Heat treatment apparatus

Details Heat treatment apparatus Heat treatment apparatus

1996-12-19

1998-03-31

Bennett, Henry A.

Heating

Work feeding, agitating, discharging or conveying...

Seal at chamber wall for conveyor arm or shaft

432242, 432243, 432239, 432250, 110181, 414156, F27D 300

Patent

active

057331162

ABSTRACT:
A heat treatment apparatus having a heat treatment furnace into which a hydrocarbon gas and an oxidization gas are introduced, wherein an outlet opening of a valve through which a pusher for pushing a work to be heat treated in the heat treatment furnace is movable is hermetically connected to a pusher insertion port formed on a wall of the heat treatment furnace, and a seal box is connected hermetically to an inlet opening of the valve, the pusher being movable hermetically through the seal box. An elevator door for opening and closing the heat treatment furnace has a guide pin projected therefrom, and a jam having an upper hook surface for receiving the guide pin thereon, the jam being pivotally supported so that when the elevator door is lowered, the elevator door is moved by the jam toward a seal surface of the opening of the heat treatment furnace. A guide groove for guiding a pin of an elevator door in the vertical direction is curved at the lower portion thereof toward a seal surface of the opening of the heat treatment furnace. A seal packing is provided on a seal surface of an opening of the heat treatment furnace, and a cooling pipe is provided near the seal packing.

REFERENCES:
patent: 4455177 (1984-06-01), Filippov et al.
patent: 4579523 (1986-04-01), Laiquddin et al.
patent: 4582301 (1986-04-01), Wunning
patent: 4741695 (1988-05-01), Ushijima
patent: 5225144 (1993-07-01), Nanba et al.
patent: 5435686 (1995-07-01), Canner

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