Direct vent fireplace

Details Direct vent fireplace Direct vent fireplace

1995-08-18

1997-09-23

Jones, Larry

Stoves and furnaces

Fireplaces or accessories

Fluid fuel

126513, 126 80, F24C 300

Patent

active

056693745

ABSTRACT:
A direct vent gas fireplace is provided with a heat shield forming a combustion air expansion and distribution chamber covering a substantial portion of the upper surface of the firebox enclosure and having a circular combustion air inlet opening in its upper surface and being in communication with the lower portion of the firebox, and the products of combustion from the firebox are directed out of the fireplace through a pipe extending through the upper enclosure surface and out through the combustion air inlet opening in the heat shield with the axis of the pipe being offset from the center of the inlet opening so that when a combustion air inlet duct is sleeved over the pipe and connected to the inlet opening a portion of the combustion air path between the pipe and duct which feeds into the combustion air expansion and distribution chamber is substantially widened to provide space for the combustion air to expand outwardly rather than backing up the combustion air duct.
In its preferred form, the firebox and its enclosure have sloping upper surfaces sloping downwardly to the rear and the heat shield and combustion air expansion and distribution chamber is in the form of an inverted pan overlying and substantially covering the sloping enclosure surface.

REFERENCES:
patent: 471575 (1892-03-01), Shaw
patent: 1797909 (1931-03-01), Ellsdorf
patent: 3614949 (1971-10-01), Goodgion
patent: 4487195 (1984-12-01), Syme et al.
patent: 4793322 (1988-12-01), Shimek
patent: 4909227 (1990-03-01), Rieger
patent: 5267552 (1993-12-01), Squires et al.

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