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| Number | Title | Issue Date |
| 7337753 | Water heater The water heater includes a burner and a water tank. Combustion products flow upwardly around the tank through a combustion products path where heat transfer to water in the tank occurs, the path being defined between the outer wall of the tank and a surrounding hea... | 03/04/2008 |
| 7316206 | Water heater with noise attenuation A water heater comprising a tank defining a water chamber, a water inlet and a water outlet communicating with the water chamber, and a combustion tube extending generally vertically through the water chamber and having an upper end. The water heater also comprises ... | 01/08/2008 |
| 7249946 | Thermal generator and combustion method for limiting nitrogen oxides emissions by re-combustion of fumes The invention relates to a thermal generator comprising a furnace tube (2) wherein a fuel is burnt, recombustion means (14, 15) for reducing the nitrogen oxides content present in said fumes and means (3) for recovering the heat of the fumes res... | 07/31/2007 |
| 7138093 | Heat exchanger device A heat exchanger device is configured for use with a catalytic heater having a planar heat radiating surface. The device includes an inlet header, an outlet header and heat exchanger tubes communicating therebetween. A frame supports the headers and the heat exchang... | 11/21/2006 |
| 7047908 | Cooling flange An apparatus has a body with first and second faces, an inboard surface bounding a central aperture, an outboard perimeter, and an array of bolt holes between the first and second faces. A channel is inboard of the bolt holes and first and second ports communicate w... | 05/23/2006 |
| 7040258 | Low NOx water heater with serpentined air entry A fuel-fired low NOx water heater extending along a vertical axis has a radiant fuel burner disposed in its combustion chamber. The entire burner combustion air quantity is delivered to the burner from outside the combustion chamber via a horizontally serpentined fl... | 05/09/2006 |
| 6962193 | Tubular catalytic aircraft precooler A tube assembly for cooling an incoming fluid stream and destroying pollutants contained therein comprises a tube with a catalytic coating on its inner wall and an arrangement for disrupting laminar flow of the fluid stream as it transits the tube, thereby causing t... | 11/08/2005 |
| 6761134 | Water heater having self-powered low NOx burner/fuel-air delivery system A fuel-fired natural draft water heater is provided with a self-powered, low NOx burner system in which a thermoelectric generator is positioned to be heated by the water heater's fuel burner during firing thereof and used to power an auxiliary combustion air fan wh... | 07/13/2004 |
| 6725811 | Water heater with low NOx fiber matrix burner A water heater having improved operating characteristics and lower costs of manufacturing is described. The water heater has an unified combustion chamber and burner construction with a ceramic fiber matrix burner. ... | 04/27/2004 |
| 6698385 | Combustion chamber shield for hot water heaters A shield for a combustion chamber of a hot water heater is described. The combustion chamber is a sealed or not combustion chamber and the metal heat shield encircles and is spaced about the burner and pilot which is located in the combustion chamber. The... | 03/02/2004 |
| 6446581 | Flammable vapor resistant water heater with low NOx emissions A water heater including a water container, a combustion chamber adjacent the container, the combustion chamber having a side wall and at least one flame arrestor to admit air and extraneous fumes into the combustion chamber and confine ignition and combu... | 09/10/2002 |
| 6418884 | Fuel-fired heating appliance having flame arrestor plate with associated scale deflector shield A fuel-fired heating appliance, representatively a gas-fired water heater, has a combustion chamber with a flame arrestor plate forming a bottom wall thereof. The arrestor plate has a spaced series of flame quenching perforations therein through which com... | 07/16/2002 |
| 6244223 | Power burner type fuel-fired water heater with quick change manifold assembly A power burner type gas-fired water heater has a fuel supply manifold which is mounted within a sealed plenum box and supplied with gas from a valve externally mounted on the plenum box and coupled to the manifold via a flex hose disposed within the plenu... | 06/12/2001 |
| 6142106 | Air inlets for combustion chamber of water heater A water heater that includes a water container, a combustion chamber, adjacent the water container, having at least one inlet to admit air and extraneous fumes into the combustion chamber, at least one inlet comprising a metal plate about 0.4 to 0.6 mm in... | 11/07/2000 |
| 6085738 | Multi-fuel burner and heat exchanger 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... | 07/11/2000 |
| 5924390 | Water heater with co-located flue inlet and outlet A blower draws air through an inlet duct from outside a building or dwelling and injects air and fuel into a sealed combustion chamber where they are ignited and burned within a ceramic crucible within combustion chamber. The pressurized combustion gases ... | 07/20/1999 |
| 5769033 | Hot water storage Apparatus for heating and storing water comprises a tank 10 for holding a quantity of water 15 within a space 11 between studs 12 in a wall or like surface 13 of a room 14. An inlet conduit 16 conveys water into the tank 10, and an outlet conduit 17 conve... | 06/23/1998 |
| 5494025 | Heat exchanger for multi oil furnaces A heat exchanger for a multi oil furnace is disclosed wherein the external cabinet shell houses a central ventilation chamber divided into inlet and outlet sides by a generally vertical barrier. Combustion gases flow from the burner chamber into an upper ... | 02/27/1996 |
| 5490495 | Cleanout header for multi oil furnaces A multi oil furnace is disclosed wherein the front door is sealable against the burner chamber and against a lip extending around the circumference of a front header formed in the cabinet shell to operatively interconnect an upper bank of heat exchanger c... | 02/13/1996 |
| 5405261 | Waste oil fired heater with improved two-stage combustion chamber An improved two-stage combustion chamber for burning waste hydrocarbons such as crank case oil, spent motor oil, transmission fluid, lubrication dopes, and heavy bodied gear lubes. The combustion chamber is formed from a plurality of spaced apart, stacked... | 04/11/1995 |
