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Class Information
Number: 122/18.1
Name: Liquid heaters and vaporizers > Stand boiler (e.g., water heater, etc.) > Fluid fuel burner > Having heat exchange feature
Description: Subject matter wherein the stand boiler includes means to transfer heat from the burned fuel directly or through the interposing fluid to the wall of the water containing chamber without allowing them to mix.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7617802 |
Condensation heat exchanger |
Nov. 17, 2009 |
| 7614366 |
High efficiency water heater |
Nov. 10, 2009 |
| 7597066 |
Circulation type hot water supply device |
Oct. 6, 2009 |
| 7559293 |
High efficiency water heater |
Jul. 14, 2009 |
| 7506386 |
Portable water heater |
Mar. 24, 2009 |
| 7415943 |
Single pass fuel-fired fluid heating/storage device |
Aug. 26, 2008 |
| 7353781 |
Arrangement structure of heat exchanger in condensing gas boiler |
Apr. 8, 2008 |
| 7337753 |
Water heater |
Mar. 4, 2008 |
| 7337752 |
Instantaneous fuel-fired water heater with low temperature plastic vent structure |
Mar. 4, 2008 |
| 7316206 |
Water heater with noise attenuation |
Jan. 8, 2008 |
| 7302916 |
Condensation heat exchanger with a gas/air heat collector |
Dec. 4, 2007 |
| 7290503 |
High efficiency, wet-base, downfired multi-pass water heater |
Nov. 6, 2007 |
| 7281497 |
Condensation heat exchanger with plastic casing |
Oct. 16, 2007 |
| 7267083 |
Condensing heat exchanger with double bundle of tubes |
Sep. 11, 2007 |
| 7258080 |
Fuel-fired dual tank water heater having dual pass condensing type heat exchanger |
Aug. 21, 2007 |
| 7044124 |
Heating apparatus having insulation-contacted fuel burners |
May. 16, 2006 |
| 6945197 |
Water heater |
Sep. 20, 2005 |
| 6938582 |
Heat exchanging type boiler |
Sep. 6, 2005 |
| 6923148 |
Combustion chamber with high temperature protective coating |
Aug. 2, 2005 |
| 6907846 |
Condensing gas boiler having structure of preventing corrosion caused by using heterogeneous metal |
Jun. 21, 2005 |
| 6877461 |
Portable instant hot water heater |
Apr. 12, 2005 |
| 6763786 |
Equipment for water heater |
Jul. 20, 2004 |
| 6694926 |
Water heater with continuously variable air and fuel input |
Feb. 24, 2004 |
| 6668762 |
Indirect fired process heater |
Dec. 30, 2003 |
| 6666173 |
Hot gas liquid heater |
Dec. 23, 2003 |
| 6662758 |
Condensing gas boiler for recollecting condensed latent heat using uptrend combustion |
Dec. 16, 2003 |
| 6640753 |
Steam generator of a water-tube type |
Nov. 4, 2003 |
| 6619951 |
Burner |
Sep. 16, 2003 |
| 6612267 |
Combined heating and hot water system |
Sep. 2, 2003 |
| 6606968 |
Water heater unit |
Aug. 19, 2003 |
| 6584940 |
Flue pipe control |
Jul. 1, 2003 |
| 6553948 |
Water heater |
Apr. 29, 2003 |
| 6415744 |
Combustion boiler |
Jul. 9, 2002 |
| 6378777 |
Natural draft water heater |
Apr. 30, 2002 |
| 6334411 |
High efficiency, glass-lined, combination space and hot water heater |
Jan. 1, 2002 |
| 6318304 |
Water heater |
Nov. 20, 2001 |
| 6311646 |
Hot water heater |
Nov. 6, 2001 |
| 6283067 |
Potable water temperature management system |
Sep. 4, 2001 |
| 6237544 |
Water heater and gas burner |
May. 29, 2001 |
| 6138613 |
Ignition inhibiting gas water heater |
Oct. 31, 2000 |
| 5983841 |
Heat exchanger |
Nov. 16, 1999 |
| 5632236 |
Gas-fired heaters with burners which operate without secondary air and have a substantially sealed combustion chamber |
May. 27, 1997 |
| 5579756 |
Combination heater |
Dec. 3, 1996 |
| 5537955 |
Hot water heater |
Jul. 23, 1996 |
| 5435154 |
High temperature regenerator of an absorption type hot and cold water generator and absorption type hot and cold water generator |
Jul. 25, 1995 |
| 5361729 |
Water heaters |
Nov. 8, 1994 |
| 5337728 |
Liquid heating apparatus |
Aug. 16, 1994 |
| 5293446 |
Two stage thermostatically controlled electric water heating tank |
Mar. 8, 1994 |
| 5109806 |
Premix boiler construction |
May. 5, 1992 |
| 5105799 |
Portable fluid heater |
Apr. 21, 1992 |
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