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| Number | Title | Issue Date |
| 6761559 | Gas-exhausting module structure suited for a continuous type oven A gas-exhausting module structure includes a casing having a first open end and a second open end. An air-exhausting channel is defined within the casing. The air-exhausting channel has an upper opening that is lower than the second open end of the casing. A blower ... | 07/13/2004 |
| 6546897 | Thermodynamically activated flue damper The invention is directed to a thermodynamically activated flue damper for a gas water heater that includes a flue damper for controlling the passage of exhaust gases through the flue; and a thermally sensitive member that is capable of contracting when t... | 04/15/2003 |
| 6182654 | Woodstove emission controller A woodstove emission controller for conveniently drawing emissions from the wood-stove so that the emissions do not enter the room where the wood-stove is located. The woodstove emission controller includes a tubular member having an inlet end, an outlet ... | 02/06/2001 |
| 6141495 | Portable flue heater to reduce or eliminate downdrafts A flue heater is detachably secured to the flue of a chimney. The flue heater uses an electrical power source to create heat and direct the heated air into the lower portion of a flue. The device can be attached to the flue before igniting a fire and remo... | 10/31/2000 |
| 6053162 | Balanced flue sealed vent terminal assembly The present invention is directed to a sealed vent terminal assembly intended for use in association with high-efficiency oil fired furnaces or boilers. The terminal assembly of the present invention is designed to simultaneously flow outside combustion a... | 04/25/2000 |
| 5394860 | Method of connecting a heat exchanger to a forced air furnace and related valve A method of connecting a heat exchanger to a forced air furnace is described. Firstly, connect a valve to the hot exhaust gas outlet of a furnace. The valve has a generally "L" shaped valve body. The valve body includes a primary passage. A diversion pass... | 03/07/1995 |
| 5357940 | Afterburner for grill A smokestack addition to a conventional outdoor type of domestic grill is shown that provides a suction at the outlet from the cooking zone of the grill to pull the products of combustion arising from the operation of the grill which suction of the gasses... | 10/25/1994 |
| 5226407 | Afterburner for grill A smokestack addition to a conventional outdoor type of domestic grill is shown that provides a suction at the outlet from the cooking zone of the grill to pull the products of combustion arising from the operation of the grill which suction of the gasses... | 07/13/1993 |
| 5016613 | Fireplace top wall assembly and cooling system A fireplace and top wall assembly is disclosed. The top wall assembly includes primary and secondary aligned flue outlet assemblies that form between them a primary air conduit and a secondary flue gas conduit. Both of the conduits are designed to be moun... | 05/21/1991 |
| 5012793 | Power vented direct vent system A power vented direct vent system for a fuel-burning appliance wherein a power venter is associated with a vent pipe to create adequate draft for combustion. Outside air is supplied to the appliance for combustion and also communicates through a regulator... | 05/07/1991 |
| 4951649 | Method and apparatus for heating and generating infrared rays The apparatus for heating and generating infrared rays has a heating apparatus for indirectly heating a heat medium such as air and water, by a combustion heat and a radiator, wherein a branch combustion gas passage is provided for a combustion gas passag... | 08/28/1990 |
| 4770108 | Two-way vent cap for controlled atmosphere furnace A vent cap for a heat treating furnace provides bidirectional pressure relief. The cap is weighted and balanced over the furnace vent such that the vent is closed as long as the furnace has a slightly positive internal pressure. If the internal pressure e... | 09/13/1988 |
| 4685441 | Heat exchanger A heat exchanger comprising a burner in a vertical heating chamber, having openings along its upper end to horizontally extending coils which pass through a plurality of heat transfer fins, the coils opening near the bottom edge of the assembly to a horiz... | 08/11/1987 |
| 4543941 | Valve for furnace stack pipe A valve is provided for installation in the auxillary duct of a furnace stack pipe. The valve prevents flow of air through the damper plate in the auxillary duct when the furnace is switched off. The valve is controlled by a temperature responsive bimetal... | 10/01/1985 |
