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| Number | Title | Issue Date |
| 7337828 | Heat transfer using a heat driven loop A heat transfer fluid medium (25) within the closed system is arranged to boil to form a vapor in the evaporation section (12) and such that release of heat from the condensation section (11) to the fluid to be heated (4A) causes the vapo... | 03/04/2008 |
| 7097210 | Method and apparatus for providing a transition connector to introduce outside air and vent flue for boiler combustion A method and apparatus for sealing a combustion intake for a boiler from inside air is provided. A method and apparatus for providing a transition piece for venting fresh air to and combusted gas away from a boiler is also provided. A method of connecting a transiti... | 08/29/2006 |
| 7055466 | Control system for a portable instant hot water heater A portable instant water heater. Water is delivered to a base unit of the instant hot water heater by a pump that draws water from a reservoir through a flow control valve. The water flows into a pre-heater that wraps around a base of the burner and that is heated b... | 06/06/2006 |
| 7038234 | Thermoelectric module with Si/SiGe and B4C/B9C super-lattice legs A super-lattice thermoelectric device. The device includes p-legs and n-legs, each leg having a large number of alternating layers of two materials with differing electron band gaps. The n-legs in the device are comprised of alternating layers of silicon and silicon... | 05/02/2006 |
| 7013841 | Differently configured fuel-fired water heaters constructed from identical production platforms A specially configured fuel-fired water heater production platform may be used as a natural draft water heater. Alternatively, by modifying an upper end portion of the production platform using associated conversion apparatus, the same platform may be converted to a... | 03/21/2006 |
| 6951191 | Water heater provided with compact design and hot water temperature for human body A water heater includes an exhaust hood, a heat exchange module, a main heat valve and a control valve extending downwardly in turn between a case and a plate. Inlet and outlet heads are installed on the two sides at the end of the hot water pipes respectively. Hole... | 10/04/2005 |
| 6640047 | Hybrid water heater with electrical heating unit and combustor In a hybrid water heater, a heat pump unit and a combustion heating unit are combined for heating water to be stored in a hot water tank. The combustion heating unit includes a combustor for heating water in a chamber by combustion operation. The chamber ... | 10/28/2003 |
| 6612301 | Water heater A water heater comprising a water-tight tank having a combustion chamber located in the bottom portion of the tank. A combustion air blower is operable to draw combustion air into the combustion chamber through a vertical tube in which the air flows from ... | 09/02/2003 |
| 6295980 | Composite polymer manifold for water heating unit A header for a heat exchanger having a plurality of parallel hollow tubes mounted between a pair of flat mounting plates and defining a plurality of passages through the plates. The header comprises a tubular elongated body portion having an outer surface... | 10/02/2001 |
| 6173118 | Sensor block and automatic fill valve for water with immersed copper fluid coil A pressureless electric water heater for domestic use has a cylindrical double-walled tank for holding a quantity of a heat transfer liquid such as water. Cold water enters a copper coil immersed in the heat transfer liquid. The heat transfer liquid is he... | 01/09/2001 |
| 6041742 | Fluid heating and pumping apparatus A fluid heating and pumping apparatus for use with hot fluid space heating systems includes a fluid tank containing heated fluid and a collapsible bladder contained within the fluid tank for absorbing expansion of the fluid within the fluid tank as it is ... | 03/28/2000 |
| 6026801 | Plug core heat exchanger An apparatus (10) for transferring heat to a fluid from combustion gases including a housing (12) extending between a first end (14) and a second end (16). The apparatus further includes a burner (24) in which a combustible gas and oxygen react to form ho... | 02/22/2000 |
| 6026804 | Heater for fluids A fluid heater includes a housing, a burner unit disposed in a bottom portion of the housing for burning combustible fuel, a combustion chamber disposed within the housing where the fuel is burned and a heat exchanger disposed substantially within the hou... | 02/22/2000 |
| 6019098 | Self powered furnace A self-powered combustion furnace unit. A combustion furnace providing circulating hot fluid heating is equipped with a thermoelectric generator comprised of a plurality of thermoelectric modules mounted on the furnace. The heat from the combustion provid... | 02/01/2000 |
| 5979371 | Foam distribution jacket and method of insulating a hot water heater with expandable foam material A foam distribution jacket (10) for containing an insulating expandable liquid foam mixture (44) prior to expansion into a space (17) between a hot water tank (22) and an outer casing (29) secured thereabout. The jacket (10) comprises a pair of sheets (11... | 11/09/1999 |
| 5967138 | Flash suppressor for hot water heater A protective collar means for surrounding the lower periphery of a cylindrical water heater. The collar means comprises a cylinder attached at the top and bottom edges to flanged and grooved rings for keeping the cylinder stable. The collar means may be e... | 10/19/1999 |
| 5964215 | Heating installation with closed liquid circuit The invention relates to a heating installation comprising a closed liquid circuit which is under pressure during operation, in which are incorporated a heating boiler in which heat is supplied to a liquid circulating in the circuit and heat-generating me... | 10/12/1999 |
| 5927269 | Auxiliary vehicle heater An auxiliary vehicle heater includes a combustion air fan, an intermittently rotating, absorbent wick, a glow plug for initiating combustion and a water jacket surrounding a combustion chamber. Fuel is supplied to the rotating wick by a metering pump and ... | 07/27/1999 |
| 5911217 | Internally mounted flue damper with exterior free-standing damper drive This invention provides a water heater including a water storage tank, a flue, a jacket around the tank and the flue and having a top end, a top cover which extends over the tank and the flue and which closes the jacket top end, and a flue collector withi... | 06/15/1999 |
| 5899198 | Self clamping temporary foam dam for protecting water heater electrical components A removable dam provides a way to prevent liquid insulation from interfering with electrical components and from squirting out an opening in the jacket of a hot water heater.... | 05/04/1999 |
