System for use in a vertical furnace

Details System for use in a vertical furnace System for use in a vertical furnace

2007-08-22

2010-06-08

Wilson, Gregory A (Department: 3749)

Heating

Work feeding, agitating, discharging or conveying...

Seal at chamber wall for conveyor arm or shaft

C432S242000, C432S250000, C049S475100, C049S477100

Reexamination Certificate

active

07731494

ABSTRACT:
A system used in a vertical furnace is provided that includes a tube. The tube includes a tube flange at its lower end. The tube flange provides a first sealing surface at its lower end. Further, there is a structural member at the lower surface of the tube flange. This structural member extends vertically away from the lower surface of the tube flange at a position that is displaced inwardly from the first sealing surface. The system also includes a removable door plate that provides a second sealing surface at its upper surface. The second sealing surface of the removable door plate is sealed with the first sealing surface of the tube flange.

REFERENCES:
patent: 5207573 (1993-05-01), Miyagi et al.
patent: 5902406 (1999-05-01), Uchiyama et al.
patent: 6709525 (2004-03-01), Song
patent: 6988886 (2006-01-01), Takata et al.

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