Gas-fired water heater

Details Gas-fired water heater Gas-fired water heater

2005-09-20

2005-09-20

Wilson, Gregory (Department: 3749)

Liquid heaters and vaporizers

Stand boiler

And condition responsive feature

C122S014200

Reexamination Certificate

active

06945196

ABSTRACT:
The water heater has an upright water tank (1), an exhaust flue (3) extending through the water tank, a combustion chamber (2) arranged under the water tank, an atmospheric gas burner (5) in the combustion chamber and a complete pre-mixing gas/air supply system with outside gas and air intakes. The gas burner has a burner mat (7) with a pressure drop less than 5 to up to 45 Pa. The combustion chamber (2) is provided with an opening (2b), which is not sealed, but enclosed in a flame-blocking manner. The gas burner (5) is attached to a wall section (2a), which is mounted releasably on the: combustion chamber wall (W) over opening (2b) so that a gap of predetermined width is formed between the wall section and wall (W), which prevents backfire of flames into the surroundings but admits secondary air.

REFERENCES:
patent: 4953510 (1990-09-01), Akkala et al.
patent: 5355841 (1994-10-01), Moore et al.
patent: 5875739 (1999-03-01), Joyce
patent: 5915954 (1999-06-01), Rodgers
patent: 6725811 (2004-04-01), Moore et al.
patent: 2003/0111023 (2003-06-01), Carbone et al.

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