Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 7380548 | Stove apparatus A stove comprising a frame bounding an area to receive a burner, a heating cavity assembly mounted on the frame and having four side walls and a bottom wall having an opening therein, and a collar mounted in the heating cavity assembly around the opening. Front, rea... | 06/03/2008 |
| 7216645 | Wood burning stove having pivoting baffle and method A wood burning stove is provided. The combustion chamber in which the fire occurs has a baffle plate that is moveable to direct air flow through one of two different pathways from the combustion chamber to the chimney. When in a first position, the baffle plate forc... | 05/15/2007 |
| 7013886 | Plastic shell heater A plastic shell heater utilizing multiple deflectors and vents at the top of interior of a portable heater to direct the heat away from the surface of the heater. This dramatically lowers the temperature of the external surfaces of the heater and allows the use of p... | 03/21/2006 |
| 6769424 | Heater with heat resistant anti-oxidant coating on interior surfaces A heater for burning fuel having a hollow enclosure with an air inlet, and a combustion gas outlet. The enclosure has an exterior heat exchange wall preferably directly exposed to ambient air and an interior surface defining a combustion chamber. The enclosure has a... | 08/03/2004 |
| 6688302 | Wood burning stove having pivoting baffle and method A wood burning stove is provided. The combustion chamber in which the fire occurs has a baffle plate that is moveable to direct air flow through one of two different pathways from the combustion chamber to the chimney. When in a first position, the baffle... | 02/10/2004 |
| 6546926 | Brickless stove A wood burning stove in the shape of a barrel having both primary and secondary air inlets for supplying clean combustion. Primary air is fed into the stove from above the door. Secondary air is fed into a heating duct which extends along the bottom of th... | 04/15/2003 |
| 6116232 | Gas fireplace insert A gas fireplace insert structure having a firebox formed to direct flue gases reaching the upper section thereof through a folded path to flow forward and upwardly and then return rearwardly to an exhaust opening, and a casing formed to provide a room air... | 09/12/2000 |
| 5499622 | Afterburner system and process Process and system for the operation of a fireplace or the like in which combustion products including pollutant gases and entrained particulate materials are treated to substantially reduce pollutant levels. The combustion products are passed through a c... | 03/19/1996 |
| 5497761 | Heating device for solid fuels The invention describes a heating device (1) for solid fuels (2) with a heating element (3) which comprises a combustion chamber (6) and adjacent thereto a flue gas conduit. Downstream of the combustion chamber (6) a suction device (30) for the flue gases... | 03/12/1996 |
| 5392760 | Direct vent fireplace A gas fireplace comprising a housing adapted to be located in a building. There is a first conduit in the housing to act as an air inlet. In insert is received within the housing. A second conduit in the insert aligns with and is received by the first con... | 02/28/1995 |
| 5388566 | Gas fires A simulated solid fuel effect gas fire comprising two elongate simulated solid fuel elements in the form of logs, with a partially aerated gas burner arranged in front of and below each log with respect to the front of the fire. Thus, in use, the flames f... | 02/14/1995 |
| 5341794 | Combustion device for stoves and fireplaces A combustion device is described by several embodiments to enable efficient, clean burning of fuel in combustors. In stove and fireplace embodiments, primary, secondary and tertiary air supplies are provided within a firebox at selected locations relative... | 08/30/1994 |
| 5280142 | Heat shielded exhaust system component An exhaust muffler and heat shield assembly and a method for producing the assembly are provided The muffler includes a pair of stamp formed external shells. At least one external shell is stamped to include a plurality of tabs extending outwardly from th... | 01/18/1994 |
| 5226811 | Oil burner An oil burner capable of being prevented from being locally heated by combustion in a combustion cylinder structure. A guide plate is arranged at an upper region in a housing of the oil burner for guiding combustion gas emitted from the combustion cylinde... | 07/13/1993 |
| 5113843 | Combustion device for stoves and fireplaces A combustion device is described by several embodiments to enable efficient, clean burning of fuel in combustors. In stove and fireplace embodiments, primary, secondary and tertiary air supplies are provided within a firebox at selected locations relative... | 05/19/1992 |
| 5092313 | Gas log fireplace with high heat output A gas log fireplace includes a firebox which defines a combustion chamber, a gas burner located within the firebox, an artificial log set, a log support member positioned on the gas burner, a heat exchanger connected to an exhaust gas outlet of the firebo... | 03/03/1992 |
| 5029534 | Wrap-around heat and smoke extractor 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 extracti... | 07/09/1991 |
| 5014684 | Wall shield and chimney support An improved wall shield and chimney support (WSCS) unit adapted to fit flush within the wall of a dwelling is disclosed. The WSCS unit includes ducts for ducting cooling air entirely around the inner wall of the unit and especially around the front latera... | 05/14/1991 |
| 4957098 | Wall shield and chimney support An improved fireplace unit adapted to fit flush within the wall of a dwelling is disclosed. The fireplace unit comprises duct means for ducting cooling air entirely around the inner wall of the unit and especially around the front lateral edges and top, w... | 09/18/1990 |
| 4922889 | Pelletized fuel burning heater A heater for burning combustible pelletized fuel. The pelletized fuel is delivered at a controllable rate to a double-walled burn pot in an enclosed combustion chamber. Combustion air is injected into the combustion chamber at a pressure higher than the a... | 05/08/1990 |
