| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 122170100 | Fluid fuel burner | 54 |
| 20100154723 | ULTRA LOW NOx WATER HEATER | 06-24-2010 |
| 20130074786 | GAS WATER HEATER WITH INCREASED THERMAL EFFICIENCY AND SAFETY - A gas water heater having increased thermal efficiency comprises a water tank having a sealed combustion chamber thereunder. An atmospheric burner is located in the combustion chamber. A flue pipe extends from the sealed combustion chamber and through the water tank for heat exchange of hot atmospheric gas therein with water in the water tank. A heat exchanger is in communication with the combustion gases exiting the water tank to extract residual heat from the combustion gas in the flue pipe for mixture with ambient air to produce pre-heated combustion air. An air convection or draft inducing device directs the hot combustion air from the heat exchanger through a sealed conduit to direct the pre-heated combustion air to the combustion chamber. | 03-28-2013 |
| 20130092104 | FAN HOUSING FOR A FAN FOR SUPPLYING A FUEL/OXIDIZER MIXTURE TO A BURNER, INSERT AND SUPPLY DEVICE THEREFOR - Fan housing for a fan for supplying a fuel/oxidizer mixture to a burner, comprising: a supply opening ( | 04-18-2013 |
| 20090188447 | Condensing Side-Arm Water Heater - An apparatus for providing a condensing side-arm water heater with improved efficiency. The condensing side-arm element recirculates exhaust gases into heating the cooler part of a water heater tank by the thermosiphon (or buoyancy) effect in a counterflow configuration, thus increasing efficiency of the water heater. | 07-30-2009 |
| 20100192874 | PULSE COMBUSTION SYSTEM FOR A WATER HEATER - A water heater. The water heater includes a water circuit adapted to conduct water to be heated, a combustion system operable to produce products of combustion and operable to provide the products of combustion to heat water in the water circuit, and a fuel train assembly configured to provide fuel to the combustion system. The fuel train assembly includes a gas expansion chamber, a first gas shut-off valve positioned upstream of the expansion chamber, and a second gas shut-off valve positioned downstream of the expansion chamber. | 08-05-2010 |
| 20100294214 | BURNER FOR GAS BOILER - The present invention relates to a burner for gas boiler that produces stable combustion without lifting of flame by stably guiding gas and primary and secondary air to the inside of an upper plate and having a first slope having main fire holes to improve efficiency of ignition and combustion in a burner main body, in which a gas mixture channel is formed by a guide plate disposed at the center of the burner main bodyburner bodyor stable mixing of gas and the primary air. | 11-25-2010 |
| 20110083618 | BURNER - A gas burner including a burner body having a lower housing, an inlet conduit and a combustion surface element attached to the lower housing. A diffuser/reflector positioned within the body encourages even distribution and mixing of a combustible gas/air mixture. The diffuser/reflector is preferably of a sheet metal construction and includes a plurality of stamped openings with each of these openings having an overhanging guide plate. The combustion surface element includes a plurality of integrally formed rigidizing ribs and is made from a high temperature steel alloy wire cloth. The inlet conduit is secured directly or indirectly to an access door/bulkhead that is used to close off an access opening formed in a water heater wall through which the burner is installed. In one construction, an air scoop shrouds the inlet conduit and at least partially defines a flow path of primary air, substantially isolated from the combustion chamber. | 04-14-2011 |
| 20100282185 | BURNER AND METHOD FOR IMPLEMENTING AN OXYCOMBUSTION - The invention relates to a method of combustion of a fuel using an oxygen containing gas and at least one mainly inert gas, in which:
| 11-11-2010 |
| 20100116225 | Integrated Dual Chamber Burner - A dual chamber burner assembly is provided for use with a heater apparatus having dual combustion air premix blowers. The burner assembly includes first and second interior zones communicated with first and second foraminous outer wall portions. First and second fuel and air inlet passages are communicated with the first and second interior zones, respectively. | 05-13-2010 |
