Furnaces – Doors – Explosion relief doors
Patent
1979-03-23
1981-04-14
Yuen, Henry C.
Furnaces
Doors
Explosion relief doors
110175R, 126191, F23M 700
Patent
active
042612675
ABSTRACT:
The improved furnace of this invention may be used to produce heat by the burning of wood or other combustible matter. The furnace has a combustion chamber with a generally vertical axis and a chamber access door for loading combustible matter into the furnace. The access door in its normally closed position lies in a plane extending upwardly and outwardly from the axis of the chamber. A smoke limiting means which is positioned above the access door extends to the plane of closure of the door. This smoke limiting means limits the escape of smoke and other combustion products when the access door is open. The smoke limiting means may have a port for visually observing the interior of the chamber and for admitting a poker therein. An air injector extending through the door directs air to the burning material within the combustion chamber. The access door may have attached to it a grate extending into the chamber for holding the combustible material as it burns. The grate moves with the door making it easier to load fresh combustible matter onto the grate when the door is open and also shaking down previously burned material from the grate as the door is opened and closed. Finally, the furnace may be adapted with a latch means which automatically engages as the access door is opened but requires manual operation for release thereby preventing accidental closure of the door.
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Lesmeister Adrian Z.
Maresh David J.
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