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| Number | Title | Issue Date |
| 7509954 | Residential fireplace insert This invention relates to a one-piece, self-contained air-heating, slide-in residential fireplace insert system comprising three sections: a control/base section, a front closure system and a tubing system; in particular to a system containing a plurality of individ... | 03/31/2009 |
| 7263987 | Grill cooker with air cooling unit and multipurpose cooking apparatus having the same A grill cooker that efficiently cools a grilling unit to prevent food from sticking to the grilling unit, and a multipurpose cooking apparatus in which the grill cooker is installed. The grill cooker includes a grilling unit on an upper portion of a cabinet, an air ... | 09/04/2007 |
| 7168427 | Air filtration and sterilization system for a fireplace An air filtration and sterilization system for removing airborne contaminants from air circulated through an air plenum system of a fireplace. Air filtration systems may include particulate, chemical, and ion filtration systems to filter the air. Air sterilization m... | 01/30/2007 |
| 6935333 | Wood burner with improved emissions A wood burner includes a wrapper. A firebox is positioned in the wrapper that defines a combustion chamber. An air inlet is placed in communication with an external air supply. The air inlet includes a conduit to conduct the external air to the combustion chamber an... | 08/30/2005 |
| 6932080 | Arrangement of burner and heat exchanger, and air-heating apparatus Arrangement of a burner (2) and a heat exchanger (1), the heat exchanger (1) including a plurality of heat exchange elements (3) interconnected to each other with intermediate gaps, the heat exchanger (1) being arranged with an inl... | 08/23/2005 |
| 6666206 | Fireplace insert An improved fireplace insert used in a fireplace to surround a heat source, including an arcuate conduit that is able to substantially surround the heat source on multiple sides. The conduit includes an inhaling end and an exhaling end, and divided into a... | 12/23/2003 |
| 6484714 | High temperature fireplace grate including room heating transfer tubes An improved grate for burning solid fuel having a support for the fuel, a blower for transporting air through the support, a multiplicity of orifices jets uniformly distributed across the entire area of the grate and directed through the support generally... | 11/26/2002 |
| 6047695 | Fireplace heat exchanger For use with a fireplace, a heat exchanger mounted across the top portion of the fireplace with the heat exchanger comprising a heat exchanger core with four identical extruded core sections connected together around an inner spin chamber for the passage ... | 04/11/2000 |
| 5904137 | Fireplace heat exchanger A fireplace heat exchanger that includes an air blower unit having an input for drawing air into the air blower unit and an output for expelling air from the air blower unit; a heat exchange unit, in airflow connection with the output of the air blower un... | 05/18/1999 |
| 5873356 | High efficiency wood pellet stove A wood pellet stove for efficiently burning wood pellets and especially burning pellets at low burns. The stove is accurately controlled by a control panel with a microprocessor which helps safely regulate air flow from a combustion air and exhaust gas fa... | 02/23/1999 |
| 5727540 | Fireplace heat exchanger A system for heating the air in the room containing a fireplace includes a heat exchanger mounted at the top portion of the combustion chamber of the fireplace to extend across the chimney flue opening and a fan for circulating room air through the heat e... | 03/17/1998 |
| 5572986 | Fireplace heat exchanger A system for heating the air in the room containing a fireplace includes a heat exchanger mounted at the top portion of the combustion chamber of the fireplace to extend across the chimney flue opening and a fan for circulating room air through the heat e... | 11/12/1996 |
| 5303693 | Summer damper for fireplace A fireplace comprises a firebox having a top panel, bottom panel, rear panel and a flue. An outer casing is spaced from and surrounds the firebox. A combustion air feed passage for supplying combustion air to the firebox is provided. A heat exchanger, whi... | 04/19/1994 |
| 5267552 | Direct vent gas fireplace A direct vent gas fireplace has a firebox surrounded by an enclosure. The enclosure has an inclined surface between the top, rear and sides. The surface is inclined at approximately 45 degrees and has an exhaust opening. The firebox has an inclined surfac... | 12/07/1993 |
| 5199416 | Hot air heat exchanger A hot air heat exchanger comprises a heat exchanger housing having a floor, which is essentially formed by a ceiling of an outer chamber and has at least one heat exchanger pipe extending from the floor to a ceiling element having exhaust openings, each p... | 04/06/1993 |
| 5139012 | Fireplace heat exchanger A fireplace heat exchanger having input means that is directly connected to a blower assembly, air to be heated is drawn in by the blower assembly and forced directly through the input means into a heat reservoir that is suspended directly above or within... | 08/18/1992 |
| 5046481 | Heating apparatus Heating apparatus for heating an environment comprises one or more heat exchange conduits (A, B, C, D, E, F, 6, 8) located in the flow path of primary heated fluid (F1-F2), and a device (4) for inducing a flow of air in each conduit, each conduit being ad... | 09/10/1991 |
| 4964396 | Fireplace restoration unit The unit restores existing, masonry fireplaces without entailing dismantling of the latter. A heating jacket base, heating jacket, smoke chamber and flue lining are set into the existing firebox, smoke chamber and flue. Ducting is provided to move heating... | 10/23/1990 |
| 4964397 | Fireplace construction In a fireplace unit having an open sided firebox formed by opposed side walls, a top wall, a bottom wall, a rear wall, and a connection in the top wall to an exhaust flue, the present improvement including an intermediate wall member of overall curved con... | 10/23/1990 |
| 4836182 | Gas burning heating device A forced air gas fired heating device may be utilized as a stove insert for a conventional open fireplace or in an alternative embodiment may be formed with a double walled construction for use as a free standing unit. In both embodiments a gas burner adj... | 06/06/1989 |
