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| Number | Title | Issue Date |
| 8064758 | Electric tankless water heater In various embodiments, the invention provides a system for heating a liquid, such as, for example, water, comprising a plurality of liquid heaters, the inlets and outlets of which are respectively connected in a parallel flow relationship by respective manifolds, a... | 11/22/2011 |
| 7773868 | Method and system for recirculating hot water A method of delivering hot water to a water fixture in which a supplemental hot water heater is installed before the cold water inlet of a tankless hot water heater. The supplemental hot water heater is used to recirculate heated water through the tankless hot water... | 08/10/2010 |
| 7616873 | Thermo-plastic heat exchanger A flow-through instantaneous fluid heater system is designed to satisfy the need for a heater not limited by being connected to a storage tank and which can be made using a plastic casing, incorporating cool-down when out of service and with features of venting and ... | 11/10/2009 |
| 7567751 | Electric tankless water heater In various embodiments, the invention provides a system for heating a liquid, such as, for example, water, comprising a plurality of liquid heaters, the inlets and outlets of which are respectively connected in a parallel flow relationship by respective manifolds, a... | 07/28/2009 |
| 7460769 | Modular water heating systems Modular water heating systems include a self-standing rack on which one or two separate tankless water heaters and a separate water storage tank are mounted. A pump recirculates the water between the storage tank and the water heater or heaters to maintain a drawdow... | 12/02/2008 |
| 7330645 | Instant water heating apparatus for cleaning machine Provided is an instant water heating apparatus for a cleaning machine capable of instantaneously heating fluid passing through a flow path and preventing the temperature of the heated fluid from creating a laminar flow. The instant water heating apparatus includes a... | 02/12/2008 |
| 7249628 | Apparatus for conditioning the temperature of a fluid This invention relates to an apparatus for conditioning the temperature of a fluid by utilizing a thermoplastic heat exchanger (50) comprised of a plurality of hollow tubes. The apparatus controls the temperature of a process fluid inside the heat exchanger (... | 07/31/2007 |
| 7190894 | Energy efficient electric water heater system that provides immediate hot water at a point of use and a method therefor A water heater system that will provided immediate hot water to a point of use has a water storage container having an inlet coupled to a water pipe and an outlet coupled to a point of use fixture. A low current heating element is located within the water storage co... | 03/13/2007 |
| 7190886 | Instantaneous electric water heaters This invention relates to an electric water heater comprising one or more heating resistors and the means for supplying and controlling electric power supplied to the resistors. The heaters of the present invention are capable of heating incoming water to a desired ... | 03/13/2007 |
| 7164851 | Modular tankless water heater control circuitry and method of operation Control circuitry is disclosed for use with a tankless water heater system including a plurality of water conduits connected in series. The control circuitry includes a plurality of water heater elements, one each associated with each of the plurality of water condu... | 01/16/2007 |
| 7147036 | Heat exchanger, a method for producing the same and a dehumidifier containing the same Two passages adjacent to each other via walls are formed spirally, and heat is exchanged between fluids passing through the passages via the walls. Upper and lower end faces of the spiral passages are covered with end plates, and the spiral passages and the end plat... | 12/12/2006 |
| 7112768 | Temperature control system for a bathing unit A temperature control system for a bathing unit that includes a water holding receptacle and a heating module. The temperature control system comprises a plurality of actuators associated to the heating module and a temperature regulation device in communication wit... | 09/26/2006 |
| 7088915 | Modular tankless water heater A tankless water heater module is disclosed and includes a casing having a first end, a second end and a plurality of conduits formed therein. A top head manifold is coupled to the first end of the casing and includes a port aligned with each of the plurality of con... | 08/08/2006 |
| 7046922 | Modular tankless water heater A tankless water heater module is disclosed and includes a casing having a first end, a second end and a plurality of conduits formed therein. A top head manifold is coupled to the first end of the casing and includes a port aligned with each of the plurality of con... | 05/16/2006 |
| 7039305 | Heat conductive tubular electric heater A heat conductive tubular electric heater is disclosed. In the heater body, a water inlet tube is connected to a heat conductive tube and an electric tube is installed within the heat conductive tube so as to form a water path between a periphery of the electric tub... | 05/02/2006 |
| 7025119 | Heat exchanger, a method for producing the same and a dehumidifier containing the same Two passages adjacent to each other via walls are formed spirally, and heat is exchanged between fluids passing through the passages via the walls. Upper and lower end faces of the spiral passages are covered with end plates, and the spiral passages and the end plat... | 04/11/2006 |
| 7020387 | Hybrid water heater A tankless water heater powered by a fuel cell. In preferred embodiments, a fuel cell powered water heater in which the fuel cell is electrically connected to the electrical system of the building in which the water heater is installed as well as to the public elect... | 03/28/2006 |
| 6968125 | Suspendable industrial electrical liquid heater An electric heater for industrial liquids comprises a plastic flat box that contains a stainless steel pressure vessel holding a number of parallel electrical heating rods. These heating rods are interlaced with shorter “I” shaped Teflon rods which generates a t... | 11/22/2005 |
| 6957014 | Liquid heater A liquid heater comprising a plurality of storage compartments for containing liquid to be heated. The storage compartments being connected together in series and comprising at least a first end compartment for receiving liquid to be heated and a second end compartm... | 10/18/2005 |
| 6955301 | Water heater and control An improved heater and method of controlling the same is provided. The water heater has the combination of a tank for holding water, a heater for heating the water, a controller having logic to regulate the heater, and first and second sensors. Each of the sensors d... | 10/18/2005 |
