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| Number | Title | Issue Date |
| 8023807 | Resistor anode assembly A sacrificial anode assembly. The sacrificial anode assembly includes a sacrificial anode, an insulator positioned around an end of the anode, an electric coupler positioned around the insulator and extending beyond the end of the anode, the electric coupler electri... | 09/20/2011 |
| 7387713 | Resistored anode construction A sacrificial anode assembly operative to inhibit corrosion in the metal tank portion of a water heater includes a cylindrical metal anode member having an end retained within a tubular, electrically non-conductive plastic insulating sleeve which, in turn, is captiv... | 06/17/2008 |
| 7372005 | Water storage device having a powered anode A water heater having a powered electrode and a method of controlling the water heater. The water heater includes a tank to hold water, a heating element, an electrode, and a control circuit. The control circuit includes a variable voltage supply, a voltage sensor, ... | 05/13/2008 |
| 7203418 | Electric water heater with hot water outlet dip tube An electric water heater including a water container; an element associated with the water container to heat water in the water container; a cold water inlet associated with the water container; a hot water outlet associated with the water container; and a dip tube ... | 04/10/2007 |
| 7141264 | Functional water Tea-based beverages prepared from functional water are described. The functional water comprises less than 200 ppm total dissolved solids and, when used to make a tea-based beverage, results in a beverage having superior flavor and appearance characteristics, even w... | 11/28/2006 |
| 7135396 | Method of making a semiconductor structure Methods of making a semiconductor structure are disclosed. A refractory metal layer containing W, TiW, Ta, or TaN and semiconductor layer are formed on a substrate that contains copper in, for example, a via therein. A portion of the refractory metal layer and semic... | 11/14/2006 |
| 7027725 | Heating system of floating structure including heating panel having round to elliptic inner fluid pathway Disclosed herein is a heating system of floating floor structure including a heating panel with a circular or elliptical inner fluid pathway. The heating panel having the circular or elliptical inner fluid pathway overcomes limitation on pressure resistance, which i... | 04/11/2006 |
| 6959245 | Soil and topography surveying Methods of characterizing subsurface conditions in a selected geographic region previously associated as a whole with a specific subsurface material characteristic reference profile such as from a USDA-NRCS soil survey. The method includes deploying a sensing tool a... | 10/25/2005 |
| 6915069 | Temperature sensor assembly, water heater including the temperature sensor assembly, and method of sensing a temperature A temperature sensor assembly and method for use in a water heater. The temperature sensor assembly includes a sensor disposed within a non-planar base that at least partially defines a volume, a collector coupled to the base, and a reflector coupled to the base suc... | 07/05/2005 |
| 6871014 | Water treatment system and water heater with cathodic protection and method A water heater comprising a housing defining a water heating chamber, at least a portion of the housing being metallic, and a metallic heating element disposed in the housing for heating the water, wherein the metallic portion of the housing and a metallic heating e... | 03/22/2005 |
| 6606452 | Hot water heater anode A bi-metallic anode is disclosed for use in small hot water heaters such as in recreational vehicles, motor homes and the like. The anode includes a threaded portion and a shaft formed from a relatively non-corrosible metal such as steel, A second section... | 08/12/2003 |
| 6510782 | System for electronically monitoring scaling in an apparatus for heating and/or evaporating a liquid A system for electronically monitoring scaling in an apparatus for heating and/or evaporating a liquid, comprising a container for at least temporarily receiving the liquid. The container comprises a liquid inlet, a liquid outlet and/or a vapor outlet and... | 01/28/2003 |
| 6508208 | Water heater with arrangement for preventing substantial accumulation of sediment and method of operating same An automatic self-cleaning electric or gas water heater has a sloped conical bottom wall and a manifold such that water flowing through the manifold gently washes sediment to the bottom wall. The sediment slides along the bottom wall to a bottom drain. Th... | 01/21/2003 |
