Class 122/20A - Subsidiary-heater firebox

Subclass of Class 122 - Liquid heaters and vaporizers
No. of patents: 21
Last issue date: 10/21/2008

Number	Title	Issue Date
7438024	Wood-burning boiler A wood-burning boiler is provided, comprising a combustion chamber having a first air intake, and being adapted for holding combustible wood. An exhaust chamber is fluidly coupled to the combustion chamber, and is adapted to receive burnt gases from the combustion c...	10/21/2008
6938581	Supplemental water heater tank and system A supplemental water heater tank and system features a supplemental tank with an inner vessel surrounded by an outer jacket. The space there between is generally evacuated of air so that the inner vessel is vacuum insulated. The supplemental tank includes water inle...	09/06/2005
6089223	Direct contact water heating system A direct contact water heating system employs a vertical water tower having a sidewall with a combustion inlet opening spaced above the tower lower end. A generally horizontal combustion chamber has a sidewall in communication with the tower combustion in...	07/18/2000
5823175	Thermal protective barrier A thermal protective barrier is provided for space heating units in the form of a relatively thin panel having an interior volume filled with a non-combustible liquid (water and/or antifreeze mix, etc.). Two of the embodiments are flat and are adapted to ...	10/20/1998
4915297	Liquid heating system for concrete plants A water heating system for a concrete batching plant comprising a closed tank (1) having low heat transfer properties for containing the liquid to be heated, a heat exchanger having liquid carrying conduit means connected by conduits (2,3) to said tank (1...	04/10/1990
4821682	Method and apparatus for utilizing waste heat in hot water heaters Normally wasted heat from the pilot burner and flue of a fuel fired hot water heater is used to preheat the water supplied to the main tank. An auxilliary storage tank receives incoming cold water. Water from the storage tank circulates through a conduit ...	04/18/1989
4798240	Integrated space heating, air conditioning and potable water heating appliance Space heating and cooling and potable water heating are provided by a single appliance. The housing appliance is divided into four sections: a lower water storage section, a middle hardware section, an upper internal air handling section and a side extern...	01/17/1989
4753220	Direct contact water heater A direct contact water heater comprises a cylindrical column having a plurality of heat exchange bodies disposed in the upper portion thereof, a spray nozzle disposed above the heat exchange bodies for discharging water thereon and a combustion chamber ex...	06/28/1988
4699091	Method and apparatus for utilizing waste heat in hot water heaters Normally wasted heat from the pilot burner and flue of a fuel fired hot water heater is used to preheat the water supplied to the main tank. An auxilliary storage tank receives incoming cold water. Water from the storage tank circulates through a conduit ...	10/13/1987
4637347	Improved continuous low fluid exchange water heater This invention relates to an improved hot water heater and more particularly to a hot water heater which is normally utilized in conjunction with a hydronic boiler. The hot water heater has a single opening which is closed by a removable cover plate. The ...	01/20/1987
4604991	Hot water preheater system A secondary heating source is used to preheat the water supplied to a conventional hot water tank. Three two-position valves permit the water from the water supply line to be supplied directly to the hot water tank during part of the year (such as the win...	08/12/1986
4480631	Apparatus for delivering heated fluid medium Apparatus for delivering hot water includes a vessel for releasably containing water and a heat generator compartment in heat transfer relation to the vessel. A conduit in the vessel circumscribes the exhaust funnel of the heat generator and has an inlet ...	11/06/1984
4412652	Economizer for building heating systems An economizer is provided for building heating systems and the like, of the type having a forced air furnace with adjacent combustion and heat exchange chambers, and a hot water reservoir or heater. The economizer comprises lower and upper heat transfer c...	11/01/1983
4403573	Water heating apparatus for solid fuel firebox An exterior wall of the firebox of a wood burning stove or the like fixedly supports in close heat exchanging relation therewith a plurality of aluminum fins comprising plates arranged in close side-by-side, substantially coplanar and parallel relation. A...	09/13/1983
4392455	Heat-sink water heater A heat-sink type of water heater unit is disclosed wherein the unit is designed for external installation on a stove to transfer heat from the stove to water flowing through the unit, to pre-heat the water for subsequent use. The unit has a flat surface w...	07/12/1983
4337730	Hot water probe A hot water probe for use with a wood or other solid fuel burning appliances (stoves, furnaces, fireplaces, etc.) to provide supplemental hot water heating whereby the use of natural gas or other non-renewable fuel can be conserved. The probe may comprise...	07/06/1982
4281604	Domestic boiler A boiler construction is disclosed which eliminates the need for bolting together of internal parts thereby greatly facilitating mass production and rapid assembly procedures. Internal side protectors, in addition to establishing the size of the boiler in...	08/04/1981
4240362	Boiler for domestic heating systems A compact rectangular boiler for hot water heating systems serves as a booster or helper boiler but can be used in some cases as a primary boiler. A boiler power module consisting of fire tubes and a surrounding water chamber is readily removable like a s...	12/23/1980
4141343	Hot-water boiler of the direct-heating type A hot-water boiler of the direct-heating type basically comprising a combustion chamber and a heat-exchange chamber which encircles the lower half part of the combustion chamber and which has a number of reticulate plates therein. Combustion gas generated...	02/27/1979
4052962	Economizer device for exploiting the thermal output of heating installations An economizer device for fully exploiting the thermal output of central heating installations for heating fluids that incorporates a source of heat herein called "heating fluid" and a source of fluid circulating between a cold zone and a warm zone, herein...	10/11/1977
3994281	Heat generator of the combustion product condensation type and process for heating a heat-carrying fluid A heat generator of the type condensing the combustion products of a liquid or gaseous hydrogen fuel suitable for the heating of a heat-bearing fluid, including a tank containing at the top a zone of direct contact between the heat-bearing fluid and the c...	11/30/1976

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Class 122/20A - Subsidiary-heater firebox