| 20090173291 | Gas and electric heating system - The gas and electric heating system has combination gas and electric heat generators to provide energy to a steam-generating boiler. The system utilizes a blue-flame, gaseous-fuel burner disposed externally of the boiler in one embodiment and a flame jet burner in a second embodiment. Electrical heating elements are positioned inside the boiler. Steam generated in the boiler flows to a heating core. The core is positioned in an air duct. Heat is transferred from the core to air flowing through the duct. The heated air flows from the duct into an area to be heated. Controls are provided to correlate the functions of the various components in the system. | 07-09-2009 |
| 20110303164 | INTEGRATED CONTACT CONDENSING WATER HEATER - An apparatus for heating water having three vertically aligned water heating process sections. The upper section includes an annular water storage tank disposed around a combustion chamber having a downward firing burner. The intermediate section, disposed vertically below the upper section receives flue gas from the combustion chamber, which flue gas is cooled and dehumidified, producing a hot condensate which collects in a passive condensate flow control device disposed proximate the bottom of the intermediate section. The lower section, disposed vertically below the intermediate and separated therefrom by the passive condensate flow control device receives hot condensate from the flow control device, which is used to preheat and humidify air, such as room air, which is then recycled to the combustion process of the upper section for use as combustion air. This passive condensate flow control device uses gravity to inject condensate, thereby facilitating a system design that only requires a single condensate pump. | 12-15-2011 |
| 20120298053 | AIR:FLUID DISTRIBUTION SYSTEM AND METHOD - A valve assembly including a block forming a bore. An air inlet opening is in communication with the bore, and provides a volume of air into the bore. The bore provides communication between the air inlet opening and at least one air outlet passage. A fuel inlet opening is in communication with the bore, and provides a volume of fuel into the bore. The bore provides communication between the fuel inlet opening and at least one fuel outlet passage. A pintle is slidably positionable within the bore to control the volume of air directed out of the bore through the air outlet passage and the volume of fuel directed out of the bore through the fuel outlet passage. | 11-29-2012 |
| 20120090561 | GAS WATER HEATER WITH WASTE GAS PURIFICATION AND FILTRATION FUNCTIONS - A gas water heater includes a gas water heater main unit having an exhaust pipe attached thereto for guiding out waste gas during burning of a fuel gas to heat water, an ozone generator installed in the exhaust pipe and electrically connected to an external power source for generating ozone into the exhaust pipe to mix with the waste gas produced during operation of the gas water heater main unit, and a gas filter installed in the exhaust pipe for removing solid matters from the waste gas passing through the exhaust pipe. | 04-19-2012 |
| 122170200 | Liquid fuel burner | 1 |
| 20080223313 | HIGH EFFICIENCY WATER HEATER - An application for a method of heating water includes burning fuel to produce hot gases and heating a first mass of water with a first heat exchanger coupled to the hot gases. Heat remaining after the hot gases pass through the first heat exchanger is used by a second heat exchanger to heat a second mass of water. The first mass of water is partially isolated from the second mass of water and the first mass of water is contained substantially within the second mass of water. The second mass of water is colder than the first mass of water and, thereby, condenses more water vapor out of the hot gases. | 09-18-2008 |
| 122180100 | Having heat exchange feature | 37 |
| 20130042823 | HEAT EXCHANGER INCLUDING WASTE HEAT RECOVERY - Disclosed is a heat exchanger, and a method for heating a working fluid. The heat exchanger includes a burner, a combustion section, and a condenser section positioned below the combustion section such that exhaust from the burner passes through the spiral coils and to the condenser. In an example of this disclosure, the combustion section includes a plurality of spiral coils radially spaced apart relative to one another, and the condenser section includes a plurality of U-bend coils. | 02-21-2013 |
| 20100043727 | HEATING SYSTEM - A heating system for heating a fluid, the system comprising two separate heat exchangers, each directly heated by a burner to heat the fluid, a common flue into which the two burners are arranged to discharge their exhaust gas, a common fan arranged to supply air to the two burners, and a gas supply to each burner. A splitter valve splits the air flow from the fan to the two burners. A controller controls the speed of the fan, the position of the splitter valve and the gas supplies according to the heat output requirement of the system. | 02-25-2010 |
