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| Number | Title | Issue Date |
| 7997236 | Water heater and a method of operating same A water heater (10) including a tank (12) adapted for mounting with its longitudinal axis substantially vertical and a duct (32) adapted for mounting with its longitudinal axis substantially vertical. The duct (32) is positioned within th... | 08/16/2011 |
| 7814868 | 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 o... | 10/19/2010 |
| 7603967 | Water heater with flammable vapor sensor A water heater including a water container, a combustion chamber adjacent the water container, a burner associated with the combustion chamber, a blower located to receive combustion products generated by the burner, an intake air conduit connected to the combustion... | 10/20/2009 |
| 7559293 | High efficiency water heater A flue system is provided for a water heater having improved heat exchange efficiency. The flue system includes an upstream heat exchange portion having at least one substantially vertical flue tube. The flue system also includes a downstream heat exchange portion h... | 07/14/2009 |
| 7441558 | Active thermal energy storage system An active thermal energy storage system is disclosed which uses an energy storage material that is stable at atmospheric pressure and temperature and has a melting point higher than 32 degrees F. This energy storage material is held within a storage tank and used as... | 10/28/2008 |
| 7431568 | Draft inducer having a backward curved impeller A draft inducer is disclosed. The draft inducer includes an impeller having one or more backward curved blades. The impeller is coupled to a motor which is preferably a DC motor. The DC motor resides at the center of the impeller and is housed within the impeller st... | 10/07/2008 |
| 7421784 | Method of manufacturing a water heater with a leak detection system An original equipment manufacturer water heater including a water tank including an inlet and an outlet, means for heating water in the water tank, a base pan at least partially supporting the water tank such that water leaked from the water tank collects in the bas... | 09/09/2008 |
| 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 |
| 7387721 | Apparatus and system for removing scale causing chemicals in hot water systems Hot water pipes, in areas with hard water, tend to fill with scale until they no longer pass enough water. De-scaling water pipes with acid is dangerous, expensive and damages the pipes. Ion exchange and reverse osmosis water softeners eliminate scale buildup in pip... | 06/17/2008 |
| RE40307 | Inlet baffle for water heater A baffle for slowing the incoming water flow into a booster heating tank so that the turbulence in the water tank is minimized. The baffle consists of an inner cap and outer cap which are positioned over the inlet to a water heating tank. The outer cap is spaced apa... | 05/13/2008 |
| 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 |
| 7363882 | Condensation removal for use with a draft inducer A condensation removal apparatus is disclosed. The condensation removal apparatus is used with a hot water heater wherein the hot water heater produces a fuel exhaust. The fuel exhaust from the hot water heater is provided to a draft inducer through an inlet which i... | 04/29/2008 |
| 7360535 | Hot water apparatus A hot water apparatus is provided in which heat recovery is performed as much as possible allowing condensate to be generated and excellent heat efficiency is achieved without providing a plurality of heat exchangers by effectively evaporating generated condensate. ... | 04/22/2008 |
| 7360506 | Low CO water heater A water heater including a water container, a combustion chamber adjacent the water heater, a burner associated with the combustion chamber and arranged to combust fuel to heat water in the water container, a flue having an upper portion and a lower portion operativ... | 04/22/2008 |
| 7346274 | Water heater and method of controlling the same A water heater including a water inlet line having an inlet opening that introduces cold water to a tank, a water outlet line having an outlet opening that withdraws heated water from the tank, and a heating element. The water heater further includes a control circu... | 03/18/2008 |
| 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 |
| 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 |
| 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 |
| 7311064 | Gas water heater damper/baffle Apparatus for improving the efficiency of a water heater includes a combination damper assembly and heat transfer baffle. The damper assembly includes a plurality of movable damper with each damper leaning outwardly from one another when the dampers are in a closed ... | 12/25/2007 |
| 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 exterior mounted flue assembly. The closed tank is enclosed by a rot... | 11/27/2007 |
| 7299768 | Gas-fired water heating apparatus The water heating apparatus has an upright cylindrical thermally insulated storage tank, an axially extending exhaust gas pipe passing centrally through the storage tank and a combustion chamber under the storage tank. An atmospheric gas burner, which has a complete... | 11/27/2007 |
| 7279137 | Burners and combustion apparatus for carbon nanomaterial production The invention provides improved burners, combustion apparatus, and methods for carbon nanomaterial production. The burners of the invention provide sooting flames of fuel and oxidizing gases. The condensable products of combustion produced by the burners of this inv... | 10/09/2007 |
| 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 |
| 7258080 | Fuel-fired dual tank water heater having dual pass condensing type heat exchanger A fuel-fired commercial water heater has upper and lower communicated tank portions which are separated by a plenum forming a vertically intermediate portion of a dual pass condensing type heat exchanger. A lower portion of the heat exchanger is defined by a series ... | 08/21/2007 |
| 7255208 | Aircraft brake wheel heat shield A perforated heat shield (20) is formed of a single layer and is implemented to be positioned between an aircraft brake assembly (34) and wheel assembly (28) in order to effectively protect the wheel assembly (28) and adjacent components ... | 08/14/2007 |
| 7241137 | Flame arrestor A flame arrestor for a flowing explosive gas (4), having a flame barrier (10, 20, 30) with a large number of defined passage gaps (17, 18), whose gap cross section is set with regard to the properties of the flowing gas (4), is cooled eff... | 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 |
| 7182574 | Draft inducer blower with fastener retention A draft inducer blower for high efficiency furnaces, including a blower housing having a housing body and housing cover. The housing body includes a plurality of mounting lugs spaced around its outer periphery, through which fasteners are inserted to secure the blow... | 02/27/2007 |
| 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 |
| 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 |
| 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 |
| 6976712 | Corrosion-resistant coupling means and methods for using same A coupling couples pipes of pipe fixes, especially polytetrafluoroethylene pipes. Methods for using the coupling are also provided. ... | 12/20/2005 |
| 6976501 | Appliance surround structure and method of installation An improved surround structure and method of installation for surrounding the base of a water-containing appliance to prevent water leakage onto a concrete floor is disclosed where a lower portion of the surround structure is embedded in the concrete floor as it is ... | 12/20/2005 |
| 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 |
| 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 |
| 6945197 | Water heater A water heater which includes a heat exchanger having a first passage and a second passage connected with the first passage, a gas burner mounted within the first passage, a push blower having an outlet conmected with the gas burner for forcing air into the gas burn... | 09/20/2005 |
| 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 |
| 6935038 | Gap gauge An apparatus and method for preventing damage to a chamber wall by a baffle plate in a semiconductor fabrication system during a semiconductor fabrication operation is disclosed herein. An electrostatic chuck is associated with the semiconductor fabrication system. ... | 08/30/2005 |
| 6923148 | Combustion chamber with high temperature protective coating A combustion chamber for a gas-fired hot water heater comprises a top wall which is defined by a bottom wall of an inner tank. A flue extends through the inner tank bottom wall. A circumferential skirt is disposed about the combustion chamber. The combustion chamber... | 08/02/2005 |
| 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 |
