Natural draft water heater
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Apr 30, 2002
Issued Date -
N/A
app pub date -
Apr 28, 2000
filing date -
Sep 24, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention relates to a water heater comprised of a cylindrical tank 18 which has a central flue 20 that is mounted with the cylinder axis 40 vertical. The water heater further includes a gas burner 22 provided the base of the tank 18, which burns a gaseous fuel so as to discharge heated gases up through the central flue 20 from the base to the top of the tank 18. A housing 12 surrounds the exterior of the tank and is spaced away from the domed top 34 and side walls of the tank 18, to thereby define a generally annular cylindrical space 36 between the radially outer surface of the tank 18 and the radially inner surface of the housing 12. The annular space 36 is in gas flow communication with the upper end of the flue 20 and is provided with a discharge outlet 48 located at or adjacent the lower most end of the tank 18. In use heated gases pass up the central flue 20, over the top 34 of the tank 18, and down the annular space 36 to thereby heat both the radially inner and the radially outer surfaces of the tank 18 prior to exhausting from the heater.
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Family
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