| 20130061821 | COMBUSTION APPARATUS - An exhaust channel of a combustion apparatus is defined by an upper sloping plate and a lower sloping plate. The lower sloping plate contains a rising part and a lower sloping wall. A water droplet baffle plate is positioned across an interspace from the rising part. The interspace is brought into fluid communication with the exhaust channel through an upper surface opening while being brought into fluid communication with a bottom of a heat exchange chamber through a communication opening. A collision wall part of the water droplet baffle plate is disposed in close proximity to a lowest fine tube so as to oppose against a combustion exhaust flow. Water droplets adhere onto the collision wall part. Water droplets failing to adhere to the collision wall part fall through the upper surface opening positioned over an upper end of the collision wall part. | 03-14-2013 |
| 20110041781 | COIL TUBE HEAT EXCHANGER FOR A TANKLESS HOT WATER SYSTEM - A novel water heat exchanger with a helix coil incorporated into a stainless steel elongated variable diameter cylindrical housing. A buffer tank is incorporated within the lumen of the helix coil. In one embodiment, the heat exchanger utilizes a radial direct-firing burner and a blower-driven hot flue gas to heat water for domestic and commercial use. In one embodiment, at least a rope seal is disposed between adjacent coil loops of a portion of the helix coil for enhancing heat transfer to the helix coil. In one embodiment, solar and electric heating systems are combined with the helix coil heat exchanger and disposed within the buffer tank to provide supplemental heating. In another embodiment, the heat exchanger further comprises a Stirling engine comprised of a free piston having hot and cold ends that is disposed within the cavity taken up the buffer tank, wherein the hot end receives heat from the burner and the cold end is cooled by the incoming cold water line to form an electric power generator. | 02-24-2011 |
| 20100031900 | LOW COST TANKLESS PORTABLE WATER HEATER - A portable tankless water heater includes a heat exchanger disposed in a sealed housing with an inlet cold water line and an outlet hot water line extending outside the sealed housing. A burner, disposed in an operative relationship with said heat exchanger is provided for heating water flowing through said heat exchanger and an exhaust system induces draft of air from a housing air inlet through said heat exchanger and out of a housing flue outlet. | 02-11-2010 |
| 20080251034 | FORWARD COMBUSTION TYPE CONDENSING GAS WATER HEATER - A forward combustion type condensing gas water heater is provided including a burner, a primary heat exchanger, a drain pipe for condensation water, a gathering and discharge device for condensation water, a secondary heat exchanger. The gathering and discharge device and the secondary heat exchanger have center lines different from the primary heat exchanger. Flue gas rises through the primary heat exchanger and passes through the secondary heat exchanger in a direction staggered with respect to the falling direction of condensation water. The condensing gas water heater effectively avoids resistance between the condensation water and the flue gas and prevents the condensation water from flowing to the burner, the combustion chamber, and the ignition pin. | 10-16-2008 |
| 20080264355 | WATER HEATER - The object is to provide a water heater capable of efficiently transmitting radiation heat of a burner to hot water in a hot water storage chamber, and improving thermal efficiency. In water heater, a second restriction part having a shallower depth than a restriction part is partially arranged along a peripheral edge of a lower mirror plate of a hot water storage chamber, a protrusion part protruding in a ring shape toward the center side of the lower mirror plate is arranged between the restriction part and the second restriction part, and a burner is provided so as to position a burner head of the burner to face the protrusion part. | 10-30-2008 |
| 20100300378 | BOILER WITH VARIOUSLY-SHAPED HEAT EXCHANGE ELEMENTS - There is described a boiler ( | 12-02-2010 |
| 20100307428 | FUEL COMPOSITION - A domestic heating fuel composition, comprising (a) a paraffinic hydrocarbon composition comprising at least 90 wt % normal paraffins and/or iso-paraffins comprising from 6 to 24 carbon atoms, wherein the weight ratio of iso-paraffins to normal-paraffins is below 6 to 1, and (b) at least one compound having a C/H molar ratio of above 0.8 and soluble in component (a) at ambient conditions, wherein the component (b) is present in the fuel composition in an amount effective to increase the responsiveness of a yellow/red flame detector to a required threshold level. | 12-09-2010 |