| 5898818 | Water feed system at constant temperature keeping the hot water from mixing with the cold water fed during use of the hot water in a single tank A water feed system at constant temperature keeping the hot water from mixing with the cold water in a single tank, the cold water being fed during use of the hot water, comprising a cold water filing tube, a solenoid of controlling circuit and a double l... | 04/27/1999 |
| 5878192 | Heating element for water heaters with scale control An improvement in electrical elements for a water heater includes a mass attached to the element for reducing the deposition of hard water scale on element surfaces, particularly in the return bend areas. In one embodiment, a flow accelerator tube enclose... | 03/02/1999 |
| 5872891 | System for providing substantially instantaneous hot water A water heater tank is designed to be installed within a wall to provide substantially instantaneous and continuous hot water when the faucet is activated. The tank maintains water at a hot temperature to be mixed, if necessary, with standing water from t... | 02/16/1999 |
| 5857482 | System for control of fluid vessel overflows An overflow control system includes a vessel having a liquid input and output, the vessel having a top and bottom defined by the gravity vector. The system further includes a housing peripherally surrounding the vessel about all surfaces, other than the b... | 01/12/1999 |
| 5848586 | Fire safety collar for gas water heaters An air inlet system for gas water heaters that prevents or delays the ignition of fumes from flammable liquids accidentally spilled on the floor. The air inlet is above the quickly combustible fumes from spilled liquids, allowing time for personal escape ... | 12/15/1998 |
| 5838879 | Continuously cleaned pressureless water heater with immersed copper fluid coil A pressureless electric water heater for domestic use has a cylindrical double-walled tank for holding a quantity of a heat transfer liquid such as water. Cold water enters a copper coil immersed in the heat transfer liquid. The heat transfer liquid is he... | 11/17/1998 |
| 5787229 | Electric hot water tank with layered storage An electric hot water heater tank is fitted with a plurality of separators that divide the tank into a plurality of chambers surrounding the tank axis and extending between the top and bottom walls. The adjacent chambers communicate alternately in a direc... | 07/28/1998 |
| 5761379 | Water heater capable of being hung from a support A water heater is capable of being hung from a support, and includes a water tank, a water inlet, a water outlet, and a jacket positioned around the water tank so as to define a space between the water tank and the jacket. Foam insulation is positioned in... | 06/02/1998 |
| 5725833 | Water buffered essential oils smokeless incensing system A water buffered essential oil non-open flame incensing system including a level fire plate with a metallic fire ring centrally bonded to the upper surface thereof. A stoneware urn is provided having a body portion with a pronounced belly, a bell lip, a t... | 03/10/1998 |
| 5690094 | Gas flame kettle A gas-flame heated, self-contained kettle comprises a housing (12); a gas burner (14) contained within the housing (12); a container (16) for the fluid (18) to be heated, positioned within the housing (12) and above the burner(14); and exhaust duct (22) l... | 11/25/1997 |
| 5642725 | Liquid heating apparatus A heating apparatus for a liquid includes a vessel (1) having a base and a side walls (2, 3), and a planar electrical element (5) integrated in the base wall (2). In order to render the apparatus efficient when only a small quantity liquid is to be heated... | 07/01/1997 |
| 5588088 | Hot water tempering system utilizing a storage tank, a bypass line and a proportional flow controller A hot water tempering system tempers the output of a hot water storage tank by mixing that output with a cold water flow in a defined ratio to produce a flow of water at a steady intermediate temperature. The system comprises a bypass line connectable bet... | 12/24/1996 |
| 5460161 | Campfire water heating apparatus and method An apparatus and method for heating and delivering water by use of a campfire, comprising drawing water from a first kettle through a supply hose to a heat exchanger that is placed in the campfire. The water in the heat exchanger boils to cause a discharg... | 10/24/1995 |
| 5441039 | Teapot capable of giving off sound while it pours A teapot has a handle provided therein with a receiving space shielded with a cover. The receiving space is intended to house therein a battery set and a circuit board comprising a sound-reproducing control circuit which is in turn composed of an integrat... | 08/15/1995 |
| 5437264 | Waste heat collector for domestic gas water heaters A heat collection apparatus which collects the lost or waste heat from a domestic gas water heater. This apparatus sits on top of the water heater over the flue, where the lost heat is directed through the collector fins on the coil into the hot water out... | 08/01/1995 |
| 5419308 | Gas-using water heater having a water pressure-controlled gas general switch a gas-using water heater having a water pressure-controlled gas general switch, wherein the water pressure-controlled gas general switch is disposed outside the water heater and is combined with the original manually operated gas general switch to form a ... | 05/30/1995 |
| 5417201 | Portable water heating system A portable thermosyphon water heating system for use by outdoor enthusiasts, or others at locations remote from a conventional supply of hot water. Water is heated by an open campfire flame in an enclosed heat exchanger, and is circulated between the heat... | 05/23/1995 |
| 5396878 | Hot water kettle Apparatus for heating water over an open fire comprises a kettle having a substantially flat bottom and an upstanding perimeter sidewall. Two openings are provided in the upper portion of the sidewall of the kettle. A water inlet tube extends through one ... | 03/14/1995 |
| 5356487 | Thermally amplified and stimulated emission radiator fiber matrix burner A combustion device for producing predetermined radiation spectral output and heat for a variety of applications including lighting, cooking, heating water, electric power generation, and providing inexpensive photons to enhance chemical and physical reac... | 10/18/1994 |
| 5341797 | Liquid heating apparatus In a liquid heating apparatus according to the present apparatus, an external drum comprising a dual wall is provided in a water tank, the external drum has a combustion gas distribution chamber formed in the dual wall, an internal drum having a combustio... | 08/30/1994 |
