (2); a secondary fire chamber (10) positioned above the furnace (4) and into which a throat (9) leads from the back portion of the furnace (4); and substantially vertical cheek flues (15) extending downwards from the secondary fire chamber (10) on both sides of the oven door (1).
    Type: Grant
    Filed: October 27, 1987
    Date of Patent: July 25, 1989
    Inventor: Juha Sivonen
  • Patent number: 4831941
    Abstract: This invention relates to a method and apparatus for the extraction of heat and smoke from a fuel burn in a firebox. The design is for the firebox exhaust area to be wrapped with its own hot exhaust gases, for smoke extraction, and then, for heat extraction, have all of the outer surface of a stove, fireplace or furnace exposed to said hot exhaust gases. Such a wrap-aroung design burns smoke from said exhaust gases, holds a high temperature in the firebox area, for good combustion, and increases the efficiency of heat extraction by using all of the outer surface of the stove, fireplace or furnace as a high temperature heat exchanger.
    Type: Grant
    Filed: July 21, 1987
    Date of Patent: May 23, 1989
    Assignee: Temperature Adjusters, Inc.
    Inventor: Henry T. Childs
  • Patent number: 4714073
    Abstract: A discharge pipe is directly associated with one of the main heat exchange walls of a monoblock heating body, and a backflow damping device comprises two siphons placed symmetrically on either side of the pipe, each having a passage above the level of the horizontal axis of the pipe, which axis is situated in the median transverse plane of the heating body, and each of the siphons is situated substantially in line with an opening formed in the corresponding lateral side near the corresponding one of the two ends of the burner.
    Type: Grant
    Filed: July 30, 1986
    Date of Patent: December 22, 1987
    Assignee: S.A. Fonderies du Lion
    Inventor: Michel Herve
  • Patent number: 4499889
    Abstract: An improved heating apparatus, for example for use as a wood or coal burning parlor stove and providing a significant heat output, has a construction for reducing thermally induced mechanical stress and for enabling the interior baffle assembly components of the apparatus to be removed therefrom, for replacement if necessary, without dismantling the apparatus exterior frame. The elements of the interior baffle assembly are interconnecting and are secured in a mechanically stable configuration by single point connection to the apparatus frame. The apparatus can have primary and secondary combustion chambers and a baffle system for directing flue gases along a circuitous path from the secondary combustion chamber to an exit aperture whereby a significant proportion of the heat of said gases is given up to the apparatus. A vertically oriented downwardly directed two component baffle separates the combustion chambers.
    Type: Grant
    Filed: June 18, 1980
    Date of Patent: February 19, 1985
    Assignee: Vermont Castings, Inc.
    Inventor: Duncan C. Syme
  • Patent number: 4461272
    Abstract: A stove for heating a room has three coaxially nested tubular columns formed of superposed rings of ceramic material, these columns defining an innermost channel rising above a combustion chamber to carry off evolving flue gases, an intermediate channel in which the flue gases descend, and an outermost channel which is subdivided by a cylindrical metallic partition into an inner and an outer cylinder section, the former serving as a duct for the escape of the flue gases to an elevated exhaust while the latter is traversed by air to be heated through that partition. Passages connecting the combustion chamber with the inner channel section help entrain an initial gas flow, during start-up, through the descending path of the intermediate channel.
    Type: Grant
    Filed: May 25, 1982
    Date of Patent: July 24, 1984
    Inventors: Peter Larsson, Franz Schaffer
  • Patent number: 4387699
    Abstract: An efficient space heating stove having a combustion chamber substantially completely enclosed with insulating firebrick whereby the operating temperatures within the combustion chamber can be maintained above the ignition temperature of the fuel being consumed. Combustible gases liberated by the wood fuel are burned as they pass through a perforated, hollow, tubular member located within the combustion chamber and through which the combustible gases must pass before they are exhausted from the stove. Fuel within the combustion chamber is efficiently burned before useful heat energy is extracted.
    Type: Grant
    Filed: May 6, 1981
    Date of Patent: June 14, 1983
    Inventor: Charles J. Murch, Jr.
  • Patent number: 4320738
    Abstract: This stove invention relates to wood and coal burning stoves employed for heating. More effective draft control and heat transfer is achieved by a stove (11) employing straight and serpentine flues (46, 48), a control rod (43) to coordinate movement of a baffle (38) and damper (41) for defining passageways to the flues, and a channel (33) for apportioning air above and below the fuel and into first and second combustion chambers (26, 27).
    Type: Grant
    Filed: May 30, 1980
    Date of Patent: March 23, 1982
    Inventor: Virgil Johnson
  • Patent number: 4279238
    Abstract: A woodburning heating apparatus capable of horizontal and updraft combustion has removable elements positioned within a relatively small enclosed volume to provide efficient and reliable operation in either combustion mode. The removable elements include the wear plates, fireback, and damper assembly. The wear plates and fireback define primary, secondary, and night air supplies for the apparatus. An articulated damper control mechanism provides resistance against impinging combusted gases in at least one position of the damper. The damper construction allows, in either the horizontal or updraft combustion modes, the provision of both top exiting and rear exiting flue connections. Baffles are provided at the combusted gas exit from the primary combustion chamber to uniformly spread the combusted gases exiting the primary chamber over a substantial volume so that localized heating of the apparatus does not occur.
    Type: Grant
    Filed: October 19, 1979
    Date of Patent: July 21, 1981
    Assignee: Vermont Castings, Inc.
    Inventor: Duncan C. Syme
  • Patent number: 4201186
    Abstract: A stove or furnace in which the products of combustion are recirculated inside the combustion chamber by means of a V-shaped partition or baffle, the apex of which extends downward directly above the primary fire zone, so that the combustion products rising from the fire are deflected outward and then flow downward back into the primary fire zone. Secondary air may be mixed with the unburned combustion products above the primary fire zone to form a combustible mixture which is burned on re-entering the fire zone.
    Type: Grant
    Filed: March 17, 1978
    Date of Patent: May 6, 1980
    Inventor: Patrick J. Paquin
  • Patent number: 4192285
    Abstract: A fuel burning stove for holding and burning fuel to heat the surrounding atmosphere in a room where the stove is employed. The stove includes a fire box which supports the fuel and where the combustion is sustained. An air inlet is provided to the fire box allowing the inflow of air for combustion with the fuel. The air is preheated upon entry into the fire box for mixture with volatiles formed by the burning fuel directed toward the entering air by a baffle means to effect a secondary combustion. In addition, a movable damper cooperates with the baffle to direct volatiles toward the incoming heated air when the damper is in the closed position and to provide a more direct path to the chimney when in the open position.
    Type: Grant
    Filed: November 21, 1977
    Date of Patent: March 11, 1980
    Assignee: Valco Corporation
    Inventor: Val J. Nietupski
  • Patent number: 4180052
    Abstract: Fireplace furnace apparatus includes separate air systems for combustion and for heating and the combustion gases flow from a primary combustion chamber into a secondary combustion chamber and into additional settling chambers for particulate matter and the heated air flows through finned chambers adjacent the chambers through which the combustion air flows.
    Type: Grant
    Filed: October 19, 1978
    Date of Patent: December 25, 1979
    Inventor: Delbert H. Henderson