| 20100018475 | HIGH EFFICIENCY WATER HEATER - An application for a method of heating water includes transferring the water from a water supply into an inner tank of the water heater which is held within an outer tank, transferring the water from the inner tank into an outer tank and then to supply a building with hot water. The water in the outer tank is heated with hot gasses, partially cooling to intermediate temperature gasses. The water in the inner tank is heated with the intermediate temperature gasses, further cooling the intermediate temperature gasses into cooler gasses that are then exhausted out of the water heater. | 01-28-2010 |
| 20110185985 | Fluid heating apparatus - A fluid heating apparatus for use in water heaters, boilers, cooking applications or the like comprising a body. The fluid heating apparatus also comprises a primary heat exchanger arranged within the body and a secondary heat exchanger arranged adjacent to the primary heat exchanger within the body. The apparatus also comprises a burner arranged within the primary heat exchanger. The primary heat exchanger comprises a plurality of concentric doughnut shaped plates arranged over the burner. A blocking plate is arranged adjacent to one of the concentric plates of the primary heat exchanger. The secondary heat exchanger comprises a plurality of concentric doughnut shaped plates arranged adjacent to the blocking plate on a side opposite of the plates of the primary heat exchanger. The apparatus further comprises a manifold in fluid communication with the plurality of concentric plates and blocking plates of both the secondary heat exchanger and primary heat exchanger. | 08-04-2011 |
| 20110185986 | PROPANE OR DIESEL POWERED HEATER WITH COMMON BURNER OPENING - A coolant heater having a coolant tank and a burner tube within the coolant tank is used for marine and motor coach installations and is used for either a liquid powered or gas powered burner. | 08-04-2011 |
| 20100064987 | GAS WATER HEATER - A gas water heater includes a power burner, a flue tube, an exhaust plenum, and a draft hood. The flue tube includes a portion that describes at least a 360° loop. Products of combustion are forced through the flue tube under the influence of the power burner, and enter the exhaust plenum. In the exhaust plenum, the pressure of the products of combustion drops such that the products of combustion flow into the draft hood substantially entirely under the influence of natural convection. In one embodiment, the power burner fires down into the flue tube through a side wall of the water heater, the loop of the flue tube is near the bottom of the water heater, and the plenum is in the top of the water heater. | 03-18-2010 |
| 20100288209 | HEAT EXCHANGER FOR A BOILER - A heat exchanger for a boiler comprises a central chamber for receiving a combustion gas. A baffle divides the central chamber into a first section and a second section. The baffle also restricts the combustion gas from flowing directly from the first section of the central chamber to the second section of the central chamber. There is a plurality of spaced-apart flues disposed about a periphery of the central chamber. The flues allow for communication between the first section of the central chamber and the second section of the central chamber, in particular, the flues allow for combustion gas to flow from the first section of the central chamber to the second sections of the central chamber. | 11-18-2010 |
| 20110308481 | WATER HEATER BLOWER HOUSING - A fuel-fired water heater includes a water storage tank, a flue positioned to receive combustion gases and transfer heat from combustion gases to water in the water storage tank, and a blower assembly. The blower assembly includes a housing defining an inlet positioned to receive combustion gases from the flue, an interior defined by the housing, and an outlet positioned to exhaust combustion gases from the interior of the housing. The blower assembly further includes a motor/impeller assembly that is positioned in the interior of the housing and is configured to direct combustion gases from the inlet of the housing toward the outlet of the housing. The housing of the blower assembly includes an interior wall portion, an exterior wall portion, and sound-absorbing material interposed between the interior and exterior wall portions. The interior wall portion defines perforations extending between the sound-absorbing material and the interior of the housing. | 12-22-2011 |