| 5279261 | Downfired boiler having vertical heat transfer tubes A water-heating boiler of the tube-shell type is designed, so that the heat transfer tubes are vertically oriented. During movement of the hot combustion gases, from the large combustion tube into the smaller heat transfer tubes, the directional change in... | 01/18/1994 |
| 5022352 | Burner for forced draft controlled mixture heating system using a closed combustion chamber An improved fuel and air admixture burner for water heating and/or space heating appliances comprises concentrically arranged inner and outer sheet metal tubes closed at their top ends and the inner tube open at its bottom end through which a combustible ... | 06/11/1991 |
| 4862835 | Combustion system for burning heavy heating oil with low nox A flame-tube boiler is provided with a system of burners for the low-NOx combustion of heavy oil, with an air box (8) that communicates with the cooled flame tube (1) by way of a central primary-air channel (16) that surround an oil-burner lanc... | 09/05/1989 |
| 4737101 | Oil burner An oil burner of the air atomizing or vaporizing pot type has means to supply oil and combustion air to a combustion chamber adjacent a fluid chamber which receives heat therefrom. Heated fluid is removed from and cooler fluid supplied to the fluid chambe... | 04/12/1988 |
| 4719877 | Fuel preheater A fuel preheater for use on a boiler fired by an oil burner of the type using an oil pump pumping oil from a tank, the boiler being of the type having a supply line carrying a heated medium from the boiler, the preheater having a coil member wrapped aroun... | 01/19/1988 |
| 4665894 | Gas-heated or kerosene-heated boiler for warm water, hot water or steam generation The invention relates to a gas-heated or kerosene-heated boiler for warm water, hot water or for steam generation having a substantially horizontal cylindrical combustion chamber defined and surrounded by a flue tube (1) consisting of a plurality of annul... | 05/19/1987 |
| 4633820 | High-efficiency thermal group A thermal plant comprises a clear blue flame burner and a multi-tank boiler of stainless steel. The burner has a nosepiece welded to the boiler and a rear portion removably fixed to the nosepiece. The rear portion of the burner includes a labyrinth pathwa... | 01/06/1987 |
| 4624216 | Furnace for burning oil or gas A furnace for burning oil or gas. The furnace has a vertical, cylindrical water jacket, with a combustion chamber being disposed at the upper end of the furnace, and a flue gas collector being disposed at the bottom end of the furnace. At least one ancill... | 11/25/1986 |
| 4545329 | Water heater A water heater is shown which has a water tank having a water inlet, a water outlet, and an opening in a sidewall of the tank. A combustion chamber assembly has a submergible portion which is adapted to be received within the opening in the tank sidewall.... | 10/08/1985 |
| 4499858 | Fuel burning assembly An improved fuel burning assembly particularly adapted for use with a boiler having a fire box situated below an array of boiler tubes. The assembly discharges a number of spaced rotating streams of minute droplets of a flowable fuel both laterally and lo... | 02/19/1985 |
| 4493308 | Radiant/conductive broiler A broiler for cooking food products has an upper heating unit located in a spaced relationship from the food and a lower heating unit in a close heat transfer relationship with the food. The upper unit is preferably a U-shaped radiant fire tube with a gas... | 01/15/1985 |
| 4465024 | Water heater A water heater is shown which has a water tank having a water inlet, a water outlet, and an opening in a sidewall of the tank. A combustion chamber assembly has a submergible portion which is adapted to be received within the opening in the tank sidewall.... | 08/14/1984 |
| 4432307 | Gas- or liquid-fired hot water boiler A boiler is disclosed comprising a heat exchanger having a plurality exchanger modules which are plugged in upper and lower headers connected in the heating circuit of a central heating system. The headers are secured to the rear wall of a casing and the ... | 02/21/1984 |
| 4413590 | Boiler for a heating system A liquid or solid fuel-fired boiler for a central heating system is disclosed comprising a combustion chamber and a heat exchanger arranged therearound and connected in a heating fluid circuit comprising an upper header and a lower header interconnected b... | 11/08/1983 |
| 4398502 | Water heater with up-down flow flue An efficiency and safety and economy-improved water heating system with a water-containing casing around a coaxially central upright flue having a combustion chamber at the bottom which is open for the purpose and a closed upper end, and, connecting with ... | 08/16/1983 |
| 4391227 | Fluid-heating apparatus A fluid-heating apparatus comprises a ceramic burner head formed with narrow passages which alternate with one another for fuel and a combustion sustaining medium such as air, the slit-like passages opening into a combustion chamber at which combustion of... | 07/05/1983 |
| 4390007 | Fuel preheater Apparatus and method for the preheating of oil before combustion in an oil burner utilizing a cannister containing a coil adapted for oil to circulate therethrough which cannister being further adapted for hot water of the heating system to circulate ther... | 06/28/1983 |
| 4380215 | Liquid fuel-fired water heating tank A water heating tank is disclosed which includes an annular water receptacle having a vertical passageway extending centrally therethrough and opening at its lower end into a plenum chamber beneath the receptacle. An annular combustion chamber assembly ex... | 04/19/1983 |
| 4373472 | Water heater A water heater has a closed container of approximately circular cross-section, a housing surrounding at least a lower part of the water container, the housing being closed by a base and forming, with the base of the water container, a gas-tight combustion... | 02/15/1983 |
| 4303042 | Water heater A water heater incorporating a cylindrical heat exchanger installed laterally in the lower part of a water tank. The interior of the heat exchanger has a plurality of circular baffles spaced transversely of the interior. An exhaust pipe covered with a hea... | 12/01/1981 |