| 4896654 | Pollution neutralizing woodburning stove This invention concerns a solid fuel stove, in particular a wood stove fitted with a device capable of neutralizing the polluting elements of burnt gasses and that comprises, in a conventional manner, a chamber of combustion formed by vertical walls and t... | 01/30/1990 |
| 4886047 | Fireplace heat efficiency device A simple, low-cost, low-maintenance device to be added or built in to a fireplace, which, by convective and radiative means, increases the amount of heat transferred to living areas, is architecturally unobstrusive in design and silent in function.... | 12/12/1989 |
| 4862869 | Low emissions wood burning stove A wood burning stove incorporates a catalytic cell for reducing exhaust emissions from the stove. A pair of heat shields are spaced from opposing surfaces of a combustor to exchange thermal radiation with the combustor. The combustor is oriented at an acu... | 09/05/1989 |
| 4856491 | High efficiency solid fuel burning stove A solid fuel heating apparatus including a secondary combustion chamber in gaseous communication with a primary combustion chamber for increasing heating efficiency and for reducing polluting emissions. The secondary combustion chamber is lined with a ref... | 08/15/1989 |
| 4854298 | Secondary combustion device for woodburning stove An improvement in a woodburning stove of the type including an exhaust flue opening; a combustion chamber for primary combustion, having an access door, a support for wood to be burned and a primary air inlet means for supplying primary air to support pri... | 08/08/1989 |
| 4831941 | Wrap-around heat and smoke extractor 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 extracti... | 05/23/1989 |
| 4793322 | Direct-vented gas fireplace A zero clearance fireplace of the type to be installed inside of a building against or near an outside wall is provided. The box shaped fireplace is provided with four substantially vertical walls, a top wall and a bottom wall. The bottom wall comprises a... | 12/27/1988 |
| 4766876 | Wood stove A wood stove is described having a firebox with a baffle mounted therein that extends forward from a rear wall terminating in a forward edge spaced from a front wall. The wood stove has a front opening with a door thereon that includes a window enabling v... | 08/30/1988 |
| 4724798 | Outdoor woodburning furnace An outdoor wood-fired furnace which heats water for domestic use and provides heat is disclosed. The furnace has a water jacket, sides, top and ends. A main distribution chamber is provided for air on its bottom with outlet means to the firebox. The water... | 02/16/1988 |
| 4714073 | Heating apparatus operating with gaseous fuel and designed to be connected to a smoke pipe 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... | 12/22/1987 |
| 4708123 | Wood burning stove The present invention provides a wood burning stove having an internal damper plate located between first and second combustion chambers within the stove. The damper plate is movable between a chamber dividing and a chamber joining position where the damp... | 11/24/1987 |
| 4690126 | Catalytic combustion assembly for wood-burning stove A catalytic combustor assembly includes a housing containing a catalytic combustor for insertion into the firebox of an existing stove. The housing engages and hermetically seals against the ceiling of the firebox surrounding the flue outlet of the stove ... | 09/01/1987 |
| 4683868 | Wood burning stove having glass cleaning system A wood stove with glass panels for viewing of the fire therein includes a glass cleaning system with a number of features which in combination effectively prevent soot and creosote buildup. A uniform curtain of hot air is directed downwardly over the glas... | 08/04/1987 |
| 4681087 | Woodkiln combustion device A wood burning device comprising a metal box with a flue, an automatic flue damper, a combustion chamber formed by layers of insulating refractory material, a transparent ceramic glass front, an insulated refractory baffle forming the top portion of the c... | 07/21/1987 |
| 4677965 | Wood or coal burning heater A high-efficiency clean burning heater for the burning of wood or coal is disclosed. The heater has a primary combustion chamber for the burning of solid fuel positioned above a secondary combustion chamber for the burning of combustible gases and polluta... | 07/07/1987 |
| 4672946 | Secondary combustion device for woodburning stove An improvement in a woodburning stove of the type including an exhaust flue opening; a combustion chamber for primary combustion, having an access door, a support for wood to be burned and a primary air inlet means for supplying primary air to support pri... | 06/16/1987 |
| 4665889 | Stove Wood burning stove having several features for reducing emissions output and for improving energy efficiency by increasing the supply of oxygen to combustible materials, by increasing the mixing of oxygen with combustible materials, and by lengthening the... | 05/19/1987 |
| 4658801 | Stove with multiple chambers A stove comprises walls defining a main air inlet, a flue outlet and four chambers through which gas passes sequentially from the main air inlet to the flue outlet during normal operation of the stove. The chambers comprise a pre-heat plenum chamber into ... | 04/21/1987 |
| 4653465 | Heater A heater for combustion of carbonaceous fuels comprising a casing which surrounds and contains the fuel immediately prior to and during combustion and a heat exchanger of unique design which is positioned within the casing. The efficiency of the heater ma... | 03/31/1987 |
| 4651709 | Fuel burning stove A stove to burn solid fuels, said stove comprising a combustion chamber with a front (13) with a fuel charging aperture (14) therein and a door (3) with a transparent viewing panel (33) therein mounted over the aperture (14), a baffle (15) dividing the in... | 03/24/1987 |
