Liquid heaters and vaporizers – Stand boiler – Fluid fuel burner
Reexamination Certificate
2005-09-08
2008-08-26
Wilson, Gregory A (Department: 3749)
Liquid heaters and vaporizers
Stand boiler
Fluid fuel burner
C122S018300, C126S378100
Reexamination Certificate
active
07415943
ABSTRACT:
A fuel-fired water heater has a single pass condensing-type heat exchanger disposed within its water storage tank portion. The heat exchanger includes a primary non-condensing portion defined by a combustion chamber positioned in an upper interior portion of the tank and having a spaced series of vertical tubes depending therefrom. A secondary condensing portion of the heat exchanger is defined by a plenum having a top side connected to the bottom ends of the vertical tubes, and a bottom side from which a downwardly coiled flue tube depends. A fuel burner generates hot combustion gases that are sequentially flowed into the combustion chamber and then downwardly through the balance of the heat exchanger in a single pass.
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Patent Examination B—Pravenn Jain—Australian Government IP Australia, Examiner's First Report on Patent Application No. 2006204645 by Rheem Manufacturing Company, Oct. 9, 2007, 2 pages.
Haney Jeffrey M.
Missoum Ozzie
Stephens Phillip W.
Welk Gregory M.
Zhang Qian
Haynes and Boone LLP
Rheem Manufacturing Company
Wilson Gregory A
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