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| Number | Title | Issue Date |
| 7900588 | Flue sensor for gas fired appliance A fuel fired appliance exhaust gas parameter sensor for continually detecting gas parameter emissions, such as CO, NOx and O2, may be located above the appliance near the appliance exhaust outlet. The sensor may be located near or under a draft hood locat... | 03/08/2011 |
| 7647895 | Systems and methods for controlling a water heater A control for a water heater is provided that comprises a pressure switch for sensing a predetermined level of airflow sufficient for maintaining proper burner operation, and a temperature sensing means for sensing the temperature of the water in the tank. The contr... | 01/19/2010 |
| 7607408 | Water heater burner clogging detection and shutdown system A fuel-fired water heater has main and pilot burners disposed in its combustion chamber. Illustratively, all of the primary combustion air utilized by the main and pilot burners during firing thereof is supplied thereto via an enclosed path extending to the burners ... | 10/27/2009 |
| 7451725 | Water heater combustion chamber sensing system A combustion chamber is disposed below the water container of a water heater and formed at least partially by a shell. A burner disposed within the combustion chamber and a fuel supply line is connected to the burner. A valve associated with the fuel supply line. A ... | 11/18/2008 |
| 7438023 | Heating device having a thermal cut-off circuit for a fuel line and method of operating the same A thermal cut-off circuit for a gas-fired device and method of operating the circuit. The thermal cut-off circuit includes a thermal cut-off switch and an ambient thermal switch. The thermal cut-off switch is positioned in a combustion chamber and the ambient therma... | 10/21/2008 |
| 7319577 | Safety shut off for water heaters A water heater includes a gas valve and a solenoid to operate the gas valve. A thermocouple of the water heater is heated by a pilot light to provide a current source to maintain the gas valve in an open position. A sensor activated switch switches current from a se... | 01/15/2008 |
| 7290502 | System and methods for controlling a water heater A control for a water heater is provided that comprises a pressure switch for sensing a predetermined level of airflow sufficient for maintaining proper burner operation, and a temperature sensing means for sensing the temperature of the water in the tank. The contr... | 11/06/2007 |
| 7275504 | Water heater The water includes a tank 10 which includes dual cold water inlets 21a, 21b. One or other of the cold water inlets 21a, 21b is in use connected to a cold water supply line. The cold water inlets 21 | 10/02/2007 |
| 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 products generated by the burner; an intake conduit sealingly connected to... | 01/09/2007 |
| 7083408 | Apparatus and method for shutting down a fuel fired appliance An apparatus comprising a switch, a fuse, and a sensor that is capable of detecting the presence of flammable vapors and responsively changing in resistance, wherein the sensor enables the switch to supply current to the fuse which opens to shut down an appliance bu... | 08/01/2006 |
| 7051683 | Gas heating device control A method, and a system using the method, of controlling a heating device. The method includes combusting a mixture of fuel and air in a sealed combustion chamber thereby forming a reaction zone in which the fuel reacts with the air, and also forming outside of the r... | 05/30/2006 |
| 7032542 | Apparatus and methods for controlling a water heater A gas-powered water heater includes means for stepping down a line voltage from a receptacle remote from the tank, means for using the stepped down voltage to provide a low voltage, and means for using the low voltage to sense conditions pertaining to the heater and... | 04/25/2006 |
| 7032543 | Water heater with pressurized combustion A water heater includes a sealed combustion chamber and one or more fans for raising pressure in the combustion chamber to increase efficiency of the water heater. The pressure permits a more restrictive baffle to be used in the flue compared to baffles used in atmo... | 04/25/2006 |
| 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 |
| 6973819 | Differential compensated vapor sensor Vapor sensing systems and methods are disclosed. An appliance such as a gas water heater, clothes dryer, and the like can be associated with a controller for controlling the appliance. A vapor sensor is also associated with the appliance, such that the vapor sensor ... | 12/13/2005 |
| 6964248 | Fuel-fired heating appliance with temperature-based fuel shutoff system A gas-fired water heater is provided with a combustion shutoff system which precludes further combustion within the water heater's combustion chamber in response to a combustion temperature therein reaching a predetermined level correlated to and indicative of a pre... | 11/15/2005 |
| 6957628 | Fuel-fired heating appliance with temperature-based fuel shutoff system A gas-fired water heater is provided with a combustion shutoff system which precludes further combustion within the water heater's combustion chamber in response to a combustion temperature therein reaching a predetermined level correlated to and indicative of a pre... | 10/25/2005 |
| 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 |
| 6925968 | Portable high pressure steam generator for car washing with gas heater A portable steam generator for automobile washing is provided. The steam generator of the current application is to produce a steam of pressure 6 KG/cm2 at a rate of 30 kg/hr. The steam generator uses natural gas as a heat source. The inner structure of t... | 08/09/2005 |
| 6908300 | Apparatus and method for shutting down a fuel fired appliance An apparatus comprising a switch, a fuse, and a sensor that is capable of detecting the presence of flammable vapors and responsively changing in resistance, wherein the sensor enables the switch to supply current to the fuse which opens to shut down an appliance bu... | 06/21/2005 |
