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Class Information
Number: 237/66
Name: Heating systems > Water > Expansion tanks
Description: Tanks or chambers limited in use to provide for the expansion of the water in the circulating pipes and radiators of water heating systems.

Patents under this class:

Patent Number Title Of Patent Date Issued
8711074 Flat panel display Apr. 29, 2014
8375991 Valve assembly Feb. 19, 2013
6739517 Non-circulating tank and kit for use with liquid heating unit May. 25, 2004
6557774 Non-pressurized space heating system and apparatus May. 6, 2003
6526921 Method for operating a closed hot-water installation and apparatus to be used therewith Mar. 4, 2003
6119951 Expansion control for a closed fluid circulation system Sep. 19, 2000
6041820 Service and heating water combined expansion tank Mar. 28, 2000
5964215 Heating installation with closed liquid circuit Oct. 12, 1999
5829677 Water heating and cooling system having a dual water mixing and air separator apparatus Nov. 3, 1998
5738277 Water heating and cooling system having a dual water mixing and air separator apparatus Apr. 14, 1998
5671773 Automatic fluid-supply apparatus for a boiler system Sep. 30, 1997
5456409 Method and device for maintaining a fluid at a working pressure in a substantially closed fluid circulation system Oct. 10, 1995
5344071 Expansion tank airation device Sep. 6, 1994
5244037 Closed loop ground source pressurized system for a heat pump Sep. 14, 1993
5007583 Device for accomodating expansion in fluid circulation systems Apr. 16, 1991
4909312 Interface equipment between a heat pump and a buried heat exchanger Mar. 20, 1990
4733721 Apparatus and method for heating a fluid Mar. 29, 1988
4732319 Fill valve for a water heating system Mar. 22, 1988
4723705 Device for ventilating a closed conduit system Feb. 9, 1988
4718922 Method of and apparatus for the deaeration of liquid flowing in a closed circulation system Jan. 12, 1988
4516563 Heating device May. 14, 1985
4479605 Heating system Oct. 30, 1984
4471907 Venturi pressurizer for incompressible-liquid circulating systems Sep. 18, 1984
4456172 Method of and apparatus for the degasification of circulation systems for liquids Jun. 26, 1984
4408716 Flue gas heat recovery system Oct. 11, 1983
4383643 Boiler tank for efficiently circulating low-temperature water May. 17, 1983
4345715 Safety device for a heat exchange equipment filled with pressurized liquid Aug. 24, 1982
4309982 Process and apparatus for the preparation of hot water from solar energy Jan. 12, 1982
4296883 Heat generation and distribution system Oct. 27, 1981
4263498 Expansion chamber arrangement for water heating and dispensing device Apr. 21, 1981
4248378 Self priming devices for indirect domestic water heating systems Feb. 3, 1981
4200147 Device for the exchange of heat between supply air and exhaust air in indoor premises Apr. 29, 1980
4137965 Waste heat recovery system Feb. 6, 1979
4135571 Thermal storage systems Jan. 23, 1979
4049047 Liquid heat exchange system with separately compartmented make-up tanks Sep. 20, 1977
4013221 Pressure balancing device for heating systems Mar. 22, 1977
3989032 Solar water heating system Nov. 2, 1976
3937275 System for thermal exchangers Feb. 10, 1976
3934556 Boiler using combustible fluid Jan. 27, 1976

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