Matches 1 - 50 out of 79 1 2 >
Match Document Document Title
7299769 Condensing gas fired water heater  
A water heater is shown having a closed metal tank with an upwardly mounted combustion chamber and burner/blower assembly. Curved fire tubes convey the products of combustion from the chamber to an...
7290503 High efficiency, wet-base, downfired multi-pass water heater  
A fuel-fired water heater has a three-pass condensing type heat exchanger disposed within its tank and having a central vertical first pass flue pipe separated into upper and lower portions by an...
7159540 Water heater with air intake and exhaust system  
A water heater including a water container; a combustion chamber adjacent the water container; a burner associated with the combustion chamber; a blower assembly located to receive combustion...
6957629 Water heater flue with improved heat transfer  
A water tank has a central flue to which clips are welded. The clips define baffles and are welded to have a greater heat transfer area where they are joined to the central flue. The individual...
6880547 Wood burning swimming pool heater  
A swimming pool heater that heats a private swimming pool and can be used to provide heating for a house, a cottage or a commercial swimming pool. Wood, that is often found around pools, is used as...
6698386 Water heater  
An improved gas-fired water heater is disclosed which comprises a sealed cylindrical shell extending from the base of the water tank to the top, enclosing the burners and controls so as to shield...
6681723 Hot water heater  
The present invention is directed to an apparatus for heating hot water. The present apparatus utilizes at least two individual hollow conduits that pass through the interior of a hot water tank....
6311646 Hot water heater  
A hot water heater having a housing with a top chamber, a bottom chamber and a main tank. A cold water inlet pipe runs into the top chamber and extends into the tank. The cold water inlet pipe...
6305331 Boiler fitted with a burner  
This invention concerns a boiler fitted with a burner suitable for wall heaters or built-in kitchen heaters in which a mantle-shaped heat exchanger made of pipe elements connected in parallel...
6293230 Water heaters with flame traps  
A gas water heater including a water container adapted to be heated by a gas burner; and an enclosure surrounding the burner, the enclosure having at least one entryway adapted to allow air and...
6223698 Device for producing hot water  
The invention concerns a device for producing hot water comprising at least one burner (13) arranged to produce rapid combustion inside the combustion chamber. The combustion chamber consists of a...
6161506 Pulsed air combustion high capacity boiler  
A pulsed combustion high capacity boiler has air inlet flapper valves at an inlet air decoupler toward a combustion chamber, with a fuel supply and an ignitor upstream of the combustion chamber...
6152083 Compact gas fired water heater with improved combustion chamber  
A compact gas fired water heater is provided for recreational vehicles or the like, with higher recoveries and greater efficiencies resulting from increased heating surface and smoother flow of...
5772422 Burner array for water heating apparatus  
The invention relates to a water heating apparatus which uses a submergible, pressurized combustion chamber having multiple external heating surfaces, a forced draft burner and a flue collector...
5699756 Wet-base, down-fired water heater  
A fuel-fired, forced draft, down-fired water heater is provided with an improved combustion product flow path that permits the heater to operate with improved fuel efficiency, lowered CO and NOx...
5666944 Water heating apparatus with passive flue gas recirculation  
The invention relates to a water heating apparatus and method to passively recirculate flue gas in order to reduce NO x emissions formed during combustion. The apparatus uses a high efficiency...
5666943 Water heater or boiler with improved tank design  
A water heater/boiler design is shown having a tank with a submergible, pressurized combustion chamber and a resilient sealing means which divides the interior of the water heater tank into a...
5636598 Induced draft combustion water heater  
A water heater includes a tank and an exhaust blower is located below the tank and connected to the exhaust line to draw the combustion products by suction through the coil-shaped heat exchanger,...
5437249 Combination burner and flue gas collector for water heaters and boilers  
A water heater is shown having a closed tank with an opening for receiving a combustion chamber, the interior of the tank normally containing water under pressure. A combustion chamber is located...
5357907 Water heater with reduced localized overheating  
A water and/or space heater is provided in which water is circulated to prevent the localized overheating or vaporization thereof.
5320522 Gas Burner with combustion grille, its combustion process, and heating installation comprising such a burner  
Burner fed with combustive air and combustible gas, comprising a distribution chamber (3) communicating with a combustion chamber (11), with interposition between them of a combustion grille (13)....
5313914 Potable hot water storage vessel and direct-fired heat exchanger  
The inner surface of a hot water storage vessel is lined with a removable rigid plastic liner layer with injected foam insulation located between the liner and storage vessel. A heat exchanger is...
5207212 Submersible high-efficiency combustion chamber for a water heater  
An apparatus for heating water in a water tank includes a first tubular member and a second tubular member that has an input end and an exhaust end. The second tubular member is disposed at least...
5207211 Multiple U-tube down fired water heater  
The top storage tank end wall of a down-fired water heater has a first circumferentially spaced series of circular openings formed therethrough and centered about the tank axis, and a second...