| 20120090562 | STOREAGE GAS WATER HEATER - A gas water heater includes a water tank, a combustion chamber, a burner, a heat exchanger tube at least partially within the water tank, and a fan. The burner receives fuel gas and primary air to create a primary air-fuel mixture for combustion in the combustion chamber with secondary air. The primary air-fuel mixture has a gas concentration above the upper explosive limit of the fuel gas. Secondary air is supplied to the combustion chamber through a secondary air conduit that is separate from the burner. The heat exchanger tube receives the products of combustion, transfers heat from the products of combustion to water in the tank, and exhausts of the products of combustion. Only air flows through the fan; no fuel-air mixture flows through the fan. The water heater utilizes partial premix combustion with low excess air ratio and low contaminant emission. The water heater utilizes a high power burner such that the water heater can supply hot water continuously during low flow rate draws and hot water stored in the tank supplements the hot water supply of the water heater during higher flow rate draws. | 04-19-2012 |
| 122180200 | Preheater | 2 |
| 20110067650 | WATER HEATER MODULE HAVING DETACHABLE HEAT EXCHANGER - A water heater module of the present invention includes a water heater and an extra heat exchanger. The extra heat exchanger has a spiral pipe and is detachably connected to the water heater. The spiral pipe is heated by high temperature gas from the water heater to pre-heat cold water in the pipe, and then the water is sent to the water heater for further heating that the temperature of the water will be raised within a short time. | 03-24-2011 |
| 20100229804 | Single Can-Type Composite Heat Source Machine - In a single can-type composite heat source machine including a single can body ( | 09-16-2010 |
| 122180300 | Fire tube or flue surrounded by water containing chamber | 16 |
| 20100043728 | WATER HEATER - A storage-type water heater includes a tank enclosing a volume of water, the tank having an upper portion and a lower portion, a chamber adjacent the lower portion of the tank and adapted to at least partially enclose a source of a heated fluid, and a helical tube heat exchanger at least partially enclosed within the tank and fluidly connected to the chamber. The helical tube directs the heated fluid from the lower portion to the upper portion of the tank and promotes heat exchange between the water in the tank and the heated fluid flowing therethrough. | 02-25-2010 |
| 20090241858 | WATER HEATER WITH HIGH EFFICIENCY BAFFLES - A water heater for exchanging heat between hot gasses and water within the water heater. The water heater includes a water tank, a conduit for allowing flow of the gasses therethrough, the conduit extending through the tank and promoting heat exchange between the gasses and water in the tank, and a baffle extending within the conduit for affecting the flow of the gasses. The baffle includes a sheet bent in a zig-zag manner and having a number of plate sections. Each plate section has a through-flow portion allowing the gasses to flow therethrough. The sheet also has a number of first bends and a number of second bends, the first bends alternating with the second bends such that each plate section is defined between one first bend and one second bend. | 10-01-2009 |
| 20090165733 | Inwardly firing burner and uses thereof - An inwardly firing burner design is shown which can be used in a variety of heating applications. A water heater apparatus is also shown which includes a water heating tank having generally cylindrical sidewalls with upper and lower ends, each of which is closed by a transverse wall section to define a closed tank interior. The tank also has a water inlet and a water outlet. A plurality of vertically arranged fire tubes are connected between the upper and lower transverse wall sections, each fire tube having an open interior for conducting products of combustion. A burner assembly is mounted on the tank which features the inwardly firing construction that eliminates the need for an external combustion chamber. | 07-02-2009 |
| 20080251035 | Burner Flashback Detection and System Shutdown Apparatus - A fuel-fired water heater is provided with a premixing type main burner and an associated pilot burner for igniting it. A specially designed protective system is operative to detect a flame flashback burning condition in the main burner and responsively shut down the water heater. In one embodiment thereof, the protective system uses main burner body heat to melt a portion of a fuel supply line connected to the pilot burner during a flame flashback condition in the main burner. Such melting responsively causes an associated fuel supply valve to close and terminate water heater operation. In a second protective system embodiment a normally closed pressure switch is opened, thereby shutting down the water heater, when the switch detects a pressure indicative of a flame flashback condition in the main burner. | 10-16-2008 |
