Patent ID: 6918999

Claim:
A device to at least partially seal a leveler door opening of a coke oven chamber during top charging of the coking coal comprising a housing having a first end opening connectable to the leveler door opening, a leveler bar guidable into a second end opening and at least partially through an interior passageway of said housing and at least partially through said leveler door opening, said leveler bar including at least two side segments and at least one cross segment connecting said two side segments, said housing provided with a sealing mechanism to at least partially inhibit a flow of gases in front of said leveler door opening by creating a no-flow zone in a region in at least closely adjacent to the front of said leveler door opening, said sealing mechanism including a regulatable exhaust fan connected to said housing to expel gas substantially comprising air through an outlet opening in said housing and a flow measuring mechanism at least partially positioned in said housing between the coke oven and said outlet opening, said outlet opening positioned between said first and second end openings of said housing, said flow measuring mechanism at least partially controlling said regulatable exhaust fan to control a volume of said expelled gas through said outlet opening.