| 4773589 | Heat control systems Improvements in fireplace systems include several features some of which are separably usable in other heating apparatus. The features include a barometric damper adaptor, a grate structure, a manner of mounting hollow grate tubes in a fireplace assembly,... | 09/27/1988 |
| 4738241 | Woodburning stove with economizer The efficiency of a wood burning stove is enhanced in a number of different ways. The first is a means to first preheat air in the lower part of the airspace in the jacket before the air passes through heat exchange tubes in the firebox. The second is to ... | 04/19/1988 |
| 4694818 | Fireplace grate for gas fired fireplace including forced air heat exchanger An improved fireplace heat transfer unit includes a gas burner tube in a layer of sand retained in a trough beneath air conduction tubes arranged transversely to the burner tube. The air transfer tubes are all connected to a manifold at the rear of the fi... | 09/22/1987 |
| 4607612 | Fireplace furnace A furnace insert (10) for an enclosed fireplace is disclosed. Furnace (10) includes an outer housing (11) and an inner housing (50) which define a firebox (11A). A plurality of tubular steel ducts (45-52), inclusive, are mounted within firebox (11A) and h... | 08/26/1986 |
| 4535751 | Heat recuperator for fireplace Forced air space heating fireplace having a metal casing defining a combustion chamber with an opening facing a room to be heated. Air flow tubes are provided beneath the floor of the combustion chamber and at the top, the air flow tubes being interconnec... | 08/20/1985 |
| 4535752 | Fireplace cross-circulating air heater A fireplace heater has a pair of pluralities of heat exchanger tubes passing air in opposite directions across a fireplace. A first plurality of the heat exchanger tubes passes air from a left blower and duct means to a right duct means which discharges t... | 08/20/1985 |
| 4470400 | Fireplace insert The disclosure teaches a fireplace insert. The insert has a front surface having an openable see-through portion and fixed see-through portions on either side of the openable see-through portion. Warming air inlets are disposed below the fixed see-through... | 09/11/1984 |
| 4469276 | Heat recovery apparatus The present invention discloses a heat recovery apparatus, for example for use in a fireplace having a firebox with an upwardly directed flue of selected peripheral configuration communicating with the firebox and having an atmospheric outlet. The apparat... | 09/04/1984 |
| 4455995 | Heating stove with heat regulating system A circulating air wood burning heating stove/fireplace combination has a combustion chamber that is in the form of a shell defined by inner walls of the stove and a rearwardly disposed air outlet manifold. Spaced outer auxiliary back and top walls and the... | 06/26/1984 |
| 4455994 | Woodburning heating stove and heat extractor A circulating air wood burning heating stove/fireplace combination has a combustion chamber that is in the form of a shell defined by inner walls of the stove and a rearwardly disposed air outlet manifold. Spaced outer auxiliary back and top walls and the... | 06/26/1984 |
| 4445497 | Fireplace heating unit A fireplace heating unit apparatus for insertion into a fireplace and hearth arrangement having two parallel heat exchange units forming a fireplace grate with each unit including a series of hollow tubing heat exchange members having a plurality of zigza... | 05/01/1984 |
| 4441481 | Heat-recovery device for open hearth There is described a device formed by a number of hollow elements mounted next to one another and fastened to one another, which have such a profile that they form at the bottom in the horizontal portion thereof, a grate the fuel bears on, merge backwards... | 04/10/1984 |
| 4438756 | Apparatus and method for accomplishing efficient burning of biomass fuel materials An apparatus and method accomplishes the burning of biomass fuel materials with up to 80 percent efficiency. The inventive method and apparatus utilize a catalytic converter in communication with a combustion chamber to combust more completely combustion ... | 03/27/1984 |
| 4408594 | Fireplace heated grate A hollow heated grate for a fireplace is provided with an electric motor and a blower inside of the heated fireplace enclosure for circulating cool air from the area to be heated through the hollow grate and returning the heated air to the area to be heat... | 10/11/1983 |
| 4381759 | Fireplace heat exchanger apparatus and method A fireplace heat exchanger apparatus and method utilizes a tubular grate for holding fuel to be burned having a bottom portion for collecting a liquid such that the liquid will be vaporized by the heat from the fuel burned in the grate and carried into a ... | 05/03/1983 |
| 4372286 | Wood burning stove An improved wood burning stove for providing heated air to a room or similar area includes an enclosed fire chamber, a hearth at the bottom of the fire chamber, draft inlet means at the front of the fire chamber and a flue at the rear of the fire chamber.... | 02/08/1983 |
| 4369626 | Hot-air distribution system A self-contained, self-powered hot air distribution system is provided which utilizes a Stirling engine, the hot end of the displacement cylinder of which extends into a fireplace or other heat source, with a fan or blower which is powered by the Stirling... | 01/25/1983 |
| 4361131 | Circulating-air heating stove with exit air heat extractor A circulating air wood burning heating stove/fireplace combination has a combustion chamber for burning fuel. The combustion chamber is in the form of a shell defined by inner walls of the stove and a rearwardly disposed air outlet manifold. Spaced outer ... | 11/30/1982 |
| 4353350 | Fireplace heat exchanger A fireplace heat exchanger is disclosed comprising a spacer frame assembly adapted to provide a frame for surrounding the open front of a fireplace opening, and a heat exchanger assembly in communication with said frame assembly. The heat exchanger assemb... | 10/12/1982 |
| 4335703 | Heat conservation and storage apparatus and system Excess heat from a source such as a fireplace is absorbed into a liquid medium and transferred to storage for later use or to a distribution network for radiation at remote locations. The fireplace can be formed by heat conducting walls of a multi-chamber... | 06/22/1982 |
