Liquid heaters and vaporizers – Flue – Vertical
Reexamination Certificate
2006-09-05
2006-09-05
Wilson, Gregory (Department: 3749)
Liquid heaters and vaporizers
Flue
Vertical
C122S155200, C122S044200, C122S160000
Reexamination Certificate
active
07100541
ABSTRACT:
A water heater comprising a closed tank having a water inlet for connection with a water supply, and a hot water outlet connected to the tank interior; a flue pipe extending vertically through the tank and having an upper portion for connection with a vent pipe; a cylinder having a lower end and upper open end with means for opening disposed within the flue pipe, and spaced from inner walls of the flue pipe, and extending substantially the length of the flue pipe; a burner disposed in a lower region of the cylinder and above the lower end thereof, such that combustion products from the burner rise through the cylinder; and a water conducing coil disposed within the cylinder connected with the interior of the tank.
REFERENCES:
patent: 1016398 (1912-02-01), Burroughs
patent: 1632888 (1927-06-01), Davis et al.
patent: 2642046 (1953-06-01), Alexander
patent: 4356794 (1982-11-01), Bouman et al.
patent: 4662350 (1987-05-01), Mossbach
patent: 4702226 (1987-10-01), Shelley
patent: 6508208 (2003-01-01), Frasure et al.
Frasure Blake D.
Frasure Charles J.
Frasure Greg A.
Frasure Paul J.
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