| 20120291719 | Water Heater with Multiple Heat Exchanging Stacks - A water heater has a tank having an upper and a lower domes which are penetrated by tubular flues in a 1-1-5 arrangement of a first flue connected to a second flue which in turn is connected to tertiary condensing flues. A gas-fired burner on the upper dome fires into the first flue. Both the first and second flue have heat exchange capacity enhanced by a multiplicity of rectangular metal fins welded in a helical arrangement. Some or all of the fins in the first flue may be stainless steel, while the remaining fins may be a different material, such as mild steel. The first and second flues are arranged to remove approximately 82-89 percent of the heat generated by the burner with minimal or no formation of condensate. Approximately 5.5-9 percent of the heat generated by combustion in the burner is removed in third flues where condensation takes place. | 11-22-2012 |
| 20080264356 | WATER HEATER - To provide a water heater capable of suppressing an increase of combustion air temperature and suppressing to generate nitrogen oxide with an easy structure. In a water heater, a burner provided in a combustion chamber provided below a hot water storage chamber is an all primary air burner taking in air required for combustion, where the air is mostly primary air. Further, the burner is provided with a supporting plate in the combustion chamber at the height that a part of a burner head is protruded into a space covered by a lower mirror plate. | 10-30-2008 |
| 20090211540 | FUEL-FIRED, POWER VENTED HIGH EFFICIENCY WATER HEATER APPARATUS - A fuel-fired water heater has a draft inducer fan assembly with a housing having an inlet for receiving hot combustion gases discharged from the water heater, and an outlet for discharging the combustion gases. A normally closed damper member within the housing is openable by fluid pressure force created by operation of a draft inducer fan portion of the assembly. With the damper in its open position the fan exhausts the received combustion gases through a housing outlet. When the damper closes it prevents convective outflow through the housing outlet of flue-heated air. In alternate embodiments of the assembly the fan is operative to also draw in dilution air that cools the fan motor and the discharged combustion gases, with the assembly having an internal configuration preventing convective outflow of flue-heated air through the housing dilution air inlet during standby periods of the water heater. | 08-27-2009 |
| 20100282186 | HEAT EXCHANGER ELEMENT WITH A COMBUSTION CHAMBER FOR A LOW CO AND NOX EMISSION COMBUSTOR - The present invention provides a new heat exchanger element comprising a premix burner with an outward curved or ridged burner surface. The heat exchanger element further comprises a combustion chamber. The combustion chamber is bound on one side by the burner and is further made up of water cooled metal walls which, starting from the burner and in downstream direction, first widen and thereafter narrow down to the width of a customary heat exchanger element. This creates enough space for a proper combustion, avoiding dead angles and recirculation or too early ending of the combustion reaction, thereby reaching low emissions of NOx and CO. | 11-11-2010 |
| 20090308333 | REMOVABLE HEAT EXCHANGER FOR A GAS FIRED WATER HEATER - A water heater. The water heater includes a water tank having a tank wall defining an interior space and adapted to contain water to be heated, a tank extension having an extension wall detachably mounted to the tank wall, the extension wall defining extension space communicating with the interior space, and defining an extension axis, an air inlet at least partially in the extension space extending through the extension wall at a radial angle to extension axis of tank extension, a combustor at least partially in the extension space and in fluid communication with the air inlet, and a plurality of heat exchange tubes configured to receive products of combustion from combustor and extending into interior space of the water tank. The extension space is configured to be flooded with water from the water tank. | 12-17-2009 |