| 4491124 | Self-tapping duct fitting A self-tapping duct fitting (10) in the form of a hollow sleeve having an interrupted cutting edge (20) at a one end (14) so that a hole (68) can be cut in a wall (66) of the duct by a rotative motion of the fitting. Preferably, the interrupted cutting ed... | 01/01/1985 |
| 4487137 | Auxiliary exhaust system An auxiliary exhaust system for use with a flue includes a conduit communicating at one end with an opening formed in the flue wall and a blower operable to introduce auxiliary air into the flue through the conduit. The conduit is angled so that the auxil... | 12/11/1984 |
| 4479483 | Safety stovepipe damper assembly A safety stovepipe damper assembly designed for use with a conventional type stovepipe and damper as used on coal, wood, or waste burning stoves. Provisions are made for presetting the damper to a specific low fire or closed position. A latch is also prov... | 10/30/1984 |
| 4470401 | Valve for furnace stack pipe A valve for provided for installation in the auxillary duct of a furnace stack pipe. The valve prevents flow of air through the damper plate in the auxillary duct when the furnace is switched off. The valve is controlled by a temperature responsive bimeta... | 09/11/1984 |
| 4437454 | Mechanical draft controller with vent damper A mechanical draft controller integrated in the draft hood of a furnace and coupled to a flue damper is responsive to the draft in the flue for controlling exhaust stack heat loss and eliminating heated room air loss via the draft hood under normal operat... | 03/20/1984 |
| 4406396 | Method and apparatus for regulating flue draft Method and apparatus for regulating the flue draft in heating systems including a combustion volume, a flue communicating with the combustion volume, and a vent opening between heated ambient air and the flue, the regulation being accomplished by sensing ... | 09/27/1983 |
| 4404956 | Furnace with draft-limiter and ventilation In an exhaust gas duct from a furnace a ventilation opening with a ventilation flap is openable in chronological conjunction with the cut-off of the furnace and it is closable in chronological conjunction with the switching on of the furnace. The ventilat... | 09/20/1983 |
| 4403599 | Spillage damper for a combustion system An apparatus is disclosed for use in venting the products of combustion from a power combustion system such as an induced draft furnace. The apparatus includes a housing having three openings and a baffle. One opening in the housing receives the gaseous p... | 09/13/1983 |
| 4335704 | Draft air secondary combustion apparatus for stoves A draft air combustion apparatus for directing substantially all of the draft air provided into a stove pipe for a stove upwardly into the stove pipe, and permitting a small amount of the draft air to flow downwardly into the stove to provide air to an ar... | 06/22/1982 |
| 4329967 | Adjustable flue control for furnaces A damper type control for furnace flues which opens with commencement of oil burner operation and closes when combustion ceases. The damper is operated solely by the presence of draft created by the oil burner blower, and closes in the absence of such dra... | 05/18/1982 |
| 4294223 | Bi-loop heat recovery system for an oil fired furnace A heating system for dwellings or other enclosures includes a furnace in which a burner is isolated from a hot air or water system, and receives substantially all of its combustion air from outside the enclosure and preheated. A heat exchanger is provided... | 10/13/1981 |
| 4270894 | Combination flue and vent damper A housing structure with a single pivoted damper member is provided as a replacement for the draft hood associated respectively with the flue outlet and vent pipe inlet in a gas heater system. The normal flue outlet for the gas system connects to a first ... | 06/02/1981 |
| 4174700 | Fireplace This is a new fireplace, which is either constructed in place or is totally prefabricated in advance and placed within a building where desired. The fireplace is particularly characterized by a pair of overlapping hollow members placed within the throat o... | 11/20/1979 |
| 4017026 | Automatic damper Automatic damper having pivotal semi-circular vanes which are moved to open position by pivotal movement of a longitudinal element disposed along the central gap between the vanes. The movement of the longitudinal element is controlled by a temperature re... | 04/12/1977 |
| 4006729 | Fireplace A wood burning fireplace in which exterior air is heated during flow through a chimney hood. Recirculated air from the room is drawn in and mixed with the heated fresh air in a zone formed between the chimney hood and a decorative hood casing. A linked da... | 02/08/1977 |