| 6951456 | Microcombustor and combustion-based thermoelectric microgenerator A generally toroidal counterflow heat exchanger is the main element of a combustor that operates at a micro scale. The combustor includes a central combustion region with openings to a reactant gas channel and an exhaust gas channel. The reactant channel and exhaust... | 10/04/2005 |
| 6909843 | Electric tankless water heater In various embodiments, the invention provides a system for heating a liquid, such as, for example, water, comprising a plurality of liquid heaters, the inlets and outlets of which are respectively connected in a parallel flow relationship by respective manifolds, a... | 06/21/2005 |
| 6701069 | Pre-heating contiguous in-line water heater An improved pre-heating, contiguous in-line water heater is described. The in-line water heater utilizes a passive heating means to passively heat at least a portion of the input water received by the in-line water heater. The result is a more cost effici... | 03/02/2004 |
| 6600875 | Water flow heater Water flow heater with a first heater element (20) for supplying a fixed power, a second, controllable heater element (30), a temperature sensor (40, 50) for measuring the temperature of heated water, and a control unit (22, 32, 80) for controlling the he... | 07/29/2003 |
| 6574426 | In-line tankless instantaneous electrical resistance water heater An improved in-line tankless electrical resistance water heater includes removable brass bottom and top flanges to form an internal chamber in a tubular body. The top brass flange has a cold water inlet and a hot water outlet for connection to a hot water... | 06/03/2003 |
| 6539173 | Sensor controlled water heater and method of use A water heater apparatus for aircraft applications has three water heating tubes joined in series interconnection and positioned in side-by-side adjacency, where each of the tubes provides an electrical resistance heater part of a 3 phase electrical power... | 03/25/2003 |
| 6532339 | Device for thermally processing a gas stream, and method for same A spiral shaped device for thermally processing a gas stream and a method of use thereof is provided. The spiral shaped device has at least one sidewall formed into a coil; at least one spiral passage, defined by the sidewall, for directing the gas stream... | 03/11/2003 |
| 6463999 | Multiloop temperature control system A multiloop temperature-control system has a hydraulic bus connected to a plurality of loops for the temperature-control medium and respective hydraulic modules connected to the hydraulic bus, and through the hydraulic bus, to these loops. Plug connectors... | 10/15/2002 |
| 6418276 | Method and apparatus for heating water rapidly at low power requirement A method for heating water rapidly at low power requirement includes the steps of (1) energizing and heating a heating element of a first heating device for a first period; (2) simultaneously de-energizing the heating element of the first heating device, ... | 07/09/2002 |
| 6282371 | Devices for reducing emissions, and methods for same An integrated oxidation-reduction process whereby a thermal oxidation zone and a NOx reduction zone are incorporated into a single device. A thermal oxidation and catalytic reduction system having a multi-spiral, heat recuperative configuration and includ... | 08/28/2001 |
| 6240250 | Compact in-line tankless double element water heater A compact "in-line" tankless double element water heater includes a top connected to a manifold having a cold water inlet and a hot water outlet for connection to the cold, and hot water lines of a faucet. The compact water heater includes a body with a p... | 05/29/2001 |
| 6076359 | System and method for controlled delivery of liquified gases Provided is a novel system and method for delivery of a gas from a liquified state. The system includes: (a) a compressed liquified gas cylinder having a gas line connected thereto through which the gas is withdrawn; (b) a gas cylinder cabinet in which th... | 06/20/2000 |
| 5947722 | Heat exchanger for particulate material A particulate material heating system and method for heating particulate material having a core which is heated to a predetermined temperature. The core has a plurality of serpentine passages which receive particulate material from a metering device havin... | 09/07/1999 |
| 5892887 | Electric water heater with a pair of interconnected heating chambers having concentric copper tube structures A water heater for use in a carpet cleaning system has a pair of inner copper tubes which are press fit into outer copper sleeves. Each tube/sleeve combination defines a heating chamber. A hollow tubular bridge extends perpendicularly between and in fluid... | 04/06/1999 |
| 5866880 | Fluid heater with improved heating elements controller An electrically powered water heater includes a plurality of heating elements for substantially instantaneous heating of fluid passing through the heater. A controller for powering the plurality of heating elements is responsive to a temperature sensor in... | 02/02/1999 |
| 5787229 | Electric hot water tank with layered storage An electric hot water heater tank is fitted with a plurality of separators that divide the tank into a plurality of chambers surrounding the tank axis and extending between the top and bottom walls. The adjacent chambers communicate alternately in a direc... | 07/28/1998 |
| 5784531 | Instantaneous fluid heating device and process Instantaneous fluid heating device and process including an instantaneous fluid heating device which features forced fluid recirculation past/through heating elements/vessel featuring immersible electrical heating elements in a plurality of heating vessel... | 07/21/1998 |
| 5740315 | Fluid heating apparatus A fluid heating apparatus in which a heating unit (2) and a fluid supply adjusting unit (3) are accommodated in a casing in a manner separated from each other and connected through a flow-in tube (8) and a flow-out tube (9) and the fluid supply adjusting ... | 04/14/1998 |
| 5723848 | Heating cable control and monitoring method and system A method and system for controlling heating cables wherein a plurality of two-conductor heating cables are disposed in contact with heatable vessels to heat the vessels. Power lines having at least two conductors are connected to the heating cables throug... | 03/03/1998 |
| 5465573 | Multi-stage honeycomb heater A multi-stage honeycomb heater includes: at least two honeycomb heaters electrically connected with each other and disposed along a stream of fluid; the two honeycomb heaters including furthest upstream honeycomb heater and a an adjacent honeycomb heater ... | 11/14/1995 |