5197415 Wet-base, down-fired water heater  
A fuel-fired, forced draft water heater is provided with a specially designed burner structure and combustion product flow path that permit the heater to operate with improved fuel efficiency,...
5195502 Down-fired U-tube water heater  
A down-fired water heater has a top storage tank head portion with a central opening bordered by an upstanding annular flange. Welded within this flanged opening is a generally pan-shaped tube...
5179914 Forced draft water heater with an improved tank structure and a method for making water heaters  
A fuel fired, high capacity, high efficiency water heater uses a cylindrical plastic tank. The strength of the plastic tank is maintained by keeping the side wall imperforate and providing all...
5162104 Apparatus and method for indirectly heating a gas  
A stream of process gas is indirectly heated in an elongated reaction chamber (1) with a longitudinal axis, a first end (12) and a second end (13) and defined by an outside shell (2) and a...
5115798 Condensate trap  
A condensate trap in the exhaust gas conduit of a forced draft water and space heater comprises a housing providing a chamber open at its upper end to the exhaust conduit and having a condensate...
5105799 Portable fluid heater  
A portable fluid heating unit which may be used for supplying warm water to divers which includes a three stage heat exchange system wherein a fluid source, such as sea water, is initially heated...
5085579 Powered chamber combustion system and burner therefor  
A forced draft gas burning water and/or space heater having a screen type vertically extending tubular burner provided with a deflector plate supported transversely within the burner tube for free...
5022379 Coaxial dual primary heat exchanger  
Basically the present invention in its most simple form or embodiment is directed to a heat exchanger which provides for at least two heat exchange surfaces and which has the combustion of the...
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...
4993402 Fuel efficient rapid response water heating module  
A water heating module. The module is adapted for heating water for general residential and commercial use and as a supply for a hydronic heating system. The module is capable of supplying a large...
4981112 Potable hot water storage vessel and method of manufacture  
A potable, hot water storage vessel is shown with a metallic body having a water inlet, water outlet and at least one additional opening communicating the vessel interior and exterior. A flexible,...
4969420 Magnesium pressure vessel water tank  
This invention pertains to a magnesium water heater and a method of fabricating the same. The magnesium water heater of the present invention can be heated by an electric resistance element or a...
4938204 Water heater or boiler with improved thermal efficiency  
A water heater/boiler design is shown having a tank with a submergible, pressurized combustion chamber so that all of the heating surfaces of the combustion chamber are submerged under water. The...
4926842 Immersion tube heater treater improved immersion tube heater treater  
An improved immersion tube heater means is disclosed for uniformly and reliably heating oils to a temperature below the oil's critical physical breakdown temperature so as to avoid damage to the...
4877014 Tube arrangement for heat exchanger  
A tube arrangement for a tube-type heat exchanger. The tube arrangement provides for the location of the tubes in the upper portion of the drum defining the combustion chamber of the heat...
4875465 High efficiency submersible chamber water heater  
A submersible chamber water heater having improved efficiency. The water heater includes a tubular member that is mounted in an opening in the tank and defines a combustion chamber. A fuel-air...
4869208 Compact modular fluid storage and heating system  
A modular fluid storage and heating system is provided which includes a plurality of different, interconnectable tank components of standardized dimensions such as fluid storage tanks, closure...
4790268 Submersible chamber water heater  
A water heater having improved efficiency. The water heater includes a tubular member that is mounted in an opening in the side of the tank and extends generally horizontally across the tank. The...
4771762 Water heater for recreational vehicle  
An improved compact water heater is provided for use in recreational vehicles and the like, wherein the water heater is designed for facilitated assembly and for increased heat transfer capacity to...
4766883 Forced draft controlled mixture heating system using a closed combustion chamber  
A high efficiency forced draft water and space heater maintains a desired air to fuel ratio and efficiency in combustion regardless of changes in air inlet pressure. The heater uses a venturi type...
4677939 Heat exchanger and application to a fluid heating apparatus, particularly a domestic hot water accumulator  
The apparatus for heating a fluid comprises a heating enclosure supplied in its lower part with fluid to be heated, a combustion chamber comprising a burner at one of its ends and extending on the...
4664096 Oil and gas water heater  
An oil and gas fueled hot water heater system having improved efficiency and performance embodies air and fuel regulator valves, water and air supply jackets, cold and hot water insulating check...
4651714 High efficiency water heater  
A water heater having improved efficiency. The water heater includes a tubular member that is mounted in an opening in the side of the tank and extends horizontally across the lower portion of the...
4641631 Apparatus and method for burning a combustible gas, and a heat exchanger for use in this apparatus  
An apparatus functioning as a high-efficiency water heater. This apparatus passes a combustible mixture of gas and air from an impeller into the hollow interior of a cylindrical gas burner. The...
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....
4590888 Water heater  
A water heater having a burner unit and a combustion chamber from which the combustion gases are discharged and deflected into an annular out-flow space through which they flow along a heat...
Matches 1 - 50 out of 79 1 2 >