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| Number | Title | Issue Date |
| 7992527 | Water feed controller for a boiler A water feed controller which can provide for the addition of a preset fixed amount of water to be added after a low water condition is removed. This system provides for a preset fixed amount of water to be added to a boiler above the amount which triggers the low w... | 08/09/2011 |
| 7424896 | Automatic flow shut-off system An automatic system which includes a tripper unit for actuating a device (e.g. valve-closing actuator) upon contact with water. Basically, the tripper unit is comprised of a housing having a cartridge therein which, in turn, is wrapped with an adsorbent paper which ... | 09/16/2008 |
| 7353140 | Methods for monitoring and controlling boiler flames The current invention provides a method and apparatus, which uses symbol sequence techniques, temporal irreversibility, and/or cluster analysis to monitor the operating state of individual burner flames on a appropriate time scale. Both the method and apparatus of t... | 04/01/2008 |
| 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 |
| 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 |
| 7290412 | Washing machine A washing machine in which steam and hot water are supplied to heat wash water. The washing machine includes a water tub for containing wash water, a steam generating unit for heating water supplied thereto, thereby generating steam, a water supply unit for supplyin... | 11/06/2007 |
| 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 |
| 7253741 | Automated system to monitor multiple sources of water leaks in residential and commercial buildings An electronic monitoring system is provided to monitor for and sense water leakage at multiple locations and sources within a commercial or residential property. These sources are hot water heaters, hot water boilers, air conditioning system evaporators, washing mac... | 08/07/2007 |
| 7249573 | Pressurized steam boilers and their control A method of controlling the operation of a pressurised steam boiler (50) heated by a burner (20), which includes the steps of a) monitoring the level of water in the boiler (50), b) monitoring the pressure of steam in the boiler (50), c) ... | 07/31/2007 |
| 7210536 | Flame arrester A highly efficient flame arrester adapted for use in preventing an external flame from backflashing upstream in a pipe, or a conduit, or a stream carrying a flammable substance. The flame arrester comprises a contained layer of nested ellipsoids formed from expanded... | 05/01/2007 |
| 7152690 | Flame arrester A highly efficient flame arrester adapted for use in preventing an external flame from backflashing upstream in a pipe, or a conduit, or a stream carrying a flammable substance. The flame arrester comprises a contained layer of nested ellipsoids formed from expanded... | 12/26/2006 |
| 7151459 | Wastewater fluid level sensing and control system A wastewater fluid level sensing and control system is provided. The system comprises a control panel, a reservoir, at least one pump and a fluid level sensing device. The control panel comprises a housing and user interface input and output devices for use with con... | 12/19/2006 |
| 7117825 | System and method for preventing overheating of water within a water heater tank A water heating system has a tank, a first heating element, a first temperature sensor, and a controller. The first heating element is mounted on the tank, and the controller is electrically coupled to the first temperature sensor. The controller is configured to de... | 10/10/2006 |
| 7112059 | Apparatus and method for shutting down fuel fired appliance An apparatus is provided for controlling the operation of a gas fired appliance having a gas valve circuit for enabling the flow of gas to the burner. The apparatus comprises a sensor capable of detecting the presence of flammable vapor, a switching means in series ... | 09/26/2006 |
| 7093611 | Water feeder controller for boiler A water feeder controller for a boiler monitors a low water cutoff sensor in a boiler and uses a feed timer to feed water to the boiler for a predetermined feed period of time. The feed timer brings the water level in the boiler well above the low water cutoff senso... | 08/22/2006 |
| 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 |
| 7044023 | Knob with different gear ratios A knob adjustment device particularly for adjusting the temperature in valve units for water-heating apparatus. The device comprises a geared transmission interposed between the knob and an operating member of the valve unit in order to transmit a rotary movement to... | 05/16/2006 |
| 6997207 | Water-heater pan A water-heater pan includes a bottom wall for receiving the bottom of a water heater. The bottom wall defines a relatively narrow, arcuate flow receptacle extending continuously outwardly from a portion of the perimeter of the bottom wall. The flow receptacle define... | 02/14/2006 |
| 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 |
| 6986326 | Additional security for a steam boiler A steam generation apparatus is set forth including a housing; a boiler adapted to generate steam within the housing; a filler cap adapted to be removably coupled to the boiler; a first pressure relief device coupled to the boiler adapted to release steam at a first... | 01/17/2006 |
| 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 |
| 6932028 | Apparatus and method for determining a liquid level in a steam drum An apparatus for determining a density-compensated liquid level in a vessel containing a mixture of liquid and vapors comprises a temperature sensor which produces a signal that is proportional to the temperature of the mixture; and a processing apparatus that inclu... | 08/23/2005 |
| 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 |
| 6920844 | Thermal expansion arrester for water heaters A thermal expansion arrester for positioning within the tank of a water heater comprises a rigid tube maintaining a compressible volume of gas between first and second closure members wherein at least one of the closure members comprises a piston that is slidably an... | 07/26/2005 |
| 6916173 | Method and apparatus for operating gaseous fuel fired heater An apparatus for combusting a fuel and air mixture within a combustion chamber, particularly a combustion chamber of a gaseous fuel fired water heater. A pressure relief void is intentionally formed so that a combustion chamber forms communication with a surrounding... | 07/12/2005 |
| 6909816 | Sensing system for detection and control of deposition on pendant tubes in recovery and power boilers A system for detection and control of deposition on pendant tubes in recovery and power boilers includes one or more deposit monitoring sensors operating in infrared regions and about 4 or 8.7 microns and directly producing images of the interior of the boiler. An i... | 06/21/2005 |
| 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 |
| 6899122 | Safety shutoff apparatus and method Safety shutoff apparatus can close a valve using a pressure operable device coupled to and acting upon the valve. The proximal end of a pressure line is coupled to the pressure operable device for applying fluid pressure thereto in order to operate the pressure oper... | 05/31/2005 |
| 6895902 | 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... | 05/24/2005 |
| 6895990 | Water heater fail safe apparatus Apparatus for automatically shutting off the water supply to a leaking water heater includes a water collecting tray positionable beneath the heater, a valve mechanism attachable to the tray, a float mechanism, and an action arm interactive between the float mechani... | 05/24/2005 |
| 6893253 | 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... | 05/17/2005 |
| 6877462 | Sensorless flammable vapor protection and method A water heater control system that prevents the accumulation and accidental ignition of dangerous quantities of unwanted flammable vapors. The system intermittently generates a spark at a predetermined interval such that if unwanted flammable vapors are present, the... | 04/12/2005 |
| 6814031 | Combustion air shutoff apparatus for a fuel-fired heating appliance A gas-fired water heater has a combustion chamber with a bottom wall defined by a perforated flame arrestor plate forming a portion of a flow path through which combustion air may be supplied to a burner structure within the combustion chamber. During firing of the ... | 11/09/2004 |
| 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 |
| 6792967 | Shutoff valve system with leak detector A latched, spring loaded valve having a water sensor and an activation mechanism shuts off water supply, when a water leak is detected, to specific application as cloths washing machines, dishwashing machines, sinks, toilets, and refrigerators equipped with ice make... | 09/21/2004 |
| 6776125 | Methods of operating a fuel-fired heating apparatus A gas-fired water heater has a combustion chamber with a bottom wall defined by a perforated flame arrestor plate forming a portion of a flow path through which combustion air may be supplied to a burner structure within the combustion chamber. During firing of the ... | 08/17/2004 |
| 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 |
| 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 |
