Bizarre Patents
An aircraft having vertical takeoff and landing capability provided with at least first and second laterally extending paddle wheels rotatable on a central axis perpendicular to the longitudinal axis of the aircraft fuselage and between its nose and tail.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7900589 | 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 as... | 03/08/2011 |
| 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 |
| 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 |
| 7204688 | Gas burner for dryer Gas burner for a dryer including a gas nozzle for receiving, and injecting gas, a mixing tube for mixing the gas injected from the gas nozzle and primary air, igniter fitted to an outlet of the mixing tube for igniting the gas mixed with the primary air coming out o... | 04/17/2007 |
| 7175757 | Treatment liquid supply system In a treatment liquid supply system that supplies treatment liquid used for coating industrial objects for film formation including a semiconductor substrate, a display substrate, a glass and the like, a nozzle connected to a treatment liquid tank vacuum-sucks and i... | 02/13/2007 |
| 7052271 | Draft inducer system A draft inducer system has a voltage reducer capable of converting an input AC voltage to a reduced voltage, and an inducer unit capable of being coupled with the voltage reducer. The voltage reducer includes a reducer housing, a set of prongs extending from the red... | 05/30/2006 |
| 7029272 | Premix burner and method for operation thereof The invention relates to a pre-mix burner with a main burner and a pilot burner, for stabilization of the main burner. The pilot burner comprises a fine-pored burner material, which permits a combustion with low nitrogen oxide content, which is not susceptible to co... | 04/18/2006 |
| 7000572 | Telescopic baffle for water heater Water heater apparatus for improving the efficiency of a water heater having a tank, a burner, and a flue with the flue being disposed within the tank for evacuation of burn gases therethrough includes an enhancing heat transfer baffle with the baffle having a trunc... | 02/21/2006 |
| 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 |
| 6935280 | Cold water inlet for reducing accumulation of scale A cold water inlet for a tank of a water heater is provided. The inlet includes an inlet conduit configured to extend toward a flue extending upwardly through the tank. The inlet conduit includes a proximal, intermediate, and distal conduit portion, the distal porti... | 08/30/2005 |
| 6868805 | Horizontally oriented combustion apparatus A combustion chamber for a chiller includes a burner and igniter which are maintained in the horizontal position. The horizontal positioning is implemented by a steel casting, which includes a thick flange portion. The thick flange portion is between the combustion ... | 03/22/2005 |
| 6725811 | Water heater with low NOx fiber matrix burner A water heater having improved operating characteristics and lower costs of manufacturing is described. The water heater has an unified combustion chamber and burner construction with a ceramic fiber matrix burner. ... | 04/27/2004 |
| 6698385 | Combustion chamber shield for hot water heaters A shield for a combustion chamber of a hot water heater is described. The combustion chamber is a sealed or not combustion chamber and the metal heat shield encircles and is spaced about the burner and pilot which is located in the combustion chamber. The... | 03/02/2004 |
| 6622660 | Blower mixing tee An exhaust system for withdrawing a supply of exhaust gases from an exhaust flue of a heater and expelling the exhaust gases to atmosphere at a remote location that includes a mixing tee for mixing a flow of dilution air and a flow of exhaust gases. The m... | 09/23/2003 |
| 6622661 | Fuel-fired heating appliance with dilution air/flammable vapor bypass tube and elevated combustion air inlet A fuel-fired heating apparatus, representatively a forced draft or natural draft gas-fired water heater having a combustion chamber, is provided with a flammable vapor control system that functions, during firing of the apparatus, to substantially prevent... | 09/23/2003 |
| 6584940 | Flue pipe control An improved flue pipe construction particularly adapted for a fuel fired water heater is disclosed which serves to reduce or minimize heat loss when the water heater is in a standby mode. The flue pipe construction comprises inner and outer concentric flu... | 07/01/2003 |
| 6553948 | Water heater In a water heater, an outer casing includes a hollow flue tube that extends vertically from an inner periphery of a bottom wall thereof, and an outer surrounding wall that extends uprightly from an outer periphery of the bottom wall and that cooperates wi... | 04/29/2003 |
| 6435140 | Gas-fired heaters with burners having a substantially sealed combustion chamber A gas-fired combustion apparatus includes a burner disposed in a substantially sealed combustion chamber and a permeable flexible member arranged to suppress pressure fluctuations within the combustion chamber while concurrently providing for intake of co... | 08/20/2002 |
| 6422179 | Water heater flue system A water heater includes a water tank, a combustion chamber below the tank and communicating with the flue tube, and a flue system. The flue system includes a flue tube, and V-shaped fins that are metallurgically bonded to the flue tube wall to divide the ... | 07/23/2002 |
| 6418884 | Fuel-fired heating appliance having flame arrestor plate with associated scale deflector shield A fuel-fired heating appliance, representatively a gas-fired water heater, has a combustion chamber with a flame arrestor plate forming a bottom wall thereof. The arrestor plate has a spaced series of flame quenching perforations therein through which com... | 07/16/2002 |
