Electric resistance heating devices – Heating devices – Continuous flow type fluid heater
Reexamination Certificate
2007-11-20
2007-11-20
Campbell, Thor S. (Department: 3742)
Electric resistance heating devices
Heating devices
Continuous flow type fluid heater
C392S441000, C392S450000
Reexamination Certificate
active
11620311
ABSTRACT:
A representatively pumpless water heater system has an instantaneous water heater coupled in series with a storage water heater by piping circuitry incorporating a bypass valve and a mixing valve and useable to route pressurized incoming cold water sequentially through the instantaneous and storage type heaters. A control system (1) operates the bypass valve to cause a selectively variable portion of the incoming cold water to bypass the instantaneous heater and flow to the mixing valve, and (2) operates the mixing valve to blend the bypassed cold water with hot water exiting the storage heater to maintain a predetermined temperature of heated water exiting the system. Another system embodiment adds a directional bypass valve operable by the control system to selectively divert to the mixing valve a portion of the heated water exiting the instantaneous heater for delivery to the storage heater.
REFERENCES:
patent: 2604265 (1952-07-01), Thomas
patent: 3885584 (1975-05-01), Hock
patent: 4246764 (1981-01-01), Papadakos
patent: 4977885 (1990-12-01), Herweyer et al.
patent: 5056712 (1991-10-01), Enck
patent: 5323803 (1994-06-01), Blumenauer
patent: 5524666 (1996-06-01), Linn
patent: 5588088 (1996-12-01), Flaman
patent: 5701387 (1997-12-01), McGugan
patent: 5983922 (1999-11-01), Laing et al.
patent: 6024290 (2000-02-01), Dosani et al.
patent: 6837443 (2005-01-01), Saitoh et al.
patent: 6861621 (2005-03-01), Ghent
patent: 6874694 (2005-04-01), Saitoh et al.
patent: 6306915 (1994-11-01), None
patent: 7011687 (1995-10-01), None
patent: 2003004303 (2003-01-01), None
patent: WO 01/44727 (2001-06-01), None
Rinnai “2532 Series Water Heaters” drawings WH-1-SB and WH-1-R (Sep. 30, 2002).
Rheem “Tankless Water Heaters” Drawing No. 1102 ( Dec. 30, 2002).
Paloma “How it Works” Drawing (Nov. 11, 2005).
Combo Water Heater Series Connetction Figure #1 Drawing (Sep. 29, 2005).
Boros Jozef
Harrigill William T.
Thenappan Subbu
Campbell Thor S.
Haynes and Boone LLP
Rheem Manufacturing Company
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