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| Number | Title | Issue Date |
| 7392766 | Temperature and pressure relief apparatus for water heater A liquid heating appliance, representatively a water heater, is provided with protective apparatus for preventing rupture of its liquid storage tank portion caused by overheating of pressurized liquid therein. Illustratively, the protective apparatus includes a leng... | 07/01/2008 |
| 7387089 | Water heater with cross-sectionally elongated raw fuel jet pilot orifice A radiant gas burner within the combustion chamber of a water heater has a pilot flame created using a cross-sectionally elongated raw fuel jet that impinges on an interior surface portion of a flame holding outer burner wall portion, representatively of a metal wir... | 06/17/2008 |
| 7380523 | Control for a fuel-fired water heating appliance having variable heating rates A control system for a fuel-fired water heater appliance is provided that includes a control for the appliance that is in communicating with a sensor for sensing a water flow rate through the water heater. The control system is capable of controlling a gas valve to ... | 06/03/2008 |
| 7370648 | Water heater system A housing has a top, a bottom and side walls. A liner has a top, a bottom, and side walls. The liner is fabricated of glass. A space is provided between the liner and housing. Insulation material is provided throughout the space. A heating assembly is provided withi... | 05/13/2008 |
| 7341448 | Gas-fired heating apparatus The gas-fired heating apparatus, especially a water heater, has a combustion chamber (2a); an atmospheric gas burner (5) within the combustion chamber (2a); a combustion gas/air supply system (18) having an intake device ( | 03/11/2008 |
| 7337517 | Method of manufacturing a combustion chamber for a water heater A method of manufacturing a combustion chamber for use in a water heater is provided. A skirt is formed, and an edge portion of a plate is spot welded to the skirt. The edge portion of the plate is circumferentially welded to the skirt, thereby forming a seal betwee... | 03/04/2008 |
| 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 |
| 7270087 | Heat trap A heat trap assembly for providing a thermal dam within piping associated with water heaters is disclosed. The heat trap includes an elongated housing, a fin and a flap member. The housing includes first and second ends, and an interior opening extending therethroug... | 09/18/2007 |
| 7261061 | Water heater with lint collection detection A low NOx water heater including a water container; a combustion chamber adjacent the water container; and a burner associated with the combustion chamber and arranged to combust fuel to heat water in the water container, the burner comprising a plenum ch... | 08/28/2007 |
| 7242310 | Control techniques for shut-off sensors in fuel-fired heating appliances In a flammable vapor sensor-based shut-off system of a fuel-fired water heater the sensor resistance output signal degradation caused by aging of the sensor is automatically compensated for using an operational timer having an output signal indicative of the total l... | 07/10/2007 |
| 7222591 | Ducted secondary air fuel-fired water heater LDO detection A radiant burner within the combustion chamber of a fuel-fired water heater is supplied with primary and secondary combustion air from outside the combustion chamber. A flame-holding mesh section of the burner is protected from becoming unacceptably clogged by parti... | 05/29/2007 |
| 7198059 | Apparatus and system for retrofitting water control valves A water control fixture having an operating valve and a thermostatically controlled bypass valve disposed in the fixture for bypassing water away from the fixture until the water temperature reaches a desired level. When pressurized water from the hot water heater r... | 04/03/2007 |
| 7162980 | Water heater burner clogging detection and shutdown system A fuel-fired water heater has main and pilot burners disposed in its combustion chamber. 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 from outside of ... | 01/16/2007 |
| 7093565 | Heat trap A heat trap assembly for a hot water tank includes a heat trap insert and a sealing member retained by the heat trap insert. The heat trap insert includes a seat having an opening that is dimensioned to be covered by the sealing member when no water is flowing throu... | 08/22/2006 |
| 7066201 | Valve device having solid engaging structure A valve device includes a housing including a peripheral valve seat extended into a chamber, to separate the chamber into two separated spaces. A valve member includes an outer peripheral groove to receive a sealing ring for engaging with the peripheral valve seat o... | 06/27/2006 |
| 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 |
| 7028642 | Water heater having raw fuel jet pilot and associated burner clogging detection apparatus A radiant gas burner within the combustion chamber of a water heater has a pilot flame created using a raw fuel jet that impinges on an interior surface portion of a flame holding outer burner wall portion, representatively of a metal wire mesh material, and is mixe... | 04/18/2006 |