| 6360699 | Device for heating fluid Device for heating fluid, comprising: a first section for heating the fluid in which fuel and air are mixed and combusted; a second section for heating the fluid which is disposed substantially in the line of the combustion section and in which a number o... | 03/26/2002 |
| 6354248 | Heat exchange element for a water heater flue The present invention relates to heat exchange elements and heat exchange assemblies and water heaters containing such heat exchange elements. The inventive heat exchange elements include an elongated support member or spine, from which extends either a s... | 03/12/2002 |
| 6334411 | High efficiency, glass-lined, combination space and hot water heater A combination space and hot water heater is comprised of an inner tank having an outer casing spaced therebout with insulation being interposed between the casing and the inner tank. The inner tank has a glass-lined inner surface and a heater is provided ... | 01/01/2002 |
| 6311646 | Hot water heater A hot water heater having a housing with a top chamber, a bottom chamber and a main tank. A cold water inlet pipe runs into the top chamber and extends into the tank. The cold water inlet pipe coils inward, beginning at circumference of the top chamber be... | 11/06/2001 |
| 6286465 | Water heater flue system A water heater includes a water tank, a combustion chamber below the tank and communicating with the flue tube, and a flue system. The flue system includes a flue tube, and a cruciform fin metallurgically bonded to the flue tube wall and dividing the flue... | 09/11/2001 |
| 6283067 | Potable water temperature management system A potable water temperature management system includes a device that produces waste heat and that has a primary purpose other than heating potable water. The waste heat from the device is used to heat potable water in a tank. A heat shedding system is act... | 09/04/2001 |
| 6161506 | Pulsed air combustion high capacity boiler A pulsed combustion high capacity boiler has air inlet flapper valves at an inlet air decoupler toward a combustion chamber, with a fuel supply and an ignitor upstream of the combustion chamber along a flow path. The combustion chamber is immersed in a wa... | 12/19/2000 |
| 6055944 | Heating device A storage water heater including a vessel for accumulating a volume of water which is to be heated, said vessel having water inlet and outlet means, at least one gas burner, an exhaust gas outlet and a temperature regulating device. In order to evaluate t... | 05/02/2000 |
| 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 |
| 6019069 | Gas-fired heaters with burners which operate without secondary air and have a substantially sealed combustion chamber A gas-fired burner apparatus includes a porous combustion surface disposed in a combustion chamber substantially sealed to prevent entry of secondary air. A subatmospheric pressure is maintained in the combustion chamber by a natural or aspirated draft. T... | 02/01/2000 |
| 5970923 | Tank structure for hot-water supply unit A tank structure of a hot-water supply unit capable of permitting tap water under a high pressure to be supplied thereto without using any safety mechanism. An inner barrel of a tank body is formed by rounding or bending a flat plate of an increased thick... | 10/26/1999 |
| 5950573 | Power vented water heater with air inlet A water heater comprising 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 products from t... | 09/14/1999 |
| 5937796 | Gas apparatus for heating fluids The invention relates to an apparatus for heating fluids which includes a combustion chamber (20) in which the head (21c) of the burner with the burner openings (39) for the flames is juxtaposed with a wall (21a, 21b) of the chamber itself separating this... | 08/17/1999 |
| 5924390 | Water heater with co-located flue inlet and outlet A blower draws air through an inlet duct from outside a building or dwelling and injects air and fuel into a sealed combustion chamber where they are ignited and burned within a ceramic crucible within combustion chamber. The pressurized combustion gases ... | 07/20/1999 |
| 5913675 | Low NOx gas burner A gas burner adapted to discharge said fuel at its the periphery for combustion, includes upper and lower concave plates secured together to define a chamber and an outer periphery having a plurality of burner ports. The upper plate preferably has a perip... | 06/22/1999 |
| 5881681 | Water heating system A water heating device comprising (a) combustion means for igniting a combustible mixture of air and gas for heating water; (b) heat exchanger means for providing heat transfer between the hot gases and the water, the exchanger means including a combustio... | 03/16/1999 |
| 5875739 | Gas-fired heaters with burners which operate without secondary air and have a substantially sealed combustion chamber A gas-fired burner apparatus includes a porous combustion surface disposed in a combustion chamber substantially sealed to prevent entry of secondary air. A subatmospheric pressure is maintained in the combustion chamber by a natural or aspirated draft. T... | 03/02/1999 |
| 5871006 | Hot water heating system A hot water heating system having a water tower with a cold water inlet at the upper end and a hot water outlet at the lower end has a large diameter combustion inlet opening in the sidewall. A combustion chamber is secured to the water tower at the combu... | 02/16/1999 |
| 5845632 | Vent damper including pivot poppet A vent damper is provided for limiting the flow of ambient air through the central core of a hot water heater having a combustion chamber, the central core forming an exhaust port leading to an exhaust duct for evacuation of exhaust gases from the combust... | 12/08/1998 |