| 20080216772 | HIGH EFFICIENCY WATER HEATER - A collector assembly is provided for directing products of combustion between segments of a flue of a water heater. The assembly includes an insulator at least partially defining a chamber configured to direct products of combustion between the flue segments. The assembly also includes a cover configured to at least partially surround the insulator. The cover is also configured to be coupled to a water tank of the water heater. The insulator in an uncompressed state is dimensioned to extend outwardly from the cover when the insulator is positioned in the cover. The insulator in a compressed state is dimensioned to permit coupling of the cover to the water tank. | 09-11-2008 |
| 20090151653 | Water Heater with Condensing Flue - A water heater has a burner positioned below a vertical centrally located flue with heat exchange capacity enhanced by a multiplicity of rectangular metal fins which are welded on the inside of the vertical central flue. The central flue extends upwardly within a water tank. The central flue transitions to a smaller diameter downwardly draining helically coiled condensing flue. Approximately 80% of the heat from the combustion gases is transferred to the water within the water tank through the wall of the central flue without condensation. An additional 10% or more of the combustion heat is transferred to the water accompanied by condensation of water in the coiled flue. A fan draws the combustion gases through the central flue and the coiled condensing flue and supplies the combustion gases to an exterior vent. | 06-18-2009 |
| 20100269766 | WATER HEATER WITH ENHANCED THERMAL EFFICIENCY - A water heater with enhanced thermal efficiency includes a heat exchange tank, a water tank that houses the heat exchange tank and shields and isolates the heat exchange tank with a surrounding curtain of water flowing therethrough, a burner, and a blower. The burners is connected to a combustible gas outlet opening of the blower and extends from a central base of the heat exchange tank up into the heat exchange tank to form a combustion chamber within an internal cavity of the heat exchange tank. A plurality of radially arranged flame tubes extends downward from a top corner of the internal cavity and is enclosed by the water flowing inside the water tank. The flame tubes are extended to communicate an exhaust gas discharge tube set circumferentially of and separated from the base for discharging gas. Water inlet and outlet are respectively provided to the water tank. | 10-28-2010 |
| 20110146594 | Fire Tube Heater - A fire tube heater apparatus includes a shell, with a tube bundle received in the shell and a burner section communicated with the tube bundle. The tubes in the tube bundle have circular inlet and outlet end portions with a flattened, serpentine intermediate portion. The intermediate portion has a width greater than the inlet outside diameter and a tube thickness transverse to the width less than the inlet outside diameter. | 06-23-2011 |
| 122180310 | Penetrates one side of water chamber to another | 3 |
| 20120180737 | GAS-FIRED WATER HEATER WITH AN EXHAUST ASSEMBLY - An exhaust assembly for use with a gas-fired water heater that includes a hood for receiving exhaust gas from the gas-fired water heater, a housing, and a fan positioned in the housing to move exhaust gas from the hood out of the exhaust outlet. The hood includes a first hood mounting location and a second hood mounting location. The housing includes an exhaust outlet and a housing mounting location. In a first configuration, the exhaust outlet faces a first direction and the housing mounting location is aligned with and secured at the first hood mounting location. In a second configuration, the exhaust outlet faces a second direction different than the first direction and the housing mounting location is aligned with and secured at the second hood mounting location. | 07-19-2012 |
| 20130019816 | FUEL-FIRED WATER HEATER WITH AIR DRAFT INDUCER AND FLUE HEAT EXCHANGER - A fuel-fired water heater has a tank which holds a reserve of water to be heated by a burner located in a sealed combustion chamber disposed under a bottom heat transfer wall of the tank. A combustion gas exhaust flue extends vertically through the center of the tank in contact with the water therein. A restrictive baffle is secured inside the gas exhaust flue to retard hot gases rising in the flue from the combustion chamber whereby to increase heat transfer from the hot gases to the water in contact with the exhaust flue. A draft inducing blower is secured in a top end of the exhaust flue above the top wall of the tank. A heat exchanger is in communication with a heat exchange section of the flue above the top end of the exhaust flue to extract further heat from residual hot gases in the exhaust flue. | 01-24-2013 |
