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Class Information
Number: 122/14.3
Name: Liquid heaters and vaporizers > Stand boiler (e.g., water heater, etc.) > And condition responsive feature > Having water flow control feature
Description: Subject matter wherein the condition responsive feature includes means to effect direction of movement or quantity of the water.










Sub-classes under this class:

Class Number Class Name Patents
122/14.31 Using valve actuated by flow or pressure (e.g., check valve, etc.) 58


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8662022 Water heater Mar. 4, 2014
8596225 Anti-stacking pump assembly for a water heater and method of operating the same Dec. 3, 2013
8461493 Energy conservation system Jun. 11, 2013
8061380 Automatic flow shut-off system Nov. 22, 2011
8006714 Automatic flow shut-off system Aug. 30, 2011
7861678 High-efficiency water heater dip tube and method for reducing turbulence in water heaters Jan. 4, 2011
7773868 Method and system for recirculating hot water Aug. 10, 2010
7634976 Apparatus and method for delivering water into a water heater Dec. 22, 2009
7631662 Hot/cold fluid isolation valve Dec. 15, 2009
7392766 Temperature and pressure relief apparatus for water heater Jul. 1, 2008
7270087 Heat trap Sep. 18, 2007
6935280 Cold water inlet for reducing accumulation of scale Aug. 30, 2005
6920844 Thermal expansion arrester for water heaters Jul. 26, 2005
6877461 Portable instant hot water heater Apr. 12, 2005
6612267 Combined heating and hot water system Sep. 2, 2003
6553947 Water mixing system for water heaters Apr. 29, 2003
6543393 Fire suppressing water heater system Apr. 8, 2003
6532906 Inlet heat recovery module for water heater Mar. 18, 2003
6302063 Water heater heat trap with pressure relief assembly Oct. 16, 2001
6289852 Hot water and steam generating method and apparatus Sep. 18, 2001
6269780 Water heater heat trap Aug. 7, 2001
6173681 Liquid feed pre-heater Jan. 16, 2001
6059193 Fitting housing device for a water heater May. 9, 2000
6055944 Heating device May. 2, 2000
5857482 System for control of fluid vessel overflows Jan. 12, 1999
5778829 Gas boiler Jul. 14, 1998
5769033 Hot water storage Jun. 23, 1998
5690061 Water heater with expansion tank Nov. 25, 1997
5596953 Gas boiler Jan. 28, 1997
5588088 Hot water tempering system utilizing a storage tank, a bypass line and a proportional flow controller Dec. 24, 1996
5586572 Hydrothermal stabilizer Dec. 24, 1996
5577491 Heat trap for use with hot water heaters and storage systems Nov. 26, 1996
5572985 Recirculating system with by-pass valve Nov. 12, 1996
5347956 Water heater with integral mixing valve Sep. 20, 1994
5233970 Semi-instantaneous water heater with helical heat exchanger Aug. 10, 1993
5169291 Water heater with shut-off valve Dec. 8, 1992
5115491 Tempering system for storage tank water heaters utilizing inlet and outlet heat exchanger May. 19, 1992
5072717 Hot water priming device Dec. 17, 1991
5042524 Demand recovery hot water system Aug. 27, 1991
5029605 Fluid vessel overflow system Jul. 9, 1991
5020721 Rapid recovery gas hot water heater Jun. 4, 1991
4966127 Method and apparatus for saving energy in direct fired boilers Oct. 30, 1990
4945942 Accelerated hot water delivery system Aug. 7, 1990
4944253 Safety system for hydronic water heaters and boilers Jul. 31, 1990
4930551 Automatic hot water recovery apparatus Jun. 5, 1990
4909274 Valve apparatus Mar. 20, 1990
4896658 Hot water supply system Jan. 30, 1990
4869232 Oil and gas water heater Sep. 26, 1989
4805662 Hot water heater failure protection device with solenoid Feb. 21, 1989
4765280 Direct-contact type hot water heater Aug. 23, 1988

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