| 6262401 | Gold-plated water heater element and method of making same A self-cleaning water heater element is provided. The water heater element is plated with a layer of gold such that the gold surface has a low surface roughness. The smooth gold surface inhibits scale formation on the water heater element. The gold-plated... | 07/17/2001 |
| 6205291 | Scale-inhibiting heating element and method of making same A scale-inhibiting water heater element is provided. The water heater element is coated with a diamond-like coating which has low surface tension to keep scale from forming, and is thermally conductive, which helps prevent overheating. The scale-inhibitin... | 03/20/2001 |
| 5943475 | Heating element for water heaters with scale control An improvement in electrical elements for a water heater includes a mass attached to the element for reducing the deposition of hard water scale on element surfaces, particularly in the return bend areas. In one embodiment, a flow accelerator tube enclose... | 08/24/1999 |
| 5894541 | Electric heater assembly An electric heater assembly suitable for heating molten metal, the electric heater assembly having a sleeve comprised of a closed end suitable for immersing in the molten metal. The sleeve is fabricated from a composite material comprised of titanium allo... | 04/13/1999 |
| 5855747 | Performance enhancing coating for water heater Coatings are described to improve the performance of cathodic protection systems used in water heater tanks. Semi-permeable sparingly soluble films of silicates and other organic resins protect critical areas of sacrificial anodes from concentrated usage ... | 01/05/1999 |
| 5574822 | Compact electric water heater A water heater including a steel water tank having a bottom plate and a deep drawn body portion welded together, the tank having a glass lining and openings to receive and discharge water; foam insulation surrounding the body portion; an outer covering su... | 11/12/1996 |
| 5335311 | Modular galvanic current control resistor assembly for mounting on an electric immersion heater A modular galvanic current control resistor assembly for application to a metallic sheathed heating element of a domestic water heating tank to prevent heating element corrosion includes a circular metallic disc adapted to fit over the sheath ends of a U-... | 08/02/1994 |
| 5334299 | Water heater having improved sacrificial anode assembly therein A water heater includes a metal storage tank for holding a quantity of water to be heated. Extending into the interior of the tank is a sacrificial anode assembly operative to inhibit corrosion of the tank and including a cylindrical metal anode member ha... | 08/02/1994 |
| 5023928 | Apparatus for reducing the current drain on the sacrificial anode in a water heater The sacrificial anode in an electrically-heated water heater is protected against excessive current drain and premature dissolution resulting from the cathodic effect of the metal jacket on the heating element by a protective device which provides an effe... | 06/11/1991 |
| 4975560 | Apparatus for powering the corrosion protection system in an electric water heater A common source of DC potential is utilized to simultaneously provide power to the protective anode in an electrically heated hot water heater and to the circuit used to bias the heating element jacket to reduce the current load the jacket would otherwise... | 12/04/1990 |
| 4972066 | Method and apparatus for reducing the current drain on the sacrificial anode in a water heater The adverse effects of the exposed metal jacket on a heating element in an electric water heater on the life and performance of a protective anode are eliminated or substantially reduced with the system that imposes a low voltage differential between the ... | 11/20/1990 |
| 4879801 | Cathodically protected water heater A cathodically protected water heater which eliminates the need of a conventional anode rod. The water heater tank includes a cylindrical shell enclosed by upper and lower heads and a flue which is mounted within openings in the lower and upper heads. The... | 11/14/1989 |
| 4848616 | Electric immersion heating unit with readily removable and replaceable galvanic current control resistor An electric immersion heating unit for use in conjunction with a metallic water heater tank provided with a sacrificial anode has the legs of a U-shaped metallic sheathed heating element extending in electrically insulated relationship through a metallic ... | 07/18/1989 |