| 7000626 | Instantaneous and constant fluid delivery system This is a method and means for maintaining a constant supply of a fluid with specific characteristics within a fluid supply conduit from a supply source of the fluid with specific characteristics at a point of service of the fluid with specific characteristics in wh... | 02/21/2006 |
| 6994056 | Water heater having a low NOx burner integrated with FVIR platform Various embodiments of fuel-fired low NOx water heaters are provided with burners having built-in venturi inlet sections for receiving fuel from a source thereof and combustion air from outside of the water heater. The burners are integrated in various manners with ... | 02/07/2006 |
| 6978496 | Portable water heater A portable hot water heater for use during camping, boating, hunting, hiking, fishing, backpacking, etc. The hot water heater advantageously efficiently and rapidly heats large quantities of water for hot showers, cooking and cleaning. The hot water heater includes ... | 12/27/2005 |
| 6959724 | Multiple regulator vacuum delivery valve assembly This invention is directed to an apparatus for controlling the discharge of pressurized fluids from the outlet of a pressurized vessel, and particularly directed to multiple fluid regulating devices within the vessel for storing and controlling the flow of fluid or ... | 11/01/2005 |
| 6957831 | Nipple for hot water tank conduits A nipple for connection to an outer metal casing of a host water heater for coupling a water conduit to an inner casing of the hot water heater is described. The nipple is a hollow tube having opposed threaded end portions. A thermally insulating sleeve is provided ... | 10/25/2005 |
| 6945196 | Gas-fired water heater The water heater has an upright water tank (1), an exhaust flue (3) extending through the water tank, a combustion chamber (2) arranged under the water tank, an atmospheric gas burner (5) in the combustion chamber and a complete pre-mixin... | 09/20/2005 |
| 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 |
| 6877461 | 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... | 04/12/2005 |
| 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 |
| 6851395 | Heat trap with non-rotating sealing member A heat trap assembly for a hot water tank includes a housing and a sealing member disposed in the housing. The sealing member includes a first portion that is adapted to restrict rotational movement of the sealing member in at least two perpendicular axes. The seali... | 02/08/2005 |
| 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 |
| 6745723 | Water heater heat trap apparatus Convective heat traps are installed at the cold water inlet and hot water outlet of a water heater. Each heat trap has a tubular body with two axially spaced apart resilient flapper members transversely extending across the interior of the body and being hinged on o... | 06/08/2004 |
| 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 them from flammable vapors in the immediate vicinity. The c... | 03/02/2004 |
| 6648235 | Control method of thermostatic system A control method of a thermostatic system for a hot water heater is provided where when the water temperature in the hot water heater is too large, a first electromagnetic valve is controlled to be open and a second electromagnetic valve is controlled to ... | 11/18/2003 |
| 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 |
| 6553946 | Multi-function water heater control device A single control device is operational to control the flow of gas to a water heater as well as to protect against excessive temperature and pressure. The control device requires only a single fitting to be attached to the water heater tank to expedite the... | 04/29/2003 |
| 6543474 | Pressure equalizing check valve A flapper-type anti-siphoning check valve for a domestic water system has an auxiliary valve built into the flapper. The auxiliary valve permits slow reverse flow of water through the check valve when the flapper is closed to prevent build-up of pressure ... | 04/08/2003 |
| 6532906 | Inlet heat recovery module for water heater A water heater includes a storage tank communicating with a cold water supply pipe and a hot water supply pipe for the respective supply of cold water to, and removal of hot water from, the tank. The water heater also includes an insulated heat recovery m... | 03/18/2003 |
| 6508207 | 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 at least one air inlet to admit air and extraneous fumes into the combustion chamber and confine ignition and combustion of the extraneo... | 01/21/2003 |
| 6443103 | 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 at least one flame arrestor to admit air and extraneous fumes into the combustion chamber and confine ignition and combustion of the ext... | 09/03/2002 |
| 6422178 | Fuel-fired heating appliance with louvered combustion chamber flame arrestor plate A fuel-fired heating appliance, representatively a gas-fired water heater, has a combustion chamber with an outer wall portion defined by a perforated flame arrestor plate having specially configured louvered combustion air intake openings through which c... | 07/23/2002 |
| 6418883 | 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... | 07/16/2002 |
