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| Number | Title | Issue Date |
| 7111653 | Expansion tank An expansion tank (1) which is intended to be connected to a pipe system which is filled or is to be filled with liquid, comprises a substantially closed tank (2) having at least a first connection opening (6) for connection to a liquid pipe, a ... | 09/26/2006 |
| 4732319 | Fill valve for a water heating system A fill valve for a water heating system. An expansion tank is provided with a flexible diaphragm which divides the tank into a water chamber and a closed gas chamber. A fill valve assembly is mounted within an opening in the tank and includes a valve body... | 03/22/1988 |
| 4601426 | Excess-pressure-free boiler and accumulator heating system The heating system includes water-radiators, a heat source as a boiler and/or one or more water-accumulators, an expansion vessel and a pipe-circulation system interconnecting the radiators and the source through which the water is pumped. The system is i... | 07/22/1986 |
| 4471907 | Venturi pressurizer for incompressible-liquid circulating systems A closed-loop, incompressible-liquid circulating, hydronic heating system, for instance, a hot water heating system, which utilizes a Venturi-type control device to effect communication between the circulating hydronic heating system and a storage tank. T... | 09/18/1984 |
| 4401101 | Wood-fired boiler and storage system A wood-fired boiler and hot liquid storage system includes a top-vented storage tank for the liquid, a firebox supported within the tank at a level for complete immersion within the liquid, with the bottom of the firebox spaced above the bottom of the tan... | 08/30/1983 |