| 6901886 | Secondary burner for sealed combustion chamber of a gas-fired hot water heater A secondary burner is provided in a sealed combustion chamber of a gas-fired hot water heater. The hot water heater has a support base for supporting it elevated from a floor surface. The sealed combustion chamber is supported over the base under an inner casing of ... | 06/07/2005 |
| 6854428 | Water heater with normally closed air inlet damper A fuel-fired, power vented water heater has a combustion chamber with an outer wall portion defined by an arrestor plate in which flame quenching air inlet openings are formed. All combustion air entering the combustion chamber must first pass through an air inlet p... | 02/15/2005 |
| 6807925 | Explosion-proof hot water heater with unsealed fuel combustion chamber An explosion-proof hot water heater of the type having a gas-fired combustion chamber at a lower end of the inner tank is described. The combustion chamber is an unsealed chamber and has a sealed bottom wall and a fuel burner in the combustion chamber. Combustion ai... | 10/26/2004 |
| 6766771 | Fuel-fired water heater with dual function combustion cutoff switch in its draft structure A fuel-fired power vented heating appliance, representatively a water heater, has, in its draft structure, a single thermal or other type of cutoff switch which serves the dual function of preventing (1) the creation of an unacceptably high level of carbon monoxide ... | 07/27/2004 |
| 6766835 | Tank monitor system A hot water tank monitoring system is designed to shut off the water supply to the hot water tank and to shut off either the electrical supply or the gas supply to the heating unit of the hot water tank in response to sensing of malfunction of one or more of a numbe... | 07/27/2004 |
| 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 |
| 6666174 | Elevating base for gas-fired water heater A base for rendering a gas-fired water heater, having a lower combustion chamber, explosion-proof, is described. The base has elevating supports which are provided with securement means in an upper portion thereof for securing same to a bottom end of a ga... | 12/23/2003 |
| 6662757 | Explosion proof gas-fired water heater An explosion proof gas-tired water heater is comprised of a housing having a water reservoir provided with a sealed combustion chamber thereunder. A flue pipe is disposed above the combustion chamber and extends through the reservoir. A gas burner and pil... | 12/16/2003 |
| 6634320 | Flame atmosphere analyzer and a water-heating device including the analyzer A flame atmosphere analyzer is described and comprises a tube, in which an air-gas intake and mixing chamber is defined, a gas-supply nozzle, and primary combustion-air supply means opening into the intake chamber, as well as a flame burner comprising at ... | 10/21/2003 |
| 6606968 | Water heater unit There is provided a water heater unit realizing antifreezing of a water tube and the like of a heat exchanger without providing a backwind stopper on an exhaust tube. The water heater unit comprises a heat exchanger for heating water by a combustion heat ... | 08/19/2003 |
| 6561138 | Water heater with a flame arrester A water heater is arranged with the hot water storage chamber R1 at the top and the combustion chamber R2 at the bottom within the body 11 which is a container. The combustion chamber R2 is equipped with the air supply inlet 13a, and the flame arrester 27... | 05/13/2003 |
| 6540504 | Combustion appliance with flame blocking device A main burner 22, a pilot burner 25, and a lead-in pipe 29 supplying combustion exhaust to the pilot burner 25 are arranged in a combustion chamber R2. A flame arrester 27 with small holes 27a is provided at a bottom plate 13. Furthermore, a primary therm... | 04/01/2003 |
| 6418882 | Power vented, fuel fired water heater with soft ignition system A power vented, gas fired water heater has a main gas burner disposed within a combustion chamber partially bounded by an arrestor plate having a spaced series of flame quenching combustion air inlet openings therein. To provide for a "soft" ignition of e... | 07/16/2002 |
| 6412447 | Fuel-fired water heater with flammable vapor sensor and associated induced flow tube Fuel fired power vented and natural draft type water heaters are provided with flammable vapor sensors operative to detect flammable vapors exteriorly adjacent the water heater and responsively preclude fuel flow to the burner portion of the water heater.... | 07/02/2002 |
| 6390028 | Fuel-fired liquid heating appliance with burner shut-off system A fuel-fired heating appliance, representatively a gas-fired water heater, has a combustion chamber in a lower end portion thereof, and fuel burner apparatus having main and pilot burner portions is operatively disposed in the combustion chamber. During o... | 05/21/2002 |
| 6302062 | Sealed access assembly for water heaters A water heater including a water container; a combustion chamber containing a main burner and a pilot burner positioned to heat water in the water container and having a side wall; a main burner fuel supply line adapted to connect between a fuel control v... | 10/16/2001 |
| 6269779 | Sealed access assembly for water heaters A water heater including a water container; a combustion chamber containing a main burner and a pilot burner positioned to heat water in the water container and having a side wall; a main burner fuel supply line adapted to connect between a fuel control v... | 08/07/2001 |
| 6053130 | Power vent water heater with electronic control system A water heater of the invention includes a water container; a combustion chamber adjacent the water container; a burner associated with the combustion chamber; a flue connected to the combustion chamber; a blower assembly positioned to receive combustion ... | 04/25/2000 |
| 6003477 | Ignition inhibiting gas water heater A water heater including a water container; a combustion chamber located adjacent the container, the combustion chamber having a floor portion with an opening; a conduit extending upwardly from and being substantially sealed to the opening; a burner locat... | 12/21/1999 |
| 5797355 | Ignition inhibiting gas water heater 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 fumes to enter the enclosure without igniting flammable gases... | 08/25/1998 |