| 4830724 | Stamped metal anode cap assembly An anode cap assembly comprising a stamped metal cap having a generally cylindrical inner section and a closed outer section. An anode rod formed of a metal electronegative to steel is disposed in the cylindrical inner section and the steel core wire of t... | 05/16/1989 |
| 4626875 | Apparatus for liquid-jet recording wherein a potential is applied to the liquid An apparatus for liquid-jet recording having heat-generating means and means for jetting a liquid utilizing an energy generated by the heat-generating means comprises an electrode provided in contact with the liquid in impart a potential to the liquid low... | 12/02/1986 |
| 4543469 | Grounding arrangement for metal sheathed heating element having a plastic mounting member An electric metallic sheathed immersion heating element adapted to be mounted on the metal wall of a fluid tank with the active heating portion of the element extending through an opening in the tank wall into the contents thereof includes a rigid plastic... | 09/24/1985 |
| 4484243 | Protective circuit arrangement for a sheathed heating element A protective circuit arrangement for sheathed heating elements which interrupts ground fault conditions by effectively decoupling the power line from the heating element regardless of the polarity of the power supply connections. A fusible link couples ea... | 11/20/1984 |
| 4397057 | Apparatus for cleaning carpets and the like Home or residential cleaning apparatus of the hot water or steam extraction type comprising a hot solution tank, a pump for pumping the hot cleaning solution to an applicator nozzle, a wet pick-up vacuum for extracting soiled cleaning solution, an electri... | 08/09/1983 |
| 4326121 | Electric immersion heater for heating corrosive liquids An electric immersion heater of planar construction for use in industrial processes is constructed of a non-corrodable material and may be immersed at the side of a processing not containing corrosive liquids. The heater includes a thin planar polymeric s... | 04/20/1982 |
| 4255647 | Water tank having electric heating element and cathodic corrosion protection An anticorrison protected small electric household water heating tank includes a metal tank having a passive anticorrosive layer provided on an inner wall thereof. A U-shaped electric immersion heating element is horizontally arranged in a lower region of... | 03/10/1981 |
| 4219857 | Protective method and circuits for sheathed electrical resistance heating units In one embodiment, a sheathed electrical resistance heating unit is operated from a 120 volt unbalanced-to-ground household power line. The heating unit sheath is grounded. In order to interrupt a fault between the actual resistance heating element and th... | 08/26/1980 |
| 4152578 | Electric heating elements The novel electric heating element is particularly useful as a water heating element, although its use is not so limited. The element comprises the usual metal-sheathed heater having electrical termination at one end of the sheath. The customary water hea... | 05/01/1979 |
| 4136001 | Non-sacrificial anode and water heater construction Non-sacrificial anode for use in a hot water heater has a single elongated electrically conductive wire extending within the interior of the water heater tank. Anode distribution points made of platinum coated tantalum are attached to the conductive wire ... | 01/23/1979 |
| 4103319 | Hazard prevention circuit for immersion heaters A hazard prevention control circuit is provided for an electric heater having heating coils enclosed in a quartz tube immersed in a tank of solution. A circuit breaker is connected in series with a contactor coil controlling a set of contacts connecting t... | 07/25/1978 |
| 4017714 | Segmented sacrificial anode attachment to water heating element The attachment is easily replaced, is flexible and elongated, and is adapted to be inserted into a tank for heating a liquid through an opening provided in the metal shell of the tank for mounting an electric immersion heater in the tank. The attachment i... | 04/12/1977 |
| 3983361 | Electric heating apparatus for heating corrosive solutions A pyrex tank for heating corrosive solutions is formed with a main body portion having an open top and with a small annular cavity portion depending from the bottom of the main body portion. A heater unit comprising a heating element enclosed in a quartz ... | 09/28/1976 |
| 3970817 | Hazardous leakage current preventing for refractory-encased heater elements Low-level "trickle" electric heater means in diverse forms prevents hygroscopic moisture accumulation adjacent relatively open or exposed ends of refractory-encased conventional electrical heating elements, thereby to prevent excessive leakage current thr... | 07/20/1976 |
