Furnaces – Draft regulators – Damper
Patent
1975-12-15
1976-12-14
Sprague, Kenneth W.
Furnaces
Draft regulators
Damper
126285A, F23L 1306
Patent
active
039968642
ABSTRACT:
A damper for controlling the passage of combustion gases through a conduit in a furnace. The damper is a mass of formed refractory material shiftable through an opening in the side of the conduit between an operative position extending into the conduit and inoperative position spaced laterally of the conduit. The damper is mounted on an elongate hollow beam which has a coolant fluid flow passage extending therethrough and apertures through which coolant fluid may pass to cool the exterior of the damper and support. A housing extends laterally of the conduit and has side and end walls positioned to receive and enclose portions of the damper and damper support retracted from the conduit. The damper support is enclosed and shielded by the housing walls throughout operation of the apparatus. A coolant fluid supply is operable to inject coolant fluid under pressure into the damper support so that such fluid may flow outwardly therefrom to cool the damper support and surfaces of the damper.
REFERENCES:
patent: 969188 (1910-09-01), Pruitt
patent: 1634559 (1927-07-01), Schmidt
patent: 1684200 (1928-09-01), Pollack
patent: 3598067 (1971-08-01), Jones
patent: 3716004 (1973-02-01), Jones
Agnew S. J.
Sprague Kenneth W.
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