Atmospheric door closure

Details Atmospheric door closure Atmospheric door closure

1989-10-18

1990-12-25

Yuen, Henry C.

Heating

Heating or heat retaining work chamber structure

Door, cover or port

432253, 432239, F27D 118

Patent

active

049798979

ABSTRACT:
Atmospheric door closure for sealing of the orifice of a process tube. A quartz end plate positions at the end of a plurality of spring loaded quartz rods to seal against the orifice of the process tube. The quartz rods slide against spring pressure behind Teflon sleeves contained in horizontal tubes. Springs in the horizontal tubes provide pressure against the quartz end plate when the quartz plate engages a process tube. A clamp and adjusting assembly secures to the paddle support shaft, and provides for alignment of the quartz rods and plate with respect to the paddle support shaft and the orifice of the process tube.

REFERENCES:
patent: 4439146 (1984-03-01), Sugita
patent: 4523885 (1985-06-01), Bayne et al.
patent: 4579523 (1986-04-01), Laiquddin et al.
patent: 4752219 (1988-06-01), Fisher, Jr.
"Crystar Diffusion Components", Norton Company.

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