US 4,010,729 AGranted

Fireplace furnace

AssigneeJoglex Corporation

InventorGlen H. Egli

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Abstract

A forced-air heating fireplace grate comprises inlet- and exhaust-manifold ducts extending from the front to the rear of a fireplace and cross ducts extending between the inlet- and exhaust-manifold ducts across the fireplace. Cool air introduced into an outer end of the inlet-manifold duct, passes through the cross ducts to the exhaust-manifold duct and exits from the fireplace at an outer end of the exhaust-manifold duct. The inlet- and exhaust-manifold ducts, and the cross ducts are spaced to form hot-ash retaining spaces therebetween. Longitudinally extending grilles extend across the bottoms of the hot-ash retaining spaces to retain hot ashes therein. The fireplace grate is unobstructed across the top thereof so that logs of greater width than the grate can be placed upon the grate and includes an angled, vertical support in the front thereof to prevent logs from rolling off the front of the grate. Inlet and exhaust transfer ducts for communicating the grate with room air are reversible to opposite sides of the fireplace grate and their positions toward and away from the fireplace grate are also adjustable to accommodate varying fireplace depths.

A forced-air heating fireplace grate for supporting burning materials in a fireplace, said grate comprising:

a single, inlet-manifold duct to extend from front to rear of said fireplace for receiving cool air introduced into said fireplace grate, said single, inlet-manifold duct having an inlet opening for receiving said cool air, and at least three exit openings positioned along the length thereof for releasing air laterally thereof;
a single, exhaust-manifold duct to extend from front to rear of said fireplace for receiving all warm air in said fireplace grate prior to its expulsion from said fireplace grate, said single, exhaust-manifold duct having an exhaust opening positioned at the end thereof so as to be at the front of said fireplace when said grate is positioned in said fireplace and a number of inlet openings corresponding to said exit openings of said inlet-manifold duct positioned along the length thereof for receiving said warm air laterally thereof;
a separate cross duct interconnecting each of said exit openings of said inlet-manifold duct with a respective one of said inlet openings of said exhaust-manifold duct, said cross ducts being approximately equally spaced, one from the other, and extending from side-to-side of said fireplace when said fireplace grate is positioned in said fireplace, said inlet-and exhaust-manifold ducts and said cross ducts thereby defining elongated hot-ash retaining spaces therebetween surrounded by ducts;
legs attached to some of said ducts and extending downwardly from said ducts to support said ducts a substantial distance from the floor of said fireplace;
a single, individual hot-ash retaining cross-grille bar attached directly to said manifold ducts and extending longitudinally of, and across the bottom of each of said hot-ash retaining spaces so as to retain large amounts of hot ashes falling from said burning materials in said hot ash retaining spaces prior to its falling to the floor of said fireplace while allowing efficient fire-supporting ventilation.

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Abstract

Claims20