| 20110214621 | HIGH EFFICIENCY GAS-FIRED WATER HEATER - The efficiencies of illustrative embodiments of vertical center flue type fuel-fired base water heaters are improved by installing in the water heaters variously configured tubular condensing type secondary heat exchangers of smaller diameters than the associated center flues. The efficiency increases are achieved with components and manufacturing processes similar to those utilized in the base water heaters and secondary heat exchanger materials similar to those in the tank portions of the base water heaters. | 09-08-2011 |
| 122180400 | Water tube surrounded by burned fuel | 3 |
| 20130092105 | FLUE HAVING AN ADJUSTABLE FLUE GAS FLOW UNIT - Known chimneys or chimney furnaces use flue gas flow units for heating buildings, said devices having displaceable or fixed obstacles for deflecting flue gas for generating flue gas turbulence. The invention relates to a device and method for transferring heat through a flue gas discharge pipe ( | 04-18-2013 |
| 20120125269 | HEATER - A heater, comprising a fuel burner, a primary heat exchanger, and an enclosure around the fuel burner and primary heat exchanger and defining a gas flow path, wherein the enclosure further comprises a secondary heat exchanger and/or heat storage means. | 05-24-2012 |
| 20120174878 | GAS-FIRED WATER HEATER WITH AN EXHAUST ASSEMBLY - A gas-fired water heater including a storage tank, a combustion chamber, a burner for producing products of combustion, the burner positioned in the combustion chamber, a flue including a longitudinal axis, the flue extending from the combustion chamber through the storage tank, and an exhaust assembly positioned above the flue. The exhaust assembly includes a hood, a motor including a drive shaft, and a fan coupled to the drive shaft for rotation with the drive shaft about a rotational axis. The hood receives the products of combustion from the flue and directs the products of combustion at an acute angle toward the fan. The rotational axis is positioned at the acute angle relative to the longitudinal axis. | 07-12-2012 |
| 122180500 | And external water tank | 3 |
| 20120222631 | GAS-FIRED WATER HEATER WITH SEPARABLE HEAT EXCHANGER OR DETACHABLY CONNECTED EXTERNAL WATER HEATER - A hot water heater, particularly but not exclusively for domestic use, is herein described and having removably secured thereto a modular heat exchanger or an external water heater to heat the water in a separate tank portion. The two are easily separable from one another for service, repair or interchange. The air-to-air heat exchanger extracts heat loss from the central flue of a gas fired water heater to provide a source of heat for the building in which the hot water heater is installed. The external water heater is provided with a gas-fired burner for heating water from the tank circulated in a heat exchanger to transfer heat from a fluid heated by the burner and circulated in the heat exchanger to transfer the heat to water circulated from the water tank. | 09-06-2012 |
| 20100101507 | WATER HEATERS WITH FUEL LINE AND DOOR ASSEMBLY - A water heater includes a water container, a combustion chamber having an opening that may be covered by a door and located adjacent the water container, a burner associated with the combustion chamber and arranged to combust fuel to heat water in the water container, and a control valve for regulating fuel flow from an external fuel source. A fuel line extends between the control valve and the burner, the fuel line has a first substantially rigid portion connected to the control valve, a second interior portion extending from the door to the burner and a third flexible portion fixedly connected to both of the first and second portions. | 04-29-2010 |
| 20100101508 | WATER HEATERS WITH SEALED DOOR ASSEMBLY - A water heater door assembly includes a base plate sized and shaped to substantially sealingly cover an access opening in a water heater combustion chamber and has at least one opening through which a fuel supply line extends at least partly between a burner in the combustion chamber and a gas control valve, and a flexible seal positioned at least partly within the opening including an engaging portion substantially sealed to an edge portion of the opening, and a through hole that is shaped to receive the fuel supply and has a size slightly smaller than the size of an outer dimension of the fuel supply line such that the flexible seal and the fuel supply line are friction fit together to form a seal. | 04-29-2010 |
