US Patent No: 7,063,133
Number of patents in Portfolio can not be more than 2000
Multi-wall heat exchanger for a water heater
Stats
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Jun 20, 2006
Issued date -
Dec 28, 2004
filing date -
11/024,926
serial no -
In Force
status
Importance
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Abstract
A water heater including a tank having a wall defining an interior for holding water is provided. A heat exchange assembly is positioned at least partially within the interior of the tank. The heat exchange assembly has an outer tube extending within the interior of the tank. The outer tube has a wall with an inner surface. An inner tube extends within the outer tube. The inner tube has a wall with an outer surface. A gap is defined between the outer surface of the inner tube and the inner surface of the outer tube. Heat conducting fluid is contained within the gap. The fluid facilitates the transfer of heat between the inner tube and the outer tube.
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First Claim
Related Publications
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 5,081,696 Electrically grounded water heater | 9 | 1991 | |
| 5,372,185 Combined water heater and heat exchanger | 15 | 1993 | |
| 5,485,879 Combined water heater and heat exchanger | 18 | 1994 | |
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| 4,309,982 Process and apparatus for the preparation of hot water from solar energy | 9 | 1979 | |
| 4,345,583 Water heater using solar and non-solar energy | 13 | 1979 | |
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| 5,178,207 Plate heat exchanger with leakage detector | 13 | 1991 | |
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| 4,738,394 Integral liquid-backed gas-fired space heating and hot water system | 12 | 1987 | |
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| 6,098,705 Coil type condenser for refrigerator | 10 | 1998 | |
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| 4,210,199 Heat exchange system | 16 | 1978 | |
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| 4,238,873 Apparatus for collecting and transporting heat energy | 12 | 1978 | |
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| 4,426,037 Boiler for a heating system, as an article of manufacture, a boiler-heating system combination, and a method for heating a heat-transfer medium such as water in a heating system | 13 | 1982 | |
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| 4,871,014 Shell and tube heat exchanger | 20 | 1988 | |
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| 4,461,347 Heat exchange assembly for ultra-pure water | 28 | 1981 | |
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| 5,136,985 Boiler tube support | 18 | 1991 | |
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| 5,228,413 Multiple boiler | 27 | 1992 | |
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| 4,972,902 Triple-wall tube heat exchanger | 10 | 1989 | |
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| 4,267,826 Solar collector for heating and cooling | 15 | 1978 | |
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| 4,201,264 Solar water tank | 8 | 1978 | |
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| 4,273,160 High pressure hose | 37 | 1979 | |
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| 5,787,722 Heat exchange unit | 10 | 1997 | |
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| 4,328,791 Gas supplemented solar collector storage means | 14 | 1980 | |
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| 4,353,410 Method of controlling the heating of a chamber and a controlled chamber-heating installation | 8 | 1979 | |
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| 4,637,347 Improved continuous low fluid exchange water heater | 20 | 1985 | |
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| 6,192,583 Heat exchanger tube and method of manufacturing same | 5 | 1999 | |
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| 4,321,963 Single layer volute heat exchanger | 8 | 1979 | |
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| 4,193,180 Method of forming a heat exchanger | 19 | 1977 | |
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| 4,253,446 Storage reservoirs for liquids heatable by solar energy | 23 | 1978 | |
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| 4,545,365 Fluid heating system utilizing solar energy and waste heat | 8 | 1983 | |
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| 6,789,615 Heat exchanger, in particular for swimming pools | 4 | 2003 | |
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| 5,971,444 Through wall connector | 21 | 1997 | |
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| 4,202,406 Heat exchange system | 16 | 1978 | |
| 4,272,667 Electric fluid heating apparatus employing stackable heat transfer modules | 7 | 1978 | |
| 4,282,861 Water heating system using solar energy | 10 | 1979 | |
| 4,296,799 Solar water tank and method of making same | 21 | 1979 | |
| 4,318,781 Desalinazation apparatus | 9 | 1980 | |
| 4,480,631 Apparatus for delivering heated fluid medium | 12 | 1982 | |
| 4,821,682 Method and apparatus for utilizing waste heat in hot water heaters | 10 | 1987 | |
| 5,037,510 Integrated water distiller and/or water heater and/or furnace | 8 | 1988 | |
| 4,949,680 Water heater having filling dip tube | 15 | 1989 | |
| 5,224,674 Method and apparatus for organizing and identifying intravenous administration lines | 33 | 1992 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Dec 20, 2013 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Dec 20, 2017 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 7.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |